Reptillian

Wouldn't libvips be more suitable here? I have created big images with Photoshop, but even there it struggles with humougous images.

I think you found your fastest solution here. A slower solution is to assign alpha using auto-leveled applied image as the base for creating alpha for a white layer, and then paste your image below, and do the necessary edits to get to what you need.

Just came to say that the file looks sketchy - https://www.virustotal.com/#/file/e075f88a1d9e2c4136b6f3f4bed051334a7e806e6a070a2e5f29ba4cc18537ed/detection But, judging by the AVs, looks like a false positive, but there are gandcrab virus that evades detection as malwares.

Affinity Designer is not free, but Inkscape and Scribus are free. In your case, Inkscape tracing would be perfect with the use of pixel snap extension. Of course, you have to clean up with something like Paint. NET before converting to vector form. It'll take more time, but your work will be transferable at any scale.

Are those shadows in pixel form? Personally, I would almost never use raster graphic softwares to make PDFs. I almost always use a combination of Scribus, Inkscape, and Affinity Designer to make my PDFs, and for very good reasons. The only time when raster graphics are ever acceptable for print if that you plan to print it right away without elements that are just better off with vector softwares, or you plan to mix actual vectors with raster graphics.

You might want to use a 3d program for this kind of task. If you have a height map, use that as a displacement map, and use your flag as a diffuse map. Then adjust perspective, and then render your flag over a mountain. With 2D programs, you're pretty much forced to guess how to wrap around.

Actually, I guess this is something I can code now to try to understand more about coding in general to improve on open source projects. C# is the programming language for Paint.NET right? I'm more accustomed to C++.

I'm more interested into selecting one of those option, and then the hypothetical plugins leads me to one of those result.Tried the Black and White+, but the sliders aren't exactly what I want to be seeing. There is an application where I use pixel sort to figure out gradient mapping of a image which involves applying grayscale operation to figure out how it was mapped. Some people use luminosity to map, and other use lightness, and sometimes people use one of the channel to map.

Looking for quick searches, I am not looking at any plugins that will allow me to convert a color to black and white to the following : Lightness based on the HSL model (Can't be done with gradient map reliably. Close sometimes, but not always) Luminosity (Default Black and White) (Looks close to ITU-R BT.709) Value(Not sure) Average of Channel (Not possible) Min Channel (Not possible) Max Channel (Not possible) The issue with the current one is that I need Lightness based on the HSL model, and Paint.NET has yet to have a plugin like that. And this raises another question. Why is luminosity on the default black and white different than luminosity in plugins? In plugins, it's using the HSL *L.

So, dimensions are apparently 16-bit restricted? Am I correct? That means maximum dimension are 65,335 x 65335 pixels.

There is no such thing as that in Paint.NET, and the author of Paint.NET will not be support CMYK for Paint.NET. So, you have to convert your PDN file to a CMYK program compatible software, and if you're looking into editing without paying a cent, there's only Krita. Scribus only offers a straight conversion. Plus, .ora is one way of transferring information from PDN to Krita. PSD is another. .dll is just a installation file, put it in plugin folder to install. The reason why CMYK to RGB results in less file size because 4 channels require a more information than 3 channels in general. Haven't tested LAB vs RGB vs CMYK file size to confirm. I know LAB requires more info than RGB just by the nature. LAB covers the entire human range spectrum, and that means colors RGB can't be used to display.

Krita has convert Image Color Space option, and convert layer color space option. You can use 8-bit integer, 16-bit integer, 16-bit float, and 32-bit float. You have CMYK, RGB, LAB, XYZ, and Grayscale color space as an option in Krita. To use Paint.NET exclusively, and have CMYK document option with free programs. You need to download .ora plugin for paint.net. It'll allow you to retain layers in paint.net, and use it as a file layer in Krita, so you can keep editing in Paint.NET while it can be automatically converted to CMYK in Krita. That's your best solution for CMYK while using Paint.NET for about everything except CMYK end result. .PSD is fine too, but .ORA is easily more interchangeable here.

The problem here is that pixels just ain't scalable like that. He probably used non-destructive indexing filter with a vector layer.

The only difference is that gray/white bar.

Artistic effect or compatibility with very old games/softwares. Some older games have limited palette, and to reduce banding, dithering is used. If you are modding say Ultimate Ride Disney Coaster, you'd note that dithering is the only way to reduce banding in menu images. Some games are reduced to 256 colors, and dithering helps the issue of banding. For artistic effect, amiga images achieves have some very nice images of how low color and dithering can give a oil feel that is somewhat rough. But, I do agree that for modern softwares purpose, for all intents and purposes, dithering isn't very useful, and there's no point to it unless you have a taste for it or you specialize in pixel art. Indexing still have use in separating colors for generating effects though. Threshold filter has some very useful niche usage for example.