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• scaling an image, but keep its proportions

  - by mrblah

  I want to scale images, but I don't want the image to look skewed. The image has to be 115x115 (length x width). The image can't be over 115 pixels high (length), but if needed, the width can be less than 115 but not more. Is this tricky?

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• Mouse pointer plug in

  - by user171523

  I am developing a website where i am using CSS based layouts with absoulate positions. I would like to know is there any plug in for IE 8 which will tell based on the mouse where i am moving with the position (In Pixels). I want to know with out any JS. I am looking is there any external plug in which will allow me to find out the position.

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• How to have a transparent number on top of a winform?

  - by Joan Venge

  So I have a winform that has some winforms controls on it. But in the center of it, I want to show a transparent number on top of everything. Say 60 pixels size. I tried a label and even tried to create a custom control but the transparency didn't work. Any ideas how to do this? This number will change programmatically at runtime several times.

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• Convet from line points to shape points

  - by VOX

  I have an array of points that make up a line. However I need to draw the line with the width of n pixels. How can I transform that points for lines to points for polygon (or a shape) so I can directly draw it on canvas. I'm developing two program at the same time, one is j2me and another is .NET CF. j2me doesn't support drawing lines with width. Please take a look at the picture. link text

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• mfc, can any one help with an algorithm for airbrush, i just can't understand how to do it....

  - by Erez

  Hi all, Is there any way to fill an ellipse or a rect by point to point like in an airbrush tool in mspaint? I could not find a way to create an empty rect or an ellipse and then fill them up pixel by pixel or setting random pixels on screen in a circle way.... Can i tell setPixel to fill inside a dcellipse or anything like that? 10x

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• UIImageView dimensions not what I set in IB

  - by Brenden

  I set a UIImageView to 70x70 pixels. In the actual view they look 70px high and 30 wide. This is when there is no source UIImage set and with a background color so I can see it's layout. However, when I do set a UIImage to it the layout does not change, remains portrait. Is there something I am overlooking that affects the layout dimensions of a UIImage or UIImageView? Thanks.

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• Color separation in OpenCV?

  - by user225626

  Is there a function or a series of function steps that roughly equate to... get every pixel from myInput which doesn't meet an arbitrary Green quantity threshhold set each of those pixels to black on myOutput Thanks for any assistance.

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• How to tile a 30000 x 6000 image for a 480 x 320 screen?

  - by Horace Ho

  (this is related to another question about implementation on iPhone) I have a large image, size around 30000 (w) x 6000 (h) pixels. You may consider it's like a big map. I assume I need to crop it up into smaller tiles. Questions: what is the tile strategy? Requirements: whole image (though cropped) can be scrolled up/down/left/right by swipes zoom in (up to pixel-to-pixel) out (down to screen-fit-by-height) by the 2-finger operation memory efficiency by lazy loading tiles Thanks!

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• How to use Delphi 2010's new WIC capability on Canon files?

  - by user257188

  Does anyone know of some sample code that shows how Delphi 2010 can read RAW files using its new COM interface to WIC? I want to read Canon RAW images and then access specific pixels...

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• optimizing widget painting.

  - by yan bellavance

  I am painting a widget and I want to optimize the process. Basically i will be sliding the image in the x direction and I only want to fill the newly exposed area. Is there a way to translate the pixels of a widget without calling update or using paintevent? I know of pixmaps and such but I am wondering If I can for example draw a pixmap once and then translate what I have drawn without having to paint anything else or draw pixmaps anymore.

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• Embedded WMP control - how to get resolution of current playing file?

  - by Roey

  Hi All. I have a Windows Media Player control embedded inside my webpage, I feed it some URL to stream from (ASF file). How can I get from the WMP control the resolution in pixels of the file being played? Thanks Roey

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• display of a chart within a panel

  - by shashank

  hi!i am trying to display a chart within a panel such that i need to divide the chart into 2 halves...the line in the middle is a reference line from where i need to take 30 pixels above and below...plz help

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• Paperclip Resize to fit a rectangular box

  - by astropanic

  I have a rectangular image for example 30x800 pixels How I can scale it with paperclip to preserve the aspect ratio to a 100x100 pixel image with borders filling the empty area ? an example : http://www.imagemagick.org/Usage/thumbnails/pad_extent.gif

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• mfc, can any one help with an algorithem for airbrush, i just can't understand how to do it....

  - by Erez

  Hi all, Is there any way to fill an ellipse or a rect by point to point like in an airbrush tool in mspaint? I could not find a way to creat an empty rect or an ellipse and then fill them up pixel by pixel or setting rundom pixels on screan in a circle way.... Can i tell setPixel to fill inside a dcellipse or anything like that? 10x

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• Matrix "Zigzag" Reordering

  - by fbrereto

  I have an NxM matrix in Matlab that I would like to reorder in similar fashion to the way JPEG reorders its subblock pixels: (referenced from here) I would like the algorithm to be generic such that I can pass in a 2D matrix with any dimensions. I am a C++ programmer by trade and am very tempted to write an old school loop to accomplish this, but I suspect there is a better way to do it in Matlab.

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• Play sound when UIScrollView is scrolling

  - by Chonch

  Hey, I have a scroll view that can be scrolled to the sides (only left and right, not up and down). I want to play a short sound (less than a second) whenever the scroll view is moved X pixels to either side. How can this be done? Code samples will be greatly appreciated... Thanks,

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• image processing with matlab

  - by wamp

  It's from this thread but I'm also interested in this. How to I filter out pixels not in green channel? And how to I select a point which is inside a closed box with MATLAB?

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• How can I use a PathGeometry as a mask for a BitmapSource (or any image data)?

  - by Jedidja

  Assuming I have a BitmapSource (actually I have access to the raw pixels as well if necessary), how can I use a PathGeometry as a mask to cut out certain parts of the image? 01234567890123456789 0 -------------------- 1 | + + | 2 | * | 3 | * ) | 4 | * | 5 | ( | 6 -------------------- Assuming I have a PathGeometry that describes a rectangle that goes from (0, 0) to (8, 3), I would like to be able to get one of the following two images: 01234567890123456789 0 -------------------- 1 | + | 2 | * | 3 | | 4 | | 5 | | 6 -------------------- or 012345678 0 --------- 1 | + | 2 | *| 3 ---------

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• Is there an equivalence of MapRGB for a BufferedImage in Java?

  - by SDLFunTimes

  I'm trying to color individual pixels on a BufferedImage (TYPE_INT_RGB) using setRGB but I'm not for sure how to set format the RGB values I want as a single integer. Is there a method that will take 3 ints (RGB values) and return a correctly formatted integer for setRGB?

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• The simplest way to resize an UIImage ?

  - by micropsari

  Hello ! In my iPhone app, I take a picture with the camera, then I want to resize it to 290*390 pixels. I was using this method to resize the image : UIImage *newImage = [image _imageScaledToSize:CGSizeMake(290, 390) interpolationQuality:1]; It works perfectly, but it's an undocumented function, so I can't use it anymore with iPhone OS4. So... what is the simplest way to resize an UIImage ? Thanks !

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• Percentage of white pixel

  - by AZIRAR

  After performing processing I want to calculate the percentage of white pixels between this images after the change. I'm doing this: var = (int2str(nnz(Img2)) / int2str(nnz(Img1))) * 100; but it returns as result ] What's the problem ?

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• On OSX, how do I gradient fill a path stroke?

  - by Emiel

  Using the plethora of drawing functions in Cocoa or Quartz it's rather easy to draw paths, and fill them using a gradient. I can't seem to find an acceptable way however, to 'stroke'-draw a path with a line width of a few pixels and fill this stroke using a gradient. How is this done?

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• IE6 and IE7 Input padding CSS

  - by Podlsk

  I have input boxes with a height of 25 pixels. In Firefox, Safari and IE8 automatically vertically align the text of it in the middle correctly. However in IE6 and IE7 the text is aligned to the top. How may I resolve this? Adding padding-top increased the total height of the input as I have explicitly declared its height. I don't wish to use browser specific CSS. Thanks.

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• Scraping data from Flash (Games)

  - by awegawef

  I saw this video, and I am really curious how it was performed. Does anyone have any ideas? My intuition is that he scraped pixels from the screen (one per 'box'), and then fed that into some program to determine the next move. Is scraping pixel-by-pixel the way to do this, or is there a better way? I am looking to do something similar with either Java or Python. Thanks

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• Is displayMetrix xdpi and ydpi accurate?

  - by oddvark

  Can the xdpi and ydpi settings be relied upon to accurately represent the physical pixels in once inch of screen space? I need this to be accurate for some display code I'm writing. I realize the documention says that this is the case, but I need to know if individual handsets get this right MOST OF THE TIME. I know I can alternately use "densitiy" which will give me 120, 160, 240 steps of DPI, but an exact dpi would be much better. Thanks!

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