Canon CanoScan FB 1200S User Manual - Page 42
To Adjust a Histogram, Click the [Auto] button.
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STEP 4 To Adjust a Histogram Specify the area of the image (the entire area to be scanned) for which a histogram will be generated. See Scan Area Settings (p. 34). The histogram will not display correctly if an extremely small area is selected. To select small areas, first expand the display with the Zoom In button. See Zooming (p. 35). Click the histogram tab in the Tone adjustment dialog to display the histogram options. Click the [Auto] button. Although you can freely move the shadow mark and highlight mark to another position, the image can be adjusted easily for optimum effect with the Auto button. The histogram settings can be adjusted for all channels (Master) or for individual channels (R, G, B). The selectors are displayed to the left of the histogram graph (Master, R, G, B). The Master selection is unavailable if Grayscale has been selected as the scan mode. Shadow Mark All of the data to the left of this mark is set to the shadow (0) value. Drag the mark to the right or left. Displays the current level at the shadow mark. Click the up or down arrows in the spinbox to increase or decrease the setting or enter a number directly into the entry box (0~254). To restore the histogram settings, click this [Reset] button. To restore all settings to their defaults, click the [Reset] button. Clicking directly on this bar causes the shadow or highlight mark, whichever is closest, to advance to that position. Highlight Mark All of the data to the right of this mark is set to the highlight (255) value. Drag the mark to the right or left. Displays the current level at the highlight mark. Click the up or down arrows in the spinbox to increase or decrease the setting or enter a number directly into the entry box (1~255). The histogram settings can be saved in a file and reloaded for later use. Black Eyedropper Button Click the Black Eyedropper and click the position in the preview image you want to set to black (0). 42 Auto Button Automatically sets the highlight and shadow settings for optimum effects. 42 White Eyedropper Button Click the White Eyedropper and click the position in the preview image you want to set to white (255).