25 lines
1.2 KiB
Markdown
25 lines
1.2 KiB
Markdown
# imageoptimizer
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imageoptimizer is a tool for bulk compression og JPG images. It will re-compress original images and replace them if the savings is
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more than the requested percentage difference and optionally if the original file is bigger than a cefrtain size. By default it operates in a "dry run" mode where images are not replaced but individual and total savings are reported at the end, unless you supply the '-replace' flag.
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# why?
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Poorly optimized images in most contexts waste space and bandwidth unnecessarily. JPEG compression was designed to highly optimize photos with
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little or no visually identifiable differences in default conditions, and for scenarios where absolute quality is less important it can compress
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even farther. Generally quality levels below 75 are where you start to notice a difference.
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# usage
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Recursively check all images starting from the current path. Calculate actions and total svings but don't make any changes.
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```
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imageoptimizer -recursive -diff 25
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```
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Replace images in the current path with a compressed version if compressing at 80% quality reduces file size by at least 30%
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```
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imageoptimizer -quality 80 --replace --diff 30
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```
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