Skip to content

Color2Gray: Salience-Preserving Color Removal. Amy A. Gooch, Sven C. Olsen, Jack Tumblin, and Bruce Gooch. SIGGRAPH 05 and Robust color-to-gray via nonlinear global mapping. Yongjin Kim and Cheolhun Jang and Julien Demouth and Seungyong Lee. SIGGRAPH ASIA 2009

Notifications You must be signed in to change notification settings

y1m1ng1in/Color2Gray-Algorithms

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

5 Commits
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

Color2Gray-Algorithms

Copyright (c) 2021 Yiming Lin

Implementation of color-to-grayscale image conversion algorithms proposed in the following papers:


spcr.py implements "Color2Gray: Salience-Preserving Color Removal. Amy A. Gooch, Sven C. Olsen, Jack Tumblin, and Bruce Gooch. SIGGRAPH 05"

Argument:

--intput: specify the path to the input color image

--output: specify the path to the output grayscale image

--mu: specify the width (actual width is 2 * mu) of the squared neighborhood pixel patch

--npi and --dpi: specify user parameter theta by npi times pi / dpi

--alpha: specify user parameter alpha


ngm.py implements "Robust color-to-gray via nonlinear global mapping. Yongjin Kim and Cheolhun Jang and Julien Demouth and Seungyong Lee. SIGGRAPH ASIA 2009"

Argument:

--intput: specify the path to the input color image

--output: specify the path to the output grayscale image

--dof: degree of trigonometric polynomial used, default is 4 as paper suggested

--alpha: specify user parameter alpha

--lamb: specify lamb * number of pixels for E_r term, where E_image = E_s + E_r as paper suggested


The following commands contains parameters used for output with reasonable quality, where the output image paths are all set to testarg.png:

python .\ngm.py --input ".\images\map.png" --output "testarg.png" -a 0.1 -l 1
python .\ngm.py --input ".\images\sample.png" --output "testarg.png" -a 4 -l 1
python .\ngm.py --input ".\images\colorCircle.png" --output "testarg.png" -a 1 -l 1
python .\ngm.py --input ".\images\dots.png" --output "testarg.png" -a 1 -l 1
python .\ngm.py --input ".\images\MonetP.png" --output "testarg.png" -a 4 -l 1
python .\ngm.py --input ".\images\lischinski.png" --output "testarg.png" -a 0.1 -l 500

python .\spcr.py --input ".\images\sample_30.png" --output "testarg.png" --mu 8
python .\spcr.py --input ".\images\dots.png" --output "testarg.png" --mu 16
python .\spcr.py --input ".\images\mapIslandCrop.png" --output "testarg.png" --mu 16 --npi 8
python .\spcr.py --input ".\images\MonetP.png" --output "testarg.png" --mu 16
python .\spcr.py --input ".\images\lischinski.png" --output "testarg.png" --mu 32 --npi 2 --alpha 10

About

Color2Gray: Salience-Preserving Color Removal. Amy A. Gooch, Sven C. Olsen, Jack Tumblin, and Bruce Gooch. SIGGRAPH 05 and Robust color-to-gray via nonlinear global mapping. Yongjin Kim and Cheolhun Jang and Julien Demouth and Seungyong Lee. SIGGRAPH ASIA 2009

Topics

Resources

Stars

Watchers

Forks

Releases

No releases published

Packages

No packages published

Languages