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11. Now, decrease the brightness by moving the slider to the left, until the left-most
edge of the histogram curve is at the left edge of the Grayscale Histogram Display.
Notice that the entire Grayscale Histogram has moved leftward and there is a gap
between the right edge of the histogram and the right edge of the Grayscale
Histogram Display.
Figure 4.9 - Shifting the Grayscale Histogram to the Left by Decreasing Brightness
12. Now, increase the Gain slider, by moving it to the right, until the right edge of the
Grayscale Histogram is at the right edge of the Grayscale Histogram Display. Notice
that the Grayscale Histogram now contains “jagged bumps”.
Figure 4.10 - Spreading the Grayscale Histogram by Increasing Gain
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