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Image Fusion based on（DCT）Discrete Cosine Transform

Image Fusion based on（DCT）Discrete Cosine Transform

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作者： Emadalden Mohammed Salem Al-hatami 合肥工业大学

学位级别：硕士

The development of remote sensing technology provides an effective technical means for human beings to define different environmental objects and utilize the involving data to extract the required *** are many types of remote sensing sensors,and different sensors have different characteristics for imaging the same scene,producing such as multispectral images,panchromatic Multi-source remote sensing images,infrared images,SAR images,*** image data acquired by various imaging sensors every day is massive,in order to process and use these data efficiently and comprehensively,multiple sources remote sensing images of the same scene need to be registered and ***-source Remote sensing image fusion uses specific techniques to remove redundant information from images from different sources for the same scene and combines Complementary information to generate a more precise,more accurate,and more comprehensive picture of the *** sensing image fusion is widely used in both military and civilian ***,this study investigated the possibility of enhancing image compression result based on DCT process,where we transformed the image from RGB to YCb Cr,which has a great advantage over RGB,that Cr and Cb components can be depicted with a resolution less than Y because the human visual system is less sensitive to color than to luminance,thus,the subsampling of chrominance type 4: 2: 2 then 4: 2: 0 was applied whereas the image is cut into blocks of 8x8 pixels to apply the DCT to highlight areas with high spatial *** to the lossy compression,we have been able to propose a quantization mask that eliminates the non-zero high energy values that appear in different parts of the block,to gain the maximum possible zeros adjacent after the zigzag scan.,to get a smaller size using ***,the DCs coefficients can then be a much smaller weight after the DPCM because they are often *** Huffman code eliminates the reappearance

关键词： Image fusion MS multispectral pan panchromatic remote sensing image Quick Bird image DCT transform

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