Hybrid Image Compression Using DWT, DCT and Arithmetic Coding

Haitham Mahmoud Abdelghany
2017 International Journal for Research in Applied Science and Engineering Technology  
Digital images are often used in several domains. Large amount of data is necessary to represent the digital images, so the transmission and storage of such images are time-consuming and infeasible. Hence the information in the images is compressed by extracting only the visible elements. Normally the image compression technique can reduce the storage and transmission costs. During image compression, the size of a graphics file is reduced in bytes without disturbing the quality of the image
more » ... ty of the image beyond an acceptable level. Several methods such as Discrete Cosine Transform (DCT), DWT, etc. are used for compressing the images. But, these methods contain some blocking artefacts. To overcome this difficulty and a combination of DWT, DCT and Arithmetic encoding image compression techniques are proposed. This paper proposed a scheme for image compression using of DWT, DCT and Arithmetic Encoding named as hybrid compression technique. The implementation result shows the effectiveness of the proposed scheme in compressing the medical image. Also, a comparative analysis is performed to prove that our system is competent to compress the images in terms of Peak Signal to Noise Ratio (PSNR), Mean square error and Compression Ratio (CR).
doi:10.22214/ijraset.2017.11027 fatcat:nkeonsmelfg33h6lut5hxv5igi