check_valid_image.py

# iterate files over subdirectories in `00_store`, store image files in hash table, delete files with same hash
import os
import hashlib
import imghdr

deleted = 0


def is_image(filename, verbose=False):

    data = open(filename, "rb").read(10)

    # check if file is JPG or JPEG
    if data[:3] == b"\xff\xd8\xff":
        if verbose == True:
            print(filename + " is: JPG/JPEG.")
        return True

    # check if file is PNG
    if data[:8] == b"\x89\x50\x4e\x47\x0d\x0a\x1a\x0a":
        if verbose == True:
            print(filename + " is: PNG.")
        return True

    # check if file is GIF
    if data[:6] in [b"\x47\x49\x46\x38\x37\x61", b"\x47\x49\x46\x38\x39\x61"]:
        if verbose == True:
            print(filename + " is: GIF.")
        return True

    return False


def action(in_path):
    for root, _, files in os.walk(in_path):
        for file in files:
            file_path = os.path.join(root, file)
            # print(file_path)

            with open(file_path, "rb") as f:
                if is_image(file_path):
                    # it's a jpeg
                    pass
                else:
                    # print(file_path, "is not valid jpeg")
                    os.remove(file_path)


CURR_DIR = os.path.dirname(os.path.abspath(__file__))
action(CURR_DIR + "/data/train")
action(CURR_DIR + "/data/validate")