![]() ![]() Lossy Compression Many people feel that they should only use image formats that use lossless compression. GIF can also be used to store simple animated images. We’ve covered the differences between lossless and lossy compression, the different file types and the compression techniques they use, and guidelines for which file formats work best for different kinds of images. GIF is often used where transparency is needed on the graphic. GIF compresses images to a maximum 8-bit colour depth, making it unsuitable for high-quality photographs. JPEG is a lossy format that offers a higher compression rate than PNG in the trade-off for quality. JPEG is often used for digital camera images because it has a fairly small file size for the quality that it displays. It is often used where the graphic might be changed by another person or where the image contains layers of graphics that need to be kept separate from each other. There are a number of types of compressed image file. Lossy compression permanently removes data. There are two types of image compression: lossy and lossless. Its goal is to reduce the number of bits necessary to represent an image. Also, the file can be decompressed to its original quality. Image compression aims to eliminate image data redundancy and irrelevance in order to store or transmit data more efficiently. Lossless compression means that as the file size is compressed, the picture quality remains the same - it does not get worse.
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