getpixel – Tarik Billa

OpenCV get pixel channel value from Mat image

July 28, 2023 by Tarik

Assuming the type is CV_8UC3 you would do this: for(int i = 0; i < foo.rows; i++) { for(int j = 0; j < foo.cols; j++) { Vec3b bgrPixel = foo.at<Vec3b>(i, j); // do something with BGR values… } } Here is the documentation for Vec3b. Also, don’t forget OpenCV stores things internally as BGR … Read more

C# – Faster Alternatives to SetPixel and GetPixel for Bitmaps for Windows Forms App

March 28, 2023 by Tarik

The immediately usable code public class DirectBitmap : IDisposable { public Bitmap Bitmap { get; private set; } public Int32[] Bits { get; private set; } public bool Disposed { get; private set; } public int Height { get; private set; } public int Width { get; private set; } protected GCHandle BitsHandle { get; … Read more