Description: 在Jpeg中Huffman采用的是范式Huffman编码。经过查相关资料有两种不同说法，请高手指点。谢谢！
1、构造范式 Huffman 编码的方法大致是：
分别统计从最大编码长度 maxlength 到 1 的每个长度对应了多少个符号。根据这一信息从 maxlength 个 0 开始以递增顺序为每个符号分配编码。例如，编码长度为 5 的符号有 4 个，长度为 3 的有 1 个，长度为 2 的有 3 个，则分配的编码依次为： 00000 00001 00010 00011 001 01 10 11
问题：如果按照这种说法那么我在一付图像中渡到的数据是：编码长度为 6 的符号有 1 个，长度为 5 的有 1 个，长度为 4 的有 3 个，长度为3的个数为4个，长度为2的个数为1个。按照以上的算法得到的编码为：000000；00001；0010；0011；001；010；011；100；01。出现001是0011的前缀。在读取数据流的时候将不能区别。
2、另外一种说法，曾经发帖问过。前面的长度编码加1左移一位得到后面长度的编码。像我这个例子如何确定最短码的起始值？
谢谢大家指点具体的范式Huffman编码实现-in which Huffman is the paradigm Huffman coding. After investigations related information in two different arguments, please master guiding. Thank you! 1, tectonic paradigm Huffman coding method is generally : statistics separately from the largest maxlength length coding to a length corresponding to each of the number of symbols. According to the information from maxlength-0 progressive order of the distribution of each symbol coding. For example, the length coding for the five symbols have four, three lengths of a length of two to three. the allocation of coding followed : 00000 00001 00010 00011 001 01 10 11 questions : According to this view, if I pay in a transition to the image data is : coding length of the six are a symbol, 5 lengths of a length of 4 to 3, the length of three to fo Platform: |
Size: 8505 |
Author:gaorui |
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Description: 原生Pascal代码实现的读写JPEG文件的组件。完整源码。
This software component contains a fully object oriented Pascal implementation that allows to read and write Jpeg files. You can use this software to read and write Jpeg images from files or streams. It supports baseline and progressive Jpeg, support for metadata, as well as all conceivable lossless operations. Platform: |
Size: 270963 |
Author:jm |
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Description: < visual c++ 小波变换技术与实践> 书中所附加的网络渐进传输实例,使用ACTIVEX控件,利用了JPEG2000的原理,但有自己的改进-<Visual c++ Wavelet transform technology and practice of> the book attached to the network progressive transmission example, the use of ACTIVEX controls, use of JPEG2000 principle, but have their own improved Platform: |
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Author:郑晶晶 |
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Description: 基于J PEG2000的数字水印蒋勇(西南科技大学计算机科学与技术学院四川绵阳621010)【摘 要】：网络技术的发展为数字作品的传播提供了方便，同时也引发了对数字作品的盗版现象，如何保护数字作品的版权日益受到关注：JPEG2000作为ISO推荐的新一代静止图像压缩标准，由于其感兴趣区域编码，渐进传输等优越性能，有着广阔的应用前景。本文旨在研究保护JPEG2000图像作品版权的数字水印方案。-based digital watermarking Jiang Yong (Southwest University of Science and Technology Computer Science and Technology Institute in Sichuan Mianyang 621010) Abstract : the development of network technology for the transmission of digital works to provide a convenient, also triggered the right of pirated digital works, how to protect the copyright of digital works have been a growing concern : ISO JPEG2000 as recommended by the new generation of still image compression standard, because of its interest in regional coding, progressive transmission, and other advantages can be as broad application prospects. This paper is to study the protection of JPEG2000 images copyright of digital watermarking programs. Platform: |
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Author:ghostsx |
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Description: 在Jpeg中Huffman采用的是范式Huffman编码。经过查相关资料有两种不同说法，请高手指点。谢谢！
1、构造范式 Huffman 编码的方法大致是：
分别统计从最大编码长度 maxlength 到 1 的每个长度对应了多少个符号。根据这一信息从 maxlength 个 0 开始以递增顺序为每个符号分配编码。例如，编码长度为 5 的符号有 4 个，长度为 3 的有 1 个，长度为 2 的有 3 个，则分配的编码依次为： 00000 00001 00010 00011 001 01 10 11
问题：如果按照这种说法那么我在一付图像中渡到的数据是：编码长度为 6 的符号有 1 个，长度为 5 的有 1 个，长度为 4 的有 3 个，长度为3的个数为4个，长度为2的个数为1个。按照以上的算法得到的编码为：000000；00001；0010；0011；001；010；011；100；01。出现001是0011的前缀。在读取数据流的时候将不能区别。
2、另外一种说法，曾经发帖问过。前面的长度编码加1左移一位得到后面长度的编码。像我这个例子如何确定最短码的起始值？
谢谢大家指点具体的范式Huffman编码实现-in which Huffman is the paradigm Huffman coding. After investigations related information in two different arguments, please master guiding. Thank you! 1, tectonic paradigm Huffman coding method is generally : statistics separately from the largest maxlength length coding to a length corresponding to each of the number of symbols. According to the information from maxlength-0 progressive order of the distribution of each symbol coding. For example, the length coding for the five symbols have four, three lengths of a length of two to three. the allocation of coding followed : 00000 00001 00010 00011 001 01 10 11 questions : According to this view, if I pay in a transition to the image data is : coding length of the six are a symbol, 5 lengths of a length of 4 to 3, the length of three to fo Platform: |
Size: 8192 |
Author:gaorui |
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Description: 原生Pascal代码实现的读写JPEG文件的组件。完整源码。
This software component contains a fully object oriented Pascal implementation that allows to read and write Jpeg files. You can use this software to read and write Jpeg images from files or streams. It supports baseline and progressive Jpeg, support for metadata, as well as all conceivable lossless operations.-Original Pascal code of the components to read and write JPEG files. Integrity of the source. This software component contains a fully object oriented Pascal implementation that allows to read and write Jpeg files. You can use this software to read and write Jpeg images from files or streams. It supports baseline and progressive Jpeg, support for metadata, as well as all conceivable lossless operations. Platform: |
Size: 270336 |
Author:jm |
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Description: WALLACE是JPEG的定义者，描述了JPEG压缩方式的定义。包括了BASELINE PROGRESSIVE等。-WALLACE is the definition of JPEG, the description of the definition of JPEG compression. Includes such BASELINE PROGRESSIVE. Platform: |
Size: 102400 |
Author:lzy |
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Description: 本解码器类支持普通jpeg文件格式，这也是目前大多数jpeg文件所采用的格式，此格式主要特点是数据精度为8位，采用Huffman编码的普通DCT帧（不支持扩展串行和递进模式及数学编码）。本解码器类的IDCT算法采用三种模式，分别是浮点解码、定点整数解码和定点整数MMX优化解码，您可根据具体情况选择。-The decoder supports the general category jpeg file format, which is most used in jpeg file format is the main characteristics of data accuracy of eight, using Huffman coding common DCT frame (do not support the extension of serial and progressive mode and Mathematics encoding). This type of IDCT decoder algorithm uses three models, namely the floating-point decoding, fixed-point integer decoding and fixed-point integer MMX optimized decoder, you can choose according to specific circumstances. Platform: |
Size: 2128896 |
Author:liusheng |
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Description: The EZW encoder is based on progressive encoding to compress an image into a bit stream with increasing accuracy. This means that when more bits are added to the stream, the decoded image will contain more detail, a property similar to JPEG encoded images. It is also similar to the representation of a number like Every digit we add increases the accuracy of the number, but we can stop at any accuracy we like. Progressive encoding is also known as embedded encoding, which explains the E in EZW. -The EZW encoder is based on progressive encoding to compress an image into a bit stream with increasing accuracy. This means that when more bits are added to the stream, the decoded image will contain more detail, a property similar to JPEG encoded images. It is also similar to the representation of a number like Every digit we add increases the accuracy of the number, but we can stop at any accuracy we like. Progressive encoding is also known as embedded encoding, which explains the E in EZW. Platform: |
Size: 57344 |
Author:manikandan |
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Description: JPEG 2000 supports lossy and lossless compression of single-component and multi-component imagery.In addition to this basic compression functionality, however, numerousother features are provided, including: progressive recovery of an image by fidelity or resolution region-of-interest coding, whereby different parts of an image can be coded with differing fidelity random access to specific regions of an image.-JPEG 2000 supports lossy and lossless compression of single-component and multi-component imagery.In addition to this basic compression functionality, however, numerousother features are provided, including: progressive recovery of an image by fidelity or resolution region-of-interest coding, whereby different parts of an image can be coded with differing fidelity random access to specific regions of an image. Platform: |
Size: 3331072 |
Author:mazhar |
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Description: JPEG 2000 supports lossy and lossless compression of single-component and multi-component imagery.In addition to this basic compression functionality, however, numerousother features are provided, including: progressive recovery of an image by fidelity or resolution region-of-interest coding, whereby different parts of an image can be coded with differing fidelity random access to specific regions of an image.-JPEG 2000 supports lossy and lossless compression of single-component and multi-component imagery.In addition to this basic compression functionality, however, numerousother features are provided, including: progressive recovery of an image by fidelity or resolution region-of-interest coding, whereby different parts of an image can be coded with differing fidelity random access to specific regions of an image. Platform: |
Size: 3598336 |
Author:mazhar |
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Description: Progressive coding, another feature of the JPEG 2000 standard, means that the bit stream can be coded in such a way as to contain less-detailed information at the beginning of the stream and more detailed information as the stream progresses. This makes it ideal for Internet/network applications—especially with large images and low bandwidths—as the image can be seen instantly on the decoding side, even with low-speed networks or image databases. The lower subbands are shown first, and more detail is added as time progresses. The picture thus becomes sharper and more detailed over time, and the entire image does not have to be downloaded before it can be seen Platform: |
Size: 40960 |
Author:mazhar |
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Description: JPEG标准中规定了4种压缩模式[15]：顺序编码（Sequential encoding），渐进编码（Progressive encoding），等级编码（Hierarchical encoding），无损编码（Lossless encoding）。应用最为广泛的为基于DCT变换的顺序编码，也称之为基准模式(Baseline mode)，其它几种模式都以此为基础。这里，采用了JPEG基准模式对图像进行压缩，在基准模式中，熵编码采用哈夫曼编码方法。
-JPEG standard specifies four kinds of compression [15]: the order of encoding (Sequential encoding), progressive encoding (Progressive encoding), class code (Hierarchical encoding), lossless encoding (Lossless encoding). The most widely used sequence-based DCT transform coding, also known as baseline model (Baseline mode), several other models are based. Here, using the JPEG image compression benchmark model, in the baseline model, the entropy coding using Huffman coding.
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Size: 1024 |
Author:yxl |
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Description: JPEG是一个压缩标准，又可分为标准 JPEG、渐进式JPEG及JPEG2000三种:-JPEG is a compression standard, can be divided into standard JPEG, progressive JPEG and JPEG2000 in three ways: Platform: |
Size: 13312 |
Author:ldp |
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Search - progressive JPEG