mirror of
https://github.com/graphdeco-inria/gaussian-splatting
synced 2024-11-24 21:13:46 +00:00
95 lines
3.4 KiB
Python
95 lines
3.4 KiB
Python
import numpy as np
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import argparse
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import cv2
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from joblib import delayed, Parallel
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import json
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from read_write_model import *
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def get_scales(key, cameras, images, points3d_ordered, args):
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image_meta = images[key]
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cam_intrinsic = cameras[image_meta.camera_id]
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pts_idx = images_metas[key].point3D_ids
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mask = pts_idx >= 0
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mask *= pts_idx < len(points3d_ordered)
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pts_idx = pts_idx[mask]
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valid_xys = image_meta.xys[mask]
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if len(pts_idx) > 0:
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pts = points3d_ordered[pts_idx]
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else:
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pts = np.array([0, 0, 0])
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R = qvec2rotmat(image_meta.qvec)
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pts = np.dot(pts, R.T) + image_meta.tvec
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invcolmapdepth = 1. / pts[..., 2]
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n_remove = len(image_meta.name.split('.')[-1]) + 1
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invmonodepthmap = cv2.imread(f"{args.depths_dir}/{image_meta.name[:-n_remove]}.png", cv2.IMREAD_UNCHANGED)
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if invmonodepthmap is None:
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return None
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if invmonodepthmap.ndim != 2:
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invmonodepthmap = invmonodepthmap[..., 0]
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invmonodepthmap = invmonodepthmap.astype(np.float32) / (2**16)
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s = invmonodepthmap.shape[0] / cam_intrinsic.height
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maps = (valid_xys * s).astype(np.float32)
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valid = (
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(maps[..., 0] >= 0) *
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(maps[..., 1] >= 0) *
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(maps[..., 0] < cam_intrinsic.width * s) *
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(maps[..., 1] < cam_intrinsic.height * s) * (invcolmapdepth > 0))
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if valid.sum() > 10 and (invcolmapdepth.max() - invcolmapdepth.min()) > 1e-3:
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maps = maps[valid, :]
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invcolmapdepth = invcolmapdepth[valid]
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invmonodepth = cv2.remap(invmonodepthmap, maps[..., 0], maps[..., 1], interpolation=cv2.INTER_LINEAR, borderMode=cv2.BORDER_REPLICATE)[..., 0]
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## Median / dev
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t_colmap = np.median(invcolmapdepth)
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s_colmap = np.mean(np.abs(invcolmapdepth - t_colmap))
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t_mono = np.median(invmonodepth)
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s_mono = np.mean(np.abs(invmonodepth - t_mono))
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scale = s_colmap / s_mono
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offset = t_colmap - t_mono * scale
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else:
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scale = 0
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offset = 0
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return {"image_name": image_meta.name[:-n_remove], "scale": scale, "offset": offset}
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if __name__ == '__main__':
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parser = argparse.ArgumentParser()
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parser.add_argument('--base_dir', default="../data/big_gaussians/standalone_chunks/campus")
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parser.add_argument('--depths_dir', default="../data/big_gaussians/standalone_chunks/campus/depths_any")
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parser.add_argument('--model_type', default="bin")
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args = parser.parse_args()
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cam_intrinsics, images_metas, points3d = read_model(os.path.join(args.base_dir, "sparse", "0"), ext=f".{args.model_type}")
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pts_indices = np.array([points3d[key].id for key in points3d])
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pts_xyzs = np.array([points3d[key].xyz for key in points3d])
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points3d_ordered = np.zeros([pts_indices.max()+1, 3])
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points3d_ordered[pts_indices] = pts_xyzs
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# depth_param_list = [get_scales(key, cam_intrinsics, images_metas, points3d_ordered, args) for key in images_metas]
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depth_param_list = Parallel(n_jobs=-1, backend="threading")(
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delayed(get_scales)(key, cam_intrinsics, images_metas, points3d_ordered, args) for key in images_metas
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)
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depth_params = {
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depth_param["image_name"]: {"scale": depth_param["scale"], "offset": depth_param["offset"]}
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for depth_param in depth_param_list if depth_param != None
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}
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with open(f"{args.base_dir}/sparse/0/depth_params.json", "w") as f:
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json.dump(depth_params, f, indent=2)
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print(0)
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