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• Access Officejet Pro L7590 memory card reader

  - by luri

  I can't manage to access my printer's memory card reader in Nautilus. I can just access it with hp-unload. Here's a sample output from this command: lubuntu@L-X6:~$ hp-unload hp:/net/Officejet_Pro_L7500?zc=HP065193 HP Linux Imaging and Printing System (ver. 3.10.6) Photo Card Access Utility ver. 3.3 Copyright (c) 2001-9 Hewlett-Packard Development Company, LP This software comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to distribute it under certain conditions. See COPYING file for more details. Using device: hp:/net/Officejet_Pro_L7500?zc=HP065193 |error: Photo card write failed (Card may be write protected) / Photocard on device hp:/net/Officejet_Pro_L7500?zc=HP065193 mounted DO NOT REMOVE PHOTO CARD UNTIL YOU EXIT THIS PROGRAM warning: Photo card is write protected. Type 'help' for a list of commands. Type 'exit' to quit. pcard: / > ls \ Name Size Type dcim/ directory eos_digi.tal 0 B unknown/unknown 1 files, 0 B pcard: / > cd dcim |pcard: /dcim > ls | Name Size Type . directory .. directory 100eos5d/ directory 267canon/ directory 270canon/ directory 271canon/ directory 272canon/ directory 0 files, 0 B pcard: /dcim > cd 272canon -pcard: /dcim/272canon > ls \ Name Size Type . directory .. directory _mg_7201.jpg 3.1 MB image/jpeg ...........(some more files)................. _mg_7281.jpg 2.5 MB image/jpeg _mg_7282.jpg 2.5 MB image/jpeg 82 files, 241.6 MB (253377883) How can I acess it from nautilus or mount it as a filesystem? Note that this is similar to this other question: Can't get HP Officejet 6500 card reader to work. but actually there seemed to be no supported device here, while in my case I manage to access the memory card from hp-unload.

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• Opportunity Nokia's

  - by Andrew Clarke

  Nokia’s alliance with Microsoft is likely to be good news for anyone using Microsoft technologies, and particularly for .NET developers. Before the announcement, the future wasn’t looking so bright for the ‘mobile’ version of Windows, Windows Phone. Microsoft currently has only 3.1% of the Smartphone market, even though it has been involved in it for longer than its main rivals. Windows Phone has now got the basics right, but that is hardly sufficient by itself to change its predicament significantly. With Nokia's help, it is possible. Despite the promise of multi-tasking for third party apps, integration with Microsoft platforms such as Xbox and Office, direct integration of Twitter support, and the introduction of IE 9 “later this year”, there have been frustratingly few signs of urgency on Microsoft’s part in improving the Windows Phone  product. Until this happens, there seems little prospect of reward for third-party developers brave enough to support the platform with applications. This is puzzling when one sees how well SQL Server and Microsoft’s other server technologies have thrived in recent years, under good leadership from a management that understands the technology. The same just hasn’t been true for some of the consumer products. In consequence, iPads and Android tablets have already exposed diehard Windows users, for the first time, to an alternative GUI for consumer Tablet PCs, and the comparisons aren’t always in Windows’ favour. Nokia’s problem is obvious: Android’s meteoric rise. Android now has 33% of the worldwide market for smartphones, while the market share of Nokia’s Symbian has dropped from 44% to 31%. As details of the agreement emerge, it would seem that Nokia will bring a great deal of expertise, such as imaging and Nokia Maps, to Windows Phone that should make it more competitive. It is wrong to assume that Nokia’s decline will continue: the shock of Android’s sudden rise could be enough to sting them back to their previous form, and they have Microsoft’s huge resources and marketing clout to help them. For the sake of the whole Windows stack, I really hope the alliance succeeds.

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• Scaling an image using the mouse in C#

  - by Gaax

  Hey guys... I'm trying to use the position of the mouse to calculate the scaling factor for scaling an image. Basically, the further you get away from the center of the image, the bigger it gets; and the closer to the center you get, the smaller it gets. I have some code so far but it's acting really strange and I have absolutely no more ideas. First I'll let you know, one thing I was trying to do is average out 5 distances to get a more smooth resize animation. Here's my code: private void pictureBoxScale_MouseMove(object sender, MouseEventArgs e) { if (rotateScaleMode && isDraggingToScale) { // For Scaling int sourceWidth = pictureBox1.Image.Width; int sourceHeight = pictureBox1.Image.Height; float dCurrCent = 0; // distance between the current mouse pos and the center of the image float dPrevCent = 0; // distance between the previous mouse pos and the center of the image System.Drawing.Point imgCenter = new System.Drawing.Point(); imgCenter.X = pictureBox1.Location.X + (sourceWidth / 2); imgCenter.Y = pictureBox1.Location.Y + (sourceHeight / 2); // Calculating the distance between the current mouse location and the center of the image dCurrCent = (float)Math.Sqrt(Math.Pow(e.X - imgCenter.X, 2) + Math.Pow(e.Y - imgCenter.Y, 2)); // Calculating the distance between the previous mouse location and the center of the image dPrevCent = (float)Math.Sqrt(Math.Pow(prevMouseLoc.X - imgCenter.X, 2) + Math.Pow(prevMouseLoc.Y - imgCenter.Y, 2)); if (smoothScaleCount < 5) { dCurrCentSmooth[smoothScaleCount] = dCurrCent; dPrevCentSmooth[smoothScaleCount] = dPrevCent; } if (smoothScaleCount == 4) { float currCentSum = 0; float prevCentSum = 0; for (int i = 0; i < 4; i++) { currCentSum += dCurrCentSmooth[i]; } for (int i = 0; i < 4; i++) { prevCentSum += dPrevCentSmooth[i]; } float scaleAvg = (currCentSum / 5) / (prevCentSum / 5); int destWidth = (int)(sourceWidth * scaleAvg); int destHeight = (int)(sourceHeight * scaleAvg); // If statement is for limiting the size of the image if (destWidth > (currentRotatedImage.Width / 2) && destWidth < (currentRotatedImage.Width * 3) && destHeight > (currentRotatedImage.Height / 2) && destWidth < (currentRotatedImage.Width * 3)) { AForge.Imaging.Filters.ResizeBilinear resizeFilter = new AForge.Imaging.Filters.ResizeBilinear(destWidth, destHeight); pictureBox1.Image = resizeFilter.Apply((Bitmap)currentRotatedImage); pictureBox1.Size = pictureBox1.Image.Size; pictureBox1.Refresh(); } smoothScaleCount = -1; } prevMouseLoc = e.Location; currentScaledImage = pictureBox1.Image; smoothScaleCount++; } }

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• Making files generally available on Linux system (when security is relatively unimportant)?

  - by Ole Thomsen Buus

  Hi, I am using Ubuntu 9.10 on a stationary PC. I have a secondary 1 TB harddrive with a single big logical partition (currently formatted as ext4). It is mounted as /usr3 with options user, exec in /etc/fstab. I am doing highspeed imaging experiments. Well, only 260fps, but that still creates many individual files since each frames is saved as one png-file. The stationary is not used by anyone other than me which is why the default security model posed by ubuntu is not necessary. What is the best way to make the entire contents of /usr3 generally available on all systems. In case I need to move the harddrive to another Ubuntu 9.x or 10.x machine? When grabbing image with the firewire camera I use a selfmade grabbing software-utility (console based) in sudo-mode. This creates all files with root as owner and group. I am logged in as user otb and usually I do the following when having to make files generally available to otb: sudo chown otb -R * sudo chgrp otb -R * sudo chmod a=rwx -R * This takes some time since the disk now contains individual ~200000 files. After this, how would linux behave if I moved the harddrive to another system where the user otb is also available? Would the files still be accessible without sudo use?

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• Scaling an image using the mouse in a WinForms application?

  - by Gaax

  I'm trying to use the position of the mouse to calculate the scaling factor for scaling an image. Basically, the further you get away from the center of the image, the bigger it gets; and the closer to the center you get, the smaller it gets. I have some code so far but it's acting really strange and I have absolutely no more ideas. First I'll let you know, one thing I was trying to do is average out 5 distances to get a more smooth resize animation. Here's my code: private void pictureBoxScale_MouseMove(object sender, MouseEventArgs e) { if (rotateScaleMode && isDraggingToScale) { // For Scaling int sourceWidth = pictureBox1.Image.Width; int sourceHeight = pictureBox1.Image.Height; float dCurrCent = 0; // distance between the current mouse pos and the center of the image float dPrevCent = 0; // distance between the previous mouse pos and the center of the image System.Drawing.Point imgCenter = new System.Drawing.Point(); imgCenter.X = pictureBox1.Location.X + (sourceWidth / 2); imgCenter.Y = pictureBox1.Location.Y + (sourceHeight / 2); // Calculating the distance between the current mouse location and the center of the image dCurrCent = (float)Math.Sqrt(Math.Pow(e.X - imgCenter.X, 2) + Math.Pow(e.Y - imgCenter.Y, 2)); // Calculating the distance between the previous mouse location and the center of the image dPrevCent = (float)Math.Sqrt(Math.Pow(prevMouseLoc.X - imgCenter.X, 2) + Math.Pow(prevMouseLoc.Y - imgCenter.Y, 2)); if (smoothScaleCount < 5) { dCurrCentSmooth[smoothScaleCount] = dCurrCent; dPrevCentSmooth[smoothScaleCount] = dPrevCent; } if (smoothScaleCount == 4) { float currCentSum = 0; float prevCentSum = 0; for (int i = 0; i < 4; i++) { currCentSum += dCurrCentSmooth[i]; } for (int i = 0; i < 4; i++) { prevCentSum += dPrevCentSmooth[i]; } float scaleAvg = (currCentSum / 5) / (prevCentSum / 5); int destWidth = (int)(sourceWidth * scaleAvg); int destHeight = (int)(sourceHeight * scaleAvg); // If statement is for limiting the size of the image if (destWidth > (currentRotatedImage.Width / 2) && destWidth < (currentRotatedImage.Width * 3) && destHeight > (currentRotatedImage.Height / 2) && destWidth < (currentRotatedImage.Width * 3)) { AForge.Imaging.Filters.ResizeBilinear resizeFilter = new AForge.Imaging.Filters.ResizeBilinear(destWidth, destHeight); pictureBox1.Image = resizeFilter.Apply((Bitmap)currentRotatedImage); pictureBox1.Size = pictureBox1.Image.Size; pictureBox1.Refresh(); } smoothScaleCount = -1; } prevMouseLoc = e.Location; currentScaledImage = pictureBox1.Image; smoothScaleCount++; } }

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• File doesn't exist when trying to change permissions following the avasys image scan manual

  - by Howard Graham

  I was finally able to connect to avasys.jp and downloaded and installed iscan_2.28.1-3.ltdl7_amd64.deb iscan-data_1.13.0-1_all.deb. The programs appeared to install correctly. I then ran sane-find-scanner and got back: found USB scanner (vendor=0x04b8, product=0x012d) at libusb:001:003 I then ran lsusb and got back: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 003: ID 04b8:012d Seiko Epson Corp. Perfection V10/V100 (GT-S600/F650) Bus 001 Device 004: ID 03f0:4817 Hewlett-Packard Bus 002 Device 002: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse the avasys image scan manual instructed me to run chmod 0666 /proc/bus/usb/001/003 which returned chmod: cannot access `/proc/bus/usb/001/003': No such file or directory In 12.04, no such directory exists. 12.04 appears to deal with USB in another way. What must I do to get the usb port 001/003 recognized by xsane and sane as the port where the scanner can be located? What must I do to continue installing the scanner?

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• WebCenter at Oracle Day Toronto

  - by Lance Shaw

  The Oracle Day event took place in Toronto yesterday at the Hyatt Regency Hotel downtown.  Attendance was excellent and it was standing room only at the keynote sessions.   Anytime the venue has to bring in chairs to handle the overflow crowd, you know there is a lot of interest! This year, WebCenter was featured prominently as part of the Fusion Middleware session track.  What was interesting to see was just how many customers are interested in consolidating and simplifying their existing infrastructure.  So many companies are still struggling with information silos such as file shares, SharePoint Sites and a myriad of departmental or process-centric repositories.  Naturally, these get more and more expensive to manage over time so there is a high level of interest in reducing the size, scope and cost of this infrastructure.  When companies see how they can use Fusion Middleware and related technologies to integrate with WebCenter Content, Imaging and other solutions to centralize content delivery across business applications, they quickly realize that there are significant cost savings to be had. Oracle Day Events are happening all over the world and there is likely going to be one near you.  To check out the full list and to register, visit the Event page here.  It is a great way to not only hear about WebCenter and how it can be used to your advantage, but also a great way to learn about the broader set of related products in the Fusion Middleware portfolio that are available to extend and enhance the power of your particular business solutions. If you cannot make it, or missed the event in your area, be sure to visit our new WebCenter Content page with a variety of informative assets all in one simple location.  It's a new page designed to provide you with easy access to customer stories, videos, whitepapers, webcasts and more.  We hope you find it valuable!

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• Can certain system-hungry modules be disabled in Ubuntu?

  - by Ole Thomsen Buus

  Hi, Let me add some context: I am currently using Ubuntu 9.10 64-bit (Desktop) on a relatively powerful stationary PC (Intel Core i7 920, 12GB ram). My purpose is highspeed imaging with a pointgrey Grashopper machine-vision camera (for research, PhD project). This camera is capable of 200 fps at full VGA (640x480) resolution. The camera is connected using Firewire (1394b) and the drivers and software from Pointgrey works great. I have developed a console C++ application that can grap a certain number of frames to preallocated memory and after this also save the grapped frames to harddrive. Currently it works fine but sometimes I am observing a few framedrops (1-3). When this happens I reset the experiment and repeat the recording and usually i am lucky the second time with no framedrops (the camera-driver has a internal framecounter that I am using). Question: I usually go to tty1 and use "sudo service gdm stop" to disable the graphical frontend. It seems to release some memory though that is not my main concern. My concern is CPU resources. Are there other system hungry modules that can be disabled temporarily such that the CPU gets less busy on Ubuntu 9.10? At some point in the future I will update to 10.10. Should I perhaps option for the server edition instead? Thanks.

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• saved image in the picturebox shows no preview

  - by Nivas

  Hi iam new to C# and have loaded the image in the picture box using menustrip and have displayed some text using picturebox_Paint and label. now i tried to save the image (with image and text) using save event from the menustrip. in the saved location the file shows as no preview avaliable and when i tried to open the file it shows out of memory. can any one say where iam going worng.... my coades private void openToolStripMenuItem_Click(object sender, EventArgs e) { string file = ""; OpenFD.FileName = ""; OpenFD.Title = "open image"; OpenFD.InitialDirectory = "C"; OpenFD.Filter = "JPEG|.jpg|Bmp|.bmp|All Files|..*"; if (OpenFD.ShowDialog() == DialogResult.OK) { file = OpenFD.FileName; pictureBox1.Image = Image.FromFile(file); sz = pictureBox1.Size; a=sz.Width; b= sz.Height; } private void pictureBox1_MouseMove(object sender, MouseEventArgs e) { switch (e.Button) { case MouseButtons.Left: { rect = new Rectangle(rect.Left, rect.Top, e.X - rect.Left, e.Y - rect.Top); this.Invalidate(); y = flag.e; Application.DoEvents(); break; } } } private void pictureBox1_MouseDown(object sender, MouseEventArgs e) { rect = new Rectangle(e.X, e.Y, 0, 0); this.Invalidate(); } private void pictureBox1_Paint(object sender, PaintEventArgs e) { using (Pen pen = new Pen(Color.Red, 2)) e.Graphics.DrawRectangle(pen, rect); //e.Graphics.DrawString(label1.Text, label1.Font, new // SolidBrush(label1.ForeColor), label1.Left - pictureBox1.Left, label1.Top - pictureBox1.Top); if (label1.TextAlign == ContentAlignment.TopLeft) { e.Graphics.DrawString(label1.Text, label1.Font, new SolidBrush(label1.ForeColor), label1.Bounds); } else if (label1.TextAlign == ContentAlignment.TopCenter) { SizeF size = e.Graphics.MeasureString(label1.Text, label1.Font); float left = ((float)this.Width + label1.Left) / 2 - size.Width / 2; RectangleF rect1 = new RectangleF(left, (float)label1.Top, size.Width, label1.Height); e.Graphics.DrawString(label1.Text, label1.Font, new SolidBrush(label1.ForeColor), rect1); } else { SizeF size = e.Graphics.MeasureString(label1.Text, label1.Font); float left = (float)label1.Width - size.Width + label1.Left; RectangleF rect1 = new RectangleF(left, (float)label1.Top, size.Width, label1.Height); e.Graphics.DrawString(label1.Text, label1.Font, new SolidBrush(label1.ForeColor), rect1); } label1.Top = rect.Top; label1.Left = rect.Left; label1.Width = rect.Width; label1.Height = rect.Height; } private void saveToolStripMenuItem_Click(object sender, EventArgs e) { SaveFileDialog SaveFD1 = new SaveFileDialog(); //string Sd_file = ""; SaveFD1.FileName = ""; SaveFD1.InitialDirectory = "C"; SaveFD1.Title = "save file Name"; SaveFD1.Filter= "JPG|.jpg|Bmp|.bmp"; if (SaveFD1.ShowDialog() != DialogResult.Cancel) { System.IO.Stream filename = (System.IO.FileStream)SaveFD1.OpenFile(); if (SaveFD1.Filter == "JPG") pictureBox1.Image.Save(SaveFD1.FileName); //pictureBox1.Image.Save (filename, System.Drawing.Imaging.ImageFormat.Jpeg); else if (SaveFD1.Filter == "Bmp") { //pictureBox1.Image.Save(filename, System.Drawing.Imaging.ImageFormat.Bmp); } filename.Close(); } }

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• how to recover lost partitions data

  - by TheJoester

  I have a 2TB SATA drive that was being used as file storage on my UBUNTU computer. I was re-imaging my windows box so I used that drive to back up some files to it. I did this by taking the drive from my windows PC and putting it in my UBUNTU PC, mounted it and copied the files over. After the windows refresh I thought it would be easier to take the 2 TB drive and dock it in the external dock my Windows case has built in. Anyway it would recognize in BIOS but windows would not see it (because it was EXT3 or EXT4) so when I went into the disk manager it advised me the drive needed to be initialized. Me not thinking I initialized it as a GUID Partition table. Now it sees it as a blank drive, even in UBUNTU. I have done nothing else to write or change the drive. I was wondering if there is a qay to repair the old partitioning and get access to my files back? many thanks! EDIT: I followed the instructions in the link @kniwor sent me. I used the command sudo gpart -W /dev/sda /dev/sda and here was the result: Guessed primary partition table: Primary partition(1) type: 007(0x07)(OS/2 HPFS, NTFS, QNX or Advanced UNIX) size: 0mb #s(1) s(2861671176-2861671176) chs: (1023/254/63)-(1023/254/63)d (178130/202/1)-(178130/202/1)r Primary partition(2) type: 007(0x07)(OS/2 HPFS, NTFS, QNX or Advanced UNIX) size: 0mb #s(1) s(3484550160-3484550160) chs: (1023/254/63)-(1023/254/63)d (216903/55/1)-(216903/55/1)r Primary partition(3) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Primary partition(4) type: 000(0x00)(unused) size: 0mb #s(0) s(0-0) chs: (0/0/0)-(0/0/0)d (0/0/0)-(0/0/0)r Not sure it found what I wanted. suggestions?

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• InteropBitmap to BitmapImage

  - by Tony

  Hi, I'm trying to Convert a Bitmap (SystemIcons.Question) to a BitmapImage so I can use it in a WPF Image control. I have the following method to convert it to a BitmapSource, but it returns an InteropBitmapImage, now the problem is how to convert it to a BitmapImage. A direct cast does not seem to work. Does anybody know how to do it? CODE: public BitmapSource ConvertToBitmapSource() { int width = SystemIcons.Question.Width; int height = SystemIcons.Question.Height; object a = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(SystemIcons.Question.ToBitmap().GetHbitmap(), IntPtr.Zero, System.Windows.Int32Rect.Empty, BitmapSizeOptions.FromWidthAndHeight(width, height)); return (BitmapSource)a; } property to return BitmapImage: (Bound to my Image Control) public BitmapImage QuestionIcon { get { return (BitmapImage)ConvertToBitmapSource(); } }

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• Rendering WPF DrawingGroup to single ImageSource

  - by Xander

  Currently I'm using a System.Windows.Media.DrawingGroup to store some tiled images (ImageDrawing) inside the Children-DrawingCollection property. Well the problem is now, this method gets really slow if you display the entire DrawingGroup in an Image control, because my DrawingGroup can contain hundreds or even thousands of small images it can really mess up the performance. So my first thought was to somehow render a single image from all the small ones inside the DrawingGroup and then only display that image, that would be much faster. But as you might have figured out I haven't found any solution so simply combine several images with WPF Imaging. It would really be great if someone could help with this problem or tell me how i can improve the performance with the DrawingGroup or even use another approach. One last thing, currently I'm using a RenderTargetBitmap to generate a single BitmapSource from the DrawingGroup, this approach isn't really faster, but it makes the scrolling and working on the Image control at least a little smoother.

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• The problem with installing PIL using virtualenv or buildout.

  - by Alexander Artemenko

  When I install PIL using easy_install or buildout it installs in such way, that I must do 'import Image', not 'from PIL import Image'. However, if I do "apt-get install python-imaging" or use "pip -E test_pil install PIL", all work fine. Here are examples of how I trying to install PIL using virtualenv: # virtualenv --no-site-packages test_pil # test_pil/bin/easy_install PIL # test_pil/bin/python Python 2.5.1 (r251:54863, Feb 6 2009, 19:02:12) [GCC 4.0.1 (Apple Inc. build 5465)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import PIL Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named PIL I see, that easy_install pack PIL into the Egg, and PIP does not. Same thing with buildbot, it uses eggs. How could I install PIL properly, using easy_install or buildout?

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• How to draw semi-transparent text on a graphics object?

  - by awe

  I want to draw a text with 32 bit transparency on a graphics object. When I try, I only get black color in the result. If I try to draw a line with the same semitransparent color, it works perfectly. I have this code: lBitmap As New Bitmap(32, 32, PixelFormat.Format32bppArgb) lGraphic As Graphics = Graphics.FromImage(lBitmap) lGraphic.SmoothingMode = SmoothingMode.HighQuality lGraphic.InterpolationMode = InterpolationMode.HighQualityBicubic lGraphic.Clear(Color.Transparent) Dim lTestTransparencyColor As Color = Color.FromArgb(100, 140, 0, 230) lGraphic.DrawLine(New Pen(lTestTransparencyColor), 0, 0, 32, 32) lBrush As New SolidBrush(lTestTransparencyColor) lGraphic.DrawString("A", New Font("Arial", 12), lBrush, 0, 0) Dim lImage As Image = lBitmap lImage.Save("D:\Test.png", Imaging.ImageFormat.Png) The line is drawn with the transparency applied correctly, but the text is black with no transparency. I was thinking it may be that SolidBrush does not support transparency, but I found a predefined brush named Transparent (Brushes.Transparent) that was a SolidBrush when I looked at it in debug. I tried to use Brushes.Transparent as the brush when drawing the text, and it was successfully not showing at all. That means I get full transparency to work, but not partial transparency.

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• Using Bitmap.LockBits and Marshal.Copy in IronPython not changing image as expected

  - by Leonard H Martin

  Hi all, I have written the following IronPython code: import clr clr.AddReference("System.Drawing") from System import * from System.Drawing import * from System.Drawing.Imaging import * originalImage = Bitmap("Test.bmp") def RedTint(bitmap): bmData = bitmap.LockBits(Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb) ptr = bmData.Scan0 bytes = bmData.Stride * bitmap.Height rgbValues = Array.CreateInstance(Byte, bytes) Runtime.InteropServices.Marshal.Copy(ptr, rgbValues, 0, bytes) for i in rgbValues[::3]: i = 255 Runtime.InteropServices.Marshal.Copy(rgbValues, 0, ptr, bytes) bitmap.UnlockBits(bmData) return bitmap newPic = RedTint(originalImage) newPic.Save("New.bmp") Which is my interpretation of this MSDN code sample: http://msdn.microsoft.com/en-us/library/5ey6h79d.aspx except that I am saving the altered bitmap instead of displaying it in a Form. The code runs, however the newly saved bitmap is an exact copy of the original image with no sign of any changes having occurred (it's supposed to create a red tint). Could anyone advise what's wrong with my code? The image I'm using is simply a 24bpp bitmap I created in Paint (it's just a big white rectangle!), using IronPython 2.6 and on Windows 7 (x64) with .Net Framework 3.5 SP1 installed.

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• How to capture screen with timer using C#?

  - by ankush

  This is a Windows application using C#. I want to capture a screen shot with a timer. The timer is set to a 5000 ms interval. As the timer is started, the desktop screen should be captured with the source window caption. try { System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer(); timer.Tick += new EventHandler(timer2_Tick); timer.Interval = (100) * (50); timer.Enabled = true; timer.Start(); ScreenShots sc = new ScreenShots(); sc.pictureBox1.Image = system_serveillance.CaptureScreen.GetDesktopImage(); while(sc.pictureBox1.Image != null) { sc.pictureBox1.Image.Save("s"+".jpg", System.Drawing.Imaging.ImageFormat.Jpeg); sc.pictureBox1.Image = null; } This code is not working properly. How can I make it work?

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• Serverside image processing

  - by spol

  I am designing a web application that does server side image processing in real time. Processing tasks include applying different effects like grayscale, blur, oil paint, pencil sketch etc on images in various formats. I want to build it using java/servlets which I am already familiar with. I found 3 options, 1) Use pure java imaging libraries like java.awt or http://www.jhlabs.com/ip/index.html 2) Use command line tools like Gimp/ImageMagick 3) Use c,c++ image libraries that have java bindings. I don't know which of the above options is good keeping the performance in mind. It looks like option 2) and 3) are good performance wise, but I want to be sure before I rule out 1). I have also heard gimp cannot be run using command line unless gtk or xwindows is already installed on the server. Will there be any such problems with 2) or 3) while running them server side? Also please suggest any good image processing libraries for this purpose.

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• How to read and modify the colorspace of an image in c#

  - by Matthias

  I'm loading a Bitmap from a jpg file. If the image is not 24bit RGB, I'd like to convert it. The conversion should be fairly fast. The images I'm loading are up to huge (9000*9000 pixel with a compressed size of 40-50MB). How can this be done? Btw: I don't want to use any external libraries if possible. But if you know of an open source utility class performing the most common imaging tasks, I'd be happy to hear about it. Thanks in advance.

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• Why does "enable-shared failed" happen on libjpeg build for os X?

  - by BryanWheelock

  I'm trying to install libjpeg on os X to fix a problem with the Python Imaging Library JPEG setup. I downloaded libjpeg from http://www.ijg.org/files/jpegsrc.v7.tar.gz I then began to setup the config file cp /usr/share/libtool/config.sub . cp /usr/share/libtool/config.guess . ./configure –enable-shared However, the enable-shared flag didn't seem to work. $ ./configure –-enable-shared configure: WARNING: you should use --build, --host, --target configure: WARNING: invalid host type: –-enable-shared checking build system type... Invalid configuration `–-enable-shared': machine `–-enable' not recognized configure: error: /bin/sh ./config.sub –-enable-shared failed I've done lot's of google searches and I can't figure out where the error is or how to work around this error.

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• Sql simple query

  - by Josemalive

  Hello, I have the following table Persons_Companies that shows a relation between persons and companies knowns by these persons: PersonID | CompanyID 1 1 2 1 2 2 3 2 4 2 Imaging that company 1="Google" and company 2 is ="Microsoft", i would like to know the query to have the following result: PersonID | Microsoft | Google 1 0 1 2 1 1 3 1 0 4 1 0 Until this moment i have something similar: select PersonID, case when CompanyID=1 then 1 else 0 end as Google, case when EmpresaID=2 then 1 else 0 end as Microsoft from Persons_Companies My problem is with the persons that knows both companies, i cant imagine how could this query be. Could you give me a hand? Thanks in advance. Best Regards. Josema.

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• Programmatically generate video or animated GIF in Python?

  - by FogleBird

  I have a series of images that I want to create a video from. Ideally I could specify a frame duration for each frame but a fixed frame rate would be fine too. I'm doing this in wxPython, so I can render to a wxDC or I can save the images to files, like PNG. Is there a Python library that will allow me to create either a video (AVI, MPG, etc) or an animated GIF from these frames? Edit: I've already tried PIL and it doesn't seem to work. Can someone correct me with this conclusion or suggest another toolkit? This link seems to backup my conclusion regarding PIL: http://www.somethinkodd.com/oddthinking/2005/12/06/python-imaging-library-pil-and-animated-gifs/

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• c# Bitmap.Save transparancy doesn't save in png

  - by kelton52

  I'm trying to save a Bitmap class that has transparancy as a png file with transparancy. I'm having no luck. The bitmap has transparancy, it just doesn't save with transparancy. this is what I'm doing bitmap setup Bitmap ret = new Bitmap(bWidth, bHeight, System.Drawing.Imaging.PixelFormat.Format32bppArgb); saveing ret.Save(filename, ImageFormat.Png); I also tried saving the file with a filestream, and that made no difference. When the image is in a Picture box the transparancy exists, but when I save i I just get a black background. I really don't want to use any 3rd party code, they found a way to do it, I'd like to also. thanks.

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• How to convert *.aspx (HTML) page to Image format

  - by Swapnil Fegade

  I want to convert *.aspx (HTML) page's (User Interface) to Image such as JPEG. I am using below code for that Protected Sub btnGet_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnGet.Click saveURLToImage("http://google.co.in") End Sub Private Sub saveURLToImage(ByVal url As String) If Not String.IsNullOrEmpty(url) Then Dim content As String = "" Dim webRequest__1 As System.Net.WebRequest = WebRequest.Create(url) Dim webResponse As System.Net.WebResponse = webRequest__1.GetResponse() Dim sr As System.IO.StreamReader = New StreamReader(webResponse.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8")) content = sr.ReadToEnd() 'save to file Dim b As Byte() = Convert.FromBase64String(content) Dim ms As New System.IO.MemoryStream(b, 0, b.Length) Dim img As System.Drawing.Image = System.Drawing.Image.FromStream(ms) img.Save("c:\pic.jpg", System.Drawing.Imaging.ImageFormat.Jpeg) img.Dispose() ms.Close() End If End Sub But I am getting Error as "Invalid character in a Base-64 string" at line Dim b As Byte() = Convert.FromBase64String(content)

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• UITextField with the lookup

  - by leon

  Hello, I would like to achive the same functinoanlity in the UUTextField control as Google search web site (which uses Ajax for this): as user start typing, list of suggestion searches is shown. Then more letteres you type, suggestion list changes. So imaging I have array of words: Apple Abc Aman As user types A, all thress suggesions are shown, if user type one more letter p, then Apple is suggested. How would I do something like this? Mail type of applicatins do it, when receipent name is typed in the To: edit control I guess I can use UITableView with the search, is it correct approach?

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• iPhone Internationalization. What is the simplest workflow for me?

  - by dugla

  Hello, I am wising up and getting my internationalization act together. Right off the bat I am a bit swamped by all the docs Apple provides so I was wondering of someone could sketch a workflow for my situation. Before I begin, I browsed some Apple example code and noticed this NIB file - MainWindow.xib - in the Resources folder: This clearly has something to do with internationalization/localization. Could someone please explain how this is created and where in the workflow it happens? My app is fundamentally an imaging app with a few labels that I currently programmatically internationalize using NSLocalizedString(...). If I set all my labels programmatically and wrap all my strings with NSLocalizedString(...) can I completely ignore the NIB issues? Thanks in advance, Doug

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