Degradation of the Recoloring Specific Degree Protan CVD Image From inserted Watermark

In the first part of the paper the color vision deficiency (CVD), as a consequence of the deformity in the L cones photoreceptors, was described. After that, an algorithm for the color transformation in the LMS color space is described. The color transformation algorithm aims to expand the range of colors (recoloring) in images intended for protan CVD people. The described algorithm is adapted to the degree of protanomaly for a specific protan CVD person. The second part of the paper presents the results of the Experiment, which was realized with the aim of analyzing the effect of the inserted watermark on the recoloring of the image with the degree of protanomaly. The watermark is inserted using the Block SVD algorithm. Some degrees of protanomaly are included in the analysis of the experimental results. The Experimental results are presented in the form of recoloring images, extracted watermarks and graphics. The analysis of the results was carried out by: a) subjective and b) objective methods. The subjective analysis was realized by visual inspection of the recoloring images and extracted watermarks. The objective analysis was carried out by comparative analysis of mean square error (MSE). Based on subjective and objective analysis, the threshold for the insertion factor, α
c
, where the watermark and the RC image are of satisfactory quality was determined.