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JPEG 标准的最新进展是 1996 年开始制定, 2001 年正式成为国际标准的 JPEG 2000 。与 JPEG 相比, JPEG 2000 作了大幅改进,其中最重要的是用离散小波变换( DWT )替代了 JPEG 标准中的离散余弦变换。在文件大小相同的情况下, JPEG 2000 压缩的图像比 JPEG 质量更高,精度损失更小。作为一个新标准, JPEG 2000 暂时还没有得到广泛的应用,不过包括数码相机制造商在内的许多企业都对其应用前景表示乐观, JPEG 2000 在图像压缩领域里
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基于wavelet和bandelet的spiht图像压缩!,And wavelet-based image compression spiht the bandelet!
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小波变换是一种快速发展和比较流行的信号分析方法, 其在图像处理中有非常重要的应用, 包括图像压缩, 图像去噪, 图像融合, 图像分解, 图像增强等。小波分析是傅立叶分析思想方法的发展与延拓。除了连续小波
(CWT)、离散小波(DWT), 还有小波包avelet Packet)和多维小波。本文主要介绍小波变换的发展及其在图像处理、的应用-Wavelet transform is a fast-growing and more popular method of signal analysis,
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讲解了 MATLAB语言环境下
图像压缩和图像融合方面的基本方法和基于小波变换的图像分解与重构。-Explained the MATLAB language environment, image compression and image integration of the basic methods and wavelet-based image decomposition and reconstruction.
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双树复小波变换具有平移不变性、方向选择性等特点,适合进行图像压缩,优于传统离散小波变换方法。-The DT-CWT is suitable to image compression processing because of its shift invariance and directional selectivity. It is preferable to traditional Discrete Wavelet Transform(DWT).
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VERILOG CODE FOR DWT IMAGE COMPRESSION
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PERCEPTUAL OPTIMIZATION OF WAVELET IMAGE COMPRESSION
NASA’s extensive image compression requirements may be met in part by the use
of wavelet techniques.1 Wavelets form a large class of signal and image transforms,
generally characterized by de
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Scaling, wavelets, image compression, and
encoding
NASA’s extensive image compression requirements may be met in part by the use
of wavelet techniques.1 Wavelets form a large class of signal and image transforms,
generally characterized by de
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基于分块可压缩传感的图像重建,里面包括contourlet、DWT、DDWT、DCT,图像压缩传感与重建。-Based on the sub-block compressible sensing image reconstruction, which include the Contourlet DWT DDWT,, DCT image compression sensing and reconstruction.
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提出一种基于DWT和DCT域的有意义二值图像数字水印算法 利用Arnold变换对水印序列进行置乱,消除象素的空间相关性,增加水印的安全性 而结合小波波变换和离散余弦变换的特性,将水印信息嵌入到图像变换域的低频和中频系数中,提高水印的鲁棒性和不可见性 实验证明该算法具有较好的抗压缩、抗噪音和抗剪切性。
-Making meaningful binary image digital watermarking algorithm based on DWT and DCT domain using
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image compression using dwt and dct
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image compression using dwt and dct doc
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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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基于离散小波变换和压缩感知理论的灰度图像压缩算法。-Grayscale image compression algorithm based on dwt and compressed sensing.
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matlab code for image compression and dwt
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Image compression is one of the prominent topics in image processing that plays a very important role in
reducing image size for real-time transmission and storage. Many of the standards recommend the use of DWT
for image compression. The compu
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matlab code for image compression using DCT and DWT
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a new hybrid transform coding methodology for
lossy image compression that integrates discrete wavelet
transform, discrete cosine Transform and singular value
decomposition methods is proposed. The proposed system has
enhancements in both the com
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图像压缩是图像处理中的一个重要课题,在减少图像尺寸以实时传输和存储方面起着非常重要的作用。许多标准推荐使用DWT进行图像压缩。DWT的计算复杂度对基于DWT的图像压缩算法的实时使用提出了重大挑战。在本文中,我们提出了一种改进的提升方案来计算近似和详细的DWT系数。修正的方程使用右移运算符和6位乘法器。计算中的层级减少到一个,从而最小化延迟和增加吞吐量。ViTEX-5 FPGA上实现的设计工作在180 MHz,功耗小于1W的功率。该设计占用了FPGA上不到1的LUT资源。所开发的体系结构适合于FP
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