Is the larger the gray value black or white?

0 is black and 255 is white. The differences between gray-scale images and color images are: different compositions, different channels and different forms of expression.

First, the composition is different.

1, grayscale image: grayscale image is an image that represents the logarithmic relationship between white and black with grayscale.

2. Color map: A color map is an image in which each pixel consists of R, G and B components.

Second, the channels are different.

1. Hall grayscale image: The grayscale image has only one single grayscale channel.

2. Color map: A color map has multiple superimposed color channels.

Gray value: Due to the different colors and brightness of each point in the scene, each point in the black-and-white photo taken or the black-and-white image reproduced by the TV receiver appears gray in different degrees.

White and black are divided into several levels according to logarithmic relationship, which is called "gray scale". The general range is 0 to 255, white is 255, and black is 0, so black and white pictures are also called gray-scale images, which are widely used in medical and image recognition fields.