Upscaling / Enlarging

[XnTriq]

Thanks to fellow “XnThusiast” cday, I learned about a freeware program the other day that promises better image scaling quality and can upscale and enlarge photos better than Photoshop's “Preserve Details” algorithm: Steffen Gerlach's “A Sharper Scaling is a high quality image scaling technology mainly developed for upscaling.”

• Alien Skin: Blow Up
• Bearded Frog: Enlarger PRO
• onOne: Genuine Fractals
• MeeSoft: Image Analyzer + Fractal interpolation
• Kneson: Imagener (p/k/a ZSpline)
• Nikola Dachev: ImageScaler
• Giovanni Brembati: PhotoResampling
• BenVista: PhotoZoom Pro (p/k/a S-Spline)
• Extensis: pxl SmartScale
• ddisoftware: Qimage
• Vlad Hosu: Reshade
• Brian Spangler: ResizeIT
• Fred Miranda: Resize Pro
• Peter Werner: Resizor
• Dr. Steven A. Ruzinsky: SAR Image Processor
• FixerLabs: SizeFixer
• STOIK Imaging: Smart Resizer
• Mischa Lusteck: SmillaEnlarger
• HumanSoftware: XFile
• Mehdi: Zoom Engine

• Image enlarger/Magnification filter
• Optional subpixel sampling for high-Q zoom
• Fascinating new image rescaling technology
• How to batch convert 1024x768 jpeg to 1440x900
• Pixel art scaling algorithms such as hq2x, 2xsai, etc
• resizing algorithms

[michel038]

Upscaling icons, drawings
http://waifu2x.me/
It's a on-line utility , upscaling up to 10x10, using Deep Convolutional Neural Networks
(it's a bit slow, so test with small pictures)
Original picture


Zoom in


Classic soft


Using Waifu


You can also clean photos for jpeg artefacts : (style: photo, magnification :0 , noise reduction high)
Before


After

[XnTriq]

Thank you for the examples, michel038
cday had brought waifu2x to my attention last year when it was first released to the public, but at the time I failed to realize that its potential uses go beyond anime-style art.

• GitHub: waifu2x-caffe

• Microsoft Research
  • Depixelizing Pixel Art
    Naïve upsampling of pixel art images leads to unsatisfactory results. Our algorithm extracts a smooth, resolution-independent vector representation from the image which is suitable for high-resolution display devices.
• Pixenlarge
  Pixenlarge is an image enlargement tool. It is distributed both as a plug in for Adobe Photoshop and also as a standalone application. It is mainly specialized in enlarging drawn images, such as e.g. clip arts, icons, drawings, sketches, cartoons etc.
• Scale2x
  Scale2x is real-time graphics effect able to increase the size of small bitmaps guessing the missing pixels without blurring the images.

[captaincavern]

Two more good ones (both free )

http://www.fitswork.de/software/softw_en.php
http://cas.eedept.kobe-u.ac.jp/WelcomeE ... ex_en.html

SAR's PseudoLAD is my fav though.

PS: And this for pixel art: https://sourceforge.net/projects/xbrz/ (Get ScalerTest app)

[XnTriq]

Thanks, captaincavern!

Tutorials I found helpful (JavaScript required):

• General Cathexis (SAR Image Processor): Comparisons of Image Magnification Methods
• PixInsight: Interpolation Algorithms » Upsampling Examples

[regs]

Anime4K, FSRCNNX and NIS would also be good
https://github.com/bloc97/Anime4K
https://github.com/NVIDIAGameWorks/NVIDIAImageScaling

https://raw.githubusercontent.com/bloc9 ... 60p_4K.png

[faltonico]

FSR 2.0 which is open source, can also be used to upscale still images, besides renders... command line only for now:
https://github.com/GPUOpen-Effects/FidelityFX-FSR2

[Neuro-NX]

I use this AI application for upscaling, interpolation and enhancing videos, and upscaling and enhancing photos.

Topaz Photo AI - https://www.topazlabs.com/topaz-photo-ai
Topaz Video AI - https://www.topazlabs.com/topaz-video-ai

I also use Davinci Resolve to then do further adjustment using the Topaz Video AI plugin.

[michel038]

I tried ChatGPT free
Source file

GS-5.jpg

detail :

GS-5d.jpg

zoom in 500% :

GS-5z.jpg

Result detail :

GS-6d.jpg

Prompt :
"Can you enlarge this image (double each dimension) without changing its appearance? Only smoothing to avoid aliasing."