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Description: vc控制台实现哈夫曼编码，使用256lena图做测试，调试并通过。使用方法：将压缩包中文件解压到E:\HuffmanCoding_src中即可。运行En_Decode.dsw，读者也可以对其他文件做测试。-vc console realize Huffman encoding, the use of 256lena plans to do testing, debugging and do pass. Usage: to extract the compressed package file to E: HuffmanCoding_src in the can. Running En_Decode.dsw, readers can also make the test on other documents.
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Size: 52224 |
Author: 张三 |
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Description: 1是对图像进行直方图均匀化，2，3分别是用Laplacian 锐化算子（分α = 1和α = 2两种情况）对256×256 大小、256级灰度
的数字图像lena.img 进行锐化处理，显示处理前、后图像。
-1 is the histogram of image uniformity, 2,3 are the Laplacian sharpening operator with a (sub α = 1 and α = 2 both cases) on the 256 × 256 size, 256 gray level digital image lena.img sharpening processing, display processing before and after images.
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Size: 1024 |
Author: smith |
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Description: 对bmp图像进行平滑处理之邻域平均，已写明具体算法，直接用256*256灰度lena图，可以进行进一步改进-Bmp image smoothing of values among the filtering, has been expressed as a specific algorithm, the direct use of 256* 256 gray lena map, can be further improved
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Size: 2048 |
Author: lixiang |
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Description: 对bmp图像进行平滑处理之中值滤波，已写明具体算法，直接用256*256灰度lena图，可以进行进一步改进-Bmp image of the median filter to smooth processed
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Size: 2048 |
Author: lixiang |
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Description: 对bmp图像进行平滑处理之高斯模版，已写明具体算法，直接用256*256灰度lena图，可以进行进一步改进-Bmp image smoothing of the Gaussian template, has been expressed as a specific algorithm, the direct use of 256* 256 gray lena map, can be further improved
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Size: 2048 |
Author: lixiang |
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Description: 该目录包含了基于可移植的C语言的数字水印算法的代码。这些代码具有示范
性的意义，且有一定的鲁棒性。
需要安装NetPGM的程序包（用来存取pgm格式图像），然后才能在linux下面编译。
NetPGM是图像文件的输入/输出软件包。可以在网上搜索得到。我们已经对
256灰度级，512×512大小的图像进行了测试。程序编译后的调用格式如下（以encode为例）：
wm_cox_e -s cox.sig -o wm_image.pgm image.pgm
其中，-s表示要添加的水印信号，cox.sig是信号文件。
-o表示输出图像文件名为wm_image.pgm，
image.pgm为输入文件名。
几个辅助程序：
cmp_pgm 计算差分图像，PSNR等
cmp_dct 计算全帧DCT域的差分图像
cmp_dct8x8 计算8×8大小的DCT域差分图像
比如说，为了产生两个PGM图像的差分图像并计算它们的PSNR，命令如下：
cmp_pgm -p -i original.pgm -o diff.pgm watermarked.pgm
产生水印信号：
gen_cox_sig -o cox.sig
程序将产生适合512×512大小，8-bit灰度的pgm图像的水印信号。
水印提取：
wm_cox_d -s cox.sig -i lena.pgm -o cox.wm cox_lena.pgm
请注意，cox的算法需要原始图像做参考来提取水印，压缩后的水印将存储在cox.wm中。-This directory contains the C-based portable digital watermarking algorithm code. The code has a demonstration
Of meaning, and there is a certain degree of robustness.
NetPGM need to install the package (to access the pgm format images), and then to compile in linux below.
NetPGM is the image file input/output package. Can search by. We have already
256 gray level, 512 × 512 size images were tested.
Procedure call format, compiled as follows (in encode an example):
wm_cox_e-s cox.sig-o wm_image.pgm image.pgm
Which,-s that you want to add the watermark signal, cox.sig is the signal file.
-O said output image file name wm_image.pgm,
image.pgm for the input file name.
Several auxiliary programs:
cmp_pgm calculate the difference image, PSNR, etc.
cmp_dct full frame DCT domain calculation of difference image
cmp_dct8x8 calculate the size of 8 × 8 DCT domain differential image
For example, in order to produce two PGM images and calculate their differ
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Size: 19456 |
Author: sylvia |
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Description: 将LENA图像分别进行4倍和16倍减采样并对减采样的效果进行描述 将LENA图像转换成256、62、32、8、2 级灰度图像，并对灰度减小后的图像效果进行-Will LENA image separately and 16 times as much as four times and reduce sampling the effects of reducing sampling the LENA images into 256, 62, 32, 8, 2 levels of gray image, and reduce the image of the original after effects
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Size: 453632 |
Author: 刘赤利 |
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Description: Pyramid.zip包含
1、pyramid.fig界面
2、高斯金字塔通过GPReduce.m函数实现
拉普拉斯金字塔由GPExpand.m函数实现
3、用imshow()显示拉普拉斯金字塔时，如果图像矩阵数据类型为double，会显示为彩色；而通过uint8()将类型强制转换为8位无符号整数，图像显示就为黑白了。
4、采用256*256的lena彩色图像-Pyramid.zip coantain
1、pyramid.fig interface
2、implemented by GPReduce.m and GPExpand.m
3、use 256*256 lena color picture
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Size: 74752 |
Author: zbx |
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