What is a picture compression?
Image compression seeks to reduce digital image file size while maintaining image quality. This is achieved by using data compression methods to Te Files. The image size of the image may be reduced with or without the image quality; These are called lossy compression and lossless compression. Image compression is useful when a user desires to minimize the desired storage space or maximize image data transfer speeds.
The first type of image compression is lossy compression. A user who seeks to reduce the size of the image file dramatically may opt for a compression loss method if a certain reduction in image quality is worth a significant reduction in file size. Digital camera images and videos are examples of digital files that are commonly compressed by loss -making methods. The user will not be able to restore the original image because there will be compression artifacts or irreversible changes in the picture.
Simple methodaztrateThe image compression is to reduce the color space to a smaller set of colors. Color spaces can range from only eight different colors to millions of colors. The larger the color space, the more data is needed to determine a particular color. The image conversion to gray or gray shades is a similar technique of compression of image loss.
Lossless image compression is any method of reducing the size of the image file without sacrificing information about the image - an identical image with the original can always be obtained. Lossless forms of data compression are essential if quality reduction is considered unacceptable. Medical imaging, technical drawings and astronomical observations usually use lossless compression techniques.
One method of compression of images without release is called ecoding rund length. Simple images often have many recurring pixels or small points. For exampleThe black background can be black. The method of running the length of the run stores this string of black pixels in two values: one for color and one for the number of pixels in the chain. This method can store the same amount of information with much less data.
A group of JPEG (JPEG) is an example of a method of compression compression with a variable level of compression. JPEG compression usually leaves a certain amount of compression artifacts, but can reduce file size by more than 10 times with only low quality losses. Some JPEG loads a picture with progressively larger details, allowing the user to view the image view while loading. These aspects of JPEG image format were very popular on the World Wide website.