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Advantages Of Image Modification

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Image modification defines as minimizing the amount of data required to represent image. Image modification is an application of Data modification on images. The objective of image modification is to minimize irrelevance and minimize of the image data in order to be able to store or communiate data in an efficient form. The best image quality at a given bit-rate is the main aim of image modification, however, there are other important characterstics of image modification schemes. Image is a graph that store visual perception, for example a 2-D picture, that has a similar appearance to some subject–usually a physical object, thus providing a depiction of it.Images may be 2-D, such as a picture, screen display, and as well as a 3-D, such …show more content…
However, because the input image is blocked, correlation across the block boundaries cannot be eliminated. This results in noticeable and annoying “blocking artifacts”' particularly at low bit rates as shown in figure 2. WAVELET-based schemes achieve better performance than other coding schemes like the one based on DFT. Since there is no need to block the input image and its basis functions have variable length, WAVELET based coding schemes can avoid blocking artifacts. WAVELET based coding also facilitates progressive transmission of …show more content…
• DFT-based image coders perform very well at moderate bit rates, higher modification ratios, and image quality degrades because of the artifacts resulting from the block-based DFT scheme.

• The effects of different WAVELET functions, filter orders, number of decompositions, image contents, and modification ratios are examined. The final choice of optimal WAVELET in image modification application depends on image quality and computational complexity.

• A suitable number of decompositions should be determined by means of image quality and less computational operation. choice of optimal WAVELET depends on the method, which is used for picture quality evaluation. We used objective and subjective picture quality measures.

• Increasing the decomposition level increasing the MSE and Modification Ratio and lower the PSNR.
• Higher order filter shows the low modification ratio, low MSE with high PSNR

• WAVELET based modification scheme can avoid blocking artifacts that is noticeable in DFT technique, but it has limitations in capturing geometric curves.so need new technique for image

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