ReadTextOptions
NI Vision configuration settings you want to use during the reading process.
Refer to the NI OCR Training Interface Help for more information.
Elements
| Name | Type | Description | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| validChars[255] | String255 |
An array of strings that specifies the valid characters. The string at each index in the array specifies the valid characters for the corresponding character position in the ROI. You can specify a string of valid characters for each element of the array, or you can use one of the predefined strings of characters from the following table.
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| numValidChars | int | The number of strings in the validChars array that you have initialized. Acceptable values range from 0 to 255. Set this element to 0 to specify that all characters are valid for all positions. | ||||||||||||||||||
| substitutionChar | char | The character to substitute for objects that the function cannot match with any of the trained characters. | ||||||||||||||||||
| readStrategy | ReadStrategy | The read strategy, which determines how closely the function analyzes images in the reading process to match objects with trained characters. | ||||||||||||||||||
| acceptanceLevel | int | The minimum acceptance level at which an object is considered a trained character. Acceptable values range from 0 to 1000. | ||||||||||||||||||
| aspectRatio | int | The maximum aspect ratio variance percentage for valid characters. The minimum value for this element is 100, which specifies that identified objects are valid only if they match the trained character exactly in size and height/width ratio. Set this element to IMAQ_ASPECT_RATIO_INDEPENDENT to specify that aspect ratio does not affect character validity. | ||||||||||||||||||
| readResolution | ReadResolution | The read resolution, which determines how much of the trained character data the function uses to match objects to trained characters. |