It is difficult to carry out edge detection of dim images by general algorithms.

由于弱光照图像的成像特点，使得普通的边缘检测的算法难以奏效。

youdao

The theory is that if you were to read in dim light for a few years, the eye will tend to grow slightly larger to make the peripheral images on the retina clearer.

因此，依据这个理论，如果持续几年在昏暗的灯光下读书，那么眼球就会略微增大，为使视网膜上的成像更清晰。

youdao

In terms of the low SNR and contrast, the small and dim targets can not be easily detected in a single IR image, so utilizing a sequence of images is an effective method.

红外图像中的弱小目标因为信噪比和对比度较低，用单帧图像检测很难得到满意的效果，利用多帧图像信息进行检测是有效的手段之一。

youdao

As a result of the improvement, dim and double images are cut off by eliminating the air gap layer between the front glass and Plasma panel.

ENGADGET: Sixteen new plasma TVs from Panasonic for 2013, none that break into larger classes

Images are bright and colorful despite dim and gloomy lighting, and while we can't say for sure whether that's thanks to the larger sensor or the integrated TrueColor tech, we can say the difference is noticeable compared to the competition.

ENGADGET: Microsoft's 1080p LifeCam Studio review