black_horizontal_run_histogram

IntVector black_horizontal_run_histogram ()

Returns the histogram of the length of black horizontal runs.

return_value

The return value is an integer array, of length == image.ncols. Each index in the array corresponds to a particular run length, and the value at that index is the number of times that that run length occurs in the image.

black_vertical_run_histogram

IntVector black_vertical_run_histogram ()

Returns the histogram of the length of black vertical runs.

return_value

The return value is an integer array, of length == image.ncols. Each index in the array corresponds to a particular run length, and the value at that index is the number of times that that run length occurs in the image.

filter_narrow_black_runs

filter_narrow_black_runs (int size)

Removes black horizontal runs narrower than a given length.

filter_narrow_white_runs

filter_narrow_white_runs (int size)

Removes white horizontal runs narrower than a given length.

filter_short_black_runs

filter_short_black_runs (int size)

Removes black vertical runs shorter than a given length.

filter_short_white_runs

filter_short_white_runs (int size)

Removes white vertical runs shorter than a given length.

filter_tall_black_runs

filter_tall_black_runs (int size)

Removes black vertical runs taller than a given length.

filter_tall_white_runs

filter_tall_white_runs (int size)

Removes white vertical runs taller than a given length.

filter_wide_black_runs

filter_wide_black_runs (int size)

Removes black horizontal runs wider than a given length.

filter_wide_white_runs

filter_wide_white_runs (int size)

Removes white horizontal runs wider than a given length.

iterate_black_horizontal_runs

object iterate_black_horizontal_runs ()

Returns nested iterators over the black horizontal runs in the image.

Each run is returned as a Rect object.

For example, to iterate over all runs:

iterate_black_vertical_runs

object iterate_black_vertical_runs ()

Returns nested iterators over the black vertical runs in the image.

Each run is returned as a Rect object.

See iterate_black_horizontal_runs for a usage example.

iterate_white_horizontal_runs

object iterate_white_horizontal_runs ()

Returns nested iterators over the white horizontal runs in the image.

Each run is returned as a Rect object.

See iterate_black_horizontal_runs for a usage example.

iterate_white_vertical_runs

object iterate_white_vertical_runs ()

Returns nested iterators over the white vertical runs in the image.

Each run is returned as a Rect object.

See iterate_black_horizontal_runs for a usage example.

most_frequent_black_horizontal_run

int most_frequent_black_horizontal_run ()

Returns the length of the most frequently occurring horizontal run of black pixels.

most_frequent_black_horizontal_runs

object most_frequent_black_horizontal_runs (int n = -1)

Returns the lengths of the n most frequently occurring horizontal runs of black pixels.

n

The number of runlengths to return. If n < 0, all runlengths will be returned.

The return value is a list of 2-tuples. The first element in the tuple is the run length, and the second element is its frequency. The list is sorted by descending frequency.

most_frequent_black_vertical_run

int most_frequent_black_vertical_run ()

Returns the length of the most frequently occurring vertical run of black pixels.

most_frequent_black_vertical_runs

object most_frequent_black_vertical_runs (int n = -1)

Returns the lengths of the n most frequently occurring vertical runs of black pixels.

n

The number of runlengths to return. If n < 0, all runlengths will be returned.

The return value is a list of 2-tuples. The first element in the tuple is the run length, and the second element is its frequency. The list is sorted by descending frequency.

most_frequent_white_horizontal_run

int most_frequent_white_horizontal_run ()

Returns the length of the most frequently occurring horizontal run of white pixels.

most_frequent_white_horizontal_runs

object most_frequent_white_horizontal_runs (int n = -1)

Returns the lengths of the n most frequently occurring horizontal runs of white pixels.

n

The number of runlengths to return. If n < 0, all runlengths will be returned.

The return value is a list of 2-tuples. The first element in the tuple is the run length, and the second element is its frequency. The list is sorted by descending frequency.

most_frequent_white_vertical_run

int most_frequent_white_vertical_run ()

Returns the length of the most frequently occurring vertical run of white pixels.

most_frequent_white_vertical_runs

object most_frequent_white_vertical_runs (int n = -1)

Returns the lengths of the n most frequently occurring vertical runs of white pixels.

n

The number of runlengths to return. If n < 0, all runlengths will be returned.

The return value is a list of 2-tuples. The first element in the tuple is the run length, and the second element is its frequency. The list is sorted by descending frequency.

white_horizontal_run_histogram

IntVector white_horizontal_run_histogram ()

Returns the histogram of the length of white horizontal runs.

return_value

The return value is an integer array, of length == image.ncols. Each index in the array corresponds to a particular run length, and the value at that index is the number of times that that run length occurs in the image.

white_vertical_run_histogram

IntVector white_vertical_run_histogram ()

Returns the histogram of the length of white vertical runs.

return_value

The return value is an integer array, of length == image.ncols. Each index in the array corresponds to a particular run length, and the value at that index is the number of times that that run length occurs in the image.