rgb

I'm trying to send a 2D array of RGB values to PHP from the array of values from the getImageData().data method: for (var i=0;i<imgData.data.length;i+=4){ // If you want to know the values of the pixel var r = imgData.data[i + 0]; var g = imgData.data[i + 1]; var b = imgData.data[i + 2]; var a = imgData.data[i + 3]; //[...] do what you want with these values } From this, how would I create a 2D array of RGB values of an entire canvas? var rgb = []; for (var i=0;i<imgData.data.length;i+=4){ // If you want to know the values of the pixel var r = imgData.data[i + 0]; var g = imgData.data[i + 1];

I'm trying to generate a rainbow with 15 different colors with ( runnable code here ): size(360,100); colorMode(HSB, 360, 100, 100); // Hue in degrees in [0, 360], // saturation/brightness in [0, 100] // like in Photoshop noStroke(); for (int i = 0; i < 15; i++) { fill(i*24, 100, 100); // 24*15 = 360 rect(i*24, 0, 25, 100); } but it doesn't produce a rich 15 rainbow-color palette, instead some colors are missing (vivid yellow for example). Is there a well known algorithm to produce a vivid rainbow color palette? To understand what's going on, try creating a program that shows a line for each

I use tesseract library for android to capture certain text from an image. I know that the captured image is not saved anywhere, it gets recycled. I need to find the original colored bitmap. I have been trying to locate the original colored bitmap, but all I could find was a grayscaled bitmap: Bitmap bitmap = activity.getCameraManager().buildLuminanceSource(data, width, height).renderCroppedGreyscaleBitmap(); When I save this bitmap to the sdcard, I get a gray scaled image. renderCroppedGreyscaleBitmap() method is as follows: public Bitmap renderCroppedGreyscaleBitmap() { int width = getWidth(

I am currently trying to develop a video player on Android, but am struggling with color formats. Context: I extract and decode a video through the standard combinaison of MediaExtractor/MediaCodec . Because I need the extracted frames to be available as OpenGLES textures (RGB) , I setup my decoder ( MediaCodec ) so that it feeds an external GLES texture ( GL_TEXTURE_EXTERNAL_OES ) through a SurfaceTexture. I know the data output by my HW decoder is in the NV12 ( YUV420SemiPlanar ) format, and I need to convert it to RGB by rendering it (with a fragment shader doing the conversion). MediaCodec

I want to plot m*n matrix, each element of which is an rgb triple, like in the following gnuplot code snippet (rgb matrix of 3*3 ): $cross << EODcross 255 0 0 0 0 0 255 0 0 0 0 0 0 0 0 0 0 0 255 0 0 0 0 0 255 0 0 EODcross Black cross on red background. I can change delimiters between columns and color components, if needed. Can I achieve the desired avoiding set palette rgbformulae i,j,k and directly using $cross data? Something like: plot '$cross' matrix with image rgb If not, I can pass 24bit-wide integers (of course, in textual representation, i.e. precalculated and converted to text r +