Why OpenCV Using BGR Colour Space Instead of RGB

Question

Can any one explain why OpenCV using BGR colour space instead of RGB. We all know that RGB is the convenient colour model

Answer 1

OpenCV reads in images in BGR format (instead of RGB) because when OpenCV was first being developed, BGR color format was popular among camera manufacturers and image software providers. The red channel was considered one of the least important color channels, so was listed last, and many bitmaps use BGR format for image storage. However, now the standard has changed and most image software and cameras use RGB format, which is why, in programs, it's good practice to initially convert BGR images to RGB before analyzing or manipulating any images.