Remove interlace output

[David Jones]

PyPNG https://gitlab.com/drj11/pypng is quite big. I have been
thinking about ways to make it smaller.

One easy way that would make it a bit smaller is to remove the
interlace option on output. Any objections?

Cheers,
drj

[Ilya Razmanov]

Not a single one from me so far. All I need from this module regarding writing PNGs is PNG being formally correct, contain proper iDAT (alpha included), sometimes pHYs, in future may be gAMA. Other than that, if I need PNG to be optimized for size, be interlaced, and so on, I have other software to do that.

[David Jones]

Thanks for the reply. Actually, great to hear that someone is using
pHYs and gAMA. :)

Cheers,
drj

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[Ilya Razmanov]

On Tuesday, April 23, 2024 at 9:30:09 PM UTC+3 David wrote:

Thanks for the reply. Actually, great to hear that someone is using
pHYs and gAMA. :)

Actually, great to hear that someone is using
pHYs and gAMA. :)

One example:

https://github.com/Dnyarri/PixelArtScaling

(sorry, there's a kind of mess in here while I'm adding multiprocessing) - an example of efficient misuse of Scale2x and Scale3x algorithms to improve scans with "historically poor" resolution before OCR and stuff. For IO, surely I'm using your PNG module (since I managed to understand how to deal with it there's no way I will deal with Pillow, full with features I don't need, and having it's own opinion on how data should look).

With low-res scans, OCR software tend to complain, and I found out that, say, Scale3x with its unusual interpolation often makes an improvements in OCR, so I've made these pure Python implementations of ScaleNx, to use them from time to time.

My OCR software uses input image resolution to assign page size. Therefore, it would be very convenient if, scaling images up with Scale2x, I will double the resolution (and triple for Scale3x) so it keeps original print size in meters and precisely fit the old page layout.

With your PNG module, I easily do that, with just several lines of code. Programs are happy to see new resolution, I'm happy that I don't have to set it manually, everything is fine.

-- 
Ilyich the Toad
https://dnyarri.github.io/