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= Reducing Photos Weight =

This technique gives a possible implementation for the CategoryBpPageSizeLimit in the cases where pages included JPEG images that come from digital cameras.

Most digital cameras annotate the photos they take with metadata (called EXIF); in many cases, these metadata include a thumbnail of the photo itself. These metadata are preserved through most images processing tools, unless you specifically request to remove them.

All of these data, while useful when post-processing the picture or for classifying it, is of no use to most Web browsers, and probably to no mobile Web browser.

Given that the thumbnail is usually around 5Ko, removing it is a big step toward making your pictures lighter, especially when proving a thumbnail of the picture.

On linux (and others UNIX systems), the jhead utility allows to remove all the EXIF metadata using: jhead -de my-image.jpg.


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