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jpegtran
Perform lossless transformation of JPEG files. More information: https://linux.die.net/man/1/jpegtran.
- Mirror an image horizontally or vertically:
jpegtran -flip {{horizontal|vertical}} {{path/to/image.jpg}} > {{path/to/output.jpg}}
- Rotate an image 90, 180 or 270 degrees clockwise:
jpegtran -rotate {{90|180|270}} {{path/to/image.jpg}} > {{path/to/output.jpg}}
- Transpose the image across the upper left to lower right axis:
jpegtran -transpose {{path/to/image.jpg}} > {{path/to/output.jpg}}
- Transverse the image across the upper right to lower left axis:
jpegtran -transverse {{path/to/image.jpg}} > {{path/to/output.jpg}}
- Convert the image to grayscale:
jpegtran -grayscale {{path/to/image.jpg}} > {{path/to/output.jpg}}
- Crop the image to a rectangular region of width
W
and heightH
from the upper left corner, saving the output to a specific file:
jpegtran -crop {{W}}x{{H}} -outfile {{path/to/output.jpg}} {{path/to/image.jpg}}
- Crop the image to a rectangular region of width
W
and heightH
, starting at pointX
andY
from the upper left corner:
jpegtran -crop {{W}}x{{H}}+{{X}}+{{Y}} {{path/to/image.jpg}} > {{path/to/output.jpg}}
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