7.4

metadata field. This option allows only one printable replacement character. By default, this character is an empty
space.Note: Non-printable characters are the first 32 characters in ASCII character table (Ex.: form-feed, newline, car-
riage return characters)
l Scan Interval: Set a scan interval in pixels of image scanning. This property directly affects the performance and
quality of the recognition. A greater interval value means better performance, but a lower recognition confidence level,
and vice versa. For example, a value of 1 means that every image line will be scanned. By default, the Scan Interval is
set to 1.
l Threshold level [0..255]: Set to represent the color threshold level in order to distinguish foreground pixels from
background pixels in color or gray scale images. Value can be between 0 and 255, corresponding to the pixel intensity
value, from 0 (black) to 255 (white). Therefore, defining a threshold value of 128 means that the pixels with an inten-
sity greater than 128 will be considered as white, while those less than 128 will be considered black. The value 0 means
that the color threshold level will be calculated automatically depending on the image. By default Threshold level
[0..255] is 0. This parameter is ignored with binary images (black and white images).
On Error Tab
The On Error Tab is common to all tasks. Details can be found on Task Properties Dialog.
If storing the message or ID, if they are store in a jobinfo they will be available in any error handling process where errors are
being forwarded. In all cases, if your process continues after the error, the contents of the variables selected in this window
will be available for the rest of your process, or whenever they are overwritten.
Common Errors
Though some error messages are specific to a task in particular, others may apply to any and all tasks because they are
related more to the system than to PlanetPress itself. Some examples would be W3813, W3830, W3991, W4005. These cor-
respond to issues such as not having any space to write files, permission errors on folders or files, etc.
Metadata Implementation
The Barcode Scan task reads each scanned file and outputs the values read from barcode(s) on the page(s) into metadata
depending of the selected Process by option:
l If the selected option is process by page, then the metadata file is created and overwritten for each new scanned
page.
l If the selected option is process by file, thenonly one metadata file will be created(or updated).
Note: If metadata was created previously in the process, the task only adds new fields to the existing metadata at the datap-
age level.
Metadata Fields
The barcode valuesare stored at the datapage level of the metadata. In the following defintions, the first 2 metadata fields are
for standard use,while the next 8 fields contain '_1_' in their name. This number represents the barcode index on the page. If
there is more than one barcode on the same page, these metadata fields will be defined as many times as there are barcodes
on the page, except that the middle number (..._X_...) will increment according to the barcode index (e.g. Barcode_2_Value,
Barcode_3_Value, etc.).
l BarcodeValue: Metadata field representing the value of the barcode. When multiple barcodes are present on the
page, this field is present multiple times.
l BarcodeCount: Metadata field representing the number of barcodes on the page.