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10.4: About Preview and rotated/mirrored images
In Preview, save the rotated JPEG file in a nondestructive format, like PNG. The pixels will be rotated, and there will be no loss of quality. Then save the PNG file as JPEG if you need higher (lossy) compression.
10.4: TIFF is nondestructive
TIFF is a safer choice than PNG. PNG does use lossy compression.
10.4: TIFF is nondestructive
According to this link, png is lossless.
10.4: TIFF is nondestructive
Actually it doesn't. PNG *always* uses lossless compression and has a much simpler specification than TIFF since it can't be used as a container for all kinds of weird things (although current Tiff libs got better at handling weird file nowadays). So PNG is usually a much better choice especially when portability is a factor.
10.4: About Preview and rotated/mirrored images
Unfortunately PNG and TIFF are much larger file formats than jpg, which is compressed. To get back to jpg after going through one of these formats would require losing data through re-compression. |
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