utilities library
This library is part of the Textify package. Collection of utility functions for image processing and text extraction.
Classes
Functions
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artifactFromImage(
Image image) → Future< Artifact> - Creates a Artifact from a Image.
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artifactValleysOffsets(
Artifact artifact) → List< int> - Returns a list of column indices where the artifact should be split
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calculateThreshold(
List< int> histogram) → int - Calculates an appropriate threshold for identifying valleys in a histogram
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computeAdaptiveThreshold(
Uint8List pixels, int width, int height) → int - Computes an adaptive threshold for converting a grayscale image to black and white.
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computeKernelSize(
int width, int height, double scaleFactor) → int - Computes the appropriate kernel size for dilation based on image dimensions.
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copyArtifactGrid(
Artifact source, Artifact target, int offsetX, int offsetY) → void - Copies the contents of a source Matrix into a target Matrix, with an optional offset.
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createImageFromPixels(
Uint8List pixels, int width, int height) → Future< Image> - Creates a new Image from a Uint8List of pixel data.
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dilateArtifact(
{required Artifact matrixImage, required int kernelSize}) → Artifact - Applies dilation morphological operation to a binary image.
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floodFill(
Artifact binaryPixels, Artifact visited, int startX, int startY) → List< Point< int> > - Performs a highly optimized flood fill algorithm on a binary image matrix.
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floodFillToRect(
Artifact binaryPixels, Artifact visited, int startX, int startY) → IntRect - Performs a flood fill algorithm and directly calculates the bounding rectangle without storing all individual points.
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hammingDistancePercentageOfTwoArtifacts(
Artifact inputGrid, Artifact templateGrid) → double - Calculates the normalized Hamming distance between two matrices.
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imageToBlackOnWhite(
Image inputImage, {double contrast = 0}) → Future< Image> - Converts a color image to a binary (black and white) image.
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imageToUint8List(
Image image) → Future< Uint8List> - Converts a Image to a Uint8List representation.
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offsetArtifacts(
List< Artifact> matrices, int x, int y) → void - Applies an offset to the location of a list of matrices.
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splitArtifactByColumns(
Artifact artifactToSplit, List< int> offsets) → List<Artifact> - Splits the given matrix into multiple row matrices based on the provided row offsets.