Canon MF229dw User Manual page 230

(Brightness/Contrast)
Adjusts the brightness and contrast (the difference between the light and dark parts) of the image. To adjust while
checking on a graph, click
[Channel]
If you select [Color] for [Color Mode], you can adjust the [Red], [Green] and [Blue] color channels separately.
To adjust all three colors at the same time, select [Master]. You can combine the adjustments made in [Master]
and those made in the individual color channels.
If you select [Grayscale] for [Color Mode], only [Grayscale] is displayed.
[Brightness]
Slide
[Contrast]
Slide
is reduced to create a softer appearance. When contrast is increased, the difference between the light and dark
parts is increased to create a bolder appearance.
(Histogram)
[Channel]
If you select [Color] for [Color Mode], you can adjust the [Red], [Green] and [Blue] color channels separately.
To adjust all three colors at the same time, select [Master]. You can combine the adjustments made in [Master]
and those made in the individual color channels.
If you select [Grayscale] for [Color Mode], only [Grayscale] is displayed.
(Black-point Eyedropper)/
Click the parts on the preview image (or cropping frame) you want to specify as the darkest, the medium, and
the brightest. Slide
(Gray Balance Eyedropper Tool)
Click a part on the preview image (or cropping frame) you want to render as an achromatic color, which is black,
grey, or white, each of which does not have color depth. Color tone on the rest of the image is adjusted with the
clicked part being the average. For example, if snow on a photograph image is bluish, click this part because you
essentially want to render this part as white. When you click this part, the snow is no longer bluish, and the
entire image is adjusted so that it comes closer to natural colors. Click different parts little by little while checking
the preview image to produce the optimum color tone.
(Tone Curve Settings)
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on the upper-right of the screen.
or enter a value.
or enter a value. When contrast is reduced, the difference between the light and dark parts of the image
A histogram is a graph that shows the distribution of brightness in an image. You can adjust
the image while checking the preview image and histogram. Specify the part of the image you
want to make brightest (or darkest) in the preview image, so that the brightness balance of
the original image is automatically adjusted with the specified part being the average. Likewise,
you can also adjust the balance with the brightness of the medium tone being the average.
(Mid-point Eyedropper)/
, , or . Alternatively, you can enter a value.
The tone curve is a curved line that indicates the brightness and contrast levels of the image
(White-point Eyedropper)