Exercise 3: Histograms

Exercise 3: Histograms

I have taken three images of our garden hut which I hope demonstrates histograms.  Each part of the hut was identified as being low-contrast, medium -contrast or high-contrast.

The image was processed and the histogram superimposed as shown below.

High-contrast

You can see in the above high-contrast image that the values cover across the histogram.

Medium-contrast

Here you can see, on the medium-contrast image, that the values are squashed into the middle half of the histogram.

Low-contrast

Here you can see, on the low-contrast image, that the values are squashed into the middle of the histogram.

The effect of exposure values can be seen in the following three images.

You can see as when the image is under exposed (exposure -1.0) the values move to the left side of the histogram.  When over exposed (exposure +1.0) they move to the right.

I found that that area of the seat nearest the camera and the garden fence at the rear of the image, showed highlight clipping whereas there was little shadow clipping.