ACADSTAFF UGM
| Title | : | Analisis Hasil Proses Pemampatan JPEG dengan Metode Discrete Cosine Transform |
| Author | : |
ADI PRASETIO UTOMO (1) Dr. Agfianto Eko Putra, M.Si. (2) Catur Atmaji, S.Si., M.Cs. (3) |
| Date | : | 0 2012 |
| Keyword | : | JPEG, DCT, JPEG compression, grayscale images, PSNR, compression ratio JPEG, DCT, JPEG compression, grayscale images, PSNR, compression ratio |
| Abstract | : | JPEG is a digital compression standard developed by the Group of Experts Photograpic Joints using a combination of DCT and Huffman coding to compress a digital image.[1]. JPEG compression is a lossy compression algorithm. [2]. JPEG works by converting the spatial images and to represent frequency mapping.One of the methods in JPEG compression that can be used is a DCT method (Discrete Cosine Transform), with a separate low frequency information and high of an image. High frequency information will be selected to be eliminated which related to image compression and measurement quality of the image.[3] Files used are grayscale images with a bitmap format, has a size of 26.422 bytes, 176x144 pixel resolution. Image processed according to standard JPEG compression, the compression results are analyzed based on variations performed on block image transformationandquantization. Measurement of quality of image compression is done subjectively through visual view of the human eye and objectively with the parameter value of PSNR and compression ratio. From the study it can be concluded that the value of PSNR and compression ratio of an image can be used as a parameter to measure the image quality and can be detected using macroblock and value of quantization step which the right to obtain optimal results in compression of grayscale images |
| Group of Knowledge | : | Sistem Informasi Geografi (SIG) |
| Original Language | : | Bahasa Indonesia |
| Level | : | Nasional |
| Status | : |
Published
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