app.py

import gdown
import gradio as gr

import logging
import os

import cv2
import numpy as np
import tensorflow as tf

from ai.detection import detect
from laeo_per_frame.interaction_per_frame_uncertainty import LAEO_computation
from utils.hpe import hpe, project_ypr_in2d
from utils.img_util import resize_preserving_ar, percentage_to_pixel, draw_key_points_pose, \
    visualize_vector


def load_image(camera, ):
    # Capture the video frame by frame
    try:
        ret, frame = camera.read()
        return True, frame
    except:
        logging.Logger('Error reading frame')
        return False, None


def demo_play(img, laeo=True, rgb=False, show_keypoints=True, only_face=False):
    # webcam in use

    # gpus = tf.config.list_physical_devices('GPU')

    # img = np.array(frame)
    if not rgb:
        img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
        img = cv2.cvtColor(img, cv2.COLOR_GRAY2RGB)

    img_resized, new_old_shape = resize_preserving_ar(img, input_shape_od_model)

    print('inference centernet')
    detections, elapsed_time = detect(model, img_resized, min_score_thresh,
                                      new_old_shape)  # detection classes boxes scores
    # probably to draw on resized
    # img_with_detections = draw_detections(img_resized, detections, max_boxes_to_draw, None, None, None)
    # cv2.imshow("aa", img_with_detections)

    det, kpt = percentage_to_pixel(img.shape, detections['detection_boxes'], detections['detection_scores'],
                                   detections['detection_keypoints'], detections['detection_keypoint_scores'])

    # center_xy, yaw, pitch, roll = head_pose_estimation(kpt, 'centernet', gaze_model=gaze_model)

    # _________ extract hpe and print to img
    people_list = []

    print('inferece hpe')

    for j, kpt_person in enumerate(kpt):
        yaw, pitch, roll, tdx, tdy = hpe(gaze_model, kpt_person, detector='centernet')

        # img = draw_axis_3d(yaw[0].numpy()[0], pitch[0].numpy()[0], roll[0].numpy()[0], image=img, tdx=tdx, tdy=tdy,
        #                    size=50)

        people_list.append({'yaw'      : yaw[0].numpy()[0],
                            'yaw_u'    : 0,
                            'pitch'    : pitch[0].numpy()[0],
                            'pitch_u'  : 0,
                            'roll'     : roll[0].numpy()[0],
                            'roll_u'   : 0,
                            'center_xy': [tdx, tdy]
                            })

    if show_keypoints:
        for i in range(len(det)):
            img = draw_key_points_pose(img, kpt[i], only_face=only_face)

    # call LAEO
    clip_uncertainty = 0.5
    binarize_uncertainty = False
    if laeo:
        interaction_matrix = LAEO_computation(people_list, clipping_value=clip_uncertainty,
                                              clip=binarize_uncertainty)
    else:
        interaction_matrix = np.zeros((len(people_list), len(people_list)))
    # coloured arrow print per person

    for index, person in enumerate(people_list):
        green = round((max(interaction_matrix[index, :])) * 255)
        colour = (0, green, 0)
        if green < 40:
            colour = (255, 0, 0)
        vector = project_ypr_in2d(person['yaw'], person['pitch'], person['roll'])
        img = visualize_vector(img, person['center_xy'], vector, title="",
                               color=colour)
    return img


if __name__=='__main__':
    if not os.path.exists("LAEO_demo_data"):
        gdown.download_folder("https://drive.google.com/drive/folders/1nQ1Cb_tBEhWxy183t-mIcVH7AhAfa6NO?usp=drive_link",
                              use_cookies=False)

    # Get the list of all files and directories
    path = "LAEO_demo_data/examples"
    dir_list = os.listdir(path)
    print("Files and directories in '", path, "' :")

    # prints all files
    print(dir_list)

    gaze_model_path = 'LAEO_demo_data/head_pose_estimation'
    gaze_model = tf.keras.models.load_model(gaze_model_path, custom_objects={"tf": tf})
    path_to_model = 'LAEO_demo_data/keypoint_detector/centernet_hg104_512x512_kpts_coco17_tpu-32'
    model = tf.saved_model.load(os.path.join(path_to_model, 'saved_model'))

    input_shape_od_model = (512, 512)
    # params
    min_score_thresh, max_boxes_to_draw, min_distance = .45, 50, 1.5

    print("Num GPUs Available: ", len(tf.config.list_physical_devices('GPU')))

    function_to_call = demo_play
    # outputs = gr.Image(shape=(512, 512))
    live = True
    title = "Head Pose Estimation and LAEO"

    demo_webcam = gr.Interface(
            fn=function_to_call,
            inputs=[gr.Image(source="webcam"),  # with no streaming-> acquire images
                    gr.Checkbox(value=True, label="LAEO", info="Compute and display LAEO"),
                    gr.Checkbox(value=False, label="rgb", info="Display output on W/B image"),
                    gr.Checkbox(value=True, label="show_keypoints", info="Display keypoints on image"),
                    gr.Checkbox(value=True, label="show_keypoints_only_face",
                                info="Display only face keypoints on image"),
                    ],
            outputs="image",
            live=live,
            title=title,
            description="This is a demo developed by Federico Figari T. at MaLGa Lab, University of Genoa, Italy. You can choose to have only the Head Pose Estimation or also the LAEO computation (more than 1 person should be in the image). You need to take a picture and the algorithm will calculate the Head Pose and will be showed as an arrow on your face. LAEO, instead is showed colouring the arrow in green.",
            )

    demo_upload = gr.Interface(
            fn=function_to_call,
            inputs=[gr.Image(source="upload", ),  # with no streaming-> acquire images
                    gr.Checkbox(value=True, label="LAEO", info="Compute and display LAEO"),
                    gr.Checkbox(value=False, label="rgb", info="Display output on W/B image"),
                    gr.Checkbox(value=True, label="show_keypoints", info="Display keypoints on image"),
                    gr.Checkbox(value=True, label="show_keypoints_only_face",
                                info="Display only face keypoints on image"),
                    ],
            outputs=gr.Image(height=238, width=585),  # shape=gr.Image(source="upload", ).shape
            live=live,
            title=title,
            description="This is a demo developed by Federico Figari T. at MaLGa Lab, University of Genoa, Italy. You can choose to have only the Head Pose Estimation or also the LAEO computation (more than 1 person should be in the image). You need to upload an image and the algorithm will calculate the Head Pose and will be showed as an arrow on your face. LAEO, instead is showed colouring the arrow in green.",
            examples=[["LAEO_demo_data/examples/1.jpg"], ["LAEO_demo_data/examples/20.jpg"]]
            )

    demo_tabbed = gr.TabbedInterface([demo_webcam, demo_upload], ["Demo from webcam", "Demo from upload"])

    demo_tabbed.launch()