Pixel Joint Forum: The challenge to upscale pixel art

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   Whoaaaa! This is so amazing! It's like the Kopf-Lischinski except possibly better! Been waiting for an implementation like this for ages. You've done a great deed for the world of pixel art. ^.^

Ha! And it works on tiny little sprites with ugly palettes, too! My only complaint would be 2x's support for transparency. I kept getting these odd image artifacts so I had to convert the background to white.

Author	Message
DragonDePlatino Commander Joined: 22 July 2015 Online Status: Offline Posts: 59	Posted: 27 December 2013 at 12:30pm
	Whoaaaa! This is so amazing! It's like the Kopf-Lischinski except possibly better! Been waiting for an implementation like this for ages. You've done a great deed for the world of pixel art. ^.^ Ha! And it works on tiny little sprites with ugly palettes, too! My only complaint would be 2x's support for transparency. I kept getting these odd image artifacts so I had to convert the background to white.
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JosephSeraph Commander Joined: 09 August 2016 Online Status: Offline Posts: 55	Posted: 27 December 2013 at 1:15pm
	Whoa, this is certainly sweet indeed! ♥
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bzz Seaman Joined: 20 July 2014 Online Status: Offline Posts: 11	Posted: 02 January 2014 at 10:24pm
	I finally did implement scale2x algorithm in my app for for iPad/iPhone https://itunes.apple.com/us/app/repin-pixel-art-studio/id766364268?mt=8 Edited by bzz - 02 January 2014 at 10:25pm
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DragonDePlatino Commander Joined: 22 July 2015 Online Status: Offline Posts: 59	Posted: 03 January 2014 at 11:17pm
	Hey, lucky you! I ended up using this for the 2x version of DawnHack, a NetHack/UnNetHack tileset. It's gotten quite a few downloads so far and I'm gonna be working to make it the official tileset of UnNetHack since there really aren't any non-text ones yet. And don't worry, I made sure to accredit you in the README. :D
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KWVance Seaman Joined: 21 April 2015 Online Status: Offline Posts: 3	Posted: 09 January 2014 at 12:23pm
	It seems hard but its actually not, it was one of the first things I learned in pixel art. What makes it look hard is your mind set, your thinking of how to do it all at once. You need to think small, like pixels. This is how it was shown to me. ---> Click Too See <--- Notice the pattern? The line made of groups of two pixels as 4x as many now same goes for the rest of the lines. So, this is what you do. Step one upscale image 400% Step two set the enlarged image to 50% opacity Step three create a new layer Step four trace the image as shown in the picture Step five when you are done touch up odd shapes. Better it be inaccurate and look good, than it be accurate and not look good. Yes it may be tedious, and take a while, but all great artwork is like that. Don't forget to save often
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bluedxca93 Commander Joined: 27 February 2016 Online Status: Offline Posts: 104	Posted: 09 January 2014 at 11:00pm
	Another working way, espacially for complex small 32x32 or 48x48 pixmaps: 1)Scale the image with 3xbrlv4 noblend 3 times. 2)Open this image in inkscape 3)Trace it with the normal trace algorithm ( You have to disable all smoothing or simplying filters) 4) Edit the paths. 5) Open this image in Gimp, decrease colors and create a new image with 30 percent layer. 6) Upscale the original image with Lnczos or an better algorithm. 7) Edit the upscaled vectorized layer with gimp pencil, after inserted the upscaled image as new layer. 8) Enjoy the new image. Takes about 20 minutes per picture, but you will have it scaled at 9x. So you could quickly downscale it to many sizes with rotsprite.
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torguen Midshipman Joined: 26 January 2016 Online Status: Offline Posts: 59	Posted: 20 January 2014 at 12:06pm
	I love that filter, It is by far the one I like best of all existing filters.
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