Imaging Guide Document Reader
Disclaimer Hand Held Products (“Hand Held Products”) reserves the right to make changes in specifications and other information contained in this document without prior notice, and the reader should in all cases consult Hand Held Products to determine whether any such changes have been made. The information in this publication does not represent a commitment on the part of Hand Held Products.
LED Safety Statement This device has been tested in accordance with IEC60825-1 LED safety, and has been certified to be under the limits of a Class 1 LED device. Laser Eye Safety Statement This product is under the limits of a class 2 laser device. This device has been tested in accordance with and complies with IEC60825-1: 1993+A1+A2 and 21 CFR 1040.10 and 1040.11, except for deviations pursuant to Laser Notice No. 50, dated July 26, 2001. LASER LIGHT, DO NOT STARE INTO BEAM, CLASS 2 LASER PRODUCT, 1.
Document Reader Identification Compliance Label location LASER LIGHT. DO NOT STARE INTO BEAM CLASS 2 LASER PRODUCT 1.0 mW MAX OUTPUT: 650nM IEC60825-1: 1993+A1+A2 Complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated July 26, 2001.
Table of Contents Chapter 1 - Imaging Commands Single-Use Basis ................................................................................................................................. 1-1 Command Syntax ................................................................................................................................ 1-1 Step 1 - Take a Picture Using IMGSNP ....................................................................................1-1 Image Snap - IMGSNP ...................
D - Pixel Depth ....................................................................................................................1-15 F - File Format .....................................................................................................................1-15 H - Height of Signature Capture Area .................................................................................1-15 K - Gamma Correction .............................................................................................
1 Imaging Commands The document reader is like a digital camera in the way it captures, manipulates, and transfers images. The following commands allow you to alter the way the document reader performs these functions. Single-Use Basis Imaging Commands with their modifiers send instructions to the document reader on a single-use basis, and take effect for a single image capture. Once that capture is complete, the document reader reverts to its imaging default settings.
T - Wait for Trigger Waits for a hardware button push before taking the image. This is only available when using Photo Style (1P). 0T Takes image immediately (default) 1T Waits for a button push, then takes the image L - LED State Determines if the LEDs should be on or off, and when. Ambient illumination (0L) is preferred for taking pictures of color documents, such as ID cards, especially when the document reader is in a stand. LED illumination (1L) is preferred when the document reader is hand held.
G - Gain Gain is used in Manual Style only (2P). Like a volume control, the gain modifier boosts the signal and multiplies the pixel value. As you increase the gain, the noise in an image is also amplified. 1G No gain (default) 2G Medium gain 4G Heavy gain 8G Maximum gain Example of Gain at 1G: Example of Gain at 4G: Example of Gain at 8G: W - Target White Value Sets the target for the median grayscale value in the captured image.
% - Target Set Point Percentage Sets the target point for the light and dark values in the captured image. A setting of 75% means 75% of the pixels are at or below the target white value, and 25% of the pixels are above the target white value. Altering this setting from the default is not recommended under normal circumstances. To alter grayscale values, W - Target White Value should be used.
Step 2 - Ship a Picture Using IMGSHP or IMGACP Image Ship - IMGSHP An image is taken whenever the button is pressed, or when the Image Snap (IMGSNP) command is processed. The last image is always stored in memory. You can “ship” the image by using the IMGSHP or IMGACP command. The image ship and image auto crop commands have many different modifiers that can be used to change the look of the image output by the document reader.
IMGSHP/IMGACP Modifiers A - Infinity Filter Enhances pictures taken from very long distances (greater than 10 feet or 3m). The Infinity Filter should not be used with Image Auto Crop - IMGACP (page 1-5). 0A Infinity filter off (default) 1A Infinity filter on Example of Infinity Filter off (0A) from approximately 12 feet (3.66m) away: Example of Infinity Filter on (1A) from approximately 12 feet (3.
E - Edge Sharpen An edge sharpen filter cleans up the edges of an image, making it look cleaner and sharper. While edge sharpening does make the image look cleaner, it also removes some fine detail from the original image. The strength of the edge sharpen filter can be entered from 1 to 24. Entering a 23E gives the sharpest edges, but also increases noise in the image.
I - Invert Image Invert image is used to rotate the image around the X or Y axis. Note: This feature should only be used with Image Ship - IMGSHP (page 1-5). Using this feature with Image Auto Crop IMGACP (page 1-5) may produce undesired results since Image Auto Crop attempts to rotate an image to a horizontal display.
IR - Image Rotate Note: This feature should only be used with Image Ship - IMGSHP (page 1-5). Using this feature with Image Auto Crop IMGACP (page 1-5) may produce undesired results since Image Auto Crop attempts to rotate an image to a horizontal display.
IS - Unsharp/Brighten Filter The Unsharp/Brighten Filter automatically sharpens the text and brightens the contrast of the image, making text more readable. This is similar to the Image Adaptive Text Filter, however it brightens the image as well. You should test both image processing techniques to determine which filter works best for your environment. Note: The Unsharp/Brighten Filter should not be used concurrently with the IU - Image Adaptive Text Filter.
L, R, T, B, M - Image Cropping Note: Image Cropping should not be used with Image Auto Crop - IMGACP (see page 1-5). Ships a window of the image by specifying the left, right, top, and bottom pixel coordinates. Device columns are numbered 0 through 1279, and device rows are numbered 0 through 959. nL The left edge of the shipped image corresponds to column n of the image in memory. Range: 000 - 1279. (Default = 0) nR The right edge of the shipped image corresponds to column n - 1 of the image in memory.
S - Pixel Ship Pixel Ship sizes an image in proportion to its original size. It decimates the image by shipping only certain, regularly spaced pixels. For example, 4S would transmit every fourth pixel from every fourth line. The smaller number of pixels shipped, the smaller the image, however, after a certain point the image becomes unusable.
V - Blur Image Smooths transitions by averaging the pixels next to the hard edges of defined lines and shaded areas in an image. 0V Don’t blur (default) 1V Blur Example of Blur Image Off (0V): Example of Blur Image On (1V): W - Histogram Ship A histogram gives a quick picture of the tonal range of an image, or key type. A low-key image has detail concentrated in the shadows; a high-key image has detail concentrated in the highlights; and an average-key image has detail concentrated in the midtones.
Intelligent Signature Capture - IMGBOX IMGBOX allows you to configure the size and location of a signature capture area relative to its proximity to a barcode. This allows you to tailor a signature capture area to a specific form. In order to use IMGBOX, you need a set form where the signature box location is in a known location relative to a barcode. You can input the overall size of the signature area, as well as specify how far the signature area is from the barcode, vertically and horizontally.
B - Output Image Height This option is used to size the image vertically. If using this option, set the resolution (R) to zero. Example of Image Height set to 50B: Example of Image Height set to 100B: D - Pixel Depth This indicates the number of bits per pixel in the transmitted image, which defines whether it will be grayscale or black and white.
R - Resolution of Signature Capture Area The resolution is the number of pixels that the document reader outputs per each minimum bar width. The higher the value for R, the higher the quality of the image, but also the larger the file size. Values begin at 1000. The document reader automatically inserts a decimal point between the first and second digit. For example, use 2500 to specify a resolution of 2.5.
2 Serial Default Commands The following serial default commands are used to program the imaging features for your document reader. For complete descriptions of each command, refer to the corresponding page in this manual. For non-imaging programming commands, refer to the Barcode Manual. The following commands can be sent via a PC COM port using terminal emulation software.
Concatenation of Multiple Commands Multiple commands can be issued within one Prefix/Storage sequence. Only the Tag, SubTag, and Data fields must be repeated for each command in the sequence. If additional commands are to be applied to the same Tag, then the new command sequence is separated with a comma (,) and only the SubTag and Data fields of the additional command are issued. If the additional command requires a different Tag field, the command is separated from previous commands by a semicolon (;).
Menu Commands The following chart lists the settings for each of the serial default commands. The factory default setting is indicated by an asterisk (*).
Selection Image Ship (continued) Image Auto Crop (IMGACP) 2-4 Setting Serial Command * Indicates default # Indicates a numeric entry For full description, see page Invert Image around X axis IMGNVX1 1-8 Invert Image around Y axis IMGNVY1 1-8 *Noise Reduction Off IMGFSP0 1-8 Noise Reduction On IMGFSP1 1-8 *Rotate Image Off IMGROT0 1-9 Rotate Image 90° right IMGROT1 1-9 Rotate Image 180° IMGROT2 1-9 Rotate Image 90° left IMGROT3 1-9 *Adaptive Text Filter Off IMGAUT0 1-9 Adap
Selection Image Auto Crop (continued) Intelligent Signature Capture (IMGBOX) Setting Serial Command * Indicates default # Indicates a numeric entry For full description, see page File Format - TIFF grayscale IMGFMT3 1-7 File Format - Uncompressed binary IMGFMT4 1-7 File Format - Uncompressed grayscale IMGFMT5 1-7 File Format - BMP IMGFMT8 1-7 *Histogram Stretch Off IMGHIS0 1-7 Histogram Stretch On IMGHIS1 1-7 Invert Image around X axis IMGNVX1 1-8 Invert Image around Y axis IMGN
Selection Intelligent Signature Capture (continued) 2-6 Setting Serial Command * Indicates default # Indicates a numeric entry For full description, see page File Format - BMP IMGFMT8 1-15 Height of Signature Capture Area no serial command 1-15 *Gamma Correction Off IMGGAM0 1-15 Gamma Correction On (1-255) IMGGAM### 1-15 Resolution of Signature Capture Area (0-2500) no serial command 1-16 Barcode Aspect Ratio no serial command 1-16 Width of Signature Capture Area no serial command
3 Customer Support Technical Assistance If you need assistance installing or troubleshooting, please call your Distributor or the nearest Hand Held Products technical support office: North America/Canada Telephone: (800) 782-4263 Fax number: (315) 554-6705 E-mail: natechsupport@handheld.com Latin America Telephone: (803) 835-8000 Telephone: (800) 782-4263 E-mail: latechsupport@handheld.com Brazil Telephone: +55 (21) 3535-9100 Fax: +55 (21) 3535-9105 E-mail: brsuporte@handheld.
Latin America Telephone: (803) 835-8000 Telephone: (800) 782-4263 Fax: (239) 263-9689 E-mail: laservice@handheld.com Brazil Telephone: +55 (21) 3535-9100 Fax: +55 (21) 3535-9105 E-mail: brservice@handheld.com Mexico Telephone: +52 (55) 5203-2100 Fax: +52 (55) 5531-3672 E-mail: mxservice@handheld.com Europe, Middle East, and Africa Telephone: +31 (0) 40 2901 633 Fax: +31 (0) 40 2901 631 E-mail: euservice@handheld.com Asia Pacific Telephone: +852-2511-3050 Fax: +852-2511-3557 E-mail: apservice@handheld.
Hand Held Products, Inc. 700 Visions Drive P.O.
