Get Set OCR Property (Get Set OCR Property (I32)) (G Dataflow)

The minimum acceptance level at which an object is considered a trained character. The range of valid values for this property is 0 to 1000. The default value is 700.

The minimum object size, in pixels, at which an object is a potential identifiable character. The minimum value allowed for this property is 1. The value of this property must not exceed Max Char Size. The default is 20 pixels.

The maximum object size, in pixels, at which an object is a potential identifiable character. Set this value to 65536, which is also the default value, to specify that all values greater than Min Char Size are acceptable. The value of this property must not be less than Min Char Size.

The minimum amount of space, in pixels, that can be between characters. This value must not be less than the Max Horiz Element Spacing. The default value is 1.

The maximum horizontal spacing, in pixels, between the elements that are combined to form a single character. For stroke characters, set this value to 1 or 2. For segment characters or pin stamp characters, set this value to 5 or higher. This value cannot exceed the actual character spacing value specified by the Min Char Spacing property. The horizontal spacing value is required to ensure that OCR correctly trains and reads characters that consist of several elements. The minimum value allowed for this property is 0. The default value is 1.

The maximum vertical spacing, in pixels, between the elements that are combined to form a single character. The default value is 0, which specifies that any object in the ROI should be considered part of a valid object.

The minimum width, in pixels, of a character bounding rectangle. The value of this property cannot exceed Max Bounding Rect Width. The minimum value allowed for this property, which is also the default value, is 1.

The maximum width, in pixels, of a character bounding rectangle. Set this value to 65536, which is also the default value, to specify that all values greater than Min Bounding Rect Width are acceptable. The value of this property must not be less than Min Bounding Rect Width.

The minimum height, in pixels, of a character bounding rectangle. The value of this property cannot exceed Max Bounding Rect Height. The minimum value allowed for this property, which is also the default value, is 1.

The maximum height, in pixels, of a character bounding rectangle. Set this value to 65536, which is also the default value, to specify that all values greater than Min Bounding Rect Height are acceptable. The value of this property must not be less than Min Bounding Rect Height.

The read strategy determines how closely OCR analyzes images in the reading process to match objects with trained characters. The following list includes valid values:

• Aggressive—Use few criteria to determine character match.
• Conservative—Use extensive criteria to determine character match.

The default value is Aggressive.

The maximum aspect ratio variation percentage that the Read Text node allows when it identifies characters. The minimum value for this property is 100, which specifies that the identified object must match the trained character exactly in size and height/width ratio. The default aspect ratio is 400.

The number of erosions to perform to remove small objects. After performing the specified number of erosions, OCR restores remaining objects to their original uneroded size. The default value is 0.

The level of character criteria that OCR uses to determine if an object matches a trained character. The default is low resolution.

The number of characters in the trained character set. This property is read-only.

The character that the Read Text node substitutes for objects it cannot match with any of the trained characters. The default value is a question mark (?).

Set this property to TRUE for OCR to remove objects that are touching the ROI you specified. The removed objects are not considered for training or reading. When you set this property to FALSE, OCR retains objects that are touching the ROI. The default value is FALSE.

Set this property to TRUE to automatically adjust the location of the character bounding rectangle when characters overlap vertically. This property is useful when you are working with an image that contains slanted characters. If the characters are not slanted and/or do not overlap vertically, set this property to FALSE. The default value is FALSE.