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8*8矩阵dct变换以及量化 反量化和反dct变换
- 8*8矩阵dct变换以及量化 反量化和反dct变换,8* 8 transform and quantization matrix dct quantization and anti-anti-dct transform
dct.rar
- 本人根据公式用VC++做出的DCT变换源码，解说清楚。转换矩阵8*8，计算结果与MATLAB计算结果比较，两者几乎一样(相差仅 0.001)，估计是计算误差，经过我的实践证明并不影响使用。,According to the formula I use VC++ source code to the DCT transform, to clarify. Conversion matrix 8* 8, the calculation results compared with the MATLAB
workingjpeg.zip
- JPEG DCT based baseline method which divides the image into 8x8 blocks and quantize anthen entropy coded.,JPEG DCT based baseline method which divides the image into 8x8 blocks and quantize anthen entropy coded.
DCT.rar
- 利用matlab的DCT2函数，对图像做变换并压缩。并用8*8对图像分块，对每一块计算均方值作为阈值。,DCT2 use the matlab function, and transform the image so compressed. And 8* 8 image block, a calculation of each mean square value as a threshold.
dct
- 利用DCT进行图像压缩（首先将图像分割成8×8的图像，对每个子图像进行DCT，这样每个子图像有64个系数，舍去50％小的变换系数，进行2：1的压缩。）-The use of DCT for image compression
DCT
- 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.
DCT
- 用于视频图像编码的8×8DCT变换，可用于MPEG4.H263等VHDL编程-For video images encoded 8 × 8DCT transform, can be used to MPEG4.H263 such as VHDL Programming
dct
- 8*8DCT,基于流水线设计，比较经典，可以用于JPEG，也可以用于H.264（需改为4*4）-8* 8DCT, based on the pipeline design, compare a classic, can be used in JPEG, can also be used for H.264 (to be replaced 4* 4)
dctwatermark
- DCT水印，简单实用，基于8*8分块的DCT域水印嵌入算法水印图像为64*64-DCT watermark, simple and practical, based on the 8* 8 sub-block DCT domain watermark image watermark embedding algorithm is 64* 64
DCT
- 一个实用的对8×8的图像做DCT变换的源代码-A practical image of the 8 × 8 to do the source code for DCT-
dct
- 在一个图像块中调整两个(或多个) DCT系数的相对大小。将描述一个使用数字图像作为载体的系统。在编码处理中，发送者将载体图像分成8×8的像素块，每一块只精确地编码一个秘密信息位。嵌入过程开始时，首先伪随机地选择一个图像块bi，用它对第i个消息比特进行编码。令Bi=D{bi}为DCT变换后的图像块。 在通信开始前，发送者和接收者必须对嵌入过程中使用的两个DCT系数的位置达成一致，让我们用(u1,v1)和(u2,v2)来表示这两个索引。这两个系数应该相应于余弦变换的中频，确保信息保存在信号的
DCT
- 读入一幅256*256图像，将它分成8*8pixel的若干块，对每块做DCT变换，保留Z型顺序的若干变换系数，进行IDCT重构图像，计算重构图像的信噪比-Reading a 256* 256 image, it will be divided into several blocks of 8*8 pixel, keep each optimal Z transformation of sequence number, IDCT transform coefficient calculation
DCT
- ce code permet de cacluler les coefficiants de la dct dans un block 8*8 aisni selectionner les coefficients par un balyage zigzag
A-DCT-watermarking-algorithm
- 提出了一种在数字图像上实现的盲水印算法, 嵌入的水印是64 64 8 bit 灰度图。该算 法用宿主图像的8 8 分块的DCT 域低频对应系数, 进行量化取余的方法嵌入水印。-Proposes a new digital image watermarking algorithm implemented on the embedded watermark is 64 64 8 bit gra
MATLAB-dct-and-idct
- 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.
DCT
- DCT 8*8 4:2:0 Quantization
verilog dct
- 其使用模块的代码风格来编写，能够8点dct的转换(Its use of the module's code style to write, to 8 dct conversion)
dct
- 程序主要用于dct图片分块，包括8*8，16*16,32*32，64*64分块等等。(The program is mainly used to block DCT pictures, including 8*8, 16*16,32*32, 64*64 block, and so on.)
8-8DCT变换verilogHDL代码
- DCT变换实现图像压缩及嵌入水印等,内含测试文件及DCT算法讲解(Image compression and embedding watermark by DCT transform)
DCT
- 对每类中的每幅图片进行DCT变换（8*8）分块并对保留的DCT系数进行反DCT变换，得到重建的图象，显示原图像和重建图像进行对比，并计算出与原图对比的PSNR值。(Each picture in each class is divided into DCT transform (8*8) and the reserved DCT coefficient is inverse DCT transform. The reconstructed image is obtained. The origi