Slider mode to change DCT coefficients across entire image

[OmarShehata]

This came up on Twitter: https://twitter.com/polprogpl/status/1500847424595763201

This is super cool, I kinda expected the slider to remove higher order components from the entire image though :D

This wouldn't be too hard, basically instead of running it for the "chosen block" on the slider here:

jpeg-sandbox/src/index.js

Line 111 in a82958a

// Update the acValues in sequence to 0

You'd want to run it for all blocks. There's an example of how to get all blocks in the image here:

jpeg-sandbox/src/JpegUtils.js

Line 148 in a82958a

const allBlocks = [];

It would be especially cool hooked up to the mouse wheel (see #2) so you can drag and drop an image, and then scroll wheel to quantize it/compress it in real time.