Is there a secret JPEG compression setting that compresses more without loss in image quality?
by 
Halliburton Shill
ANSWERS: 4
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If you want a highly compressed image without any loss of quality, you can convert your .jpeg into .png Even the highest quality in .png can be smaller in size than a highly compressed .jpeg image. If you want a software to convert image files, you can find it at www.download.com
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PNG is the greatest file format. Hardly any quality loss & small file sizes. Use any free program to convert them ... many on the marker & FREE :)
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Best bet is png, whenever you compress a jpeg image you lose quality.
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There is the 'lossless mode of operation' of JPEG. There are some lossless compression schemes from the same group which issued JPEG: 'Lossless JPEG is a 1993 addition to JPEG standard by the Joint Photographic Experts Group to enable lossless compression. However, it might be used as an umbrella term to refer to all lossless compression schemes developed by the Joint Photographic Expert group. They include JPEG 2000 and JPEG-LS.' Source: https://en.wikipedia.org/wiki/Lossless_JPEG ---- The JPEG 2000 format was never widely adopted. Further information: 'JPEG 2000: The Better Alternative to JPEG That Never Made it Big' https://petapixel.com/2015/09/12/jpeg-2000-the-better-alternative-to-jpeg-that-never-made-it-big/ --- Maybe you could also try this other, not free alternative: 'JPEGMini's sole purpose in life is to reduce the size of large JPEG image files while retaining, all of the quality. I say nearly, but from my weeks of VERY extensive testing, I've not been able to visibly see any difference between my 100% quality exported images and the JPEGMini optimized ones!' Source: https://photofocus.com/2016/12/10/jpegmini/
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