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| import glob | |
| import rawpy | |
| import cv2 | |
| import os | |
| import numpy as np | |
| import colour_demosaicing | |
| from tqdm import tqdm | |
| def process_raw(args, path, w_new, h_new): | |
| raw = rawpy.imread(str(path)).raw_image_visible | |
| if '_00200_' in str(path) or '_00100_' in str(path): | |
| raw = np.clip(raw.astype('float32') - 512, 0, 65535) | |
| else: | |
| raw = np.clip(raw.astype('float32') - 2048, 0, 65535) | |
| img = colour_demosaicing.demosaicing_CFA_Bayer_bilinear(raw, 'RGGB').astype('float32') | |
| img = np.clip(img, 0, 16383) | |
| # HistEQ start | |
| if args.histeq: | |
| img2 = np.zeros_like(img) | |
| for i in range(3): | |
| hist,bins = np.histogram(img[..., i].flatten(),16384,[0,16384]) | |
| cdf = hist.cumsum() | |
| cdf_normalized = cdf * float(hist.max()) / cdf.max() | |
| cdf_m = np.ma.masked_equal(cdf,0) | |
| cdf_m = (cdf_m - cdf_m.min())*16383/(cdf_m.max()-cdf_m.min()) | |
| cdf = np.ma.filled(cdf_m,0).astype('uint16') | |
| img2[..., i] = cdf[img[..., i].astype('int16')] | |
| img[..., i] = img2[..., i].astype('float32') | |
| # HistEQ end | |
| m = img.mean() | |
| d = np.abs(img - img.mean()).mean() | |
| img = (img - m + 2*d) / 4/d * 255 | |
| image = np.clip(img, 0, 255) | |
| image = cv2.resize(image.astype('float32'), (w_new, h_new), interpolation=cv2.INTER_AREA) | |
| if args.histeq: | |
| path=str(path) | |
| os.makedirs('/'.join(path.split('/')[:-2]+[path.split('/')[-2]+'-npy']), exist_ok=True) | |
| np.save('/'.join(path.split('/')[:-2]+[path.split('/')[-2]+'-npy']+[path.split('/')[-1].replace('cr2','npy')]), image) | |
| else: | |
| path=str(path) | |
| os.makedirs('/'.join(path.split('/')[:-2]+[path.split('/')[-2]+'-npy-nohisteq']), exist_ok=True) | |
| np.save('/'.join(path.split('/')[:-2]+[path.split('/')[-2]+'-npy-nohisteq']+[path.split('/')[-1].replace('cr2','npy')]), image) | |
| if __name__ == '__main__': | |
| import argparse | |
| parser = argparse.ArgumentParser() | |
| parser.add_argument('--H', type=int, default=int(640)) | |
| parser.add_argument('--W', type=int, default=int(960)) | |
| parser.add_argument('--histeq', action='store_true') | |
| parser.add_argument('--dataset_dir', type=str, default='/data/hyz/MID/') | |
| args = parser.parse_args() | |
| path_ls = glob.glob(args.dataset_dir + '/*/pair*/?????/*') | |
| for path in tqdm(path_ls): | |
| process_raw(args, path, args.W, args.H) | |