Canon FS 2710 manual Color Correction Gamma Value Settings, Gamma value

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Color Correction - Gamma Value Settings

You can adjust the color by changing the gamma value for the display monitor. This method is suitable for matching the image output to the particular characteristics of the display monitor in use. The method is applicable to 8-bit grayscale, 12-bit grayscale, 24-bit color (when ColorSync™ is off) and 36-bit color images.

Matching the Gamma Value to the Display Characteristics

The relationship between the data sent to a display monitor (input) and the data shown on the display (output) is expressed as the display monitor gamma value. Different display monitors may have different gamma values, which typically range from 1.4 to 2.2. Without adjustment, most display monitors reproduce images slightly darker than the original. Plug-in module FS can automatically adjust the gamma value for faithful reproduction if the display monitor has a gamma value of 1.4. Display monitors with other default gamma values have to be set manually.

Gamma value

Plug-in module FS and the display monitor have different gamma values. During a scanning job, Plug-in module FS receives the image from the scanner as input and sends it to the parent application as output. The gamma value in this interval where Plug-in module FS converts input to output is the Plug-in module FS gamma value. On the other hand, the data received from Plug-in module FS as input is sent to the display monitor as output. The gamma value in this interval where the image input from Plug-in module FS is converted to output for the display monitor is the display monitor gamma value.

Setting the display monitor gamma value causes the scanner gamma value to be calibrated automatically as the inverse value. For example, if the display monitor gamma value is set to 1.4, then the scanner gamma value is calibrated at 0.71 (the inverse of 1.4).

Hint

• Please read the documents shipped with your display or contact the manufac- turer’s customer service department to obtain the correct gamma value for your particular display model.

•If you intend to adjust the color tone with ColorSync™, change the settings in the ColorSync™ System control panel (found within the Control Panels folder) and do not manually change the gamma value settings as described in the following pages. See Auto Tone Correction (ColorSync™) (p. 64).

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