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  • OpenGL billboard interpolation issue

    - by PeanutPower
    I have a billboard quad with a texture mapped onto it. This is basically some text with transparency. The billboard floats forwards and backwards from the camera's perspective. As the billboard moves away (and appears smaller) there is an flickering effect around the edges of the text where there is a stroke border on the actual texture. I think this is because interpolation is needed as the image which is normally X pixels wide is now shown as only a % of X and some pixels need to be merged together. I guess it's doing nearest neighbour or something? Can anyone point me in the right direction for opengl settings to control this, I'm guessing there is some way of preventing this effect from happening by adjusting the method for how the texture is handled ?

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  • Videoconference using Flash and SIP

    - by Júlio Santos
    The front-end will be Flash, to run in a browser and have access to the camera. I must use SIP to control the sessions. How could I do this? Will a Red5 server and a MjSip sever do the trick? As in i'd use MjSip to setup the session and warn users about calls, and Red5 to stream the video and audio? Any suggestions? Note: only 1-on-1 conference is required.

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  • User permission to make a call

    - by Denis Petau
    There might have been a restriction on originating (making) calls (voice or data) from mobile phones without an explicit user permission i.e. a window would pop-up, asking the user to press 'Yes'/approve or 'No'/cancel for a call attempt made by a software application on that cellphone/mobile. There seems though to exist API for making calls, voice calls and data calls, on various embedded OS like WM, Symbian and Android. Do they require a user button-press then?

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  • Web page width on LG mobile phone

    - by steve
    Hi I'm trying to develop a site for mobile phones. At the moment it seems to work on iphone and android htc desire and an n95. When I try it on an LG renoir instead of the page fitting the width of the screen the page displays at least twice as wide as it should meaning you can scroll left and right. Has anyone come across this before, or knows how to stop it. Warm regards

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  • gluLookAt doesn't work

    - by Tyzak
    hi, i'm programming with opengl and i want to change the camera view: ... void RenderScene() //Zeichenfunktion { glClearColor( 1.0, 0.5, 0.0, 0 ); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); glLoadIdentity (); //1.Form: glBegin( GL_POLYGON ); //polygone glColor3f( 1.0f, 0.0f, 0.0f ); //rot glVertex3f( -0.5, -0.5, -0.5 ); //unten links 3 =3 koords, f=float glColor3f( 0.0f, 0.0f, 1.0f ); //blau glVertex3f( 0.5, -0.5, -0.5 ); //unten rechts glVertex3f( 0.5, 0.5, -0.5 );//oben rechts glVertex3f( -0.5, 0.5, -0.5 );//oben links glEnd(); Wuerfel(0.7); //creates cube with length 0.7 gluLookAt ( 0., 0.3, 1.0, 0., 0.7, 0., 0., 1., 0.); glFlush(); //Buffer leeren } ... when i change the parameter of gluLookAt, nothing happens, what do i wrong? thanks

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  • Dice face value recognition

    - by Jakob Gade
    I’m trying to build a simple application that will recognize the values of two 6-sided dice. I’m looking for some general pointers, or maybe even an open source project. The two dice will be black and white, with white and black pips respectively. Their distance to the camera will always be the same, but their position on the playing surface will be random. (not the best example, the surface will be a different color and the shadows will be gone) I have no prior experience with developing this kind of recognition software, but I would assume the trick is to first isolate the faces by searching for the square profile with a dominating white or black color (the rest of the image, i.e. the table/playing surface, will in distinctly different colors), and then isolate the pips for the count. Shadows will be eliminated by top down lighting. I’m hoping the described scenario is so simple (read: common) it may even be used as an “introductory exercise” for developers working on OCR technologies or similar computer vision challenges.

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  • OpenGL Diffuse Lighting Shader Bug?

    - by anon
    The Orange book, section 16.2, lists implementing diffuse lighting as: void main() { vec3 N = normalize(gl_NormalMatrix * gl_Normal); vec4 V = gl_ModelViewMatrix * gl_vertex; vec3 L = normalize(lightPos - V.xyz); gl_FrontColor = gl_Color * vec4(max(0.0, dot(N, L)); } However, when I run this, the lighting changes when I move my camera. On the other hand, when I change vec3 N = normalize(gl_NormalMatrix * gl_Normal); to vec3 N = normalize(gl_Normal); I get diffuse lighting that works like the fixed pipeline. What is this gl_NormalMatrix, what did removing it do, ... and is this a bug in the orange book ... or am I setting up my OpenGl code improperly?

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  • How to determine the format of Excel file in Java?

    - by Samuh
    I am working on a light weight Java client library for Android mobile platform that can read and write to Excel files in .xls(BIFF) and Office 2003 XML format. No sooner we decided to start than we got stuck with a basic question. How do we determine the format of the excel files in Java? Please help. Thanks.

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  • What's the best way to authorize a USB Key

    - by ScottCate
    We have an auto update for our software that is installed via USB key (with the auto run). If I wanted to ensure that only authorized USB Keys were used, what's the best way? Our installer is already signed, and it won't run otherwise. But I'm more wanting to inspect the USB Key for a signed installer, and if it's not there, just ignore, or even "Eject" the USB device. And I should be able to tell the difference (in code) between a usb storage device, and say a camera, or keyboard. I'm only wanting to disable non-authorized storage devices. Thank you for your ideas.

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  • running Sax parser

    - by apoorva
    Am new to using SAX parser .Can anyone tell me how to run it .and what all are required to run it (jdk )..Can i have a sax parser that can parse both android xml and a normal xml

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  • Creating an Improved Digital Zoom

    - by Kazar
    Hey, Ok, so I have a given video source (for the sake of the example, it is a camera). It does not have optical zoom, but we supply digital zoom instead. Now this digital zoom is pretty simple, simply cropping the image to a specified portion, and filling the screen with that portion. The problem is that the zoomed video can have pretty rubbish quality when the digital zoom is enabled. I am wondering if anyone knows of an approach by which a higher quality of digital zoom can be achieved in real-time. The software is on Windows, and the video is rendered using DirectShow, but it isn't a platform solution I'm necessarily after, more just a better approach to the problem. Cheers

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  • Finding distance travelled by robot using Optical Flow

    - by user280454
    Hi, I'm working on a project right now in which we are developing an autonomous robot. I have to basically find out the distance travelled by the robot between any 2 intervals. I'm using OpenCV, and using the Optical Flow functions of OpenCV, I'm able to find out the velocity/distance of each pixel in 2 different images. Using this information, I want to be able to find out the distance travelled by the robot in the interval between those 2 images. I thought of a way in which we could develop an input output mapping between the distance travelled by pixels and the distance travelled by the bot (using some tests). In this way, using neural networks, we would be able to find the relationship. However, the optical flow would depend on the distance of the camera from the pixel, which would cause problems. Is there any way to solve this problem?

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  • Can an iPhone/iPod Touch application open a port for remote communication without jailbreaking?

    - by Derrick
    I'm researching remote control testing for an app that'll be installed on the new iPod Touch and can't tell for certain from everything that I've read whether or not an installed app can or can't open any ports for remote test instructions (that's a mouthful : ) We created something like this for the Android using adb port forwarding and telnet, and it worked really well. Is there any chance something similar could be done on an iPhone or iPod without jailbreaking??

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  • Is Google Analytics for Mobile available for Windows Mobile / Compact Framework

    - by Michal Drozdowicz
    Recently Google introduced an SDK for application usage tracking on mobile devices (Google Analytics for Mobile Apps). Unfortunately, it seems that it only supports IPhone and Android devices. Do you have any idea if this framework can somehow be used from Windows Mobile / Compact Framework applications or if Google is planning to release an SDK for WM? BTW, I don't mean a WM application for browsing through GA server reports, but an SDK for tracking your mobile app's usage.

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  • Preserve time stamp when shrinking an image

    - by Ckhrysze
    My digital camera takes pictures with a very high resolution, and I have a PIL script to shrink them to 800x600 (or 600x800). However, it would be nice for the resultant file to retain the original timestamp. I noticed in the docs that I can use a File object instead of a name in PIL's image save method, but I don't know if that will help or not. My code is basically name, ext = os.path.splitext(filename) # open an image file (.bmp,.jpg,.png,.gif) you have in the working folder image = Image.open(filename) width = 800 height = 600 w, h = image.size if h > w: width = 600 height = 800 name = name + ".jpg" shunken = image.resize((width, height), Image.ANTIALIAS) shunken.save(name) Thank you for any help you can give!

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  • Emulator typing "="

    - by Anton
    Hello. I have a problem with Android Emulator. I have created avd and run it. But when it was started I can't work, because it emulate typing many "=" symbol. I launch this avd with -debug-all parameter and debuger write "could not handle (sym=61, mod=0, str=EQUAL) KEY [0x00d, down]". OS - Windows Vista. Last version Java platform, SDK, Eclipse. Thank you very mach if you can hep me =)

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  • SDK for writing DVD's

    - by Matt Warren
    I need to add DVD writing functionality to an application I'm working on. However it needs to be able to write out files that are being grabbed "live" from a camera, over a long period of time. I can't wait until all the files are captured before I start writing them to the DVD, I need to write them out in chunks as I go along. I've looked at IMAPI v2, but the main problems seems to be that you need to point it to all the files you plan to write out to disk before you start the burning process. I know it has to concept of "sessions", which means you can write to the DVD in several parts, before you finally "close" it. But I was wondering if there were any other DVD writing SDK's that allow you to be constantly writing files to a DVD and in particular files that are only in memory. It would be more efficient if I didn't have to write the captured images out to hard before they are burned to DVD. The solution needs to work under .NET on Windows XP and vista

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  • Database solutions for storing/searching EXIF data

    - by webdestroya
    I have thousands of photos on my site (each with a numeric PhotoID) and I have EXIF data (photos can have different EXIF tags as well). I want to be able to store the data effectively and search it. Some photos have more EXIF data than others, some have the same, so on.. Basically, I want to be able to query say 'Select all photos that have a GPS location' or 'All photos with a specific camera' I can't use MySQL (tried it, it doesn't work). I thought about Cassandra, but I don't think it lets me query on fields. I looked at SimpleDB, but I would rather: not pay for the system, and I want to be able to run more advanced queries on the data. Also, I use PHP and Linux, so it would be awesome if it could interface nicely to PHP. Any ideas?

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  • Vbscript / webcam. using flash API - Save streaming file as image

    - by remi
    Hi. Based on a php app we've tried to developp our own webapp in vbscript. All is working well. The camera starts, etc.. The problem we're left with is the following: the flash API is streaming the content of the video to a webpage, this page saves the photo as a jpg. The PHP code we're trying to emulate is as follow $str = file_get_contents("php://input"); file_put_contents("/tmp/upload.jpg", pack("H*", $str)); After intensive googling the best we can come up with is Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Dim sImagePath As String = Server.MapPath("/registration/") & "test.jpg" Dim data As Byte() = Request.BinaryRead(Request.TotalBytes) Dim Ret As Array Dim imgbmp As New System.Drawing.Bitmap("test.jpg") Dim ms As MemoryStream = New MemoryStream(data) imgbmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg) Ret = ms.ToArray() Dim fs As New FileStream(sImagePath, FileMode.Create, FileAccess.Write) fs.Write(Ret, 0, Ret.Length) fs.Flush() fs.Close() End Sub which is not working, does anybody have any suggestion?

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  • How to search on project hosting sites

    - by Stan
    Say I want to look for open source iphone/Android tower defense game on sourceforge/google code/git hub. Directly searching by these keywords seems not easily getting desired result. Is there any way to search project on these sites? Thanks.

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