[Feature Request] Enable compression of the downloaded images

[baal000]

It might be good to add a toggle to compress the images before packing them into the cbz files as there might be significant decrease in necessary storage space.

Quick tests with jpegoptim reveal that it is possible to reduce the filesize of normal manga pages (black & white) to up to 1/3 of the original downloaded file without noticing a difference. In Color it was more noticable.

I added the testfiles as zips
Originals.zip Compressed.zip

[C9Glax]

Probably after ServerV2 release

[C9Glax]

Have been playing around for a bit with just simple jpeg compresssion and black/white Adaptive Threshold.
With just compression alone (comparison below), it is about 1/6th the space requirement (over more than just one image).

Raw	Compressed

[C9Glax]

BW sample:

[C9Glax]

Should probably make the compression a value, instead of on/off

[baal000]

I think that would be the best to let everyone decide for themselves how compressed it should be.
Ideally it would be configurable per Manga so you can change it. But I think that would push it.

Thanks for the great work

[C9Glax]

It is configurable now between 1 and 100 JPEG Quality.
Configurable per Manga... I'll give the thought a spin, but probably not.