Why Compress Images?
Images are much larger in size and hence take up a larger bandwidth and longer time for uploads and downloads. This has raised the necessity of compressing the digital images before upload or download. Digital Image Compression is a technique used for reducing the size of digital images. Digital Image Compression also helps in reducing the storage space required by an image file. Digital Image Compression is especially useful for high resolution images and images containing colors since they are larger in size.
Digital Image Compression Techniques
Digital Image Compression compresses and reduces the size of images by use of various algorithms and standards. Two of the common Digital Image Compression Techniques are lossless compression and lossy compression. The lossless compression technique, as the name indicates, produces no loss in the quality of image. This technique is used in places where the quality and accuracy of image is extremely important and cannot be compromised on. Some of the examples are technical drawings, medical images etc. Lossy compression technique is one which produces a minor loss of quality to the output image. This minor loss is almost invisible and hard to identify. This technique finds use where minor alteration or loss of quality causes no problem like in photographs. There are different methods and algorithms used in lossless and lossy compression.
Applications of Digital Image Compression
Digital Image Compression has numerous applications which range from image compression for personal use to compressing more crucial images like medical images. Digital Image Compression helps in saving a lot of memory space and hence is extensively used for compression of photographs, technical drawings, medical imaging, artworks, maps etc. Images reduced in size by Digital Image Compression can be sent, uploaded or downloaded in much lesser time and thus it makes sharing of images lot easier.