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17 lines
1.0 KiB
Markdown
17 lines
1.0 KiB
Markdown
# About the processing pipeline
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imgproxy has a specific processing pipeline tuned for maximum performance. When you process an image with imgproxy, it does the following:
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* If the source image format allows shrink-on-load, imgproxy uses it to quickly resize the image to the size that is closest to desired;
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* If it is needed to resize an image with an alpha-channel, imgproxy premultiplies one to handle alpha correctly;
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* imgproxy resizes the image to the desired size;
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* If the image colorspace need to be fixed, imgproxy fixes it;
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* imgproxy rotates/flip the image according to EXIF metadata;
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* imgproxy crops the image using specified gravity;
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* imgproxy fills the image background if the background color was specified;
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* imgproxy applies gaussian blur and sharpen filters;
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* imgproxy adds watermark if one was specified;
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* And finally, imgproxy saves the image to the desired format.
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This pipeline with using sequential access to source image data allows to significantly reduce memory and CPU usage — one of the reasons imgproxy is so performant.
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