Histogram parameters < Main Menu
Enables and customizes the Live Histogram feature.
Histogram Anatomy
The horizontal component of a histogram runs from 0 to 255. What is
important to understand is the “0” and “255” are not values…they are
labels representing a color value. When you see a line in the middle
of the histogram (label “127”) it’s saying “this is how many ‘127’s there
are in the image.”
The vertical component of a histogram is the count of pixels at a given level. The bottom is zero and the
top represents the largest count of values for a label. So if you have a 7MP image and every color is
“127”, then the top of the histogram represents 7 million pixels.
RGB Histogram
RGB histograms simply count pixels at each level. The RGB histogram of an image of three boxes (red,
green, and blue) where every color has a value of 127 would be a single line in the middle of the
histogram (at label “127”.)
Luminance (Y) Histogram
Luminance histograms attempt to factor in the perceived brightness of colors. A luminance histogram of
an image of three boxes (red, green, and blue) where every color has a value of 127 will show three lines
at labels “38” (red- x 0.3), “75” (green x 0.59), and “14” (blue x .11).
Show live histogram [Donʼt, Always, Shoot] < Histogram parameters < Main Menu
•
Donʼt – Don’t show histogram on LCD.
•
Always – Always show the histogram on the LCD.
•
Shoot – Only show the histogram when shutter is half-pressed.
Histogram layout [RGB, Y, RGB Y, R G B, RGB all, Y all, Blend, Blend Y]
•
RGB – Displays the RGB histogram only.
•
Y – Displays the luminance histogram only.
•
RGB Y – Displays RGB above luminance.
•
R G B – Displays three histograms, one for each color.
•
RGB all – Displays all 5 variations of histograms with RGB on top.
•
Y all – Displays all 5 variations of histograms with luminance on top.
•
Blend – Combines the three histogram of the R G B display into one.
•
Blend Y – Same as Blend but with the addition of luminance below.
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