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資料壓縮的原理與應用DCT域上影像縮小1by4的C程式-Data Compression Theory and Application of DCT domain image of the C program to narrow the 1by4
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JPEG压缩编码,将输入的BMP图像进行DCT变换、霍夫曼编码后输出码流。-JPEG compression coding, the input BMP image DCT, Huffman encoded output stream.
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研究表明,构成K一L变换矩阵的向量也就是ToePhtz矩阵的特征向量。与此同时,离散
余弦变换矩阵逼近于ToePutz矩阵的特征向量矩阵,所以离散余弦变换矩阵与自然图像的
K一L变换矩阵十分相似。经过离散余弦变换后的变换系数块的协方差矩阵Cy非常接近对角
阵,即除了对角线元素以外,其它很多元素都近似为0,并且在左上角集中了主要能量。这
反映了自然图像大部分区域变化不大,亮度突变只占少数,即图像能量以低频成分为主的特
性。通过变换后的量化,舍弃对视觉效果影响较小的次要信息,可达
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DCT变换:变换域系数选取采用阈值编码,:阈值越小,图像恢复效果越好,但压缩效果差,一般取在5-10 即可很好的获得恢复图像信息。-DCT transform: transform domain coefficients selected using the threshold coding: the smaller the threshold value, the better the image restoration, but the compression is poor, and ge
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实现jpeg压缩和解压缩,将彩色图像进行颜色空间转换、对不同的颜色分量进行不同的采样、对于3个分量进行8×8的DCT变换、对DCT系数矩阵按照JPEG推荐的量化表进行量化;对量化后的系数进行Z形扫描,最后进行熵编码,形成码流,计算比特数,和压缩比。解压从量化后的DCT系数表开始逆向进行-Jpeg compression and decompression, the color image is a color space conversion, the different color compo
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2D-DCT变换是视频压缩中的常用变换[2]。在压缩过程中,将一幅图像分成许多4*4的小块进行变换。-2D-DCT transform is often used in video compression transformation [2]. In the compression process, an image is divided into many small blocks of 4* 4 transform.
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VC++图像处理及源码包(大全)包括下列内容:1.数字图像获取,处理及实践应用电子书 2.数字图像获取,处理及实践应用电子书分章节源码 3.书中提及的各种算法的综合源码。压缩包里面包括的算法代码有:分章节源码内容:内容:对比度增强、灰度变换法、直方图修整法、图像平滑、图像锐化、伪彩色和假彩色增强;逆滤波复原、维纳滤波方法;傅立叶变换、离散余弦变换(DCT)、沃尔什变换、基于特征向量的变换、霍特林(Hotelling)变换、SVD变换、小波变换、Mallat算法;霍夫曼(Huffman)编码、算术
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Skew detection and correction is very important task before pre-processing of an image and it is a major problem in scanned documents, if it
not detected correctly it will lead wrong result in future during image analysis. During the scanning of th
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Skew detection and correction is very important task before pre-processing of an image and it is a major problem in scanned documents, if it
not detected correctly it will lead wrong result in future during image analysis. During the scanning of th
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利用dct变化对图像进行压缩,可以根据感谢量化矩阵改变压缩率.-By using DCT changes on image compressing, can according to thank quantization matrix change compression ratio.
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基于DCT的JPEG图像压缩处理程序,能够实现bmp格式RGB图像编码解码,使用编码函数使得算法简单易懂,灵活使用哈夫曼编码表,减少传输数据-DCT compression processing program based on JPEG images can be achieved bmp format RGB image encoding and decoding, encoding function makes the algorithm easy to understand, flexi
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实验2绿叶变色,实验3图像数字化显示,实验4图像类型转换,实验5对比度增强,实验6直方图均衡化和规定化,实验7噪声添加和空域滤波,实验8边缘增强和边缘检测,实验9彩色图像增强,fft,dct,dwt变化及压缩,滤波器,实验20运动退化和维纳波复原,实验21图像的几何畸形校正等实验的代码和报告-Experiment 2 leaves change color, 3 digital image display, the image type conversion, 4 5 contrast enha
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对图像进行JPEG压缩,通过DCT变化,量化,zigzag扫描,熵编码(JPEG compression of the image, through the DCT changes, quantization, zigzag scanning, entropy coding)
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