foobaz / pngloss Goto Github PK

View Code? Open in Web Editor NEW

83.0 5.0 5.0 7.89 MB

Lossy compression of PNG images

Home Page: https://frammish.org/pngloss/

License: Other

C 30.07% Makefile 20.58% Shell 40.14% Roff 1.06% HTML 1.52% Go 5.77% CSS 0.79% M4 0.06%

png lossy-compression image-optimization png-compression image-compression c

pngloss's People

Stargazers

Watchers

Forkers

imageprocessing-electronicpublications bits-quant patmosxx-v2 hanskeksnascher shamork

pngloss's Issues

Use NLM for dither?

Maybe?:

dc[i] = color_distance(current, current+i)
dcs = sum(dc)
if (dcs > 0) {dc[i] /= dcs} else {dc[i] = 1.0/n}
ec[i] = error * dc[i]

Separate code and docs?

Maybe?:

mkdir src
mv *.c *.h src

pngloss/Makefile

Line 13 in 2a67d09

 OBJS = color_delta.o optimize_state.o pngloss_image.o pngloss_opts.o pngloss.o rwpng.o 

OBJS = src/color_src/delta.o src/optimize_state.o src/pngloss_image.o src/pngloss_opts.o src/pngloss.o src/rwpng.o

options->strength?

Hi @foobaz .

Maybe you should use an adaptive model?:

quantization_strength_local = abs(current_pixel - mean(current_pixel + 3x3)) * options->strength / 10

Build error

./configure runs fine, but make gives:

Making all in src                                                                                                              [80/7859]
make[1]: Entering directory '/data/git/pngloss/src'                                                                                     
gcc -DPACKAGE_NAME=\"pngloss\" -DPACKAGE_TARNAME=\"pngloss\" -DPACKAGE_VERSION=\"1.0.1\" -DPACKAGE_STRING=\"pngloss\ 1.0.1\" -DPACKAGE_B
UGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"pngloss\" -DVERSION=\"1.0.1\" -I.    -I/usr/include/libpng16 -g -O2 -MT pngloss-color_delta
.o -MD -MP -MF .deps/pngloss-color_delta.Tpo -c -o pngloss-color_delta.o `test -f 'color_delta.c' || echo './'`color_delta.c            
mv -f .deps/pngloss-color_delta.Tpo .deps/pngloss-color_delta.Po                                                                        
gcc -DPACKAGE_NAME=\"pngloss\" -DPACKAGE_TARNAME=\"pngloss\" -DPACKAGE_VERSION=\"1.0.1\" -DPACKAGE_STRING=\"pngloss\ 1.0.1\" -DPACKAGE_B
UGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"pngloss\" -DVERSION=\"1.0.1\" -I.    -I/usr/include/libpng16 -g -O2 -MT pngloss-optimize_st
ate.o -MD -MP -MF .deps/pngloss-optimize_state.Tpo -c -o pngloss-optimize_state.o `test -f 'optimize_state.c' || echo './'`optimize_stat
e.c                                                                                                                                     
mv -f .deps/pngloss-optimize_state.Tpo .deps/pngloss-optimize_state.Po                                                                  
gcc -DPACKAGE_NAME=\"pngloss\" -DPACKAGE_TARNAME=\"pngloss\" -DPACKAGE_VERSION=\"1.0.1\" -DPACKAGE_STRING=\"pngloss\ 1.0.1\" -DPACKAGE_B
UGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"pngloss\" -DVERSION=\"1.0.1\" -I.    -I/usr/include/libpng16 -g -O2 -MT pngloss-pngloss_ima
ge.o -MD -MP -MF .deps/pngloss-pngloss_image.Tpo -c -o pngloss-pngloss_image.o `test -f 'pngloss_image.c' || echo './'`pngloss_image.c  
mv -f .deps/pngloss-pngloss_image.Tpo .deps/pngloss-pngloss_image.Po                                                                    
gcc -DPACKAGE_NAME=\"pngloss\" -DPACKAGE_TARNAME=\"pngloss\" -DPACKAGE_VERSION=\"1.0.1\" -DPACKAGE_STRING=\"pngloss\ 1.0.1\" -DPACKAGE_B
UGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"pngloss\" -DVERSION=\"1.0.1\" -I.    -I/usr/include/libpng16 -g -O2 -MT pngloss-pngloss_opt
s.o -MD -MP -MF .deps/pngloss-pngloss_opts.Tpo -c -o pngloss-pngloss_opts.o `test -f 'pngloss_opts.c' || echo './'`pngloss_opts.c
mv -f .deps/pngloss-pngloss_opts.Tpo .deps/pngloss-pngloss_opts.Po
gcc -DPACKAGE_NAME=\"pngloss\" -DPACKAGE_TARNAME=\"pngloss\" -DPACKAGE_VERSION=\"1.0.1\" -DPACKAGE_STRING=\"pngloss\ 1.0.1\" -DPACKAGE_B
UGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"pngloss\" -DVERSION=\"1.0.1\" -I.    -I/usr/include/libpng16 -g -O2 -MT pngloss-pngloss.o -
MD -MP -MF .deps/pngloss-pngloss.Tpo -c -o pngloss-pngloss.o `test -f 'pngloss.c' || echo './'`pngloss.c
mv -f .deps/pngloss-pngloss.Tpo .deps/pngloss-pngloss.Po
gcc -DPACKAGE_NAME=\"pngloss\" -DPACKAGE_TARNAME=\"pngloss\" -DPACKAGE_VERSION=\"1.0.1\" -DPACKAGE_STRING=\"pngloss\ 1.0.1\" -DPACKAGE_B
UGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"pngloss\" -DVERSION=\"1.0.1\" -I.    -I/usr/include/libpng16 -g -O2 -MT pngloss-rwpng.o -MD
 -MP -MF .deps/pngloss-rwpng.Tpo -c -o pngloss-rwpng.o `test -f 'rwpng.c' || echo './'`rwpng.c
mv -f .deps/pngloss-rwpng.Tpo .deps/pngloss-rwpng.Po
gcc -I/usr/include/libpng16 -g -O2 -lpng16 -lz  -o pngloss pngloss-color_delta.o pngloss-optimize_state.o pngloss-pngloss_image.o pnglos
s-pngloss_opts.o pngloss-pngloss.o pngloss-rwpng.o  
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_read_image24_libpng':
/home/pp/git/pngloss/src/rwpng.c:186: undefined reference to `png_create_read_struct'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:192: undefined reference to `png_create_info_struct'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:207: undefined reference to `png_set_option'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:221: undefined reference to `png_set_read_fn'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:223: undefined reference to `png_read_info'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:229: undefined reference to `png_get_IHDR'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:255: undefined reference to `png_set_gray_to_rgb'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:260: undefined reference to `png_get_valid'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:277: undefined reference to `png_set_interlace_handling'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:282: undefined reference to `png_read_update_info'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:284: undefined reference to `png_get_rowbytes'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_create_row_pointers':
/home/pp/git/pngloss/src/rwpng.c:117: undefined reference to `png_get_rowbytes'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_read_image24_libpng':
/home/pp/git/pngloss/src/rwpng.c:302: undefined reference to `png_read_image'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:307: undefined reference to `png_read_end'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:394: undefined reference to `png_destroy_read_struct'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:202: undefined reference to `png_destroy_read_struct'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:294: undefined reference to `png_destroy_read_struct'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:213: undefined reference to `png_set_keep_unknown_chunks'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:217: undefined reference to `png_set_read_user_chunk_fn'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:264: undefined reference to `png_get_gAMA'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:240: undefined reference to `png_set_expand'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:241: undefined reference to `png_set_filler'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:251: undefined reference to `png_set_strip_16'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:194: undefined reference to `png_destroy_read_struct'
/usr/bin/ld: pngloss-rwpng.o: in function `user_read_data':
/home/pp/git/pngloss/src/rwpng.c:75: undefined reference to `png_get_io_ptr'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:79: undefined reference to `png_error'
/usr/bin/ld: pngloss-rwpng.o: in function `read_chunk_callback':
/home/pp/git/pngloss/src/rwpng.c:141: undefined reference to `png_get_user_chunk_ptr'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_error_handler':
/home/pp/git/pngloss/src/rwpng.c:655: undefined reference to `png_get_error_ptr'
/usr/bin/ld: pngloss-rwpng.o: in function `user_write_data':
/home/pp/git/pngloss/src/rwpng.c:94: undefined reference to `png_get_io_ptr'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_write_image_init':                                                                     
/home/pp/git/pngloss/src/rwpng.c:449: undefined reference to `png_create_write_struct'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:455: undefined reference to `png_create_info_struct'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:471: undefined reference to `png_set_compression_level'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:472: undefined reference to `png_set_compression_mem_level'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:467: undefined reference to `png_destroy_write_struct'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:457: undefined reference to `png_destroy_write_struct'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_version_info':
/home/pp/git/pngloss/src/rwpng.c:43: undefined reference to `png_get_header_ver'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_write_image24':
/home/pp/git/pngloss/src/rwpng.c:524: undefined reference to `png_init_io'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:532: undefined reference to `png_set_write_fn'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:546: undefined reference to `png_set_unknown_chunks'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:610: undefined reference to `png_set_IHDR'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:610: undefined reference to `png_set_IHDR'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_write_end':
/home/pp/git/pngloss/src/rwpng.c:481: undefined reference to `png_write_info'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:486: undefined reference to `png_set_packing'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:488: undefined reference to `png_set_filter'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:490: undefined reference to `png_write_row'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:493: undefined reference to `png_set_filter'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:494: undefined reference to `png_write_row'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:500: undefined reference to `png_write_end'
/usr/bin/ld: /home/pp/git/pngloss/src/rwpng.c:502: undefined reference to `png_destroy_write_struct'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_set_gamma':
/home/pp/git/pngloss/src/rwpng.c:508: undefined reference to `png_set_gAMA'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_write_end':
/home/pp/git/pngloss/src/rwpng.c:484: undefined reference to `png_set_filler'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_create_row_pointers':
/home/pp/git/pngloss/src/rwpng.c:117: undefined reference to `png_get_rowbytes'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_write_end':
/home/pp/git/pngloss/src/rwpng.c:497: undefined reference to `png_write_image'
/usr/bin/ld: pngloss-rwpng.o: in function `rwpng_set_gamma':
/home/pp/git/pngloss/src/rwpng.c:511: undefined reference to `png_set_sRGB'
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:346: pngloss] Error 1
make[1]: Leaving directory '/data/git/pngloss/src'
make: *** [Makefile:410: all-recursive] Error 1

Comparison with XPNG?

Maybe add a comparison with XPNG to the documentation?

Origin:

pngloss -s 40 -- lena.png

xpng lena.png lena.xpng20.png 20

Two-stage error diffusion?

Maybe (small optimize)?:

https://github.com/ImageProcessing-ElectronicPublications/pngloss/blob/f352ce0a00abac75848d643ee09a6d628f597e32/src/optimize_state.c#L398
https://github.com/ImageProcessing-ElectronicPublications/pngloss/blob/f352ce0a00abac75848d643ee09a6d628f597e32/src/optimize_state.c#L446

to:

        int_fast16_t d = difference[c], dbak = 0;
...
        d += dbak;
        dbak = d / 4;
        d -= dbak;
        int_fast16_t twos = d / 16;

Windows binary

Dear William,
Could you be so kind to generate .exe for the rest of us who are mere Windows users w/o compiler?

Recommend Projects

React

A declarative, efficient, and flexible JavaScript library for building user interfaces.
Vue.js

🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
Typescript

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
TensorFlow

An Open Source Machine Learning Framework for Everyone
Django

The Web framework for perfectionists with deadlines.
Laravel

A PHP framework for web artisans
D3

Bring data to life with SVG, Canvas and HTML. 📊📈🎉

Recommend Topics

javascript

JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
web

Some thing interesting about web. New door for the world.
server

A server is a program made to process requests and deliver data to clients.
Machine learning

Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Visualization

Some thing interesting about visualization, use data art
Game

Some thing interesting about game, make everyone happy.

Recommend Org

Facebook

We are working to build community through open source technology. NB: members must have two-factor auth.
Microsoft

Open source projects and samples from Microsoft.
Google

Google ❤️ Open Source for everyone.
Alibaba

Alibaba Open Source for everyone
D3

Data-Driven Documents codes.
Tencent

China tencent open source team.