How to set given channel of a cv::Mat to a given value efficiently without changing other channels? For example, I want to set its fourth channel (alpha channel) value to 120 (i.e. half transparent...

I have been working on webcam streaming for video and photo capture on Android devices within Unity3D. Most of the examples I have found in order to capture webcam feeds use a specific WebCamTextur...

There are various ways of reading an image file in java such as BufferedImage and ImageIcon to name a few. I want to know what is the difference between these cases? Are they context dependent that...

It's possible to access the alpha channel of a given bitmap with extractAlpha(), but I haven't been able to find any way to actually set the alpha channel of a bitmap. How can multiple greyscale ...