Indian Journal of Science and Technology

Abstract

Objective: This study aims to contribute in developing a compression method that performs both high quality and applicable compression ratio, which is a hard task and requires a lot of sequential experiments since each of the aimed characteristics belong to different group type of image compression techniques lossy and lossless. Therefore, the hybridization between those two types is the convenient solution because it allows the desired results to appear in one technique. Methods/Findings: The researcher proposed reducing the pixel range that represents the original image by a fixed rate, which yields to reducing the repetition and preserving a large amount of the data in this phase before proceeding to the lossy part, in this case, RIFD technique that will affect better reducing the compressed image size due to the previous step. The Calculations of the objective measurements MSE, MAE and PSNR used to assess the effect of the suggested method (RPR) by collecting the results which gained after applying it to different grayscale and colour images. Application: The proposed lossless part does not require complex calculations and the results proved its ability to improve the compression quality for the elected lossy technique without affecting the compression ratio. Comparisons showed significant improvement on grey scale images especially those having 16-bit depth and marginally in RGB images.

Keywords: Compression Quality, Hybrid Compression, Objective Metrics, Reducing Pixel Range, Redundancy, RIFD Technique