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7.4.3 Image Setup
[Brightness]
make the image brighter or darker by a specified amount. When increasing brightness, you
may find that you lose some contrast on the brightest details in the image while the rest of the image has
the same contrast as before.
[Contrast]
Contrast is defined as the separation between the darkest and brightest areas of the image.
Increase contrast and you increase the separation between dark and bright, making shadows darker and
highlights brighter. Decrease contrast and you bring the shadows up and the highlights down to make
them closer to one another. Adding contrast usually adds "pop" and makes an image look more vibrant
while decreasing contrast can make an image look duller.
[Hue]
Change is similar to rotating a color wheel to select a different mixture of colors
[Saturation]
Saturation is similar to contrast, however instead of increasing the separation between
shadows and highlights, we increase the separation between colors.
[Sharpness]
Sharpness can be defined as edge contrast, that is, the contrast along edges in a photo. When
we increase sharpness, we increase the contrast only along/near edges in the photo while leaving smooth
areas of the image alone.
[Auto Exposure Target]
Automatic exposure (abbreviation: AE) mode automatically calculates and adjusts
exposure settings to match (as closely as possible) the subject's mid-tone to the mid-tone of the
photograph. Exposure is a combination of the length of time and the illuminance at the photosensitive
material. Exposure time is controlled in a camera by shutter speed and the illuminance by the lens
aperture and the scene luminance. Slower shutter speeds (exposing the medium for a longer period of
time), and greater lens apertures (admitting more light), and higher-luminance scenes produce greater
exposures.
