Location:
Search - matlab dct idct
Search list
Description: 对原始灰度图像 Lena_gray.bmp进行图像压缩实验
1．对此图进行 8×8 DCT 变换后，分别只保留 DC系数，以及保留前 4、8、16 个变换系数(DC＋AC) ，然后再分别进行 IDCT 变换，比较结果。
2．可以使用 Matlab - Image Processing Toolbox 中的函数实现。
-gray image of the original image compression Lena_gray.bmp an experiment. This diagram 8 8 DCT, the only difference reservations DC coefficient, and the preservation of the former 4, 8 or 16 DCT coefficients (DC + AC), and then separately IDCT transformation, the results of the comparison. 2. Using Matlab-Image Processing Toolbox to achieve the function.
Platform: |
Size: 1036 |
Author: 朱晓路 |
Hits:
Description: 普通DCT，快速DCT,快速IDCT算法的实现 vc程序 希望你喜欢！-ordinary DCT, fast DCT and IDCT algorithm for the rapid realization vc procedures hope you like!
Platform: |
Size: 137216 |
Author: ddda |
Hits:
Description: 对原始灰度图像 Lena_gray.bmp进行图像压缩实验
1．对此图进行 8×8 DCT 变换后，分别只保留 DC系数，以及保留前 4、8、16 个变换系数(DC＋AC) ，然后再分别进行 IDCT 变换，比较结果。
2．可以使用 Matlab - Image Processing Toolbox 中的函数实现。
-gray image of the original image compression Lena_gray.bmp an experiment. This diagram 8 8 DCT, the only difference reservations DC coefficient, and the preservation of the former 4, 8 or 16 DCT coefficients (DC+ AC), and then separately IDCT transformation, the results of the comparison. 2. Using Matlab-Image Processing Toolbox to achieve the function.
Platform: |
Size: 1024 |
Author: 朱晓路 |
Hits:
Description: 上传的是C编写的DCT算法，在图象处理方面常用到，希望对你有用-upload is prepared by the C DCT algorithm, the image processing used to the hope that useful to you
Platform: |
Size: 1024 |
Author: 廖和 |
Hits:
Description: Sobel算子：是一种空域微分算子，可以通过它锐化图象。
将图象分块(8*8),作DCT变换,并作IDCT：DCT是一种可分离图象变换，用来图象压缩编码。-Sobel Operator : airspace is a differential operator, through its image sharpening. Image will block (8* 8), for the DCT and IDCT for : DCT is a separable Image Transform, used to image compression coding.
Platform: |
Size: 2048 |
Author: xuhua |
Hits:
Description: dct and idct for image.matlab实现信息序列的嵌入和提取-dct and idct for image.matlab realize embedded information and extract sequence
Platform: |
Size: 2048 |
Author: wubaishan |
Hits:
Description: 加深对图像变换的理解。计算图像的离散余弦变换J；设置不同的量化门限，计算其逆变换IDCT，并显示。-Deepen the understanding of the image transform. Calculating the discrete cosine transform image J setting different quantization threshold to calculate the inverse transform IDCT, and displayed.
Platform: |
Size: 28672 |
Author: Ashtray |
Hits:
Description: 图像变换 将图象分块(8*8)，作DCT变换，并作IDCT：DCT是一种可分离图象变换，用来图象压缩编码，IDCT用来解压缩-Image transform to image sub-block (8* 8), for the DCT transform, and IDCT: DCT is a separable transform image to image compression coding, IDCT used to extract
Platform: |
Size: 17408 |
Author: 陈杰 |
Hits:
Description: 已知两个不同图像块亮度数据如下：
（1）分析DCT原理，采用DCT方法，编程并计算相应的DCT系数，分析系数分布特点。
（2）依据视觉特性分析量化表步长的分布特点，完成DCT系数量化。
（3）采用Z形扫描，实现输出数据的统计编码，形成Video stream。
（4）采用IDCT重建图像亮度数据，计算SAD大小，分析产生误差的原因及采用DCT进行数据压缩的原理。（ ）
（5）分别利用左上角1、3、6个系数重建图像，计算相应的SAD，并由此分析直流和低频系数的重要性。
-Known brightness of two different image data block is as follows: (1) Principles of analysis of DCT, the DCT method, program and calculate the corresponding DCT coefficient, analysis of distribution coefficients. (2) quantitative analysis based on visual characteristics of the distribution of long-form features step-by-step to complete the DCT coefficient quantization. (3) the use of Z-scan output data to achieve statistical encoding, the formation of Video stream. (4) the use of the reconstructed image brightness IDCT data to calculate the SAD size, analysis of the causes of errors and the use of DCT for the principle of data compression. () (5), respectively, a factor of 1,3,6 using the upper left corner of the reconstruction of images, calculating the corresponding SAD, and the resulting analysis of DC and the importance of low-frequency coefficients.
Platform: |
Size: 1024 |
Author: 张元 |
Hits:
Description: DCT变换的实现，快速变换IDCT实现，VC工程-The realization of DCT transform, fast transform IDCT realization, VC works
Platform: |
Size: 425984 |
Author: 流星 |
Hits:
Description: compression with dct&idct
Platform: |
Size: 88064 |
Author: saeed |
Hits:
Description: 这段程序是前面dct程序嵌入的逆过程，即进行信息的提取，从而获得置乱原始信息-Dct in front of this program is the reverse process of embedding process, namely, the extraction of information, thereby scrambling the original information obtained
Platform: |
Size: 1024 |
Author: blazer |
Hits:
Description: 2D-DCT 压缩图像后，通过QPSK,AWGN信道编码传输后，IDCT解压缩回原始图像，适用于任何图像-Using DCT to compress the orginal image, I use zigzag program, quantization, dct compression, then change the vector to bineary bit to pass through the QPSK channel. And from the binary array, I use IDCT to reconstructe the orignial image. working perfectly.
Platform: |
Size: 4036608 |
Author: Jackie |
Hits:
Description: 将图象分块(8*8)，作DCT变换，并作IDCT：DCT是一种可分离图象变换，用来图象压缩编码，IDCT用来解压缩。-The image sub-block (8* 8) for the DCT transform, and to make IDCT: DCT is a separable image transformations, is used to image compression coding, IDCT is used to decompress.
Platform: |
Size: 7168 |
Author: zy |
Hits:
Description: 对原始灰度图像进行图像压缩，对此图进行 8×8 DCT 变换后，分别只保留 DC系数，以及保留前 4、8、16 个变换系数(DC＋AC) ，然后再分别进行 IDCT 变换
-The original gray image compression, this map for 8 × 8 DCT transform, respectively, to retain only the DC coefficient, and to retain the former 4,8,16 months transform coefficients (DC+ AC), and then separately IDCT transform
Platform: |
Size: 1024 |
Author: potato |
Hits:
Description: It is a laboratory work from bsuir, where foto
can be normilized by brightness, contrast, algorithm JPEG, dct idct
Platform: |
Size: 1286144 |
Author: Andrew |
Hits:
Description: steganography dct image algorithm. very useful for implementing dct and idct concepts in matlab-steganography dct image algorithm. very useful for implementing dct and idct concepts in matlab......
Platform: |
Size: 4096 |
Author: varun |
Hits:
Description: 将图片进行8*8块的dct变换，以及8*8块的反变化恢复原图像-use 8*8 block dct to chang image, and use 8*8 block idct to renew image.
Platform: |
Size: 216064 |
Author: jiang jianxing |
Hits:
Description: 图像处理的一些基本变换，FFT,IFFT,DCT,IDCT，小波变换，哈夫曼编码等的MATLAB程序代码。-Some basic image processing transform, FFT, IFFT, DCT, IDCT, wavelet transform, Huffman coding MATLAB program code.
Platform: |
Size: 838656 |
Author: Hopre |
Hits:
Description: generate mimo-ofdm using dct and idct matlab source code
Platform: |
Size: 12288 |
Author: ismi |
Hits: