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38 lines
1.3 KiB
Plaintext
38 lines
1.3 KiB
Plaintext
---
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syntax: markdown
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tags: [tldr, linux]
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source: https://github.com/tldr-pages/tldr.git
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---
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# jpegtran
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> Perform lossless transformation of JPEG files.
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> More information: <https://manned.org/jpegtran>.
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- Mirror an image horizontally or vertically:
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`jpegtran {{[-f|-flip]}} {{horizontal|vertical}} {{path/to/image.jpg}} > {{path/to/output.jpg}}`
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- Rotate an image 90, 180, or 270 degrees clockwise:
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`jpegtran {{[-ro|-rotate]}} {{90|180|270}} {{path/to/image.jpg}} > {{path/to/output.jpg}}`
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- Transpose the image across the upper-left to lower right axis:
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`jpegtran -transpose {{path/to/image.jpg}} > {{path/to/output.jpg}}`
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- Transverse the image across the upper right to lower left axis:
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`jpegtran -transverse {{path/to/image.jpg}} > {{path/to/output.jpg}}`
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- Convert the image to grayscale:
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`jpegtran {{[-g|-grayscale]}} {{path/to/image.jpg}} > {{path/to/output.jpg}}`
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- Crop the image to a rectangular region of width `W` and height `H` from the upper-left corner, saving the output to a specific file:
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`jpegtran -crop {{W}}x{{H}} -outfile {{path/to/output.jpg}} {{path/to/image.jpg}}`
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- Crop the image to a rectangular region of width `W` and height `H`, starting at point `X` and `Y` from the upper-left corner:
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`jpegtran -crop {{W}}x{{H}}+{{X}}+{{Y}} {{path/to/image.jpg}} > {{path/to/output.jpg}}`
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