From the course: Processing Large Scale Black-and-White Photographs with Aperture

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Level balancing

Level balancing

The next step is to ensure that the image is properly exposure adjusted, meaning that if we look at the histogram here, that we have a full range histogram; that we are not losing detail in the blacks, or in the whites, and again, that we have full data range, at least where it is appropriate. So, if should have highlights, we want to make sure that our histogram is reaching into the highlights, and the same thing with the shadows. For this particular shot, it's, first of all, clearly underexposed. It's quite a bit dark, and if you look at the histogram you will see that the shadows are being crunched up over here, and we will take a look in just a moment exactly what part of the image is this. We can also see by looking at the right side of the histogram, while there are clearly no blown out details, there is nothing in the top, say, third or quarter of the histogram here. This mean there is absolutely no data. Now, if this was a bright sunny day, that would be a real problem; this…

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