User`s manual

69
Chapter 10 Image Capturing
10.1 Outline
The scanner supports image capturing that allows you to capture a graphic as a bitmap (BMP) or JPEG image and
output it to the host computer. The JPEG image offers three quality choices--standard, high, and low.
The image size can be selected from standard WVGA, 1/4 WVGA and 1/16 WVGA. If you select 1/4 WVGA or 1/16
WVGA, select also the output image area--the full image area or the center portion of the image area. When the full
image area is selected, the scanner thins out the resolution of the full image area by skipping every other pixel so that
the image quality becomes low; when the center portion is selected, the scanner extracts the center portion of the
image area so that the visual area becomes smaller but the image quality does not change.
The scanner can also output a thumbnail to help you aim at a target. The thumbnail images can be saved as a BMP or
JPEG image in 1/64 WVGA or 1/4 WVGA, respectively.
You can select the output format, image size, output image area and whether or not to use a thumbnail by modifying
the parameters of the IMAGEOUT command.
Note: Selecting the HID profile disables the image capturing function.
10.2 Image Capturing Specifications
(1) Output file format
BMP or JPEG file format
(2) Image size and output image area
Image size Number of pixels BMP JPEG Image output area
Standard WVGA 752 x 480   Full image area
1/4 WVGA 376 x 240   Full or center portion of the image area
1/16 WVGA 188 x 120   Full or center portion of the image area
Thumbnail (1/64 WVGA) 94 x 60  -- Full image area
Thumbnail (1/4 WVGA) 376 x 240 --  Full image area
(3) Communications protocol for image transmission
Xmodem 1K
(4) Image output command
IMAGEOUT#1#m#n Enable the thumbnail transmission
IMAGEOUT#1#m#n#o Disable the thumbnail transmission
The selections available for parameters l, m, n and o are as follows:
l: Output file format
B BMP
J or J0 JPEG (Medium)
J1 JPEG (High)
J2 JPEG (Low)