If you want your web page to be displayed correctly in all resolutions , create your web pages with tables and use percentages to define your table widths instead of actual pixel values 如果希望网页在所有分辨率状态下，呈现出精美的外观，你就需要利用表格，并且你需要利用百分比定义表格宽度，而不能利用实际的像素值。
To solve the first problem , frame difference information is used to direct the location of object regions of difference image frame , and then the objects location information come from d i f ference frame i s used to compound a background frame that does not include any moving object 对背景建模问题，文中提出了根据帧差信息指导不同图像帧中的目标物区域位置定位，据此用不同帧目标物区域像素值合成“空”背景的方法。
Conclusion r1 represent pixel - value of original image range block , r represent mean - value of original image range block , d represent mean - value of original image domain block , d1 represent pixel - value of resumptive image domain block , d represent mean - value of resumptive image domain block . superior perfermance of resumptive image range block is obtained as compared to conventional creative function by one iteration , that is , ) ， d _ i ( i = 1 ， 2 ， … ， n )分别为某一恢复图像定义域块的均值和每一像素的像素值，我们用传统的和改进的生成函数分别进行一次迭代，则用改进的生成函数进行迭代的恢复图像每一值域块的效果较好，即：
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。
