DeepCreamPy/decensor.py

import numpy as np
from PIL import Image
import os

from copy import deepcopy

import config
from libs.pconv_hybrid_model import PConvUnet
from libs.flood_fill import find_regions, expand_bounding

class Decensor:

    def __init__(self):
        self.args = config.get_args()
        self.is_mosaic = self.args.is_mosaic

        self.mask_color = [self.args.mask_color_red/255.0, self.args.mask_color_green/255.0, self.args.mask_color_blue/255.0]

        if not os.path.exists(self.args.decensor_output_path):
            os.makedirs(self.args.decensor_output_path)

        self.load_model()

    def get_mask(self, colored, width, height):
        mask = np.ones(colored.shape, np.uint8)
        #count = 0
        #TODO: change to iterate over all images in batch when implementing batches
        for row in range(height):
            for col in range(width):
                if np.array_equal(colored[0][row][col], self.mask_color):
                    mask[0, row, col] = 0
        return mask

    def load_model(self):
        self.model = PConvUnet(weight_filepath='data/logs/')
        self.model.load(
            r"./models/model.h5",
            train_bn=False,
            lr=0.00005
        )

    def decensor_all_images_in_folder(self):
        #load model once at beginning and reuse same model
        #self.load_model()
        color_dir = self.args.decensor_input_path
        file_names = os.listdir(color_dir)

        #convert all images into np arrays and put them in a list
        for file_name in file_names:
            color_file_path = os.path.join(color_dir, file_name)
            color_bn, color_ext = os.path.splitext(file_name)
            if os.path.isfile(color_file_path) and color_ext.casefold() == ".png":
                print("--------------------------------------------------------------------------")
                print("Decensoring the image {}".format(color_file_path))
                colored_img = Image.open(color_file_path)
                #if we are doing a mosaic decensor
                if self.is_mosaic:
                    #get the original file that hasn't been colored
                    ori_dir = self.args.decensor_input_original_path
                    #since the original image might not be a png, test multiple file formats
                    valid_formats = {".png", ".jpg", ".jpeg"}
                    for test_file_name in os.listdir(ori_dir):
                        test_bn, test_ext = os.path.splitext(test_file_name)
                        if (test_bn == color_bn) and (test_ext.casefold() in valid_formats):
                            ori_file_path = os.path.join(ori_dir, test_file_name)
                            ori_img = Image.open(ori_file_path)
                            self.decensor_image(ori_img, colored_img, file_name)
                            break
                    else: #for...else, i.e if the loop finished without encountering break
                        print("Corresponding original, uncolored image not found in {}.".format(ori_file_path))
                        print("Check if it exists and is in the PNG or JPG format.")
                else:
                    self.decensor_image(colored_img, colored_img, file_name)
        print("--------------------------------------------------------------------------")

    #decensors one image at a time
    #TODO: decensor all cropped parts of the same image in a batch (then i need input for colored an array of those images and make additional changes)
    def decensor_image(self, ori, colored, file_name):
        width, height = ori.size
        #save the alpha channel if the image has an alpha channel
        has_alpha = False
        if (ori.mode == "RGBA"):
            has_alpha = True
            alpha_channel = np.asarray(ori)[:,:,3]
            alpha_channel = np.expand_dims(alpha_channel, axis =-1)
            ori = ori.convert('RGB')

        ori_array = np.asarray(ori)
        ori_array = np.array(ori_array / 255.0)
        ori_array = np.expand_dims(ori_array, axis = 0)

        if self.is_mosaic:
            #if mosaic decensor, mask is empty
            mask = np.ones(ori_array.shape, np.uint8)
        else:
            mask = self.get_mask(ori_array, width, height) 

        #colored image is only used for finding the regions
        regions = find_regions(colored.convert('RGB'))
        print("Found {region_count} censored regions in this image!".format(region_count = len(regions)))

        if len(regions) == 0 and not self.is_mosaic:
            print("No green regions detected!")
            return

        output_img_array = ori_array[0].copy()

        for region_counter, region in enumerate(regions, 1):
            bounding_box = expand_bounding(ori, region)
            crop_img = ori.crop(bounding_box)
            # crop_img.show()
            #convert mask back to image
            mask_reshaped = mask[0,:,:,:] * 255.0
            mask_img = Image.fromarray(mask_reshaped.astype('uint8'))
            #resize the cropped images
            crop_img = crop_img.resize((512, 512))
            crop_img_array = np.asarray(crop_img)
            crop_img_array = crop_img_array / 255.0
            crop_img_array = np.expand_dims(crop_img_array, axis = 0)
            #resize the mask images
            mask_img = mask_img.crop(bounding_box)
            mask_img = mask_img.resize((512, 512))
            # mask_img.show()
            #convert mask_img back to array 
            mask_array = np.asarray(mask_img)
            mask_array = np.array(mask_array / 255.0)
            #the mask has been upscaled so there will be values not equal to 0 or 1
            #mask_array[mask_array < 0.01] = 0
            mask_array[mask_array > 0] = 1
            mask_array = np.expand_dims(mask_array, axis = 0)

            # Run predictions for this batch of images
            pred_img_array = self.model.predict([crop_img_array, mask_array, mask_array])
            
            pred_img_array = pred_img_array * 255.0
            pred_img_array = np.squeeze(pred_img_array, axis = 0)

            #scale prediction image back to original size
            bounding_width = bounding_box[2]-bounding_box[0]
            bounding_height = bounding_box[3]-bounding_box[1]
            #convert np array to image

            # print(bounding_width,bounding_height)
            # print(pred_img_array.shape)

            pred_img = Image.fromarray(pred_img_array.astype('uint8'))
            # pred_img.show()
            pred_img = pred_img.resize((bounding_width, bounding_height), resample = Image.BICUBIC)
            pred_img_array = np.asarray(pred_img)
            pred_img_array = pred_img_array / 255.0

            # print(pred_img_array.shape)
            pred_img_array = np.expand_dims(pred_img_array, axis = 0)

            for i in range(len(ori_array)):
                for col in range(bounding_width):
                    for row in range(bounding_height):
                        bounding_width_index = col + bounding_box[0]
                        bounding_height_index = row + bounding_box[1]
                        if (bounding_width_index, bounding_height_index) in region:
                            output_img_array[bounding_height_index][bounding_width_index] = pred_img_array[i,:,:,:][row][col]
            print("{region_counter} out of {region_count} regions decensored.".format(region_counter=region_counter, region_count=len(regions)))

        output_img_array = output_img_array * 255.0

        #restore the alpha channel
        if has_alpha:
            #print(output_img_array.shape)
            #print(alpha_channel.shape)
            output_img_array = np.concatenate((output_img_array, alpha_channel), axis = 2)

        output_img = Image.fromarray(output_img_array.astype('uint8'))

        #save the decensored image
        #file_name, _ = os.path.splitext(file_name)
        save_path = os.path.join(self.args.decensor_output_path, file_name)
        output_img.save(save_path)

        print("Decensored image saved to {save_path}!".format(save_path=save_path))
        return

if __name__ == '__main__':
    decensor = Decensor()
    decensor.decensor_all_images_in_folder()