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LabelRecognizerParameter Object

ScaleUpModes

Mode Properties

ScaleUpModes is a parameter for setting the mode to control the scale-up process for text line with small letter height. It consisits of one or more ScaleUpMode items and each item has its own arguments. The array index represents the priority of the item. The smaller index is, the higher priority is.

Value Type	Value Range	Default Value
string array or `ScaleUpMode` array	“SUM_SKIP” “SUM_AUTO” “SUM_LINEAR_INTERPOLATION” “SUM_NEAREST_NEIGHBOUR_INTERPOLATION”	[“SUM_AUTO”, “SUM_SKIP”, “SUM_SKIP”, “SUM_SKIP”, “SUM_SKIP”, “SUM_SKIP”, “SUM_SKIP”, “SUM_SKIP”]

See also:
ScaleUpMode Enumeration

LetterHeightThreshold

Sets the letter height threshold for scale-up.

Value Type	Value Range	Default Value
int	[0, 0x7fffffff]	0

Remarks
0 : means automatically set by the library. If the average letter height of a text line is smaller than the LetterHeightThreshold, the image will be enlarged to N times (N=2,4,8…) till N * LetterHeight >= TargetLetterHeight.

TargetLetterHeight

Sets the target letter height for scale-up.

Value Type	Value Range	Default Value
int	[0, 0x7fffffff]	0

Remarks
0 : means automatically set by the library.

Setting Methods

As JSON Parameter

ScaleUpModes as a JSON parameter is a JSON Object array. Each JSON Object has several keys for setting the mode and the value of arguments. The array index decides the priority and the mode to control the scale-up process for text line with small letter height. Default values will be used if there is no manual setting.

Json Object	Json Parameter Name	Value Type
ImageParameter	ScaleUpModes	JSON Object Array

Json Parameter Example

{
    "ScaleUpModes": [
        {
            "Mode": "SUM_AUTO",
            "LetterHeightThreshold": 10,
            "TargetLetterHeight": 50
        }
]
}