Color histogram
![A picture of a cat](/Images/godic/202501/05/Odd-eyed_cat_by_ihasb33r4940.jpg")
![A picture of a cat reduced to 256 colors in the RGB color space](/Images/godic/202501/05/Odd-eyed_cat_by_ihasb33r-24940.gif")
![](/Images/godic/202501/05/Symcamera14940.jpg")
![](/Images/godic/202501/05/Symcamera24940.jpg")
In image processing and photography, a color histogram is a representation of the distribution of colors in an image. For digital images, a color histogram represents the number of pixels that have colors in each of a fixed list of color ranges, that span the image's color space, the set of all possible colors.