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#!/usr/bin/env python
""" """
__author__ = "Théo de la Hogue"
__credits__ = []
__copyright__ = "Copyright 2023, Ecole Nationale de l'Aviation Civile (ENAC)"
__license__ = "BSD"
import unittest
import random
import time
import math
from argaze import GazeFeatures
from argaze.GazeAnalysis import VelocityThresholdIdentification
import numpy
def build_gaze_fixation(size: int, start_position: tuple, deviation_max: float, min_time: float, max_time: float, start_ts: float = 0., validity: list = []):
""" Generate N TimeStampedGazePositions strating from a starting position for testing purpose.
Timestamps are current time after random sleep (second).
GazePositions are random values.
"""
ts_gaze_positions = GazeFeatures.TimeStampedGazePositions()
start_time = time.time()
last_valid_position = start_position
for i in range(0, size):
# Check position validity
valid = True
if len(validity) > i:
valid = validity[i]
if valid:
# Edit gaze position
random_x = last_valid_position[0] + deviation_max * (random.random() - 0.5)
random_y = last_valid_position[1] + deviation_max * (random.random() - 0.5)
gaze_position = GazeFeatures.GazePosition((random_x, random_y))
# Remember last valid gaze position
last_valid_position = gaze_position.value
else:
gaze_position = GazeFeatures.UnvalidGazePosition()
# Store gaze position
ts = time.time() - start_time + start_ts
ts_gaze_positions[ts] = gaze_position
# Sleep a random time
sleep_time = random.random() * (max_time - min_time) + min_time
time.sleep(sleep_time)
return ts_gaze_positions
def build_gaze_saccade(size: int, center_A: tuple, center_B: tuple, min_time: float, max_time: float, start_ts: float = 0., validity: list = []):
""" Generate N TimeStampedGazePsoitions between 2 center points for testing purpose.
Timestamps are current time after random sleep (second).
GazePositions are random values.
"""
ts_gaze_positions = GazeFeatures.TimeStampedGazePositions()
start_time = time.time()
for i in range(0, size):
# Check position validity
valid = True
if len(validity) > i:
valid = validity[i]
if valid:
# Edit gaze position
move_x = center_A[0] + (center_B[0] - center_A[0]) * (i / size)
move_y = center_A[1] + (center_B[1] - center_A[1]) * (i / size)
gaze_position = GazeFeatures.GazePosition((move_x, move_y))
else:
gaze_position = GazeFeatures.UnvalidGazePosition()
# Store gaze position
ts = time.time() - start_time + start_ts
ts_gaze_positions[ts] = gaze_position
# Sleep a random time
sleep_time = random.random() * (max_time - min_time) + min_time
time.sleep(sleep_time)
return ts_gaze_positions
class TestVelocityThresholdIdentificationClass(unittest.TestCase):
"""Test VelocityThresholdIdentification class."""
def test_fixation_identification(self):
"""Test VelocityThresholdIdentification fixation identification."""
size = 10
center = (0, 0)
deviation_max = 10
min_time = 0.05
max_time = 0.1
velocity_max = math.sqrt(2) * deviation_max / min_time
ts_gaze_positions = build_gaze_fixation(size, center, deviation_max, min_time, max_time)
gaze_movement_identifier = VelocityThresholdIdentification.GazeMovementIdentifier(velocity_max_threshold=velocity_max, duration_min_threshold=max_time*2)
ts_fixations, ts_saccades, ts_status = gaze_movement_identifier.browse(ts_gaze_positions)
# Check result size
self.assertEqual(len(ts_fixations), 1)
self.assertEqual(len(ts_saccades), 0)
self.assertEqual(len(ts_status), size-1)
# Check fixation
ts, fixation = ts_fixations.pop_first()
self.assertEqual(len(fixation.positions.keys()), size-1)
self.assertGreaterEqual(fixation.duration, size * min_time)
self.assertLessEqual(fixation.duration, size * max_time)
self.assertLessEqual(fixation.finished, True)
def test_fixation_and_direct_saccade_identification(self):
"""Test VelocityThresholdIdentification fixation and saccade identification."""
size = 10
center_A = (0, 0)
center_B = (500, 500)
deviation_max = 10
min_time = 0.05
max_time = 0.1
velocity_max = math.sqrt(2) * deviation_max / min_time
ts_gaze_positions_A = build_gaze_fixation(size, center_A, deviation_max, min_time, max_time)
ts_gaze_positions_B = build_gaze_fixation(size, center_B, deviation_max, min_time, max_time, start_ts=ts_gaze_positions_A.last[0])
ts_gaze_positions = ts_gaze_positions_A.append(ts_gaze_positions_B)
gaze_movement_identifier = VelocityThresholdIdentification.GazeMovementIdentifier(velocity_max_threshold=velocity_max, duration_min_threshold=max_time*2)
ts_fixations, ts_saccades, ts_status = gaze_movement_identifier.browse(ts_gaze_positions)
# Check result size
self.assertEqual(len(ts_fixations), 2)
self.assertEqual(len(ts_saccades), 1)
self.assertEqual(len(ts_status), size*2 - 1)
# Check first fixation
ts, fixation = ts_fixations.pop_first()
self.assertEqual(len(fixation.positions.keys()), size-1)
self.assertGreaterEqual(fixation.duration, size * min_time)
self.assertLessEqual(fixation.duration, size * max_time)
self.assertLessEqual(fixation.finished, True)
# Check first saccade
ts, saccade = ts_saccades.pop_first()
self.assertEqual(len(saccade.positions.keys()), 1)
self.assertGreaterEqual(saccade.duration, 0.)
self.assertLessEqual(saccade.duration, 0.)
self.assertLessEqual(saccade.finished, True)
# Check second fixation
ts, fixation = ts_fixations.pop_first()
self.assertEqual(len(fixation.positions.keys()), size-1)
self.assertGreaterEqual(fixation.duration, size * min_time)
self.assertLessEqual(fixation.duration, size * max_time)
self.assertLessEqual(fixation.finished, True)
def test_fixation_and_short_saccade_identification(self):
"""Test VelocityThresholdIdentification fixation and saccade identification."""
size = 10
move = 2
center_A = (0, 0)
out_A = (10, 10)
center_B = (50, 50)
deviation_max = 10
min_time = 0.05
max_time = 0.1
velocity_max = math.sqrt(2) * deviation_max / min_time
ts_gaze_positions_A = build_gaze_fixation(size, center_A, deviation_max, min_time, max_time)
ts_move_positions = build_gaze_saccade(move, out_A, center_B, min_time, min_time, start_ts=ts_gaze_positions_A.last[0])
ts_gaze_positions_B = build_gaze_fixation(size, center_B, deviation_max, min_time, max_time, start_ts=ts_move_positions.last[0])
ts_gaze_positions = ts_gaze_positions_A.append(ts_move_positions).append(ts_gaze_positions_B)
gaze_movement_identifier = VelocityThresholdIdentification.GazeMovementIdentifier(velocity_max_threshold=velocity_max, duration_min_threshold=max_time*2)
ts_fixations, ts_saccades, ts_status = gaze_movement_identifier.browse(ts_gaze_positions)
# Check result size
self.assertEqual(len(ts_fixations), 2)
self.assertEqual(len(ts_saccades), 1)
self.assertEqual(len(ts_status), 2 * size - 1 + move)
# Check first fixation
ts, fixation = ts_fixations.pop_first()
self.assertEqual(len(fixation.positions.keys()), size-1)
self.assertGreaterEqual(fixation.duration, size * min_time)
self.assertLessEqual(fixation.duration, size * max_time)
self.assertLessEqual(fixation.finished, True)
# Check first saccade
ts, saccade = ts_saccades.pop_first()
self.assertEqual(len(saccade.positions.keys()), move+1)
self.assertGreaterEqual(saccade.duration, min_time)
self.assertLessEqual(saccade.duration, max_time)
self.assertLessEqual(saccade.finished, True)
# Check second fixation
ts, fixation = ts_fixations.pop_first()
self.assertEqual(len(fixation.positions.keys()), size-1)
self.assertGreaterEqual(fixation.duration, size * min_time)
self.assertLessEqual(fixation.duration, size * max_time)
self.assertLessEqual(fixation.finished, True)
def test_invalid_gaze_position(self):
"""Test VelocityThresholdIdentification fixation and saccade identification with invalid gaze position."""
size = 15
center = (0, 0)
deviation_max = 10
min_time = 0.05
max_time = 0.1
velocity_max = math.sqrt(2) * deviation_max / min_time
validity = [True, True, True, True, True, True, True, False, False, False, True, True, True, True, True]
ts_gaze_positions = build_gaze_fixation(size, center, deviation_max, min_time, max_time, validity=validity)
gaze_movement_identifier = VelocityThresholdIdentification.GazeMovementIdentifier(velocity_max_threshold=velocity_max, duration_min_threshold=max_time*2)
ts_fixations, ts_saccades, ts_status = gaze_movement_identifier.browse(ts_gaze_positions)
# Check result size
self.assertEqual(len(ts_fixations), 2)
self.assertEqual(len(ts_saccades), 0)
self.assertEqual(len(ts_status), len(validity)-5)
# Check first fixation
ts, fixation = ts_fixations.pop_first()
self.assertEqual(len(fixation.positions.keys()), 6)
self.assertGreaterEqual(fixation.duration, 6 * min_time)
self.assertLessEqual(fixation.duration, 6 * max_time)
self.assertLessEqual(fixation.finished, True)
# Check second fixation
ts, fixation = ts_fixations.pop_first()
self.assertEqual(len(fixation.positions.keys()), 4)
self.assertGreaterEqual(fixation.duration, 4 * min_time)
self.assertLessEqual(fixation.duration, 4 * max_time)
self.assertLessEqual(fixation.finished, True)
if __name__ == '__main__':
unittest.main()
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