In the fieldwork of industry , many disadvantages , such as abominable environment , unbalancing illumination , displacement of carried products , etc . . will cause that the obtained images are fuzzy , noisy or will bring characters into scaling , shift and rotation 由于工业现场环境恶劣，光照不均，传送过程中产品可能发生移动，诸多不利因素会引起所拍摄的图像失真、模糊、含噪以及使字符产生缩放、平移和旋转的情况。
The study of this paper indicates that , the combined binarization method can keep details well and tolerate the abominable state ; the method to estimate skew angle based on radon transformation is very exact , and the distortion of corrected image is also very little ; the vlp location method based on wavelet analysis and intensity moment has a high location exactness and a soon processing time ; and intelligent character recognition machine can accomplish the function of self - adaption , self - correction , self - study , etc 本文研究表明：混合二值化方法能较好的保留图像细节，抗噪声能力强；基于radon变换估计倾斜角度的方法检测角度精确，校正后图像失真较小；基于小波分析和亮度矩的车牌定位方法定位准确率高，速度快；仿人智能字符识别器则能实现识别字符过程中的自适应、自校正、自学习功能等。
The paper brings forward the idea of panoramic video surveillance system . using multi cameras monitoring simultaneously , through deep research on image distortion calibration and image stitching , successfully realizes the panoramic images , and finishes the panoramic video surveillance system ' s initial construction 本文提出了全方位视频监视系统的新构想，用多个摄像头同时进行监视，通过对图像失真校正和图像拼接的深入研究，成功地实现了全景拼图，完成了全方位视频监视系统的初步构建。
The design scheme with a multi - state trellis states also shows a better snr performance than current reported schemes . the author , in the meanwhile , uses tcq to implement sar image compressions . the result proves that the compressed images are high psnr and low distortion characters , which is suitable to be used in space - borne and airborne sar systems 论文还采用tcq算法对sar图像进行了压缩试验，结果表明，经过tcq算法压缩后的图像具有较高的信噪比，而且图像失真小，可以作为今后星载、机载sar平台进行数据压缩的一种可选择的技术方案。
First , resistance to geometrical distortion was obtained by using moment normalization ; second , we focus on the phase of fourier - mellin transform . before detecting watermark , synchronization could be retrieved by using the phase information . to eliminate the influence of pixel value distortion generated during print / scan process , a dft - based robust watermark algorithm was designed , which could successfully detect watermark from a severe distorted image 另一种思路是根据图像经过旋转、缩放、平移后，其傅立叶?梅林变换域只有相位受到影响的特点，从其相位中提取几何失真信息，然后再进行相应的失真补偿，从而消除几何失真的影响；对于打印扫描过程产生的像素值失真，本文也提出了一种基于dft的鲁棒性算法，能在较严重的图像失真情况下，成功检测水印。
Wavelets are becoming a key technique in the ongoing source compression standard jpeg - 2000 . the positive arguments for advocating dwt in image watermarking are : preventing watermark removal by jpeg - 2000 lossy compression , reusing previous studies on source coding regarding the visibility of image degradations , and offering the possibility of embedding in the compressed domain 在小波域嵌入水印的原因是：可以防止由于jpeg - 2000有损压缩而造成的水印消除；可以利用信源编码领域对图像失真的可见性研究成果控制水印的嵌入位置和强度；可以实现在压缩域直接嵌入水印。
