Search - DCT

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【matlab】 DCT DL : 0: 实现图像的DCT高通、低通滤波器并与傅里叶变换做比较.有图可见，经DCT低通滤波后，图像变得很模糊。因为DCT是FFT取其实部，能量减少，因此图像变得很模糊，没有经FFT滤波后的效果好。经DCT高通滤波后的图像：经DCT高通滤波后，图像的低频部分被滤除掉，图像变黑，只有边缘的痕迹可见。-The DCT of image high-pass, low pass filter and compared with the Fourier transform.
Update : 2024-04-30 Size : 9131008 Publisher : strong
【matlab】 work DL : 0: matlab中的循环卷积，DFT,DCT，它在数字信号处理方面有很大地作用-circular convolution in matlab, digital signal processing, it has greatly effect
Update : 2024-04-30 Size : 3072 Publisher : 汪照
【Special Effects】 watermark-in-the-image-with-dct DL : 0: 基于DCT域的图像水印算法的实现，DCT变换；图像处理；信息隐藏；数字水印-watermark in the image with dct transfor
Update : 2024-04-30 Size : 119808 Publisher : 张涛
【VHDL-FPGA-Verilog】 dct DL : 0: 基于FPGA的图像压缩算法程序，自己写的，可以参考一下-FPGA-based image compression algorithm, write your own, you can refer to
Update : 2024-04-30 Size : 2048 Publisher : YF
【matlab】 compressed-sensing-procedure DL : 1: 基于压缩感知的图像处理，分别使用二维DCT、FFT和一维dwt变换对图像信号进行稀疏变换，然后使用正交匹配追踪算法进行重构，在进行相应的逆变换-This is a image processing procedure based on compressed sensing which respectively uses two-dimensional DCT, FFT and one-dimensional dwt transform to sparse the image signal and then uses the orthogonal matching pursuit algorithm for reconstruction.
Update : 2024-04-30 Size : 41984 Publisher : 刘会影
【Special Effects】 dct_watermark DL : 0: 一个用 MATLAB 编写的数字水印算法实例基于DCT算法的数字水印的嵌入算法与提取-MATLAB prepared a digital watermarking algorithm based on DCT algorithm instance digital watermark embedding and extraction algorithms
Update : 2024-04-30 Size : 3072 Publisher : 蓝冰
【matlab】 steganography DL : 0: steganography function to using DCT algorithms
Update : 2024-04-30 Size : 1024 Publisher : muhannad
【matlab】 123JEPG-example DL : 0: 图像压缩的matlab算法之JPEG，DCT算法。-matlab jpeg dct
Update : 2024-04-30 Size : 91136 Publisher : king
【2D Graphic】 DCT DL : 0: 多媒体编码，DCT离散余弦变换，CSharp版，Zig-Zag扫描。-This is multimedia encode program--DCT sosine change,programed by CSharp.
Update : 2024-04-30 Size : 30720 Publisher : zheng
【Special Effects】 DCT DL : 0: 生成一个高斯水印后，对待嵌入水印的载体图像进行二维的DCT变换，然后嵌入水印-DCT transition.
Update : 2024-04-30 Size : 21504 Publisher : 王云陈
【Special Effects】 DCT-JPEG-HUFFMAN-WAVELET DL : 1: 含有DCT JPEG HUFFMAN WAVELET图像压缩解压缩matlab的代码示例-With DCT JPEG HUFFMAN WAVELET image compression and decompression matlab code example
Update : 2024-04-30 Size : 101376 Publisher : 江为
【Special Effects】 DCT DL : 0: 对图像进行DCT变换及变换后计算psnr的值-The image transformation and DCT computation of PSNR value after transformation
Update : 2024-04-30 Size : 485376 Publisher : 章建芬
【Special Effects】 DCT DL : 0: 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 to adjust the original image histogram, according to the human visual system, in each block of DCT-DC components on the embedded watermark information, and information in the watermark embedding prior to its scrambling encryption to provide double security guarantees, followed by JPEG compression attacks on the DCT domain robustness of tests to demonstrate the anti-attack capability of DCT.
Update : 2024-04-30 Size : 1024 Publisher : zhangxibin
【Special Effects】 DCT DL : 0: 数字信号处理实验，DCT图像压缩，内含有matlab实验m文件以及实验报告，供大家参考。-Digital signal processing experiment, DCT image compression, contains matlab experiment m documents and the experiment report for your reference.
Update : 2024-04-30 Size : 64512 Publisher :
【matlab】 dct-precoded-SLM-method-for-PAPR-reduction DL : 0: dct precoded SLM method for PAPR reduction High Peak to Average Power Ratio (PAPR) is still a most important challenge in Orthogonal Frequency Division Multiplexing (OFDM) system. In this paper, we propose a Discrete Cosine Transform (DCT) precoding based SLM technique for PAPR reduction in OFDM systems. This technique is based on precoding the constellation symbols with DCT precoder after the multiplication of phase rotation factor and before the Inverse Fast Fourier Transform (IFFT) in SLM-OFDM System.
Update : 2024-04-30 Size : 234496 Publisher : MAHESH
【Special Effects】 dct DL : 0: DCT is one of the novel normalization techniques for illumination variation. The technique is in- corporated by truncated the low frequency DCT Coecients. In face image illumination, changes slowly compared to re ectance. As a result illuminations are mainly in Low frequency components. Since we attempt to recognize face image by its re ectance characteristic, illumination variations can be reduced by removing low-frequency components.
Update : 2024-04-30 Size : 1024 Publisher : murthy
【Compress-Decompress algrithms】 dct DL : 0: dct,dft,dht三种图像压缩变换之间的比较-DCT, dft, the dht three kinds of image compression transformation
Update : 2024-04-30 Size : 29444096 Publisher : 纪亚萍
【Special Effects】 DCT DL : 0: 将一幅图像先进行分成8X8块，然后对每个8X8块进行DCT变化，最后将变换后的图片进行分层，重新显示-Will an image to 8 X8 into pieces, then to every 8 X8 block DCT change, finally will transform the images after the layered, displayed again
Update : 2024-04-30 Size : 225280 Publisher : 翟明
【Special Effects】 DCT-domain-image-water DL : 0: 通过matlab实现DCT域图像水印技术，内容详细，通俗易懂，可供大家使用，互相学习。-Through matlab DCT domain image watermarking technology, detailed, easy to understand, and available for everyone to use, learn from each other.
Update : 2024-04-30 Size : 115712 Publisher : 辛力
【Special Effects】 lsb-and-dct-markedarecover-code DL : 0: 两种方法的水印嵌入和提取，lsb和dct，代码易懂，有部分注释-lsb and dct marked&recover code
Update : 2024-04-30 Size : 16843776 Publisher : catherine

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