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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) | |