Computer Vision with OpenCV 3 and Qt5

Colors and color spaces

Simply put, a color space is a model used to represent the color values of the pixels in an image. Strictly speaking, a color in computer vision consists of one or more numeric values, each corresponding to a channel, speaking in terms of the OpenCV Mat class. Thus, the color space is the model that defines how these numeric value (or values) are translated into colors. Let's take an example case to better understand this. One of the most popular color spaces (sometimes also referred to as image format, especially in Qt framework) is the RGB color space, in which a color is made out of a combination of red, green, and blue colors. RGB color space is widely used by TVs, monitors, LCDs, and similar display screens. Another ...