早期胶卷相机使用者对夜间摄影避而远之，原因在于，或者是合适景深所需的长时间曝光无法达到，或者是产生太多噪点。
Early film photographers shied away from capturing night scenes because these require prohibitively long exposures to maintain adequate depth of field, or produced unacceptable amounts of image noise.
而且， 基于量子点的光电探测器产生的图像噪点更少， 因此即便像素没有提高， 产生的图像也会比以前锐利。
Moreover, photodetectors based on quantum dots produce less noisy images, so the picture is sharper even if the number of pixels is not increased.
它的物理属性(物理术语称作光谱很窄)意味着即便没有光照射到它上面，它有时也会发射电子，这样就产生了图像噪点。
Its physical properties (its narrow bandgap, in physics parlance) mean that it sometimes releases electrons even though no light has fallen on it, resulting in a noisy image.
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