Jaksic B.   Gara B.   Ivkovic R.   Petrovic M.   Milosevic M.  

Analysis brightness effect on quality pictures after compression with JPEG and SPIHT compression methods

Reporter: Jaksic B.

In this paper a comparison of objective quality of pictures after compression using two methods - JPEG and SPIHT - is presented. Methods are applied on pictures with different levels of brightness for different values ​​of the bit rate (bpp) using software VCDemo. The quality of the compressed pictures is determined by values of MSE (mean square error), SNR (signal to noise ratio) and PSNR (peak signal to noise ratio). The values are presented in appropriate tables and diagrams. Based on the obtained data, we compared the quality of pictures with different brightness after compression. It was found that the used compression gives better results compared to a different level of picture brightness. It is presented how the quality of compression varies with the brightness pictures at different bit rates.