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Configuration error
Configuration error
| import numpy as np | |
| from PIL import Image | |
| import cv2 | |
| import thinplate as tps | |
| cv2.setNumThreads(0) | |
| def pick_random_points(h, w, n_samples): | |
| y_idx = np.random.choice(np.arange(h), size=n_samples, replace=False) | |
| x_idx = np.random.choice(np.arange(w), size=n_samples, replace=False) | |
| return y_idx/h, x_idx/w | |
| def warp_dual_cv(img, mask, c_src, c_dst): | |
| dshape = img.shape | |
| theta = tps.tps_theta_from_points(c_src, c_dst, reduced=True) | |
| grid = tps.tps_grid(theta, c_dst, dshape) | |
| mapx, mapy = tps.tps_grid_to_remap(grid, img.shape) | |
| return cv2.remap(img, mapx, mapy, cv2.INTER_LINEAR), cv2.remap(mask, mapx, mapy, cv2.INTER_NEAREST) | |
| def random_tps_warp(img, mask, scale, n_ctrl_pts=12): | |
| """ | |
| Apply a random TPS warp of the input image and mask | |
| Uses randomness from numpy | |
| """ | |
| img = np.asarray(img) | |
| mask = np.asarray(mask) | |
| h, w = mask.shape | |
| points = pick_random_points(h, w, n_ctrl_pts) | |
| c_src = np.stack(points, 1) | |
| c_dst = c_src + np.random.normal(scale=scale, size=c_src.shape) | |
| warp_im, warp_gt = warp_dual_cv(img, mask, c_src, c_dst) | |
| return Image.fromarray(warp_im), Image.fromarray(warp_gt) | |