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CyberLink PhotoDirector
26
Histogram
The histogram is a graphical representation of the color tone distribution in a
selected photo. Below the histogram is some metadata information for the photo.
The X axis of the graph represents the RGB color tone value between 0 and 255,
while the Y axis indicates the number of pixels in the photo that have this value.
The histogram is created with the three RGB (red, green, and blue) color values
given to each pixel in a photo. The gray portions indicate where all three colors
overlap on the histogram, while yellow, magenta, and cyan appear when two of
the colors overlap.
Note: hover the mouse pointer over any pixel on the selected photo to view its RGB
tone value in the histogram.
Converting Photos to Black and White
You can instantly convert a selected photo to black and white using the histogram.
To convert, select B&W. To convert back, select Color on the top of the histogram.
Note: after you convert a photo to black and white, the Black and White section of the
adjustment panel is enabled. See "Black and White Mix" on page 44 for details on
adjusting the lightness in black and white photos.
Viewing Exposed Areas
The histogram can be used to determine if the photo was shot correctly. A photo
with a histogram that arcs towards the left, indicates the photo was underexposed
(contains a lot of dark pixels), while one that arcs towards the right means there
was an overexposure (lots of lighter pixels).
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