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是进行JPEG图形压缩算法的代码,对图形进行DCT变换-is JPEG image compression algorithm code, the graphics DCT
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DCT变换用于JPEG压缩编码的实验,实验目的:掌握DCT变换的基本运算和JPEG编码的基本过程-DCT transform coding for the JPEG compression experiments Objective: To master the basic computing DCT transform coding and JPEG basic process
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This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN -
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JPEG 静态图像压缩
各文件功能说明如下:
1) JPEG压缩程序:gendat.exe
2) 为压缩后的数据加上JPEG文件头的程序genjpg.exe
3) 解JEPG压缩程序extrdat.exe
其中:(1)的输入参量是需要生成的压缩文件的名字。
主程序流程为:
a) 程序初始化,读取文件名称、原始图像数据等基本数据;
b) 从AC.TAB和DC.TAB两个文件生成AC表和DC表,存入数组
c) 以8×8为样本单位进行DCT变换
d) 以8×8为
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此源代码,是一个一种基于DCT的jpeg图像压缩编码算法的MATLLAB实现的程序源码,对做jpeg压缩的朋友会非常有帮助
-This source code is a one the MATLLAB jpeg images in the DCT-based compression algorithm to achieve the program source code and do jpeg compression friends would be very helpful
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基于DCT压缩前后不变量,编写的抗JPEG压缩的数字图像认证证水印算法,具有良好的抵抗压缩、剪切、篡改等性能的水印仿真程序
-Invariants based on before and after the DCT compression, digital image authentication certificate watermark algorithm written anti-JPEG compression with good resistance to compression,
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The JPEG compression scheme is divided into the following stages:
1. Transform the image into an optimal color space.
2. Adjust Aspect Ratio 16:9
3. Digitization Scheme 4:2:0.
4. Apply a Discrete Cosine Transform (DCT) to blocks of pixels
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基于DCT的JPEG图像压缩编码算法的MATLAB实现
希望可以帮到大家-DCT-JPEG image compression coding algorithm MATLAB-based hope you can help
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完成bmp文件到jpeg文件的压缩,使用DCT变换然后进行游程编码以及哈弗曼编码 实现完整的jpeg压缩过程,最后写成jpeg文件-Bmp files to jpeg complete file compression
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DCT base compression program for JPEG compression
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