lossless jpeg operations

[ramalama]

hello

what kind of lossless operations are imagemagick able to perform on a jpeg image?

for instance, how would you do the following without recompressing the image data

- remove meta data
- rotate/flip the image
- crop the image by factors of 8

thanks in advance!

[anthony]

NONE.

IM is a general image processor it always reading in all the data.

For JPEG look at the program 'jhead'. Google for it.

[ramalama]

i am already familiar with jhead. thanks!