Description: bmeps converts bitmap images (PNG/JPEG/NetPBM) to EPS and PDF. EPS level 1, 2 or 3 can be created using run-length compression, flate compression and ASCII-85-encoding. PNG alpha channels can be transferred to PDF or converted to EPS/PDF image masks. Platform: |
Size: 4809609 |
Author:马振强 |
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Description: 本程序提供游程长度压缩和解压缩函数,并对图象文件压缩和解压缩-procedures for the run-length compression and decompression functions, as well as image compression and decompression Platform: |
Size: 13075 |
Author:徐亮 |
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Description: VC读取BMP图,以及经典的边缘检测算法,还包括游程编码,本程序实现了检测、提取、压缩bmp图的边缘图像。-VC read BMP map, and the classic edge detection algorithms, including run-length coding, the program of detection, extraction, compression bmp image map to the brink. Platform: |
Size: 52224 |
Author:罗永 |
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Description: 本程序提供游程长度压缩和解压缩函数,并对图象文件压缩和解压缩-procedures for the run-length compression and decompression functions, as well as image compression and decompression Platform: |
Size: 13312 |
Author:徐亮 |
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Description: 数据压缩游程编码示例,模拟游程编码过程,可以做课程设计使用.-data compression run-length coding examples and simulation run-length coding process can be done using the curriculum design. Platform: |
Size: 1024 |
Author:陈玲玲 |
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Description: A simple (de)compression program using Run Length Encoding.
Compression is done that easy:
compressedData = rle(originalData)
Decompression:
originalData = rle(compressedData) -A simple (de) compression program using Run Length Encoding.Compression is done that easy: compressedData = rle (originalData) Decompression: originalData = rle (compressedData) Platform: |
Size: 1024 |
Author:阳关 |
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Description: 摘 要
文章以空间监控系统为背景,深入研究了JPEG图像压缩标准的实现方法,并基于FPGA对其进行了实现和优化。文中给出了详细的实现方法和优化过程,测试表明达到了很好的效果。
简单介绍了有损静态图像压缩当前有两种比较流行的标准JPEG和JPEG2000。说明了用JPEG方法压缩的原因。
介绍JPEG基本原理:JPEG对灰度图像的压缩处理过程主要包括:图像分割,离散余弦变换(DCT),量化(Quantization),“Z”形排序(Zigzag Scan),差分脉冲编码调制(Differential Pulse Code Modulation,DPCM)对直流系数(DC),行程长度编码(Run-Length Encoding,RLE)对交流系数(AC),霍夫曼(Huffman)编码等。
JPEG标准的特点是离散余弦变换。
比较详细介绍压缩系统的构成和实现。实现提及步骤, JPEG压缩模块设计和编码模块实现细节。
-Abstract
Article in the space monitoring system for the background, in-depth study of the JPEG image compression standard implementation methods and carried out based on FPGA implementation and optimization. In this paper, a detailed method of implementation and optimization of the process, testing showed that to achieve good results.
Easy introduction of harmful static image compression has two kinds of comparisons that the current popular standard JPEG and JPEG2000. Illustrated by the reasons for JPEG compression method.
JPEG introduce the basic principles: JPEG compression of gray-scale image processing include: image segmentation, discrete cosine transform (DCT), quantization (Quantization), "Z"-shaped sort (Zigzag Scan), differential pulse code modulation (Differential Pulse Code Modulation, DPCM) on the DC coefficient (DC), Run Length Encoding (Run-Length Encoding, RLE) of the exchange coefficient (AC), Hoffman (Huffman) coding.
JPEG standard is characterized by discrete Platform: |
Size: 523264 |
Author:压子 |
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