Game Development Reference
Figure 6.62 The histogram in the
Levels effect tells us about the
luminance values in our footage.
a histogram, which gives us a readout of the luminance values in
our image (Fig. 6.62).
Obviously, we'll talk much more about this when we cover the
Levels effect, coming up later in this chapter. For now, just know
that the left side of this chart shows us shadows and the right side
shows us the highlights. The height of the graph indicates the
amount of that particular luminance value. This histogram is tell-
ing us that there are no highlights, but there are loads of middle
range values, and a little bit of the darkest shadow areas.
Now, delete the Levels effect and instead apply the Equalize
effect. You can instantly see a signifi cant difference in the tonal
balance (Fig. 6.63).
The results look much better as the luminance values are
redistributed, or equalized, across the entire spectrum. But, in
all fairness, you should be aware that the Equalize effect does not
always bring about the instant improvement it did here. What we
really wanted to do was to create more tonal balance. If you apply
another instance of the Levels effect after Equalize (below it in
the Effect Controls panel), you'll see that the luminance values
are now more balanced, and there is a little bit of each brightness
value (Fig. 6.64).
There are only two options here—the Equalize drop down and
the Amount to Equalize value. Amount to Equalize is overall like