Figure 1. The example of grayscale image

 

Not only in the result of image that is printed on the paper, in the digital area there are image that only provide no colour or known as greyscale image. The greyscale image (see Figure 1) can be realized by composing on each pixel with the difference of white levels. The low level of the greyscale image especially on the pixel scale means the dark level or will appear as black color, otherwise, the high level of the greyscale will make the image appear as white. In the digital image, for each pixel of the greyscale image, it is represented in an integer number with the level ranging from 0 to 255. 0 means black and 255 means white. This integer number can also be represented in binary number with the amount of 8 bit. The number of 0 can be represented starting from the binary number of 0b00000000 until the maximum level number is 255, or it can be represented in binary number as 0b11111111. The prefix of 0b means as binary number format. The greyscale image in the digital domain is defined as array data with length of the matrix is arranged by 2 dimensions array.

Resource : https://keylens.blogspot.com/2024/10/greyscale-image-computer-vision.html