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Recently, the use of digital images in various fields is increasing rapidly.To increase the number of images stored and get faster transmission of them, itis necessary to reduce the size of these images. Single bitmap block truncationcoding (SBBTC) schemes are compression techniques, which are used to generate acommon bitmap to quantize the R, G and B planes in color image. As one of thetraditional SBBTC schemes, weighted plane (W-plane) method is famous for itssimplicity and low time consumption. However, the W-plane method also has poorperformance in visual quality. This paper proposes an improved SBBTC schemebased on W-plane method using parallel computing and hill climbing algorithm.Compared with various schemes, the simulation results of the proposed schemeare better than that of the reference schemes in visual quality and timeconsumption.

Single Bitmap Block Truncation Coding of Color Images Using Hill Climbing Algorithm