General image storage format description

General image storage format description
Image Storage is generally divided into bitmap and vector graph.
Bitmap (raster graphics) is an image represented by a pixel array. The color information of each pixel is represented by an RGB combination or a gray value. The data bits required for color information are divided into 1, 4, 8, 16, 24, and 32 bits. The higher the number of BITs, the richer the color, and the larger the corresponding data volume. One-Bit Bitmap represents a pixel color. Because a data bit can only represent two colors, it is also called a binary bitmap. A 24-bit RGB bitmap is usually called a true color bitmap.
Vector Graphics represent images in computer graphics using geometric elements such as points, straight lines, or polygon based on mathematical equations. The loss map can be infinitely enlarged without distortion.
GIF (Graphics Interchange Format) format: It is a bitmap graphics file format, which is actually a compressed file, using LZW CompressionAlgorithmThis effectively reduces the time for image files to be transmitted over the network. It adopts lossless compression technology. As long as the image is no more than 256 colors, the file size can be reduced and the imaging quality can be maintained.
Features: an excellent compression algorithm ensures image quality to a certain extent while making the size small.
Multiple frames can be inserted to achieve the animation effect.
You can set transparent colors to produce the effects of objects on the background.
JPEG (joint photographic Experts Group) format: It is a lossy compression standard that is widely used for photo images.
PNG (Portable Network Graphics) format: It is a lossless compressed bitmap format that supports three color schemes: Index, gray level, RGB [a], and alpha channel. The development goal of PNG is to improve and replace GIF as a suitable format for network transmission without patent license, so it is widely used in the internet and other aspects.
Features: supports the 256-color palette technology to generate small-size files
Supports up to 48 real color images and 16 gray images.
Supports transparent/translucent features of Alpha channels.
Gamma calibration information of image brightness is supported.
Additional text information can be stored to retain the image name, author, copyright, creation time, comments, and other information.
Use lossless compression.
It is applicable to quick display of the preview effect during network transmission and stream reading and writing.
Use CRC to prevent file errors.
The latest PNG standard allows you to store multiple images in one file.
Tiff (tagimage File Format) Format : Tiff is a flexible and adaptive file format. By using tags in the file header, it can process multiple images and data in a file.Lossless compression.
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