Online "retro" image tool

[Marcuz]

I've finally tested it and imho it's great! I would love a plugin version of it for photoshop, the results in the clarity and sense of color in reduction are far superior to saving a 8 color png with the same diffusion percentages!
Great work!

[edit] also the possibility to load palettes to apply could be cool, if you take suggestions for further development!

[Hungry Horace]

Personally I love the Zx palette addition! Many thanks for that!

Maybe some other machines could be added. C64 or amstrad modes? Although they are not to my personal tastes / wants , it might expand the potential user-base?

[AnimaInCorpore]

Originally Posted by Marcuz

[edit] also the possibility to load palettes to apply could be cool, if you take suggestions for further development!

What you actually can do is lock the colours of one image by setting the check on the upper left side. Now another image can be remapped to that selected colours by choosing the colour "Global". Not quite happy about how this solution works but... well, give it a try.

[Marcuz]

Originally Posted by AnimaInCorpore

What you actually can do is lock the colours of one image by setting the check on the upper left side. Now another image can be remapped to that selected colours by choosing the colour "Global". Not quite happy about how this solution works but... well, give it a try.

[edit]I'm not sure at anymore of the striked part[/edit]
Ohhh! it's actually very interesting, I've just tested it. I don't mind the added step, but the new image gets remapped using the color proportions (the quantity or priority I think) from the old image, so disregarding the value differences in the new one.

The result is that the dithering must come it to reinterpret the image, and it is by necessity more present.
It's a cool experiment as you say, and I'll make use of it on occasion, but it's not a full remapping of the image, and that would be more accurate I think.

But seriously, this is a very nice software: It has just taken residence on my windows bar, as a Chrome application shortcut

[Megol]

How hard would it be to add "sliced" mode support, that is: changing x colors per scanline? I guess the IFF doesn't support it so maybe pretty hard

[AnimaInCorpore]

Originally Posted by Megol

How hard would it be to add "sliced" mode support, that is: changing x colors per scanline? I guess the IFF doesn't support it so maybe pretty hard

It should be not that hard. I think I'll add it later on. In fact the IFF does indeed support a "line by line palette" feature so that's good news. I wonder if there's an application which can read those files though.

[Megol]

Originally Posted by AnimaInCorpore

It should be not that hard. I think I'll add it later on. In fact the IFF does indeed support a "line by line palette" feature so that's good news. I wonder if there's an application which can read those files though.

Cool, didn't know that! Always thought that the programs using sliced HAM and "dynamic hires" used custom formats.

[AnimaInCorpore]

Update: another dither option added: "Checks". The obvious functions is to use alternating colour dithering. This is better for images with more details where the error diffusion would result in a "dirty" image. Only for images with equal or less than 64 colours (it's disabled on higher colour counts).

[Marcuz]

Nice one!

[Marcuz]

I've spotted something strange: when saving the image as IFF, the image gets a brown border few px wide on the right side.

That said, I keep marveling at the great result when reducing a 24bit png to a 8 colors IFF with the 4096 palette. I love it!

[AnimaInCorpore]

Originally Posted by Marcuz

I've spotted something strange: when saving the image as IFF, the image gets a brown border few px wide on the right side.

That said, I keep marveling at the great result when reducing a 24bit png to a 8 colors IFF with the 4096 palette. I love it!

Could you please send me the image you're trying to convert? Possibly this is caused by the fact that the image width is not a multiple of 16 pixels!?

[Trachu]

nice program but too bad it does not work with internet explorer

[Marcuz]

Originally Posted by AnimaInCorpore

Could you please send me the image you're trying to convert? Possibly this is caused by the fact that the image width is not a multiple of 16 pixels!?

Sorry I missed you reply; probably you are right, as the image width is 505 px; I reproduce it though and when saving now, sometimes I get a blacked out image (could be the palette chosen?), sometimes the black border to the right side.

I zipped two test images here.

Unrelatedly, it would be cool to have a simple resize option in program.

[Retrofan]

Originally Posted by Marcuz

[edit] also the possibility to load palettes to apply could be cool, if you take suggestions for further development!

I've just tried it and it's very nice

But in an Amiga to have the best colors applied you need to use FPPrefs, so your program needs to be able to load and use other palettes.

[AnimaInCorpore]

Originally Posted by Marcuz

Sorry I missed you reply; probably you are right, as the image width is 505 px; I reproduce it though and when saving now, sometimes I get a blacked out image (could be the palette chosen?), sometimes the black border to the right side.

I zipped two test images here.

Unrelatedly, it would be cool to have a simple resize option in program.

The black border IFF saving issue has been fixed.

Resizing is actually on the list. I guess having a list of fixed (standard) resolutions to choose from is sufficient enough?

[Marcuz]

Originally Posted by AnimaInCorpore

The black border IFF saving issue has been fixed.

Resizing is actually on the list. I guess having a list of fixed (standard) resolutions to choose from is sufficient enough?

Yeah, thank you! I do resizing in batches usually and that can be better done in external programs. Having standard resolutions in is just great!

[AnimaInCorpore]

Originally Posted by Retrofan

But in an Amiga to have the best colors applied you need to use FPPrefs, so your program needs to be able to load and use other palettes.

Actually you can do that, however, in an awkward way.

At first load an image from which you want the palette mapped to others. Then choose "original" as the colour and click on the left checkbox which then makes that palette "global".

Now load other pictures which should be remapped and choose "global" as the color.

In the following screenshot you can see the left one is the original picture ("original" colors and checked) and the right pictures have been mapped to that palette ("global" colours).

[Marcuz]

I just love this program.

I'm a bit confused by the various palettes though, is there a definition list or readme available?

One more request, also: would you like to add cbm64 dithering modes too?

[AnimaInCorpore]

Originally Posted by Marcuz

I'm a bit confused by the various palettes though, is there a definition list or readme available?

One more request, also: would you like to add cbm64 dithering modes too?

Yes, the menu entries are still a bit confusing. I need to change that to make it more clear what you can do and I'll add some more "presets" so that it's easier to choose the right mode.

Yeah, I can think of supporting other machines as well.

[AnimaInCorpore]

Also on the list: optional CRT emulation (based on the CRT shaders by Timothy Lottes) to improve the look of the generated pictures: