However, when you're compressing an image that is solid red that immediately changes to white, as in your cover art where the red background and the white text meet to create a hard edge, that creates the strong compression artifacts (which you call blurriness.) In a photograph, that resolution reduction of the red color is barely perceptible, especially since it gets "hidden" behind the blue channel and the luminance channel.
(The value for the green channel can be calculated from this and does not need to be specially stored.) Once you have separated the components luminance (brightness) and chrominance (color), you can reduce the resolution of the two chrominance channels to half or a quarter, as they do not matter for the image's sharpness.Īt higher compression levels in JPEG, that red channel gets a significantly reduced resolution. 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 shows the delicate balancing act digital services generally – music DSPs included – have to walk.Deeper personalisation brings new ways to discover and share music, but it also reminds people how much data these companies are collecting on their listening habits.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. Listeners will have fun, although not everyone is a fan of Spotify’s new feature: “ a glaring reminder of its emotional surveillance” was Gizmodo’s take for example. Its her only 80s album without questionable deep cuts IMO and her only 80s album in which the singles. There is also a new feature called ‘Blend’ that lets two friends create a joint playlist, which Spotify’s algorithm will populate with songs that combine their listening tastes. The new section can be found within Spotify’s app or on a dedicated microsite, with listeners shown data on the artists and genres that they listen to, and new personalised playlists accompanying it. The idea is to take the annual ‘Wrapped’ Christmas promotion, and make something like it available throughout the year. Spotify is launching a new hub on its service, called ‘ Only You’, which doubles down on its personalised playlists and podcast recommendations.
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