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Are JPEG images from Digital Cameras Optimized?

April 26, 2017digital cameras images JPEG optimized

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Are JPEG images from Digital Cameras Optimized?

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No! It would appear safe to say that every single JPEG photo generated by a recent digital camera uses the “typical” huffman tables provided in the JPEG ITU-T81 standard (tables K3, K4, K5 and K6 and reproduced below). I have confirmed this to be the case after examining photos from over a hundred digital cameras, from high-end full-frame dSLRs to point & shoot digicams.