handwriting_features.features.implementation.conventional package

Subpackages

• handwriting_features.features.implementation.conventional.utils package
  • Submodules
  • handwriting_features.features.implementation.conventional.utils.composite module
    • WritingNumberOfChangesUtils
      • WritingNumberOfChangesUtils.fc
      • WritingNumberOfChangesUtils.get_number_of_changes_in_azimuth()
      • WritingNumberOfChangesUtils.get_number_of_changes_in_pressure()
      • WritingNumberOfChangesUtils.get_number_of_changes_in_tilt()
      • WritingNumberOfChangesUtils.get_number_of_changes_in_velocity_profile()
      • WritingNumberOfChangesUtils.get_number_of_changes_in_x_profile()
      • WritingNumberOfChangesUtils.get_number_of_changes_in_y_profile()
      • WritingNumberOfChangesUtils.get_relative_number_of_changes_in_azimuth()
      • WritingNumberOfChangesUtils.get_relative_number_of_changes_in_pressure()
      • WritingNumberOfChangesUtils.get_relative_number_of_changes_in_tilt()
      • WritingNumberOfChangesUtils.get_relative_number_of_changes_in_velocity_profile()
      • WritingNumberOfChangesUtils.get_relative_number_of_changes_in_x_profile()
      • WritingNumberOfChangesUtils.get_relative_number_of_changes_in_y_profile()
      • WritingNumberOfChangesUtils.n
    • WritingStopsUtils
      • WritingStopsUtils.get_writing_stops()
    • WritingTempoUtils
      • WritingTempoUtils.get_writing_tempo()
  • handwriting_features.features.implementation.conventional.utils.dynamic module
  • handwriting_features.features.implementation.conventional.utils.kinematic module
  • handwriting_features.features.implementation.conventional.utils.spatial module
    • IntersectionUtils
      • IntersectionUtils.get_number_of_inter_stroke_intersections()
      • IntersectionUtils.get_number_of_intra_stroke_intersections()
      • IntersectionUtils.get_relative_number_of_inter_stroke_intersections()
      • IntersectionUtils.get_relative_number_of_intra_stroke_intersections()
      • IntersectionUtils.get_relative_total_number_of_intra_stroke_intersections()
      • IntersectionUtils.get_total_number_of_intra_stroke_intersections()
    • ProjectionUtils
      • ProjectionUtils.n
      • ProjectionUtils.vertical_peaks_distance()
      • ProjectionUtils.vertical_peaks_duration()
      • ProjectionUtils.vertical_peaks_indices()
      • ProjectionUtils.vertical_peaks_values()
      • ProjectionUtils.vertical_peaks_velocity()
      • ProjectionUtils.vertical_valleys_distance()
      • ProjectionUtils.vertical_valleys_duration()
      • ProjectionUtils.vertical_valleys_indices()
      • ProjectionUtils.vertical_valleys_values()
      • ProjectionUtils.vertical_valleys_velocity()
  • handwriting_features.features.implementation.conventional.utils.temporal module
  • Module contents

Submodules

handwriting_features.features.implementation.conventional.composite module

handwriting_features.features.implementation.conventional.composite.number_of_changes_in_azimuth(sample_wrapper, fs, fc=None, n=None)

Returns number of changes in azimuth.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

number of changes in azimuth

Return type:

int

handwriting_features.features.implementation.conventional.composite.number_of_changes_in_pressure(sample_wrapper, fs, fc=None, n=None)

Returns number of changes in pressure.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

number of changes in pressure

Return type:

int

handwriting_features.features.implementation.conventional.composite.number_of_changes_in_tilt(sample_wrapper, fs, fc=None, n=None)

Returns number of changes in tilt.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

number of changes in tilt

Return type:

int

handwriting_features.features.implementation.conventional.composite.number_of_changes_in_velocity_profile(sample_wrapper, fs, fc=None, n=None)

Returns number of changes in velocity profile.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

number of changes in velocity profile

Return type:

int

handwriting_features.features.implementation.conventional.composite.number_of_changes_in_x_profile(sample_wrapper, fs, fc=None, n=None)

Returns number of changes in x profile.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

number of changes in x profile

Return type:

int

handwriting_features.features.implementation.conventional.composite.number_of_changes_in_y_profile(sample_wrapper, fs, fc=None, n=None)

Returns number of changes in y profile.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

number of changes in y profile

Return type:

int

handwriting_features.features.implementation.conventional.composite.relative_number_of_changes_in_azimuth(sample_wrapper, fs, fc=None, n=None)

Returns relative number of changes in azimuth.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

relative number of changes in azimuth

Return type:

int

handwriting_features.features.implementation.conventional.composite.relative_number_of_changes_in_pressure(sample_wrapper, fs, fc=None, n=None)

Returns relative number of changes in pressure.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

relative number of changes in pressure

Return type:

int

handwriting_features.features.implementation.conventional.composite.relative_number_of_changes_in_tilt(sample_wrapper, fs, fc=None, n=None)

Returns relative number of changes in tilt.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

relative number of changes in tilt

Return type:

int

handwriting_features.features.implementation.conventional.composite.relative_number_of_changes_in_velocity_profile(sample_wrapper, fs, fc=None, n=None)

Returns relative number of changes in velocity profile.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

relative number of changes in velocity profile

Return type:

int

handwriting_features.features.implementation.conventional.composite.relative_number_of_changes_in_x_profile(sample_wrapper, fs, fc=None, n=None)

Returns relative number of changes in x profile.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

relative number of changes in x profile

Return type:

int

handwriting_features.features.implementation.conventional.composite.relative_number_of_changes_in_y_profile(sample_wrapper, fs, fc=None, n=None)

Returns relative number of changes in y profile.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• fc (float, optional) – cutoff frequency for the low-pass filter, defaults to None

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

relative number of changes in y profile

Return type:

int

handwriting_features.features.implementation.conventional.composite.writing_stops(sample_wrapper)

Returns writing stops.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

writing stops

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.composite.writing_tempo(sample_wrapper, in_air)

Returns writing tempo.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• in_air (bool) – in-air flag

Returns:

writing tempo

Return type:

float

handwriting_features.features.implementation.conventional.dynamic module

handwriting_features.features.implementation.conventional.dynamic.azimuth(sample_wrapper, in_air)

Returns azimuth.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• in_air (bool) – in-air flag

Returns:

azimuth

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.dynamic.pressure(sample_wrapper)

Returns pressure.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

pressure

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.dynamic.tilt(sample_wrapper, in_air)

Returns tilt.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• in_air (bool) – in-air flag

Returns:

tilt

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.kinematic module

handwriting_features.features.implementation.conventional.kinematic.acceleration(sample_wrapper, axis, in_air)

Returns acceleration.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• axis (str) – axis to compute the acceleration from

• in_air (bool) – in-air flag

Returns:

acceleration

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.kinematic.jerk(sample_wrapper, axis, in_air)

Returns jerk.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• axis (str) – axis to compute the jerk from

• in_air (bool) – in-air flag

Returns:

jerk

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.kinematic.velocity(sample_wrapper, axis, in_air)

Returns velocity.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• axis (str) – axis to compute the velocity from

• in_air (bool) – in-air flag

Returns:

velocity

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial module

handwriting_features.features.implementation.conventional.spatial.number_of_inter_stroke_intersections(sample_wrapper)

Returns number of inter-stroke intersections.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

number of inter-stroke intersections

Return type:

int

handwriting_features.features.implementation.conventional.spatial.number_of_intra_stroke_intersections(sample_wrapper)

Returns number of intra-stroke intersections.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

number of intra-stroke intersections

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial.relative_number_of_inter_stroke_intersections(sample_wrapper)

Returns relative number of inter-stroke intersections.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

relative number of inter-stroke intersections

Return type:

float

handwriting_features.features.implementation.conventional.spatial.relative_number_of_intra_stroke_intersections(sample_wrapper)

Returns relative number of intra-stroke intersections.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

relative number of intra-stroke intersections

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial.relative_total_number_of_intra_stroke_intersections(sample_wrapper)

Returns relative total number of intra-stroke intersections.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

relative total number of intra-stroke intersections

Return type:

float

handwriting_features.features.implementation.conventional.spatial.stroke_height(sample_wrapper, in_air)

Returns stroke height.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• in_air (bool) – in-air flag

Returns:

stroke height

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial.stroke_length(sample_wrapper, in_air)

Returns stroke length.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• in_air (bool) – in-air flag

Returns:

stroke length

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial.stroke_width(sample_wrapper, in_air)

Returns stroke width.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• in_air (bool) – in-air flag

Returns:

stroke width

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial.total_number_of_intra_stroke_intersections(sample_wrapper)

Returns total number of intra-stroke intersections.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

total number of intra-stroke intersections

Return type:

int

handwriting_features.features.implementation.conventional.spatial.vertical_peaks_distance(sample_wrapper, fs, n=None)

Returns vertical peaks distance.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

vertical peaks distance

Return type:

int

handwriting_features.features.implementation.conventional.spatial.vertical_peaks_duration(sample_wrapper, fs, n=None)

Returns vertical peaks duration.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

vertical peaks duration

Return type:

handwriting_features.features.implementation.conventional.spatial.vertical_peaks_indices(sample_wrapper, fs, n=None)

Returns vertical peaks indices.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

vertical peaks indices

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial.vertical_peaks_values(sample_wrapper, fs, n=None)

Returns vertical peaks values.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

vertical peaks values

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial.vertical_peaks_velocity(sample_wrapper, fs, n=None)

Returns vertical peaks velocity.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

vertical peaks velocity

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial.vertical_valleys_distance(sample_wrapper, fs, n=None)

Returns vertical valleys distance.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

vertical valleys distance

Return type:

int

handwriting_features.features.implementation.conventional.spatial.vertical_valleys_duration(sample_wrapper, fs, n=None)

Returns vertical valleys duration.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

vertical valleys duration

Return type:

handwriting_features.features.implementation.conventional.spatial.vertical_valleys_indices(sample_wrapper, fs, n=None)

Returns vertical valleys indices.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

vertical valleys indices

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial.vertical_valleys_values(sample_wrapper, fs, n=None)

Returns vertical valleys values.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

vertical valleys values

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial.vertical_valleys_velocity(sample_wrapper, fs, n=None)

Returns vertical valleys velocity.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• fs (float) – sampling frequency

• n (int, optional) – number of samples of a Gaussian filter, defaults to None

Returns:

vertical valleys velocity

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.spatial.writing_height(sample_wrapper, in_air)

Returns writing height.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• in_air (bool) – in-air flag

Returns:

writing height

Return type:

float

handwriting_features.features.implementation.conventional.spatial.writing_length(sample_wrapper, in_air)

Returns writing length.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• in_air (bool) – in-air flag

Returns:

writing length

Return type:

float

handwriting_features.features.implementation.conventional.spatial.writing_width(sample_wrapper, in_air)

Returns writing width.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• in_air (bool) – in-air flag

Returns:

writing width

Return type:

float

handwriting_features.features.implementation.conventional.temporal module

handwriting_features.features.implementation.conventional.temporal.number_of_interruptions(sample_wrapper)

Returns the number of interruptions.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

number of interruptions

Return type:

float

handwriting_features.features.implementation.conventional.temporal.number_of_interruptions_relative(sample_wrapper)

Returns the number of interruptions relative to the duration.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

number of interruptions relative to the duration

Return type:

float

handwriting_features.features.implementation.conventional.temporal.ratio_of_stroke_durations(sample_wrapper)

Returns ratio of stroke durations: on-surface / in-air.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

ratio of stroke durations

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.temporal.ratio_of_writing_durations(sample_wrapper)

Returns ratio of writing durations: on-surface / in-air.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

ratio of writing durations

Return type:

float

handwriting_features.features.implementation.conventional.temporal.stroke_duration(sample_wrapper, in_air)

Returns stroke duration.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• in_air (bool) – in-air flag

Returns:

stroke duration

Return type:

numpy.ndarray or np.NaN

handwriting_features.features.implementation.conventional.temporal.writing_duration(sample_wrapper, in_air)

Returns writing duration.

Parameters:

• sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

• in_air (bool) – in-air flag

Returns:

writing duration

Return type:

float

handwriting_features.features.implementation.conventional.temporal.writing_duration_overall(sample_wrapper)

Returns overall writing duration.

Parameters:

sample_wrapper (HandwritingSampleWrapper) – sample wrapper object

Returns:

overall writing duration

Return type:

float

Module contents