Canon CanoScan FS2700F User Manual - Page 53

Adjusting Gamma Values Expert Mode, Adjusting Threshold Values Easy/Expert Mode, p. 63

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Step 3 • Adjusting Images Adjusting Gamma Values (Expert Mode: p. 63) Match the brightness of the image data to the color characteristics of the display device by changing the gamma values of the data. Use this method to match the scanned image tones on the display to the tones of the original image. This method can be used on these image types: 8-Bit Grayscale/12-Bit Grayscale/24-Bit Color/36-Bit Color Adjusting Tone Curves (Expert Mode: p. 65) Correct the brightness of the image by adjusting the balance between highlights and shadows in the input and output values of the image data. As a highly selective method, adjusting the tone curve limits the effect on the overall image and can smoothen halftone gradients more finely than the histogram method. This method can be used on these image types: 8-Bit Grayscale/12-Bit Grayscale/24-Bit Color/36-Bit Color Adjusting Color Balance (Expert Mode: p. 67) Correct the balance between the three primary colors in a color image: red, green and blue (RGB). Use this method when a particular color tone is too strong or weak. This method can be used on these image types: 24-Bit Color/36-Bit Color Adjusting Threshold Values (Easy/Expert Mode: p. 69) Adjust the level of brightness at which the original image data is represented by either black or white. This method can be used on this image type: Black and White 53

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53
Step 3 • Adjusting Images
Adjusting Gamma Values (Expert Mode:
p. 63
)
Match the brightness of the image data to the color
characteristics of the display device by changing the
gamma values of the data. Use this method to match
the scanned image tones on the display to the tones of
the original image.
This method can be used on these image types:
8-Bit Grayscale/12-Bit Grayscale/24-Bit Color/36-Bit Color
Adjusting Tone Curves (Expert Mode:
p. 65
)
Correct the brightness of the image by adjusting the
balance between highlights and shadows in the input
and output values of the image data. As a highly
selective method, adjusting the tone curve limits the
effect on the overall image and can smoothen halftone
gradients more finely than the histogram method.
This method can be used on these image types:
8-Bit Grayscale/12-Bit Grayscale/24-Bit Color/36-Bit Color
Adjusting Color Balance (Expert Mode:
p. 67
)
Correct the balance between the three primary colors
in a color image: red, green and blue (RGB). Use this
method when a particular color tone is too strong or
weak.
This method can be used on these image types:
24-Bit Color/36-Bit Color
Adjusting Threshold Values (Easy/Expert Mode:
p. 69
)
Adjust the level of brightness at which the original
image data is represented by either black or white.
This method can be used on this image type:
Black and White