demo.py

import face_recognition
import cv2
import numpy as np

import imageSegmentation

from mediapipe.tasks.python import vision
import Visualization_utilities as vis

# Get a reference to webcam #0 (the default one)
# video_capture = cv2.VideoCapture(0)

# Load a sample picture and learn how to recognize it.

def get_face_encoding(path):
    print(f'path: {path}')
    print('hello')
    HKID_cropped = imageSegmentation.auto_cropping(path)
    cv2.imwrite('saved/HKID.jpg', HKID_cropped)
    HKID_image = face_recognition.load_image_file("saved/HKID.jpg")
    HKID_face_encoding = face_recognition.face_encodings(HKID_image)[0]
    return HKID_face_encoding

# HKID_image = face_recognition.load_image_file("saved/HKID.jpg")
# HKID_face_encoding = face_recognition.face_encodings(HKID_image)[0]

# Create arrays of known face encodings and their names
# known_face_encodings = [
#     HKID_face_encoding
# ]
# known_face_names = [
#     "Marco"
# ]

# Initialize some variables
# face_locations = []
# face_encodings = []
# face_names = []
# process_this_frame = True

# score = []

# faces = 0 # number of faces

# while True:
#     # Grab a single frame of video
#     ret, frame = video_capture.read()

    

#         # # Draw a label with a name below the face
#         # cv2.rectangle(frame, (left, bottom - 35), (right, bottom), (0, 0, 255), cv2.FILLED)
#         # font = cv2.FONT_HERSHEY_DUPLEX
#         # cv2.putText(frame, name, (left + 6, bottom - 6), font, 1.0, (255, 255, 255), 1)

#     # Display the resulting image
#     cv2.imshow('Video', frame)

#     # Hit 'q' on the keyboard to quit!
#     if cv2.waitKey(1) & 0xFF == ord('q'):
#         break


def process_frame(frame, process_this_frame, face_locations, faces, face_names, score):

    hkid_face_encoding = get_face_encoding("image")

    print(f'encoding: {hkid_face_encoding}')

    known_face_encodings = [
        hkid_face_encoding
    ]

    known_face_names = [
        "recognized"
    ]

    # Only process every other frame of video to save time
    if process_this_frame:
        face_names = []
        # Resize frame of video to 1/4 size for faster face recognition processing
        small_frame = cv2.resize(frame, (0, 0), fx=0.25, fy=0.25)

        # Convert the image from BGR color (which OpenCV uses) to RGB color (which face_recognition uses)
        rgb_small_frame = cv2.cvtColor(small_frame, cv2.COLOR_BGR2RGB)
        
        # Find all the faces and face encodings in the current frame of video
        face_locations = face_recognition.face_locations(rgb_small_frame)
        face_encodings = face_recognition.face_encodings(rgb_small_frame, face_locations)
        faces = len(face_encodings) # number of faces

        for face_encoding in face_encodings:
            # See if the face is a match for the known face(s)
            matches = face_recognition.compare_faces(known_face_encodings, face_encoding)
            name = "Unknown"

            # # If a match was found in known_face_encodings, just use the first one.
            # if True in matches:
            #     first_match_index = matches.index(True)
            #     name = known_face_names[first_match_index]

            # Or instead, use the known face with the smallest distance to the new face
            face_distances = face_recognition.face_distance(known_face_encodings, face_encoding)
            best_match_index = np.argmin(face_distances)
            print(face_distances)
            if matches[best_match_index] and face_distances[best_match_index] < 0.45:
                score.append(face_distances[best_match_index])
                name = known_face_names[best_match_index]
            else:
                score = []

            face_names.append(name)

    # if len(score) > 20:
    #     avg_score =  sum(score) / len(score)

    # Display the results
    if faces > 1 :
        # Define the text and font properties
        text = "More than 1 person detected!"
        font = cv2.FONT_HERSHEY_DUPLEX
        font_scale = 1
        font_thickness = 2

        # Calculate the text size
        window_height = frame.shape[0]
        window_width = frame.shape[1]
        text_size, _ = cv2.getTextSize(text, font, font_scale, font_thickness)

        # Calculate the text position
        text_x = int((window_width - text_size[0]) / 2)
        text_y = window_height - int(text_size[1] / 2)

        cv2.putText(frame, text, (text_x, text_y), font, font_scale, (255, 255, 255), font_thickness, cv2.LINE_AA)
        
    for (top, right, bottom, left), name in zip(face_locations, face_names):
        # Scale back up face locations since the frame we detected in was scaled to 1/4 size
        top *= 4
        right *= 4
        bottom *= 4
        left *= 4

        # Draw a box around the face
        cv2.rectangle(frame, (left, top), (right, bottom), (65, 181, 41), 4)

        # Define the name box properties
        name_box_color = (44, 254, 0)
        name_box_alpha = 0.7
        name_box_thickness = -1

        # Define the text properties
        font = cv2.FONT_HERSHEY_TRIPLEX
        font_scale = 1
        font_thickness = 2
        text_color = (255, 255, 255)

        # Calculate the text size
        text_width, text_height = cv2.getTextSize(name, font, font_scale, font_thickness)[0]

        # Draw the name box
        cv2.rectangle(frame, (left, bottom - 35), (right, bottom),
                    name_box_color, name_box_thickness)
        cv2.rectangle(frame, (left, bottom - 35), (right, bottom),
                    name_box_color, cv2.FILLED)

        # Draw the name text
        cv2.putText(frame, name, (left + 70, bottom - 6), font, font_scale, text_color, font_thickness)

    process_this_frame = process_this_frame

    frame = cv2.cvtColor(frame, cv2.COLOR_RGB2BGR)

    return frame, process_this_frame, face_locations, faces, face_names, score

def convert_distance_to_percentage(distance, threshold):
    if distance < threshold:
        score = 80
        score += distance / 0.45 * 20
    else:
        score = (1 - distance) * 100
    return score

# percent = convert_distance_to_percentage(avg_score, 0.45)

# print(f'avg_score = {percent:.2f}% : Approved!')

# # Release handle to the webcam
# video_capture.release()
# cv2.destroyAllWindows()