Question 1. In Figure 1 are two histograms labeled A and B.
Assume the two photographs that produced these histograms are of a general
landscape scene. After taking each photograph, the photographer stayed in
the area and lounged around. In which location, A or B, do you think the
photographer would most likely wear sunglasses while relaxing outside?
- 1B is the correct answer. In histogram 1A, the pixels
are clustered to the left. Since the left part of a histogram
represents dark tones, then it is likely that the photograph is of a
dark or dimly lit landscape. In histogram 1B, the pixels are
clustered to the right. Since the right part of a histogram
represents light tones, then it is likely that the photograph is of
a well lit or bright landscape.
Question 2. In Figure 2 are two histograms labeled A and B.
One is of a color RGB image. The other is of a black and white RGB image.
State which histogram is of which image.
- Histogram A is of the black and white RGB image. When an RGB
image is converted to black and white, each pixel's individual
channel values are recalculated to be the same. This is how the
color is removed from an image. When the individual channel values
are different, as in 2B, we have color.