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also using vector quantization on image by using matlab program to achieve a good compression ratio
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作业一
要求
用C语言或者VC,VB,Matlab或其他语言完成如下实验:
1)打开一个BMP文件
2)将其局部区域的灰度值进行改变
3)另存为一个新的BMP文件
要求显示出原BMP图像和新BMP图像。
作业二
要求
1. 编程实现图像傅立叶高通、低通滤波。
2. 尝试傅立叶压缩。
作业三
要求
编程实现图像DCT高通、低通滤波。并与傅里叶变换比较。
作业四
要求
找一幅曝光不足的灰度(或彩色)图像,按照直方图均衡化方法进行处
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MATLAB通过DCT对图像进行区域编码以及门限编码压缩-MATLAB through the DCT to do image region code and threshold coding compression
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基于matlab的JPEG压缩源码,含压缩与解压缩,还有与原图的对比测试。-Matlab-based JPEG compression source, including compression and decompression, as well as comparison with the original image.
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图像处理MATLAB程序包括灰色二进制压缩和其他一些方法和其他一些
-MATLAB image processing procedures including gray binary compression
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此代码是对JPEG图像二次压缩所产生的JPEGGhost进行的Matlab仿真。适合图像取证初学者学习。-This code is a JPEG image generated by the secondary compression JPEGGhost Matlab simulation. Suitable for image forensics for beginners to learn.
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基于DWT的彩色图像数字水印的matlab实现水印的嵌入与提取,能抵抗噪声,剪切,压缩攻击-Based on DWT color image digital watermark matlab watermarking embedding and extracting, can resist noise, shear and compression attack
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基于DWT的彩色图像数字水印的matlab实现水印的嵌入与提取,并对其进行arnold置乱,能抵抗噪声,剪切,压缩攻击-Based on DWT color image digital watermark matlab watermarking embedding and extracting, and carries on the Arnold scrambling, can resist noise, shear and compression attack
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1了解离散余弦正变换和逆变换的原理;
2理解离散余弦变换系数的特点;
3了解离散余弦变换在图像数据压缩中的应用;
4通过本实验掌握利用MATLAB编程实现数字图像的余弦变换;
-1 for the discrete cosine transform and inverse transform principle understand the characteristics of the discrete cosine transform coefficients 3 for
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根据JPEG压缩编码的基本压缩原理编写JPEG仿真程序,利用MATLAB软件对程序进行运行调试,验证了JPEG压缩编码算法的可行性。通过比对输出图像压缩前后实际效果,探讨压缩比,峰值信噪比等评价图像数据压缩程度及压缩质量的关键参数,对JPEG压缩编码算法的实用性和优越性进行了研究。- I have JPEG compression in-depth study on the basic principles of image data compression based on JPEG emul
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本代码由matlab语言编写,实现了jpeg算法,主要为了说明基本的JPEG功能。经过DCT变化,量化,进行DPCM编码,然后之字形扫描AC系数,进行行程(LZW)编码。 显示原始图象和经编码解码后的图象,显示压缩比,并计算均方根误差。-The code consists of matlab language, to achieve a jpeg algorithm, mainly to illustrate the basic functionality of JPEG. After chan
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基于稀疏表示的正交最小二乘法,使用的语言是matlab,应用比较广阔,设计信号处理中的信号回归,图像处理的压缩等。-Sparse representation based on orthogonal least squares method, the language used is matlab, relatively broad application, design signal processing signal return, image processing, compression
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在图像处理实验中,有时需要对图像进行精确质量因子的JPEG压缩,而photoshop和一般的图像处理软件并不具备,本程序利用matlab实现该功能,并支持批处理(将待处理图像放入src文件夹,dst文件夹为输出)-In image processing experiments, sometimes the need for accurate image quality factor of JPEG compression, and photoshop and general image proc
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code source compression image using Haar wavelet
By Arash Fattahi, Omid Aladini {r_ash,omid}@cs.sharif.edu
To compress an image use this command in MATLAB:
haar_compression(FILE_NAME,COMP_LEVEL,MOSAIC_SIZE)
example:
haar_compres
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图像dct变换,量化,f3隐写,压缩,解压,使用matlab实现-Image DCT transform, quantization, F3 steganography, compression, decompression, using MATLAB to achieve
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This program uses the operating environment written in MATLAB, nonlinear compression on the perception of image reconstruction to achieve, the focus is KSVD dictionary compilation.
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基于MATLAB利用小波变换对图像进行处理,包括压缩、增强、融合、去噪-Based on MATLAB wavelet transform for image processing, including compression, enhancement, integration, de-noising
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用matlab实现MPEG压缩编码,对图像编码率失真性能进行分析,比较不同类型静态图像编码效率。
-Using Matlab to achieve MPEG compression coding, image coding rate distortion performance analysis, compare the different types of static image coding efficiency.
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利用小波变换对图像进行二次压缩处理的MATLAB程序-A MATLAB program for secondary compression of image using wavelet transform
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