OCRMaxSettings

Specifies the polarity of the characters in the input image.

Specifies how the widths of characters in the font are expected to vary, which determines how character fragments should be merged or split.

Specifies the minimum width of the character region of a character, in pixels (1 - 1000; default = 3), that a character must have to be reported. This setting helps to filter background noise or other non-text features.

Specifies whether or not the function should account for the maximum allowable width of the character region of a character. This setting may be used to help the function determine if a character fragment should be split or merged. If the character fragment should be split, the Character Width Type parameter determines the proper technique to be used.

Specifies the maximum allowable width of the character region of a character, in pixels (1 - 5000; default = 100).

Specifies the minimum height of the character region of a character, in pixels (1 - 1000; default = 3), that a character must have in order to be reported. This setting helps to filter background noise or other non-text features.

Specifies whether or not the function should account for the maximum allowable height of the character region of a character. This value is used in two ways: First, this value is used when finding the line, as a whole, such as reject vertically adjacent noise or other lines of vertically adjacent characters. Second, an individual character whose height exceeds this value is trimmed to meet this height.

Specifies the maximum allowable height of the character region of a character, in pixels (1 - 5000; default = 100).

Specifies whether or not the function accounts for the minimum allowable aspect ratio of a character, where the aspect ratio is defined as the height of the entire line of characters, divided by the width of the character region of a character.

Specifies the minimum allowable aspect ratio (0 - 500; default = 80) of a character. This setting may be used to indirectly set the maximum width of characters by using the overall height of the line of characters, where the maximum width equals the line height, divided by the Minimum Character Aspect Ratio value. Character fragments wider than allowed by this parameter are not merged, and are split to form two or more character fragments that are not too wide (which is controlled by the Character Width Type parameter).

Specifies the angle search range (0 - 45; default = 0), in degrees.

Specifies the skew search range (0 - 45; default = 0), in degrees.

Specifies how the function should merge character fragments when forming characters during segmentation. Determines whether or not two character fragments are required to overlap to be considered as a part of a character, or whether or not character fragments with a horizontal gap between them may be considered as part of a character.

Specifies the minimum fraction (0 - 100; default = 0) by which two character fragments must overlap each other horizontally, in order for the two character fragments to be considered as part of the same character. The default value (0) merges any two character fragments that overlap by at least 1 pixel. Larger values require that the character fragments overlap more substantially. For applications where some character pairs are intentionally overlapped horizontally (also called kerning), or cases where the Refine stage cannot completely correct for rotation or skew (typically because of inconsistent printing), the default value is necessary.

Specifies the maximum horizontal gap size, in pixels (0 - 1000; default = 5), that can occur within a single character, even for damaged characters.

Specifies the minimum horizontal gap size, in pixels (0 - 1000; default = 0), that must occur between two character fragments to be belong to different characters. The gap is measured from the right edge of the character region of one character, to the left edge of the character region of the next character. If the gap between two fragments is smaller than this value, then the fragments must be considered to be part of the same character, unless the combined character would be too wide (as specified by the Maximum Character Width and/or Minimum Character Aspect Ratio parameters).

Specifies the minimum number of foreground (such as text) pixels (0 - 1000; default = 15) that a character fragment must have in order to be considered for possible inclusion in a character. When setting this value, it must be set so that is small enough to keep real pieces of text, while still being large enough to exclude small fragments from background noise. For dot-matrix text or text that contains small characters such as periods, a smaller value may be necessary. For solid stroke text, where the characters do not tend to break up into multiple, smaller pieces, a larger value may be necessary.

Specifies the minimum number of foreground (such as text) pixels (0 - 5000; default = 30) that a binarized character must have in order to be reported. Characters with too few pixels are discarded. This setting helps to filter background noise or other non-text features.

Specifies the mode used to normalize the image, which removes background variation to utilize all 256 greyscale values (0 - 255).

Specifies whether or not to remove everything from a normalized image that does not have the same stroke width as the as the rest of the image. This option can remove some types of non-text features, such as thin lines that might otherwise connect nearby characters. This option can also remove some low-contrast background variations that might otherwise exceed the binarization threshold and create false fragments or interconnect nearby characters. However, using this option may cause problems if the text does not have a consistent stroke width or the text has significant variable contrast (such as parts of some strokes are very faint).

Specifies whether or not the function completely ignores any fragments that touch any border of the ROI. Ignoring such fragments can be useful for non-text features, such as the edges of labels, that might be included within the ROI.

Specifies a percentage modifier (0 - 100; default = 50) in the range that is used to compute the binarization threshold, in the normalized image, that binarizes the image between text and background. For example, the default setting of 50% would produce a binarization threshold of roughly 128 (on a 0-255 greyscale range), with 0 equaling Black on White text, and 100 equaling White on Black text. Using a value less than 50% alters the binarization threshold so that there is less text and more background, whereas using a value greater than 50% produces less background and more text. Typically, the default value correctly binarizes the image. However, in cases where there is background texture or other background variations, decreasing this value may help compensate for the background variations.

Specifies the minimum amount of contrast [in grayscale levels (0 - 255; default = 30)] of a fragment as a whole, relative to the threshold in the normalized image, in order to be considered for possible inclusion in a character. Each foreground pixel in a fragment is always guaranteed to meet the threshold, but if all of the pixels in a fragment are very close to the threshold, then the fragment is likely just noise, rather than text. A value of 0 prevents low-contrast fragments from being rejected.

Specifies the distance, as a percentage of character height (0 - 1000; default = 0), that a fragment may be vertically removed from the "mainline" running horizontally through the text. Ordinarily, characters are expected to lie along a straight, horizontal line after being refined (the stage of compensating for angular orientation and skew). However, characters may sometimes exhibit "jitter," where there may be vertical drift of the characters' positions. With the default setting, these character fragments would be rejected because they do not lie along the "mainline" of characters. Increasing this parameter setting allows the function to keep fragments that do not lie along the "mainline" of characters.

Specifies the type of character analysis mode to perform to determine the optimal character segmentation. This parameter determines whether or not to perform additional analysis beyond the Group stage.

Specifies the minimum pitch, in pixels (0 - 1000; default = 0), that can occur between two characters, where the pitch is computed based on the Character Pitch Position parameter. If the pitch between two fragments is smaller than this, then they must be considered to be part of the same character, unless the combined character would be too wide (as specified by the Maximum Character Width or Minimum Character Aspect Ratio parameters).

Specifies how the pitch between two successive characters should be measured. Pitch is defined as the distance between (approximately) corresponding points on adjacent characters, and not the distance from the end of one character to the beginning of the next character (which is called the inter-character gap). For fixed-pitch fonts in which the characters have different widths, typically the pitch has a consistent value only when using the appropriate pitch metric A metric is a data value with additional context such as type or properties that explain what the value means and how it is used or shown, helping systems understand and work with the data correctly..

Specifies whether the spacing between successive characters has a single, fixed value, or varies, depending on the particular characters. Pitch is defined as the distance between (approximately) corresponding points on adjacent characters, and not the distance from the end of one character to the beginning of the next character (which is called the inter-character gap).

Specifies an acceptable X-scale factor (5 - 50; default = 10) between the trained character rectangle and the run-time character rectangles. When enabled, only instances that satisfy the scale constraints are computed.

Specifies an acceptable Y-scale factor (5 - 50; default = 18) between the trained character rectangle and the run-time character rectangles. When enabled, only instances that satisfy the scale constraints are computed.

Specifies whether or not the function should maintain the aspect ratio when resampling the unwrapped image at run-time.

Specifies whether or not the function performs additional character validation during classification.

Specifies an image preprocessing function to perform prior to classification.

Specifies whether or not, at each character position, to constrain the results to only include characters specified by the fielding of the character. When enabled, all other characters in the font are ignored, regardless of their classification score.

Specifies whether or not fielding is run in fixed-length or variable-length mode.

Specifies the maximum acceptable string length (0 - 100; default = 25).

Specifies the minimum acceptable string length (0 - 100; default = 1).

Specifies the fielding subsequences to be considered, which must start at a position that is no greater than this index value (0 - 100; default = 100).

Specifies the fielding subsequences to be considered, which must end at a position that is no greater than this index value (0 - 100; default = 0).