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Difference between JPEG and PNG
JPEG
JPEG – Joint Photographic Experts Group is a standardized image compression mechanism. JPEG files can be relatively small in size, but they still look crisp and beautiful. Jpeg image format supports up to 16.7 million colors, which makes them the right choice for complex images. It works well on photographs, naturalistic artwork, and similar materials. JPEG is “lossy”, meaning that the image you get out of decompression isn’t quite identical to what you originally put in. The algorithm achieves much of its compression by exploiting known limitation of the human eye, notably the fact that small color details aren’t perceived as well as small details of light-and-dark. Thus, JPEG is intended for compressing images that will be looked at by humans.
With the wide range of colors, you can have beautiful imagery without a bulky file size. With new responsive techniques, you can also have flexible images without large loading times. For good-quality, full-color source images, the default quality setting (Q 75) is very often the best choice. Try Q 75 first, if you see defects, then go up with it.
PNG
PNG – Portable Network Graphics format is superior to GIF in that it has better compression and supports millions of colors. PNG files end in a .png suffix. Designers need the ability to incorporate low-resolution images that load quickly but also look great, too. This is where PNG image format introduced. PNG-8 does not support transparency, but PNG-24 and PNG-32 do. PNG transparency is different from Gif transparency, because they can have different levels of transparency.
PNG files are tight, which means that they do not lose quality during editing. This is unlike jpegs, where they lose quality. PNG files tend to be larger than jpegs, because they contain more information. But PNG files do not support animation.
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