Many people equate focal ratios with image brightness, but strictly speaking this is only true when taking pictures of "extended" objects like the Moon and nebulae.
许多人常常把焦比和图像亮度等同。其实严格来说，只有当观察月亮和星云等“扩展”光源(译者注：与点光源相对，可以理解为面光源)的时候，上述说法才是正确的。
In this way, image brightness will be taken into account and the image edge should be simultaneously maintained as possible during filtering image noise.
这样，滤波时就可以考虑到图像的亮度信息，在滤除图像噪声的同时尽量保持了图像的边缘。
Since bilateral filtering method can make the weight coefficient of filter vary with image brightness, so the adaptive filtering effect can be attained during the filtering process.
由于双边滤波的方法可以使滤波器的权系数随着图像的亮度变化而改变，所以在滤波过程中能达到自适应滤波的目的。
The results show that the algorithm can correct the adjacent camera image brightness and color difference effectively, and makes a good improvement for image mosaic at later period.
实验结果证明，该算法能有效校正相邻摄像机图像的亮度和色差，对后期的拼接融合处理起到了很好的改善效果。
But besides noises, there are some other interference factors which weaken the vision effect of digital image greatly, like image contrast, image brightness and image sharpness, etc.
但是通常影响数字图像的视觉效果，除了噪声以外，还存在其它的因素，如图像对比度、图像亮度、图像清晰度等等。
The present invention reduces the number of scanned lines to shorten the addressing time, and increase the holding time, so as to raise image brightness of color plasma display screen.
本发明通过减少扫描行数目，缩短寻址时间，增加维持时间，从而提高了彩色等离子显示屏图像的亮度。
The present invention reduces the number of scanned lines to shorten the addressing time, and increase the holding time, so as to raise image brightness of color plasma display screen.
本发明通过减少扫描行数目，缩短寻址时间，增加维持时间，从而提高了彩色等离子显示屏图像的亮度。
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