Audiophiles deride MP3 because they feel the nuances of an original recording are lost through the process of stripping out these frequencies to save filesize, and similarly artists and designers don’t like what JPEG does to their images when high compression is applied. MP3 compression (opens in new tab) works in a similar way to JPEG image compression, removing information from frequencies that the human ear is less likely to be be able to perceive. If you over-compress using JPEG, the effect is a patchwork, blocky image. As a result, although it may not be immediately obvious until you compare the original to the compressed version, information is lost. This is a pretty sophisticated mathematical process, but in simple terms colour information is removed, along with subtle changes in brightness, centered on the areas where these changes will be least perceptible to the human eye. JPEG image compression (opens in new tab), for example, splits the image into a patchwork of blocks, applying compression to each block using a discrete cosine transform operation. The overarching principle is the same regardless of which format you’re using, but different formats use different systems to analyze the file and notate or generate patterns. ![]() ![]() JPEG image compression splits the images into a patchwork of blocks
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |