Visualize quantization table compression

[OmarShehata]

Currently the slider "compresses" the image by zero-ing out DCT components in order of highest weight.

This is not quite how JPEG works in practice. To apply compression, you divide each component by a specific constant factor. These constants for each component are specified in a quantization table.

The values in the quantization table are chosen to preserve low-frequency information and discard high-frequency (noise-like) detail as humans are less critical to the loss of information in this area.

From: http://www.robertstocker.co.uk/jpeg/jpeg_new_10.htm

So it could be interesting to compare compressing using different quantization tables. Or simply as someone suggested on Twitter: zero-out the components by the zig zag order (highest frequency to lowest) which is generally how the quantization tables are designed.