海康相机20秒闪烁
If you’ve taken a photo with a digital camera, you might have seen areas of the photo flash black—like they do in the GIF below—when you review your images.
如果您使用数码相机拍摄了照片，则在查看图像时，可能会看到照片的某些区域呈黑色闪烁(就像下面的GIF中一样)。
This black flashing is colloquially referred to as the “blinkies.” The areas that flash black show where the highlights have been clipped or blown; in other words, the parts of your image that are overexposed and have been recorded by the camera as pure white.
这种黑色闪烁俗称“眨眼”。 黑色闪烁的区域表示高光被剪切或吹断的地方； 换句话说，图像中曝光过度并被照相机记录为纯白色的部分。
Here’s a proper look at that image above. You can see that the sky is a bright white.
正确看一下上面的图片。 您可以看到天空是明亮的白色。
Even though the original image is a RAW file, there’s not much I can do to save it.
即使原始图像是RAW文件，也无法做很多事情来保存它。
So, if you see the blinkies, it means something is off with your exposure.
因此，如果您看到眨眼，则表示您的曝光有些问题。
如何使用眨眼来拍摄更好的照片 (How to Use the Blinkies to Take Better Photos)
The blinkies don’t always show by default, so if you want to use them, you might need to turn them on in the menu. On Canon cameras, it’s Playback > Highlight Alert. On Nikon cameras, you press Up during photo playback to go into the Highlights view mode. If you’re not sure, consult your camera’s manual and look for something like “Highlight Warning.”
默认情况下，眨眼并不总是显示，因此，如果要使用它们，则可能需要在菜单中将其打开。 在佳能相机上，它是“播放”>“突出显示警报”。 在尼康相机上，在照片播放过程中按向上按钮可进入“高光”视图模式。 如果不确定，请查阅相机的手册并查找诸如“高光警告”之类的内容。
Along with the histogram, the blinkies are a useful tool you can use to make sure you get the correct exposure in camera, especially if you’re using a technique like Exposing to the Right, which deliberately overexposes the image to capture more data.
与直方图一起，眨眼是一个有用的工具，可用于确保在相机中获得正确的曝光，尤其是在使用像“向右曝光”之类的技术时，该技术故意使图像曝光过度以捕获更多数据。
With the blinkies turned on, you can quickly see whether an image is overexposed or not. That way, you can take steps to correct the problems while you’re still on location.
启用眨眼功能后，您可以快速查看图像是否曝光过度。 这样，您可以在仍在位置时采取步骤纠正问题。
How you fix the overexposure depends on your goal.
如何解决过度曝光取决于您的目标。
If you’re using an ISO higher than 100, then your first step should be to reduce it. Reducing the ISO reduces the amount of digital noise in your image but otherwise doesn’t affect how it looks.
如果您使用的ISO高于100 ，那么您的第一步应该是降低它。 降低ISO可以减少图像中的数字噪点数量，但不会影响其外观。
Next, you need to decide whether shutter speed or aperture means more to you. If you want to keep a slow shutter speed for the long exposure look, then you can go with a narrower aperture. On the other hand, if you want the shallow depth of field that comes with a wide aperture, then you should use a faster shutter speed.
接下来，您需要确定快门速度还是光圈对您来说意义更大。 如果您想保持较低的快门速度以获得更长的曝光效果，则可以使用较窄的光圈。 另一方面，如果您想要较宽的光圈带来较浅的景深，则应使用更快的快门速度。
If you don’t want to change either the shutter speed or aperture, you can also use a neutral density filter to reduce the amount of light getting to the sensor.
如果您既不想改变快门速度或光圈，也可以使用中性密度滤光片减少进入传感器的光量。
Here’s the same image as above with the ISO stopped down to 100.
这是与上面相同的图像，ISO停止为100。
Much better!
好多了！
It’s important to note that the blinkies aren’t infallible. They’re based on the data in a JPEG preview of the RAW image, so there’s almost always a little bit of data that you can pull back. Also, sometimes it’s impossible to stop your camera from blowing out some highlights, like the center of the sun; this is normal. You only need to care about the blinkies when a large or important area of your image is showing them.
重要的是要注意，眨眼并不是万无一失的。 它们基于RAW图像的JPEG预览中的数据，因此几乎总有一些数据可以拉回。 另外，有时候也无法阻止相机吹出某些高光，例如太阳的中心。 这个是正常的。 仅当图像的较大区域或重要区域显示闪烁时，才需要关心它们。
翻译自: https://www.howtogeek.com/369323/why-does-the-photo-on-my-camera-flash-black/
海康相机20秒闪烁