Perceptually_Optimized_Watermarking Track the visibility threshold of an image watermarking method.
|Categories||Images / Quality Assessment / Watermarking|
|Quality assessment method||Two Alternative Forced Choice|
|Created the||09 Apr 2015|
9 original color images were used, 243 distorted images were generated with 3 different embedding algorithms, for each image (and each algorithm), 9 embedding strengths were used (9x9x3=243).
Details on this database can be found in the citation below. Subjective evaluations were made at viewing distance of 6 times the screen height using a 2AFC (Two Alternative Forced Choice) protocol. Distortions for each processing and each image have been optimised in order to uniformly cover the visibility scale.
37 observers were enrolled in this experiment. An outlier detection method was performed, the dendrogram is plotted here. Overall, 6 observers were discarded.