查询词典 compression

All three are JPEG files - a low-compression mode, a medium-compression mode and a high-compression mode.

三种模式分别为：低分辨率模式、中分辨率模式、高分辨率模式，最佳模式的图片尺寸是基本模式的4倍。

A high-compression JPEG file is much smaller than a low- compression JPEG file, but more information is lost from the original image, and more artifacts from the file compression can be seen in the photo.

相机压缩率是由相机生产商决定的，高压缩率的JPEG文件比低压缩率的JPEG文件，尺寸要小，但去除的原始信息更多，照片质量更差。

The lossless deflate compression algorithm is based on two other compression algorithms: huffman encoding and LZ77 compression.

无损压缩算法是基於两个其他压缩算法：哈夫曼编码和LZ77压缩。

Text compression is a branch of data compression are lossless compression.

文本压缩是数据压缩的一个分支，属于无损压缩。

The main contributions include:(1) Energy conservation law of Haar wavelets transform is proved to compress data streams.(2) The relation between the coincidence measure and trend of streams is revealed as along with the invariability under parallel shift and the equivalence law over coincidence measure to approximately express data-streams by the wavelet coefficient of the characteristic stream and its energy.(3) Multi-Scales energy decomposition model is proposed to improve the compression precision.(4) The multi-scales compression algorithm and the energy conservation reconstruction algorithm are designed.(5) Extended experiments show that the compression ratio of the new methods is 2~4 times as the traditional method.

主要研究成果包括：(1)证明了Haar小波变换服从能量守恒规律，并用于压缩数据流；(2)揭示了数据流的偶合度与变化趋势的相关性、偶合度的平移不变性及等价规律，采用特征流序列的小波系数和流能量近似表示流的趋势，达到压缩的目的；(3)提出了多尺度能量分解模型，提高了表示精度；(4)设计了多尺度能量分解压缩算法以及多尺度重构算法；(5)在真实数据集上的实验表明，新方法的压缩比是传统小波方法的2～4倍。

The study establishes the compression of models and algorithms for vector graphics data on different basis, including on the basis of vector graphic factors of B spline curves in predecessors research; on the basis of rectangle graphic factors in main axis mode; on the basis of the application of Hough transform to polygonal line, ellipse and circle, so the study improves the models and algorithms of compression for vector graphic data.The compression for vector graphic data mainly studies the data of storing graphic factors.

本文研究的内容是：根据对以往各种曲线矢量数据压缩模型与算法的研究，建立了基于B样条的曲线矢量图形要素的数据压缩模型和算法；在前人研究的基础上，建立基于主轴模式的矩形图形要素的数据压缩模型和算法；本文作者将Hough变换应用到折线、圆及椭圆图形要素的矢量数据压缩上，在此基础上改进了基于Hough变换的折线、圆及椭圆图形要素的数据压缩模型和算法。

Experimental reault shows that, the compression algorithm has a primely compression performace compared with other compression algorithms present recently.

实验表明，与目前研究的其它超光谱图像压缩算法相比，该算法有着很好的压缩性能。

Vector Quantization is an efficient lossy compression technique, whose prominent virtues are high compression ratio and simple decoding process, so it has become one of important compression techniques for image coding.

矢量量化是一种有效的有损压缩技术，其突出优点是压缩比大且解码算法简单，因此已成为图象压缩编码的重要技术之一。

Rle compression algorithm procedures, said a simple RLE compression is the same as a string of continuous data into a specific format to achieve the purpose of compression.

详细说明： rle压缩算法程序，简单的说RLE压缩就是将一串连续的相同数据转化为特定的格式达到压缩的目的。

In addition, the new compression method is simple, and the memory requirement in the operation process is lower, and it is fit for parallel optimizing progress. The compression speed can be advanced by using DSP, and it also can be implement image real time compression with little information loses.

另外，该压缩方法运算过程中所需存储量小和算法简单的特点，适宜硬件实现，而且便于并行处理，如果用数字信号处理器实现压缩算法，可进一步提高压缩速度，实现用于图像数据在高保真情况下的实时压缩。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。