A sensor node compression algorithm based on H.264 integer DCT transform in WSN

2010 ◽  
Author(s):  
Ren Xuejun ◽  
Fang Dingyi
Keyword(s):  
Sensor Node ◽  
Compression Algorithm ◽  
Dct Transform ◽  
Integer Dct ◽  
Integer Dct Transform

2 M-dimensional vector integer DCT transform kernel matrix

2013 ◽  
Vol 21 (7) ◽  
pp. 1891-1897 ◽  
Author(s):  
桑爱军 SANG Ai-jun ◽  
王艇 WANG Ting ◽  
栾晓利 LUAN Xiao-li ◽  
崔海廷 CUI Hai-ting ◽  
陈贺新 CHEN He-xin
Keyword(s):  
Kernel Matrix ◽  
Dimensional Vector ◽  
Dct Transform ◽  
Integer Dct ◽  
Integer Dct Transform

Study on Nearly Lossless Compression with Progressive Decoding

2014 ◽  
Vol 926-930 ◽  
pp. 1751-1754
Author(s):  
Hong Mei Song ◽  
Hai Wei Mu ◽  
Dong Yan Zhao
Keyword(s):  
Compression Ratio ◽  
Image Data ◽  
Lossless Compression ◽  
Image Transmission ◽  
Standard Test ◽  
Compression Algorithm ◽  
Progressive Transmission ◽  
Image Information ◽  
Dct Transform ◽  
Progressive Image Transmission

A progressive transmission and decoding nearly lossless compression algorithm is proposed. The image data are grouped according to different frequencies based on DCT transform, then it uses the JPEG-LS core algorithmtexture prediction and Golomb coding on each group of data, in order to achieve progressive image transmission and decoding. Experimentation on the standard test images with this algorithm and comparing with JPEG-LS shows that the compression ratio of this algorithm is very similar to the compression ratio of JPEG-LS, and this algorithm loses a little image information but it has the ability of the progressive transmission and decoding.

An Improved Algorithm for Color Medical Image Compression Based on DCT

2014 ◽  
Vol 602-605 ◽  
pp. 3114-3118
Author(s):  
Qiang Yang ◽  
Hua Jun Wang ◽  
Xue Gang Luo
Keyword(s):  
Image Compression ◽  
Medical Image ◽  
Color Image ◽  
Compression Algorithm ◽  
Medical Image Compression ◽  
Current Image ◽  
Dct Transform ◽  
The Mean ◽  
Color Image Compression ◽  
Improved Algorithm

Medical image compression technology has great significance in the field of medical image engineering and clinical application. The current image compression technology is mainly for gray image, Few people study on medical image color compression algorithm. This paper presents a compression algorithm for color image based on DCT. First, the algorithm change the color medical image of RGB space to SAT space, this transformation ensures the medical image without distortion, and effectively reduce the mean image of each dimension of component. Then, the algorithm make the DCT transform for color image compression in the SAT space. Experimental shows that the improved algorithm in color medical image compression has achieved good results.

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