3 files changed, 104 insertions, 1 deletions
diff --git a/src/argaze.test/GazeAnalysis/ExploitExploreRatio.py b/src/argaze.test/GazeAnalysis/ExploitExploreRatio.py
new file mode 100644
index 0000000..febfec7
--- /dev/null
+++ b/src/argaze.test/GazeAnalysis/ExploitExploreRatio.py
@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+
+""" """
+
+__author__ = "Théo de la Hogue"
+__credits__ = []
+__copyright__ = "Copyright 2023, Ecole Nationale de l'Aviation Civile (ENAC)"
+__license__ = "BSD"
+
+import unittest
+
+from argaze import GazeFeatures
+from argaze.GazeAnalysis import ExploitExploreRatio
+from argaze.utils import MiscFeatures
+
+GazeFeaturesTest = MiscFeatures.importFromTestPackage('GazeFeatures')
+
+class TestScanPathAnalyzer(unittest.TestCase):
+    """Test ScanPathAnalyzer class."""
+
+    def test_analyze(self):
+        """Test analyze method."""
+
+        xxr_analyzer = ExploitExploreRatio.ScanPathAnalyzer()
+        
+        scan_path = GazeFeaturesTest.build_scan_path(10)
+
+        # Check scan path
+        self.assertEqual(len(scan_path), 10)
+
+        xxr = xxr_analyzer.analyze(scan_path)
+
+        print(xxr)
+
+        # Check exploit explore ratio
+        self.assertGreaterEqual(xxr, 0)
+
+if __name__ == '__main__':
+
+    unittest.main()
+\ No newline at end of file
diff --git a/src/argaze/GazeAnalysis/ExploitExploreRatio.py b/src/argaze/GazeAnalysis/ExploitExploreRatio.py
new file mode 100644
index 0000000..eba8ec2
--- /dev/null
+++ b/src/argaze/GazeAnalysis/ExploitExploreRatio.py
@@ -0,0 +1,63 @@
+#!/usr/bin/env python
+
+"""Implementation of exploit vs explore ratio algorithm as described in:
+
+    **Goldberg J. H., Kotval X. P. (1999).**  
+    *Computer interface evaluation using eye movements: methods and constructs.*   
+    International Journal of Industrial Ergonomics (631–645).  
+    [https://doi.org/10.1016/S0169-8141(98)00068-7](https://doi.org/10.1016/S0169-8141\\(98\\)00068-7)  
+        
+    **Dehais F., Peysakhovich V., Scannella S., Fongue J., Gateau T. (2015).**  
+    *Automation surprise in aviation: Real-time solutions.*  
+    Proceedings of the 33rd annual ACM conference on Human Factors in Computing Systems (2525–2534).  
+    [https://doi.org/10.1145/2702123.2702521](https://doi.org/10.1145/2702123.2702521)
+"""
+
+__author__ = "Théo de la Hogue"
+__credits__ = []
+__copyright__ = "Copyright 2023, Ecole Nationale de l'Aviation Civile (ENAC)"
+__license__ = "BSD"
+
+from dataclasses import dataclass
+
+from argaze import GazeFeatures
+
+import numpy
+
+@dataclass
+class ScanPathAnalyzer(GazeFeatures.ScanPathAnalyzer):
+    
+    def __post_init__(self):
+
+        pass
+
+    def analyze(self, scan_path: GazeFeatures.ScanPathType, long_fixation_duration_threshold: float = 0.) -> float:
+        """Analyze scan path."""
+
+        assert(len(scan_path) > 1)
+
+        short_fixations_durations = []
+        long_fixations_durations = []
+        saccades_durations = []
+
+        for scan_step in scan_path:
+
+            if scan_step.first_fixation.duration > long_fixation_duration_threshold:
+
+                long_fixations_durations.append(scan_step.first_fixation.duration)
+
+            else:
+
+                short_fixations_durations.append(scan_step.first_fixation.duration)
+
+            saccades_durations.append(scan_step.last_saccade.duration)
+
+        short_fixations_duration = numpy.array(short_fixations_durations).sum()
+        long_fixations_duration = numpy.array(long_fixations_durations).sum()
+        saccades_duration = numpy.array(saccades_durations).sum()
+
+        print(short_fixations_duration, long_fixations_duration, saccades_duration)
+
+        assert(saccades_duration + short_fixations_duration > 0)
+
+        return long_fixations_duration / (saccades_duration + short_fixations_duration)
diff --git a/src/argaze/GazeAnalysis/__init__.py b/src/argaze/GazeAnalysis/__init__.py
index 21753c1..5f8b102 100644
--- a/src/argaze/GazeAnalysis/__init__.py
+++ b/src/argaze/GazeAnalysis/__init__.py
@@ -2,4 +2,4 @@
 .. include:: README.md
 """
 __docformat__ = "restructuredtext"
-__all__ = ['DispersionThresholdIdentification', 'VelocityThresholdIdentification', 'TransitionMatrix', 'KCoefficient', 'LempelZivComplexity', 'NGram', 'Entropy', 'NearestNeighborIndex']
-\ No newline at end of file
+__all__ = ['DispersionThresholdIdentification', 'VelocityThresholdIdentification', 'TransitionMatrix', 'KCoefficient', 'LempelZivComplexity', 'NGram', 'Entropy', 'NearestNeighborIndex', 'ExploitExploreRatio']
+\ No newline at end of file