对比强弱

对于合成孔径雷达这种侧视遥感器图像，SAR图像中道路与周围背景对比度强弱与雷达的侧视方向及道路的延伸方向密切相关，针对这一问题，提出了一种多阈值局部检测算子。

The contrast of road in SAR images with the background is tightly related with the side-looking direction of radar and the extension direction of roads . Aiming at this problem , a multi-threshold detector is presented .

利用目标区域平均灰度作为判决条件，使得目标轮廓更为完整；选取同态最优阈值时是自适应的，根据图像对比度强弱，运用图像灰度值均方差求得阈值。

The average gray level of target region and homomorphic optimal threshold are taken as the decision criterion of region growing to get the original tumor region .

在力度方面，作品整体的强弱对比与局部的强弱迅速转换，给作品带来了强烈的冲突感。

Strength on the work force compared with the overall strength of the local work quickly converted to bring a strong sense of conflict .

这三类对比焦点在对比功能的强弱方面有一定的差异，这些差异与认知上的距离象似性原则有密切的关系。

In contrast with the three focus areas of the strengths and weaknesses of a certain functional differences , these differences and understanding the " principle of distance as iconicity " close relationship .