3. Set Resolution (ESC R)

You can set different values for the resolution for the main scan (horizontal direction) and the sub scan (vertical direction). You can find the resolutions available by reading the scanner’s user’s manual or, from within a program, sending the ID Request command.

ESC R and other commands

Multiple resolutions are available on all scanners. You can check the resolutions available on the currently connected scanner by checking the data block returned by the scanner when you send the ID Request command. For B5- and A5-level scanners, you can select a resolution from 50 dpi to the maximum available resolution of the scanner in 1-dpi increments. Trying to select a resolution that is not available results in a command error.

This command determines the number of pixels that can be scanned within the scanning area, based on the current zoom setting. Because of this, you should always set the zoom and resolution before setting the scanning area.

Even if your desired resolution is not available on the current scanner, you can still adjust the zoom and resolution settings to approximate your desired resolution. First set the resolution to the value closest to your desired setting; then adjust the zoom until the resolution value approximates your desired setting.

4. Set zoom (ESC H)

You can set the zoom (image enlargement/reduction) for the main scan and sub scan independently, between the values of 50% to 200%.

After the scanning resolution is set, this command enlarges or reduces the number of dots scanned, independent of the resolution. This results in the scanned image being enlarged or reduced.

Command Usage 2-7