Welcome！[Sign In] ！[Sign Up]！
Front-page it | Collect it | [中国-简体中文]
FAQ Fav
Location:
Search - JPEG IDCT

Search list

[Compress-Decompress algrithms] jpeg

Description: the attached utility is a work I ve submitted to the university It shows what a jpeg compression is all about. the function implements the DCT transform, using a matrix operator. note that matlab has a function for the DCT and iDCT transforms that might be more efficient.
Platform: | Size: 115084 | Author: 风帆 | Hits:

[Special Effects] jpeg

Description: 论文主要介绍了JPEG的编码和解码过程。该程序的编码部分能把一张BMP格式的图象进行JEPG编码，压缩成以二进制形式保存的文件；通过相应的解码程序又可以把图象解压缩出来。在图象传送过程中，我们经常采用JPEG格式对静态图象进行编码。JPEG基本系统是一种有损编码，无法完全恢复出原图象，信息有一定的丢失，称为有损压缩。尽管我们希望能够无损压缩，但是通常有损压缩的压缩比(即原图象占的字节数与压缩后图象占的字节数之比，压缩比越大，说明压缩效率越高)比无损压缩的高。JPEG编码先把图象色彩RBG变成亮度Y和色度Cr、Cb，它利用人的视觉对色度不敏感的特点，减少一部分色度数据，以达到压缩。 JPEG采取多种编码方式，包含有行程编码(Run Length Coding)和哈夫曼(Huffman)编码，有很高的压缩比。在编码前，先对数据进行分块，离散余弦变换（DCT）及量化，保留能量大的低频信号，丢弃高频信号以达到压缩。解码时，进行熵解码，反量化，反离散余弦变换（IDCT）。
Platform: | Size: 1959811 | Author: 李明 | Hits:

[Special Effects] Jpeg-Compression

Description: 附件里的文件是我已经提交给学校的一个工作。它演示了一个JPEG图像压缩算法的全部。使用一个矩阵操作实现DCT变换（提示MATLAB有一个自己的DCT和iDCT函数，可能它的会更高效），附件里的ReadMe.txt包含了详细的算法Restoration
Platform: | Size: 87822 | Author: 李远 | Hits:

[Graph program] dctidct

Description: 用于ti c55x dsp的静止图像jpeg算法中的正向余弦变幻的实现 -ti c55x DSP for the static image jpeg algorithm forward to achieve changes in the cosine
Platform: | Size: 5120 | Author: 陈大山 | Hits:

[Compress-Decompress algrithms] DCT2D

Description: IDCT JPEG中用到的 大家可以参考 呵呵 很好用-IDCT JPEG we can use the reference Oh good use
Platform: | Size: 1024 | Author: | Hits:

[Compress-Decompress algrithms] j2b

Description: JPEG图像解码并转换成BMP图像：大概包括IDCT、反量化、反编码等过程，程序可以正确编译！-JPEG image decoding and converted into BMP images : probably includes IDCT, anti-quantified, Anti-coding processes, procedures can correct translation!
Platform: | Size: 8192 | Author: duyingsen | Hits:

[Software Engineering] fpgaJPEGdcode

Description: 基于fpga的JPEG编解码器设计，采用流水线优化解决时间并行性问题，提高DCT/IDCT模块的运行速度。-based fpga JPEG codec design, the flow of time to solve optimization problems in parallel, enhance DCT/IDCT module of the operating speed.
Platform: | Size: 6895616 | Author: Janke | Hits:

[Compress-Decompress algrithms] jpeg

Description: the attached utility is a work I ve submitted to the university It shows what a jpeg compression is all about. the function implements the DCT transform, using a matrix operator. note that matlab has a function for the DCT and iDCT transforms that might be more efficient.-the attached utility is a work I ve submitted to the universityIt shows what a jpeg compression is all about.the function implements the DCT transform, using a matrix operator.note that matlab has a function for the DCT and iDCT transforms that might be more efficient .
Platform: | Size: 114688 | Author: 风帆 | Hits:

[Special Effects] jpeg_bmp

Description: 从JPEG转bmp格式，huffman采用存储译码，IDCT变换采用行列分别译码，采用loeffler译码，算法和数据结构都很优秀-Bmp to switch from JPEG format, huffman decoding using storage, IDCT transform decoding using the ranks, respectively, using loeffler decoding, algorithms and data structures are very good
Platform: | Size: 9216 | Author: 杜伟 | Hits:

[VC/MFC] 8_8_DCT_IDCTgaoxiaojiegou

Description: 一种用于8*8DCT变换的高效结构,做DCT或JPEG变换时可做参考-A 8* 8DCT transform efficient structure, make DCT or JPEG transform can reference when
Platform: | Size: 55296 | Author: wangwei | Hits:

[Special Effects] jpeg

Description: 论文主要介绍了JPEG的编码和解码过程。该程序的编码部分能把一张BMP格式的图象进行JEPG编码，压缩成以二进制形式保存的文件；通过相应的解码程序又可以把图象解压缩出来。在图象传送过程中，我们经常采用JPEG格式对静态图象进行编码。JPEG基本系统是一种有损编码，无法完全恢复出原图象，信息有一定的丢失，称为有损压缩。尽管我们希望能够无损压缩，但是通常有损压缩的压缩比(即原图象占的字节数与压缩后图象占的字节数之比，压缩比越大，说明压缩效率越高)比无损压缩的高。JPEG编码先把图象色彩RBG变成亮度Y和色度Cr、Cb，它利用人的视觉对色度不敏感的特点，减少一部分色度数据，以达到压缩。 JPEG采取多种编码方式，包含有行程编码(Run Length Coding)和哈夫曼(Huffman)编码，有很高的压缩比。在编码前，先对数据进行分块，离散余弦变换（DCT）及量化，保留能量大的低频信号，丢弃高频信号以达到压缩。解码时，进行熵解码，反量化，反离散余弦变换（IDCT）。
Platform: | Size: 1959936 | Author: 李明 | Hits:

[Picture Viewer] jpeg_decode

Description: jpeg解码器源代码 cjpeg.cpp 解码器类原程序 idct.cpp 解码器类原程序,idct解码函数 cjpeg.h 解码器类头文件 showjpeg.cpp 例子程序原文件 showjpeg.exe 使用本原代码的例子程序 -jpeg decoder source code types of the original decoder cjpeg.cpp procedures decoder category idct.cpp original procedure, idct decoding function of decoder cjpeg.h category header file example showjpeg.cpp procedures using the original document showjpeg.exe primitive example of the procedure code
Platform: | Size: 50176 | Author: zhu | Hits:

[VHDL-FPGA-Verilog] DCT_IDCT

Description: 离散余弦变换及反离散余弦变换的HDL代码及测试文件。包括VHDL及Verilog版本。可用途JPEG及MEPG压缩算法。-Discrete cosine transform and inverse discrete cosine transform of the HDL code and test files. Including VHDL and Verilog versions. And MEPG can use JPEG compression algorithm.
Platform: | Size: 29696 | Author: caesar | Hits:

[Special Effects] Jpeg-Compression

Description: 附件里的文件是我已经提交给学校的一个工作。它演示了一个JPEG图像压缩算法的全部。使用一个矩阵操作实现DCT变换（提示MATLAB有一个自己的DCT和iDCT函数，可能它的会更高效），附件里的ReadMe.txt包含了详细的算法Restoration-赂 陆 录 镁脌茂渭脛脦脛 录 镁脢脟脦脪脪脩 戮 脤谩 陆 禄赂 酶脩 搂 脨 拢 渭脛脪禄 赂 枚 鹿陇脳梅隆 拢 脣眉脩脻脢 戮 脕脣脪 禄赂 枚JPEG脥 录 脧帽脩 鹿 脣玫脣茫 篓 渭脛脠芦 虏 驴 隆 拢 脢 鹿 脫脙脪 禄赂 枚 戮 脴脮贸 虏 脵 脳 梅 脢渭脧脰DCT 卤 盲禄 禄拢 篓 脤谩脢 戮 MATLAB脫脨脪禄 赂 枚 脳 脭 录 潞 渭脛DCT 潞 脥iDCT 潞 炉 脢媒 拢 卢 驴 脡脛脺脣眉渭脛 禄谩 赂 眉 赂 脽脨 搂拢漏拢卢赂陆录 镁脌茂渭脛ReadMe.txt 掳 眉 潞 卢 脕脣脧锚脧 赂 渭脛脣茫 篓 Restoration
Platform: | Size: 88064 | Author: 李远 | Hits:

[Graph program] jpgdecode

Description: JPEG图片编解码程序，包括读头文件和DCT，IDCT变换等等。-JPEG image codec procedures, including the first reading of documents and DCT, IDCT transform and so on.
Platform: | Size: 387072 | Author: 张朝 | Hits:

[Streaming Mpeg4] dct

Description: 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)
Platform: | Size: 6144 | Author: 周辉 | Hits:

[Compress-Decompress algrithms] jpeg_decode

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。-jpeg decoder using Huffman encoder、IDCT based on foating decoder、Fixed-point integer decoder and Fixed-point integer MMX Optimized decoder，you can make your choice According to the specific circumstances。
Platform: | Size: 103424 | Author: 倾泠月 | Hits:

[Special Effects] JPEG

Description: JPEG编码硬件加速器，采用DCT算法，其中含有skew circular convolution单元，其构架设计能以精简的电路，同时满足DCT与IDCT的需求。-Accelerator hardware JPEG encoder, the DCT algorithm, which contains skew circular convolution module, the framework in order to streamline the design of the circuit, at the same time meet the needs of DCT and IDCT.
Platform: | Size: 39936 | Author: Antonio | Hits:

[matlab] jpeg

Description: jpeg compression , use DCT, Zigzag, Quantization,IDCT, InvZigzag, huffman to do the compression with matlab
Platform: | Size: 5120 | Author: phoenix | Hits:

[Compress-Decompress algrithms] Jpeg

Description: 视音频课程作业，对视频抽帧，对单张图片进行yuv420采样、DCT变化、量化以及反量化、IDCT变化(Jpeg Encoding & Decoding)
Platform: | Size: 41624576 | Author: yu_x | Hits:
« 12 »

CodeBus www.codebus.net