Download the zipped files from the archival links below which contain the codes for the methods of, respectively, Tan and Ikeuchi1, Shen et al.2, and Shen and Zheng3. Then, place the therein contained images inside this folder. See structure below.
Note: the links were archived directly from the respective authors' pages (see link suffix) where their codes along with test images are freely distributed for research purposes.
1 http://web.archive.org/web/20190828202158/https://tanrobby.github.io/code/highlight.zip
2 http://web.archive.org/web/20190828202109/http://ivlab.org/publications/PR2008_code.zip
3 http://web.archive.org/web/20190828202133/http://ivlab.org/publications/AO2013_code.zip
The images folder should have the following structure.
README.md
animals.bmp
animals_gt.bmp
cups.bmp
cups_gt.bmp
fish.ppm
fruit.bmp
fruit_gt.bmp
head.ppm
lady.bmp
masks.bmp
masks_gt.bmp
rabbit.bmp
toys.ppm
train.bmp
watermelon.bmp
wood.bmp