face_recognition/fr_flask.py

from PIL import ImageFile
from flask import Flask, request, jsonify
import face_recognition
import base64
from io import BytesIO
import joblib
import numpy as np
import re
import os
import time

ImageFile.SAFEBLOCK = 2048 * 2048

app = Flask(__name__)
model_file_name = "saved_model_2.pkl"
clf = None
classes = None
dummy_data = [
    {
        "name": "Bayu",
        "address": "299 St Louis Road Oak Forest, IL 60452",
        "nik": "1000076456784631"
    },
    {
        "name": "Dio",
        "address": "22 Whitemarsh St. Mansfield, MA 02048",
        "nik": "1000024792887549"
    },
    {
        "name": "Hadi",
        "address": "643 Honey Creek Dr. Milledgeville, GA 31061",
        "nik": "1000038502830420"
    },
    {
        "name": "Kevin",
        "address": "881 Cooper Ave. Hummelstown, PA 17036",
        "nik": "1000045356476664"
    },
    {
        "name": "Matrix",
        "address": "580 Glenwood Dr. Garner, NC 27529",
        "nik": "1000023452134598"
    },
    {
        "name": "Surya",
        "address": "909 South St Paul Street Hopewell, VA 23860",
        "nik": "1000075656784734"
    },
]
ssl = None
known_people_folder = "application_data/verification_images"
face_encodings = []
total_threshold = 0.2


def scan_known_people(known_people_folder):
    known_names = []
    known_face_encodings = []

    for file in image_files_in_folder(known_people_folder):
        img = face_recognition.load_image_file(file)
        encodings = face_recognition.face_encodings(img)

        if len(encodings) > 1:
            print("WARNING: More than one face found in {}. Only considering the first face.".format(file))

        if len(encodings) == 0:
            print("WARNING: No faces found in {}. Ignoring file.".format(file))
        else:
            known_face_encodings.append(encodings[0])

    return known_face_encodings


def image_files_in_folder(folder):
    img_list = [os.path.join(folder, f) for f in os.listdir(folder) if
                re.match(r'.*\.(jpg|jpeg|png|webp)', f, flags=re.I)]
    img_list.sort()
    return img_list


@app.route('/predict', methods=['POST'])
def predict():
    result = []
    if "image" in request.json:
        im_b64 = request.json["image"]
    elif "image" in request.files:
        im_b64 = request.files["image"]
    elif "image" in request.form:
        im_b64 = request.form["image"]
    else:
        return {"error": "Error reading image"}
    im_bytes = base64.b64decode(im_b64)
    im_file = BytesIO(im_bytes)
    test_image = face_recognition.load_image_file(im_file)
    face_locations = face_recognition.face_locations(test_image)
    no = len(face_locations)
    if no > 0:
        for i in range(no):
            start_time = time.perf_counter()
            test_image_enc = face_recognition.face_encodings(test_image)[i]
            proba_list = clf.predict_proba([test_image_enc])
            dist = face_recognition.face_distance(face_encodings, test_image_enc)
            total = np.subtract(proba_list, dist)
            i = np.argmax(total)
            proba = list(*proba_list)[i]
            name = dummy_data[i]["name"]
            address = dummy_data[i]["address"]
            nik = dummy_data[i]["nik"]
            js = {
                "id": str(i),
                "name": name,
                "address": address,
                "nik": nik,
                "proba": proba
            }
            if total[0][i] > total_threshold:
                result.append(js)
            end_time = time.perf_counter()
            process_time = end_time - start_time
            print(total[0])
            print("Process time:", process_time, "s")
    print(result)
    return jsonify(result)


if __name__ == '__main__':
    try:
        clf = joblib.load(model_file_name)
        classes = clf.classes_
        print('model loaded')
        face_encodings = scan_known_people(known_people_folder)
        print('known faces scanned')

    except FileNotFoundError as e:
        print('No model here')
        exit(1)

    app.run(host='0.0.0.0', port=8349, debug=True, ssl_context=ssl)