Post processing pipeline ======================== The pipeline processes camera image and gaze data to enable gaze mapping and gaze analysis. ## post_processing_pipeline.json For this use case we need to detect ArUco markers to enable gaze mapping: **ArGaze** provides the [ArUcoCamera](../../argaze.md/#argaze.ArUcoMarker.ArUcoCamera) class to setup an [ArUco markers pipeline](../../user_guide/aruco_marker_pipeline/introduction.md). ```json { "argaze.ArUcoMarker.ArUcoCamera.ArUcoCamera": { "name": "ATC_Study", "size": [1920, 1080], "sides_mask": 420, "copy_background_into_scenes_frames": true, "aruco_detector": { "dictionary": "DICT_APRILTAG_16h5", "optic_parameters": "optic_parameters.json", "parameters": { "adaptiveThreshConstant": 20, "useAruco3Detection": 1 } }, "gaze_movement_identifier": { "argaze.GazeAnalysis.DispersionThresholdIdentification.GazeMovementIdentifier": { "deviation_max_threshold": 25, "duration_min_threshold": 150 } }, "layers": { "Main" : { "aoi_matcher": { "argaze.GazeAnalysis.DeviationCircleCoverage.AOIMatcher": { "coverage_threshold": 0.5 } }, "aoi_scan_path" : { "duration_max": 60000 }, "aoi_scan_path_analyzers": { "argaze.GazeAnalysis.Basic.AOIScanPathAnalyzer": {}, "argaze.GazeAnalysis.TransitionMatrix.AOIScanPathAnalyzer": {}, "argaze.GazeAnalysis.NGram.AOIScanPathAnalyzer": { "n_min": 3, "n_max": 5 }, "argaze.GazeAnalysis.Entropy.AOIScanPathAnalyzer": {} }, "observers": { "observers.AOIScanPathAnalysisRecorder": { "path": "aoi_metrics.csv" } } } }, "image_parameters": { "background_weight": 1, "draw_gaze_positions": { "color": [0, 255, 255], "size": 4 }, "draw_detected_markers": { "color": [0, 255, 0] }, "draw_layers": { "Main": { "draw_aoi_scene": { "draw_aoi": { "color": [255, 255, 255], "border_size": 1 } }, "draw_aoi_matching": { "update_looked_aoi": true, "draw_looked_aoi": { "color": [0, 255, 0], "border_size": 2 }, "looked_aoi_name_color": [255, 255, 255], "looked_aoi_name_offset": [0, -10] } } } }, "scenes": { "Workspace": { "aruco_markers_group": "workspace_markers.obj", "layers": { "Main" : { "aoi_scene": "workspace_aois.obj" } }, "frames": { "Sector_Screen": { "size": [1080, 1017], "gaze_movement_identifier": { "argaze.GazeAnalysis.DispersionThresholdIdentification.GazeMovementIdentifier": { "deviation_max_threshold": 25, "duration_min_threshold": 150 } }, "scan_path": { "duration_max": 30000 }, "scan_path_analyzers": { "argaze.GazeAnalysis.Basic.ScanPathAnalyzer": {}, "argaze.GazeAnalysis.ExploreExploitRatio.ScanPathAnalyzer": { "short_fixation_duration_threshold": 0 }, "argaze.GazeAnalysis.KCoefficient.ScanPathAnalyzer": {} }, "layers" :{ "Main": { "aoi_scene": "sector_screen_aois.svg" } }, "heatmap": { "size": [80, 60] }, "image_parameters": { "background_weight": 1, "heatmap_weight": 0.5, "draw_gaze_positions": { "color": [0, 127, 127], "size": 4 }, "draw_scan_path": { "draw_fixations": { "deviation_circle_color": [255, 255, 255], "duration_border_color": [0, 127, 127], "duration_factor": 1e-2 }, "draw_saccades": { "line_color": [0, 255, 255] }, "deepness": 0 }, "draw_layers": { "Main": { "draw_aoi_scene": { "draw_aoi": { "color": [255, 255, 255], "border_size": 1 } }, "draw_aoi_matching": { "draw_matched_fixation": { "deviation_circle_color": [255, 255, 255], "draw_positions": { "position_color": [0, 255, 0], "line_color": [0, 0, 0] } }, "draw_looked_aoi": { "color": [0, 255, 0], "border_size": 2 }, "looked_aoi_name_color": [255, 255, 255], "looked_aoi_name_offset": [10, 10] } } } }, "observers": { "observers.ScanPathAnalysisRecorder": { "path": "sector_screen.csv" }, "observers.VideoRecorder": { "path": "sector_screen.mp4", "width": 1080, "height": 1024, "fps": 25 } } }, "Info_Screen": { "size": [640, 1080], "layers" : { "Main": { "aoi_scene": "info_screen_aois.svg" } } } }, "angle_tolerance": 15.0, "distance_tolerance": 2.54 } }, "observers": { "argaze.utils.UtilsFeatures.LookPerformanceRecorder": { "path": "_export/look_performance.csv" }, "argaze.utils.UtilsFeatures.WatchPerformanceRecorder": { "path": "_export/watch_performance.csv" } } } } ``` All the files mentioned aboved are described below. The *ScanPathAnalysisRecorder* and *AOIScanPathAnalysisRecorder* observers objects are defined into the [observers.py](observers.md) file that is described in the next chapter. ## optic_parameters.json This file defines the Tobii Pro glasses 2 scene camera optic parameters which has been calculated as explained into [the camera calibration chapter](../../user_guide/aruco_marker_pipeline/advanced_topics/optic_parameters_calibration.md). ```json { "rms": 0.6688921504088245, "dimensions": [ 1920, 1080 ], "K": [ [ 1135.6524381415752, 0.0, 956.0685325355497 ], [ 0.0, 1135.9272506869524, 560.059099810324 ], [ 0.0, 0.0, 1.0 ] ], "D": [ 0.01655492265003404, 0.1985524264972037, 0.002129965902489484, -0.0019528582922179365, -0.5792910353639452 ] } ``` ## workspace_markers.obj This file defines the place where are the ArUco markers into the workspace geometry. Markers' positions have been edited in Blender software from a 3D model of the workspace built manually then exported at OBJ format. ```obj # Blender v3.0.1 OBJ File: 'workspace.blend' # www.blender.org o DICT_APRILTAG_16h5#1_Marker v -2.532475 48.421242 0.081627 v 2.467094 48.355682 0.077174 v 2.532476 53.352734 -0.081634 v -2.467093 53.418293 -0.077182 s off f 1 2 3 4 o DICT_APRILTAG_16h5#6_Marker v 88.144676 23.084166 -0.070246 v 93.144661 23.094980 -0.072225 v 93.133904 28.092941 0.070232 v 88.133919 28.082127 0.072211 s off f 5 6 7 8 o DICT_APRILTAG_16h5#2_Marker v -6.234516 27.087950 0.176944 v -1.244015 27.005413 -0.119848 v -1.164732 32.004459 -0.176936 v -6.155232 32.086998 0.119855 s off f 9 10 11 12 o DICT_APRILTAG_16h5#3_Marker v -2.518053 -2.481743 -0.018721 v 2.481756 -2.518108 0.005601 v 2.518059 2.481743 0.018721 v -2.481749 2.518108 -0.005601 s off f 13 14 15 16 o DICT_APRILTAG_16h5#5_Marker v 48.746418 48.319012 -0.015691 v 53.746052 48.374046 0.009490 v 53.690983 53.373741 0.015698 v 48.691349 53.318699 -0.009490 s off f 17 18 19 20 o DICT_APRILTAG_16h5#4_Marker v 23.331947 -3.018721 5.481743 v 28.331757 -2.994399 5.518108 v 28.368059 -2.981279 0.518257 v 23.368252 -3.005600 0.481892 s off f 21 22 23 24 ``` ## workspace_aois.obj This file defines the place of the AOI into the workspace geometry. AOI positions have been edited in [Blender software](https://www.blender.org/) from a 3D model of the workspace built manually then exported at OBJ format. ```obj # Blender v3.0.1 OBJ File: 'workspace.blend' # www.blender.org o Sector_Screen v 0.000000 1.008786 0.000000 v 51.742416 1.008786 0.000000 v 0.000000 52.998108 0.000000 v 51.742416 52.998108 0.000000 s off f 1 2 4 3 o Info_Screen v 56.407101 0.000000 0.000000 v 91.407104 0.000000 0.000000 v 56.407101 52.499996 0.000000 v 91.407104 52.499996 0.000000 s off f 5 6 8 7 ``` ## sector_screen_aois.svg This file defines the place of the AOI into the sector screen frame. AOI positions have been edited [Inkscape software](https://inkscape.org/fr/) from a screenshot of the sector screen then exported at SVG format. ```svg ``` ## info_screen_aois.svg This file defines the place of the AOI into the info screen frame. AOI positions have been edited [Inkscape software](https://inkscape.org/fr/) from a screenshot of the info screen then exported at SVG format. ```svg ``` ## aoi_metrics.csv The file contains all the metrics recorded by the *AOIScanPathAnalysisRecorder* objects as defined into the [observers.py](observers.md) file. ## sector_screen.csv The file contains all the metrics recorded by the *ScanPathAnalysisRecorder* objects as defined into the [observers.py](observers.md) file. ## sector_screen.mp4 The video file is a record of the sector screen frame image. ## look_performance.csv This file contains the logs of *ArUcoCamera.look* method execution info. It is created into an *_export* folder from where the [*load* command](../../user_guide/utils/main_commands.md) is launched. On a MacBookPro (2,3GHz Intel Core i9 8 cores), the *look* method execution time is ~7ms and it is called ~115 times per second. ## watch_performance.csv This file contains the logs of *ArUcoCamera.watch* method execution info. It file is created into an *_export* folder from where the [*load* command](../../user_guide/utils/main_commands.md) is launched. On a MacBookPro (2,3GHz Intel Core i9 8 cores), the *watch* method execution time is ~60ms and it is called ~10 times per second.