搜索资源列表
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Image Compression
A collection of simple routines for image compression using different techniques.
BTCODE:
Image compression Using Block Truncation Coding.
PYRAMID:
Image compression based on Gaussian Pyramids.
DCTCOMPR:
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0下载：
Image Compression
A collection of simple routines for image compression using different techniques.
BTCODE:
Image compression Using Block Truncation Coding.
PYRAMID:
Image compression based on Gaussian Pyramids.
DCTCOMPR:
I
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视频压缩中运动估计算法的MATLAB程序，基于8×8 块的全搜索运动估计算法。-Video compression motion estimation algorithm in the MATLAB program, 8 × 8 block-based full search motion estimation algorithm.
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分块有损压缩图像忽略了块间相关性，重构时会产生块效应，该文提出一种空域自适应去块效应算法。对块边缘采用方向自适应
有理滤波，以弱化块效应。根据块的内部活动性将图像块分成平坦块和纹理块2 类，利用基于方差的空域检测方法检测出平坦块，并对平
坦块进行邻块边缘自适应平滑。实验结果表明，该算法有效去除了块效应，一定程度上提高了信噪比，算法简单且鲁棒性较好。-Block lossy compression image ignores the inter-block correlation, Rec
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摘 要：基于块的运动估计是视频压缩国际标准中广泛采用的关键技术。在对目前运动估计快速块匹配算法研究的基础上，描述了运动估计
的原理；揭示 了在图像质量、搜索速度和压缩码率等方面提高算法效率时存在的3 类主要问题 ：初始搜索点的选择、匹配准则和搜索策略 ；
分另 q 阐述了目前常用的解决这3 类问题的方法，并进行了比较和分析 ；提出了对运动估计算法的一些展望。-Abstract: The block-based motion estimation is a video compress
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Abstract- H.264/AVC is becoming a popular video codec for
its better compression ratio, lower distortion and applicability
to portable electronic devices. Thus, issues of copyright
protection appropriate for this standard become very
importan
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基于DCT的数字水印处理技术，本水印处理过程利用图像的缩放技术和调整原始图像的直方图，根据人眼视觉特性,在每个DCT变换块的DC分量上嵌入水印信息，并且在水印信息嵌入之前,对其进行置乱加密,提供双重安全保证，接着通过JPEG压缩攻击对DCT域的鲁棒性进行测试，证明了DCT的抗攻击能力。-DCT-based digital watermarking technique, the watermark processing technology and the use of image scaling
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基于分块可压缩传感的图像重建，里面包括contourlet、DWT、DDWT、DCT，图像压缩传感与重建。-Based on the sub-block compressible sensing image reconstruction, which include the Contourlet DWT DDWT,, DCT image compression sensing and reconstruction.
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基于DCT变换的灰度图像压缩技术的几个程序段！-Several block DCT-based grayscale image compression technology.
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图像压缩编码相关代码，实现基于空域可变块矢量量化的图像压缩功能-Image compression coding code airspace variable block vector quantization based image compression
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0下载：
Image Compression
A collection of simple routines for image compression using different techniques.
BTCODE:
Image compression Using Block Truncation Coding.
PYRAMID:
Image compression based on Gaussian Pyramids.
DCTCOMPR:
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One of the major drawbacks of the block-based DCT compression methods is that they may result in visible artifacts at block boundaries due to coarse quantization of the coefficients. -Simulation results show that the proposed algorithm significantly
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Blocking artifacts continue to be among the most serious defects that occur in images and video streams compressed to low bit rates using block discrete cosine transform (DCT)-based compression standards (e.g., JPEG, MPEG, and H.263)
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基于主成分分析的图像压缩，通过传入图像矩阵、主成分配置、子块大小来进行PCA处理，可得到压缩重构的图像矩阵、压缩比、贡献率信息-Image compression based on principal component analysis, by passing the image matrix, the main component configuration, the sub-block size to PCA processing, compression can be obtained
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该程序可以真正自动实现图像压缩的算法——分形块编码。分形块编码的依据是图像局部块之间存在相似性。-The program can really automatically achieve the image compression algorithm- fractal coding. Fractal block coding is based on the existence of similarity between the local image block.
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提出一种基于 QR 码的自适应抗打印扫描盲水印算法。方法 首先对载体 QR 码进行三级小
波变换，并对低频部分进行 4×4 分块 Schur 分解，然后利用子块酉矩阵的系数差值的稳定性，将二值
水印信息自适应嵌入到载体 QR 码中，最后对含水印 QR 码打印扫描并提取出水印信息。同时，算法实 现了盲提取。结果 算法能较好抵抗打印扫描攻击，并对高斯噪声、椒盐噪声、斑纹噪声、泊松噪声、
JPEG 压缩等攻击具有较强的鲁棒性。结论 算法具有较强的抗打印扫描性能，可以广泛应用于数字产品
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