get_bar_code_objectT_get_bar_code_objectGetBarCodeObjectGetBarCodeObject (Operator)

Name

get_bar_code_objectT_get_bar_code_objectGetBarCodeObjectGetBarCodeObject — Access iconic objects that were created during the search or decoding of bar code symbols.

Signature

Description

With the operator get_bar_code_objectget_bar_code_objectGetBarCodeObjectGetBarCodeObjectGetBarCodeObject, iconic objects created during the last call of the operator find_bar_codefind_bar_codeFindBarCodeFindBarCodeFindBarCode can be accessed. Besides the name of the object (ObjectNameObjectNameObjectNameObjectNameobjectName), the bar code model (BarCodeHandleBarCodeHandleBarCodeHandleBarCodeHandlebarCodeHandle) must be passed to get_bar_code_objectget_bar_code_objectGetBarCodeObjectGetBarCodeObjectGetBarCodeObject. In addition, in CandidateHandleCandidateHandleCandidateHandleCandidateHandlecandidateHandle an index to a single decoded symbol or a single symbol candidate must be passed. Alternatively, CandidateHandleCandidateHandleCandidateHandleCandidateHandlecandidateHandle can be set to 'all'"all""all""all""all" and then all objects of the decoded symbols or symbol candidates are returned.

Depending on the option selected in ObjectNameObjectNameObjectNameObjectNameobjectName parameter the following objects are returned:

'symbol_regions'"symbol_regions""symbol_regions""symbol_regions""symbol_regions":

The regions of successfully decoded symbols are returned. When choosing 'all'"all""all""all""all" as CandidateHandleCandidateHandleCandidateHandleCandidateHandlecandidateHandle, the regions of all decoded symbols are retrieved. The order of the returned objects is the same as in find_bar_codefind_bar_codeFindBarCodeFindBarCodeFindBarCode.

'candidate_regions'"candidate_regions""candidate_regions""candidate_regions""candidate_regions":

The regions of potential bar codes are returned. If there is a total of n decoded symbols out of a total of m candidates then CandidateHandleCandidateHandleCandidateHandleCandidateHandlecandidateHandle can be chosen between 0 and (m-1). With CandidateHandleCandidateHandleCandidateHandleCandidateHandlecandidateHandle between 0 and (n-1) the original segmented region of the respective decoded symbol is retrieved. With CandidateHandleCandidateHandleCandidateHandleCandidateHandlecandidateHandle between n and (m-1) the region of the potential or undecodable symbol is returned. In addition, CandidateHandleCandidateHandleCandidateHandleCandidateHandlecandidateHandle can be set to 'all'"all""all""all""all" to retrieve all candidate regions at the same time.

'scanlines_all'"scanlines_all""scanlines_all""scanlines_all""scanlines_all", 'scanlines_valid'"scanlines_valid""scanlines_valid""scanlines_valid""scanlines_valid", 'scanlines_all_plain'"scanlines_all_plain""scanlines_all_plain""scanlines_all_plain""scanlines_all_plain", 'scanlines_valid_plain'"scanlines_valid_plain""scanlines_valid_plain""scanlines_valid_plain""scanlines_valid_plain", 'scanlines_merged_edges'"scanlines_merged_edges""scanlines_merged_edges""scanlines_merged_edges""scanlines_merged_edges":

XLD contours representing the particular detected bars in the scanlines applied on the candidate regions are returned. Note that the scanlines can be only be returned if the bar code was decoded by find_bar_codefind_bar_codeFindBarCodeFindBarCodeFindBarCode or decode_bar_code_rectangle2decode_bar_code_rectangle2DecodeBarCodeRectangle2DecodeBarCodeRectangle2DecodeBarCodeRectangle2 in 'persistence'"persistence""persistence""persistence""persistence" mode (see set_bar_code_paramset_bar_code_paramSetBarCodeParamSetBarCodeParamSetBarCodeParam for further details).

'scanlines_all'"scanlines_all""scanlines_all""scanlines_all""scanlines_all" represents all scanlines that find_bar_codefind_bar_codeFindBarCodeFindBarCodeFindBarCode could potentially create in order to decode a bar code.

'scanlines_valid'"scanlines_valid""scanlines_valid""scanlines_valid""scanlines_valid" represents only those scanlines that could be successfully decoded. The number of scanlines that has to be valid can be adjusted with set_bar_code_paramset_bar_code_paramSetBarCodeParamSetBarCodeParamSetBarCodeParam with the parameter 'min_identical_scanlines'"min_identical_scanlines""min_identical_scanlines""min_identical_scanlines""min_identical_scanlines". There will be no 'scanlines_valid'"scanlines_valid""scanlines_valid""scanlines_valid""scanlines_valid" if the symbol was not decoded. For stacked bar codes (e.g. 'GS1 DataBar Stacked'"GS1 DataBar Stacked""GS1 DataBar Stacked""GS1 DataBar Stacked""GS1 DataBar Stacked" and 'GS1 DataBar Expanded Stacked'"GS1 DataBar Expanded Stacked""GS1 DataBar Expanded Stacked""GS1 DataBar Expanded Stacked""GS1 DataBar Expanded Stacked") this rule applies similarly, but on a per-symbol-row basis rather then per-symbol.

'scanlines_merged_edges'"scanlines_merged_edges""scanlines_merged_edges""scanlines_merged_edges""scanlines_merged_edges" shows the scanlines and edges which were used for the merged scanlines (see 'merge_scanlines' in set_bar_code_paramset_bar_code_paramSetBarCodeParamSetBarCodeParamSetBarCodeParam).

get_bar_code_objectget_bar_code_objectGetBarCodeObjectGetBarCodeObjectGetBarCodeObject returns each scanline as separate XLD contour. Please note that the XLD contours returned by 'scanlines_all'"scanlines_all""scanlines_all""scanlines_all""scanlines_all", 'scanlines_valid'"scanlines_valid""scanlines_valid""scanlines_valid""scanlines_valid" and 'scanlines_merged_edges'"scanlines_merged_edges""scanlines_merged_edges""scanlines_merged_edges""scanlines_merged_edges" are meant for visualization purposes and hence consist of many XLD points. Double lines are used between edges that the bar code reader recognized as bar, whereas single lines are used for white spaces. Additional information about each scanline can be obtained with get_bar_code_resultget_bar_code_resultGetBarCodeResultGetBarCodeResultGetBarCodeResult with the parameter 'status'"status""status""status""status".

The '_plain' variants 'scanlines_all_plain'"scanlines_all_plain""scanlines_all_plain""scanlines_all_plain""scanlines_all_plain" and 'scanlines_valid_plain'"scanlines_valid_plain""scanlines_valid_plain""scanlines_valid_plain""scanlines_valid_plain" return the described scanlines in a plain format. Every edge found is returned as a point of an XLD contour. For every scanline a new XLD contour is created. Scanlines for which no edges could be found are omitted.

Execution Information

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Processed without parallelization.

Parameters

Result

The operator get_bar_code_objectget_bar_code_objectGetBarCodeObjectGetBarCodeObjectGetBarCodeObject returns the value 2 (H_MSG_TRUE) if the given parameters are correct and the requested objects are available for the last symbol search. Otherwise, an exception will be raised.

Possible Predecessors

find_bar_codefind_bar_codeFindBarCodeFindBarCodeFindBarCode

See also

get_bar_code_resultget_bar_code_resultGetBarCodeResultGetBarCodeResultGetBarCodeResult

Module

Bar Code