Color to Gray and back’ using normalization of color components with Cosine, Haar and Walsh Wavelet
Hemant B. Kekre · IOSR Journal of Computer Engineering · 2013
The paper shows performance comparison of three proposed methods with orthogonal wavelet alias Cosine, Haar & Walsh wavelet using Normalization for 'Color to Gray and Back'.The color information of the image is embedded into its gray scale version using wavelet and normalization method.Instead of using the original color image for storage and transmission, gray image (Gray scale version with embedded color information) can be used, resulting into better bandwidth or storage utilization.Among three algorithms considered the second algorithm give better performance as compared to first and third algorithm.In our experimental results second algorithm for DCT wavelet using Normalization gives better performance in 'Color to gray and Back' w.r.t all other wavelet transforms in method 1, method 2 and method 3. The intent is to achieve compression of 1/3 and to print color images with black and white printers and to be able to recover the color information as and when required.