Image pattern classification and its characteristics in photoshop

Bitmap-that is, black-and-white image. After being converted into a bitmap, the image has only two colors, black and white, and only one channel (its feature is used in early newspaper printing, "black and white newspaper").

Gray scale-single channel mode, changing from white-gray-black ***256 gray scale (for ordinary gray scale printing)

Two-color-single channel mode (one spot color ink is generated by customizing the ratio of four inks, and the cost can be reduced by using two colors to realize spot color printing)

Index color-single channel 256-color mode (index is often used in web pages, but not all, only when there are needs such as small pictures, small LOGO, small buttons, animation, transparency, etc. If the true color photos are indexed, the quality is not good, and the capacity is still large. Indexed color is saved in GIF format, and GIF supports animation).

8-bit RGB-commonly known as "24-bit true color image" 8-bit refers to the depth of 8 bits per channel. Isn't RGB three channels? 3*8=24 bits, and each channel has 256 gray levels. For example, if there are 256 levels of red in red, then RGB reproduces 256 * 256 =16.78 million colors.

16 bits-refers to jumping from 8 bits per channel to 16 bits. Needless to say, it is so detailed, at least we can know that there are more layers of colors, and the copied colors will be wider.

32 bits-Similarly, movies generally use 32 bits, and the film of movies is also 32 bits, so this is why the texture of movies is much better than some TVs.