#smillaenlarger

Peter Selinger : Potrace
▻http://potrace.sourceforge.net

Potrace is a tool for tracing a #bitmap, which means, transforming a bitmap into a smooth, scalable image. The input is a bitmap (PBM, PGM, PPM, or BMP format), and the default output is an encapsulated PostScript file (EPS). A typical use is to create EPS files from scanned data, such as company or university logos, handwritten notes, etc. The resulting image is not “jaggy” like a bitmap, but smooth. It can then be rendered at any resolution. Potrace can currently produce the following output formats: EPS, PostScript, PDF, #svg (scalable #vector graphics), DXF, #geojson, PGM (for easy antialiasing of pixel-based #images), Gimppath, and XFig. Additional backends might be added in the future.

via ▻http://blog.thematicmapping.org/2015/12/mapping-real-time-snow-cover.html

#shell

#Agrandir une #photo sans perte de qualité avec #SmillaEnlarger
▻http://imageenlarger.sourceforge.net

http://a.fsdn.com/con/app/proj/imageenlarger/screenshots/231641.jpg

▻http://www.youtube.com/watch?v=1hNZVEtrFa0

le soft est aussi utilisable en #cli (ligne de commande), avec toutes ses options de choix de qualité. Sur Mac ça donne ça :

/Applications/SmillaEnlarger.app/Contents/MacOS/SmillaEnlarger -h

Usage:

SmillaEnlarger [ < sourcename > ] [ -options... ]
with options
-z <number> / -zoom <number>
Set zoom-factor to <number> percent ( integer value ).
-o <filename>
Write result to file <filename> .
-saveto <foldername>
Write results into folder <foldername> .

Output Dimensions:
-width < sizex > and -height < sizey >
set size of resulting image.
If both width and height are given, aspect ratio is changed by default.
Additionally, if you have set -width AND -height ,
you can set one of the following options:

-fit
Fit output inside the given rectangle.
-fitandbars
Fit output inside the given rectangle,
fill up with black margins.
-cover
Cover the given rectangle.
-coverandcrop
Cover the given rectangle, cut away the overlapping parts.

Enlarge Parameters:
-sharp < n >, -flat < n >, -dither < n >
-deNoise < n >, -preSharp < n >, -fNoise < n >
Set the enlarge parameters with integer numbers < n > between 0 and 100.

-quality <number>
Set image quality of the result.
-h / -help
Print this help.
-i
Start in interactive mode.