基本上是特殊的摄影镜头在曝光时对影像横向地压缩。
Basically, special camera lenses squeeze the image horizontally at the time of exposure.
曝光时使用不同滤色镜即可获得影像反差不同的照片。
By exposing under different light filters, photographs with different image contrast can be obtained.
一旦你找到了最佳曝光组合，你就可以通过调整来得到最佳的景深以及影像固化。
Once you find the right exposure, you can adjust the Settings to get the right amount of depth of field and motion in the image.
本发明公开了一种曝光影像偏差的校正方法和成像装置。
The invention discloses a method for calibrating the bias of an exposure image and an imaging device.
在第一组曝光时，为了使天空中的星星保持在相同的位置，影像是稍微旋转过的。
In the first set of exposures, sky images were co-added with slight rotations to keep the stars in one place.
这是因为上面这张照片是同一台相机的连续曝光经过数位合成的影像。
The reason for this is because the above image is actually a digital composite of time-consecutive exposures from the same camera.
为了获得有充分对比的影像，元件需要在短时间内有充足的光线进行曝光。
To obtain an image with enough contrast, the sensor needs to be exposed to a sufficient amount of light during a short amount of time.
在这个天区的精彩长时曝光影像里，还可以看见更遥远的昏暗背景星系。
This impressively deep exposure of the region also reveals faint and even more distant background galaxies.
在这个天区的精彩长时曝光影像里，还可以看见更遥远的昏暗背景星系。
This impressively deep exposure of the region also reveals faint and even more distant background galaxies.
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