![]() ![]() The second channel has the deviation of the red channel from the average brightness, and in the third channel, the deviation of the blue channel. Rather than storing an image as the RGB color values, JPEG uses YCbCr, which is 3 channels: The first channel stores the pure brightness information (Y), so the average of the brightness of the red, blue and green channel. The JPEG algorithm is designed to exploit certain properties of our eyes, namely, that we are more sensitive to slow changes of brightness and color than we are to rapid changes over a short distance. The JPEG compression algorithm was designed for compressing either full-color or gray-scale images of natural, real-world scenes, and therefore is best suited for continuous tone images like photographs or natural artwork and not sharp-edged or flat-color art like lettering, simple cartoons, or line drawings. Now why your specific image looks bad: The color red. Pretty much every "image hosting" aspect of major websites do this, for example Instagram or Facebook both re-size and re-compress all uploaded images. Even if you "pre-resized" your cover art to 300px by 300px, it would still re-compress the image to save server space. ![]() That way, they only have to store the image at the largest size it'll ever get displayed (300px by 300px), which over the millions of playlists with custom covers, ends up saving them tons of server storage space. ![]() ![]() It has nothing to do with the size you're uploading the image at, but actually the color of the cover art.įirst off, no matter what, any cover art you upload gets automatically resized down and compressed by Spotify. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |