collect_imgs.py

import os

import cv2


DATA_DIR = './data'
if not os.path.exists(DATA_DIR):
    os.makedirs(DATA_DIR)

number_of_classes = 26
dataset_size = 100

cap = cv2.VideoCapture(0)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 320)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 320)
labels_dict = {0: 'HUNGRY', 1: 'NO', 2: 'DRINK'}

for j in range(3):
    if not os.path.exists(os.path.join(DATA_DIR, str(j))):
        os.makedirs(os.path.join(DATA_DIR, str(j)))

    print('Collecting data for class {}'.format(j))

    done = False
    while True:
        ret, frame = cap.read()
        cv2.putText(frame, 'Class {}, START'.format(labels_dict[j]), (100, 50), cv2.FONT_HERSHEY_SIMPLEX, 1.3, (0, 255, 0), 3,
                    cv2.LINE_AA)
        cv2.imshow('frame', frame)
        if cv2.waitKey(25) == ord(' '):
            for k in range(5):
                cv2.imshow('frame', frame)
                cv2.putText(frame, 'CAPTURING IN {}'.format(5 - k), (100, 50), cv2.FONT_HERSHEY_SIMPLEX, 1.3, (0, 255, 0), 3,
                            cv2.LINE_AA)
                cv2.imshow('frame', frame)
                cv2.waitKey(1000)
            break

    counter = 0
    while counter < dataset_size:
        ret, frame = cap.read()
        cv2.imshow('frame', frame)
        cv2.waitKey(50)
        cv2.imwrite(os.path.join(DATA_DIR, str(j), '{}.jpg'.format(counter)), frame)

        counter += 1


    while True:
        ret, frame = cap.read()
        cv2.putText(frame, 'Class {}, END'.format(labels_dict[j]), (100, 50), cv2.FONT_HERSHEY_SIMPLEX, 1.3, (0, 255, 0), 3,
                    cv2.LINE_AA)
        cv2.imshow('frame', frame)
        if cv2.waitKey(25) == ord(' '):
            for k in range(5):
                cv2.imshow('frame', frame)
                cv2.putText(frame, 'CAPTURING IN {}'.format(5 - k), (100, 50), cv2.FONT_HERSHEY_SIMPLEX, 1.3, (0, 255, 0), 3,
                            cv2.LINE_AA)
                cv2.imshow('frame', frame)
                cv2.waitKey(1000)
            break

    while counter - 100 < dataset_size:
        ret, frame = cap.read()
        cv2.imshow('frame', frame)
        cv2.waitKey(50)
        cv2.imwrite(os.path.join(DATA_DIR, str(j), '{}.jpg'.format(counter)), frame)

        counter += 1

cap.release()
cv2.destroyAllWindows()