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DosView 1.1 (Announce)

posted by Zyzzle, 06.11.2023, 04:29

> I just released an improved version v1.1
>
> https://github.com/SuperIlu/DosView/releases/tag/v1.1
>
> * added TIFF
> * added JPEG 2000
> * fixed zoom and documentation
> * added 24/32bpp autodetection
> * added image info
> * added num pad keys
> * added check to list modes
 Many thanks for all the new options.

Now, both arrow keys and number keys work well for me verses v. 1.0. And, the 8x speed option to move around in the image is very nice indeed.

One other minor point: it appears the -q option is somehow not uniform. It is not linear, at any rate. For .jp2 writing, it appears that anything from -q 50 to -q 100 will write a *lossless* image. -q 1 to -q 49 writes some sort of lossy image with .JP2, but it is not granular. I suggest to change the *default* -q to -q 100 which would be lossless for all three formats: .JPG, .JP2, and .WEB. I know lossless .JPG is a thing, even though it's seldom used.

The -q option for .JPG and .WEB is confusingly more granular than than with .JP2. For JPG and WEB it behaves as you'd expect (ie, -q 5 is a very poor lossy compression, while -q 95 is a very good lossy compression).

If you prefer to keep default -q at -q 95, then write lossy .JP2 by default. It'll avoid confusion. But, personally, I prefer the -q 100 as a pure lossless default to write only lossless images.

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