Revision 149a4bed439e0865728cd85b9ffc0bef7921f7ee authored by Your Name on 09 August 2021, 09:06:08 UTC, committed by Your Name on 09 August 2021, 09:06:08 UTC
1 parent 12831ad
test_vectorization.py
import numpy as np
import random
import os
import tensorflow as tf
from six.moves import range
from PIL import Image
import time
import argparse
import hyper_parameters as hparams
from model_common_test import DiffPastingV3, VirtualSketchingModel
from utils import reset_graph, load_checkpoint, update_hyperparams, draw, \
save_seq_data, image_pasting_v3_testing, draw_strokes
from dataset_utils import load_dataset_testing
os.environ['CUDA_VISIBLE_DEVICES'] = '0'
def move_cursor_to_undrawn(current_canvas_list, input_image_, last_min_acc_list, grid_patch_size=128,
stroke_acc_threshold=0.95, stroke_num_threshold=5, continuous_min_acc_threshold=2):
"""
:param current_canvas_list: (select_times, image_size, image_size), [0.0-BG, 1.0-stroke]
:param input_image_: (1, image_size, image_size), [0-stroke, 1-BG]
:return: new_cursor_pos: (select_times, 1, 2), [0.0, 1.0)
"""
def split_images(in_img, image_size, grid_size):
if image_size % grid_size == 0:
paddings_ = 0
else:
paddings_ = grid_size - image_size % grid_size
paddings = [[0, paddings_],
[0, paddings_]]
image_pad = np.pad(in_img, paddings, mode='constant', constant_values=0.0) # (H_p, W_p), [0.0-BG, 1.0-stroke]
assert image_pad.shape[0] % grid_size == 0
split_num = image_pad.shape[0] // grid_size
images_h = np.hsplit(image_pad, split_num)
image_patches = []
for image_h in images_h:
images_v = np.vsplit(image_h, split_num)
image_patches += images_v
image_patches = np.array(image_patches, dtype=np.float32)
return image_patches, split_num
def line_drawing_rounding(line_drawing):
line_drawing_r = np.copy(line_drawing) # [0.0-BG, 1.0-stroke]
line_drawing_r[line_drawing_r != 0.0] = 1.0
return line_drawing_r
def cal_undrawn_pixels(in_canvas, in_sketch):
in_canvas_round = line_drawing_rounding(in_canvas).astype(np.int32) # (N, H, W), [0.0-BG, 1.0-stroke]
in_sketch_round = line_drawing_rounding(in_sketch).astype(np.int32)
intersection = np.bitwise_and(in_canvas_round, in_sketch_round)
intersection_sum = np.sum(intersection, axis=(1, 2))
gt_sum = np.sum(in_sketch_round, axis=(1, 2)) # (N)
undrawn_num = gt_sum - intersection_sum
return undrawn_num
def cal_stroke_acc(in_canvas, in_sketch):
in_canvas_round = line_drawing_rounding(in_canvas).astype(np.int32) # (N, H, W), [0.0-BG, 1.0-stroke]
in_sketch_round = line_drawing_rounding(in_sketch).astype(np.int32)
intersection = np.bitwise_and(in_canvas_round, in_sketch_round)
intersection_sum = np.sum(intersection, axis=(1, 2)).astype(np.float32)
gt_sum = np.sum(in_sketch_round, axis=(1, 2)).astype(np.float32) # (N)
undrawn_num = gt_sum - intersection_sum # (N)
stroke_acc = intersection_sum / gt_sum # (N)
stroke_acc[gt_sum == 0.0] = 1.0
stroke_acc[undrawn_num <= stroke_num_threshold] = 1.0
return stroke_acc
def get_cursor(patch_idx, img_size, grid_size, split_num):
y_pos = patch_idx % split_num
x_pos = patch_idx // split_num
y_top = y_pos * grid_size + grid_size // 4
y_bottom = y_top + grid_size // 2
x_left = x_pos * grid_size + grid_size // 4
x_right = x_left + grid_size // 2
cursor_y = random.randint(y_top, y_bottom)
cursor_x = random.randint(x_left, x_right)
cursor_y = max(0, min(cursor_y, img_size - 1))
cursor_x = max(0, min(cursor_x, img_size - 1)) # (2), in large size
center = np.array([cursor_x, cursor_y], dtype=np.float32)
return center / float(img_size) # (2), in size [0.0, 1.0)
input_image = 1.0 - input_image_[0] # (image_size, image_size), [0-BG, 1-stroke]
img_size = input_image.shape[0]
input_image_patches, split_number = split_images(input_image, img_size, grid_patch_size) # (N, grid_size, grid_size)
new_cursor_pos = []
last_min_acc_list_new = [item for item in last_min_acc_list]
for canvas_i in range(current_canvas_list.shape[0]):
curr_canvas = current_canvas_list[canvas_i] # (image_size, image_size), [0.0-BG, 1.0-stroke]
curr_canvas_patches, _ = split_images(curr_canvas, img_size, grid_patch_size) # (N, grid_size, grid_size)
# 1. detect ending flag by stroke accuracy
stroke_accuracy = cal_stroke_acc(curr_canvas_patches, input_image_patches)
min_acc_idx = np.argmin(stroke_accuracy)
min_acc= stroke_accuracy[min_acc_idx]
# print('min_acc_idx', min_acc_idx, ' | ', 'min_acc', min_acc)
if min_acc >= stroke_acc_threshold: # end of drawing
return None, None
# 2. detect undrawn pixels
undrawn_pixel_num = cal_undrawn_pixels(curr_canvas_patches, input_image_patches)
# undrawn_pixel_num_dis = np.reshape(undrawn_pixel_num, (split_number, split_number)).T
# print('undrawn_pixel_num_dis')
# print(undrawn_pixel_num_dis)
max_undrawn_idx = np.argmax(undrawn_pixel_num)
# max_undrawn = undrawn_pixel_num[max_undrawn_idx]
# print('max_undrawn_idx', max_undrawn_idx, ' | ', 'max_undrawn', max_undrawn)
# 3. select a random position
last_min_acc_idx, last_min_acc_times = last_min_acc_list[canvas_i]
if last_min_acc_times >= continuous_min_acc_threshold and last_min_acc_idx == min_acc_idx:
selected_patch_idx = last_min_acc_idx
new_min_acc_times = 1
else:
selected_patch_idx = max_undrawn_idx
if min_acc_idx == last_min_acc_idx:
new_min_acc_times = last_min_acc_times + 1
else:
new_min_acc_times = 1
new_min_acc_idx = min_acc_idx
last_min_acc_list_new[canvas_i] = (new_min_acc_idx, new_min_acc_times)
# print('selected_patch_idx', selected_patch_idx)
# 4. get cursor according to the selected_patch_idx
rand_cursor = get_cursor(selected_patch_idx, img_size, grid_patch_size, split_number) # (2), in size [0.0, 1.0)
new_cursor_pos.append(rand_cursor)
assert len(new_cursor_pos) == current_canvas_list.shape[0]
new_cursor_pos = np.expand_dims(np.stack(new_cursor_pos, axis=0), axis=1) # (select_times, 1, 2), [0.0, 1.0)
return new_cursor_pos, last_min_acc_list_new
def sample(sess, model, input_photos, init_cursor, image_size, init_len, seq_lens, state_dependent,
pasting_func, round_stop_state_num, stroke_acc_threshold):
"""Samples a sequence from a pre-trained model."""
select_times = 1
curr_canvas = np.zeros(dtype=np.float32,
shape=(select_times, image_size, image_size)) # [0.0-BG, 1.0-stroke]
initial_state = sess.run(model.initial_state)
prev_width = np.stack([model.hps.min_width for _ in range(select_times)], axis=0)
params_list = [[] for _ in range(select_times)]
state_raw_list = [[] for _ in range(select_times)]
state_soft_list = [[] for _ in range(select_times)]
window_size_list = [[] for _ in range(select_times)]
last_min_stroke_acc_list = [(-1, 0) for _ in range(select_times)]
round_cursor_list = []
round_length_real_list = []
input_photos_tiles = np.tile(input_photos, (select_times, 1, 1))
for cursor_i, seq_len in enumerate(seq_lens):
# print('\n')
# print('@@ Round', cursor_i + 1)
if cursor_i == 0:
cursor_pos = np.squeeze(init_cursor, axis=0) # (select_times, 1, 2)
else:
cursor_pos, last_min_stroke_acc_list_updated = \
move_cursor_to_undrawn(curr_canvas, input_photos, last_min_stroke_acc_list,
grid_patch_size=model.hps.raster_size,
stroke_acc_threshold=stroke_acc_threshold) # (select_times, 1, 2)
if cursor_pos is not None:
round_cursor_list.append(cursor_pos)
last_min_stroke_acc_list = last_min_stroke_acc_list_updated
else:
break
prev_state = initial_state
if not model.hps.init_cursor_on_undrawn_pixel:
prev_width = np.stack([model.hps.min_width for _ in range(select_times)], axis=0)
prev_scaling = np.ones((select_times), dtype=np.float32) # (N)
prev_window_size = np.ones((select_times), dtype=np.float32) * model.hps.raster_size # (N)
continuous_one_state_num = 0
for i in range(seq_len):
if not state_dependent and i % init_len == 0:
prev_state = initial_state
curr_window_size = prev_scaling * prev_window_size # (N)
curr_window_size = np.maximum(curr_window_size, model.hps.min_window_size)
curr_window_size = np.minimum(curr_window_size, image_size)
feed = {
model.initial_state: prev_state,
model.input_photo: np.expand_dims(input_photos_tiles, axis=-1),
model.curr_canvas_hard: curr_canvas.copy(),
model.cursor_position: cursor_pos,
model.image_size: image_size,
model.init_width: prev_width,
model.init_scaling: prev_scaling,
model.init_window_size: prev_window_size,
}
o_other_params_list, o_pen_list, o_pred_params_list, next_state_list = \
sess.run([model.other_params, model.pen_ras, model.pred_params, model.final_state], feed_dict=feed)
# o_other_params: (N, 6), o_pen: (N, 2), pred_params: (N, 1, 7), next_state: (N, 1024)
# o_other_params: [tanh*2, sigmoid*2, tanh*2, sigmoid*2]
idx_eos_list = np.argmax(o_pen_list, axis=1) # (N)
output_i = 0
idx_eos = idx_eos_list[output_i]
eos = [0, 0]
eos[idx_eos] = 1
other_params = o_other_params_list[output_i].tolist() # (6)
params_list[output_i].append([eos[1]] + other_params)
state_raw_list[output_i].append(o_pen_list[output_i][1])
state_soft_list[output_i].append(o_pred_params_list[output_i, 0, 0])
window_size_list[output_i].append(curr_window_size[output_i])
# draw the stroke and add to the canvas
x1y1, x2y2, width2 = o_other_params_list[output_i, 0:2], o_other_params_list[output_i, 2:4], \
o_other_params_list[output_i, 4]
x0y0 = np.zeros_like(x2y2) # (2), [-1.0, 1.0]
x0y0 = np.divide(np.add(x0y0, 1.0), 2.0) # (2), [0.0, 1.0]
x2y2 = np.divide(np.add(x2y2, 1.0), 2.0) # (2), [0.0, 1.0]
widths = np.stack([prev_width[output_i], width2], axis=0) # (2)
o_other_params_proc = np.concatenate([x0y0, x1y1, x2y2, widths], axis=-1).tolist() # (8)
if idx_eos == 0:
f = o_other_params_proc + [1.0, 1.0]
pred_stroke_img = draw(f) # (raster_size, raster_size), [0.0-stroke, 1.0-BG]
pred_stroke_img_large = image_pasting_v3_testing(1.0 - pred_stroke_img, cursor_pos[output_i, 0],
image_size,
curr_window_size[output_i],
pasting_func, sess) # [0.0-BG, 1.0-stroke]
curr_canvas[output_i] += pred_stroke_img_large # [0.0-BG, 1.0-stroke]
continuous_one_state_num = 0
else:
continuous_one_state_num += 1
curr_canvas = np.clip(curr_canvas, 0.0, 1.0)
next_width = o_other_params_list[:, 4] # (N)
next_scaling = o_other_params_list[:, 5]
next_window_size = next_scaling * curr_window_size # (N)
next_window_size = np.maximum(next_window_size, model.hps.min_window_size)
next_window_size = np.minimum(next_window_size, image_size)
prev_state = next_state_list
prev_width = next_width * curr_window_size / next_window_size # (N,)
prev_scaling = next_scaling # (N)
prev_window_size = curr_window_size
# update cursor_pos based on hps.cursor_type
new_cursor_offsets = o_other_params_list[:, 2:4] * (np.expand_dims(curr_window_size, axis=-1) / 2.0) # (N, 2), patch-level
new_cursor_offset_next = new_cursor_offsets
# important!!!
new_cursor_offset_next = np.concatenate([new_cursor_offset_next[:, 1:2], new_cursor_offset_next[:, 0:1]], axis=-1)
cursor_pos_large = cursor_pos * float(image_size)
stroke_position_next = cursor_pos_large[:, 0, :] + new_cursor_offset_next # (N, 2), large-level
if model.hps.cursor_type == 'next':
cursor_pos_large = stroke_position_next # (N, 2), large-level
else:
raise Exception('Unknown cursor_type')
cursor_pos_large = np.minimum(np.maximum(cursor_pos_large, 0.0), float(image_size - 1)) # (N, 2), large-level
cursor_pos_large = np.expand_dims(cursor_pos_large, axis=1) # (N, 1, 2)
cursor_pos = cursor_pos_large / float(image_size)
if continuous_one_state_num >= round_stop_state_num or i == seq_len - 1:
round_length_real_list.append(i + 1)
break
return params_list, state_raw_list, state_soft_list, curr_canvas, window_size_list, \
round_cursor_list, round_length_real_list
def main_testing(test_image_base_dir, test_dataset, test_image_name,
sampling_base_dir, model_base_dir, model_name,
sampling_num,
longer_infer_lens,
round_stop_state_num, stroke_acc_threshold,
draw_seq=False, draw_order=False,
state_dependent=True):
model_params_default = hparams.get_default_hparams_clean()
model_params = update_hyperparams(model_params_default, model_base_dir, model_name, infer_dataset=test_dataset)
[test_set, eval_hps_model, sample_hps_model] \
= load_dataset_testing(test_image_base_dir, test_dataset, test_image_name, model_params)
test_image_raw_name = test_image_name[:test_image_name.find('.')]
model_dir = os.path.join(model_base_dir, model_name)
reset_graph()
sampling_model = VirtualSketchingModel(sample_hps_model)
# differentiable pasting graph
paste_v3_func = DiffPastingV3(sample_hps_model.raster_size)
tfconfig = tf.ConfigProto()
tfconfig.gpu_options.allow_growth = True
sess = tf.InteractiveSession(config=tfconfig)
sess.run(tf.global_variables_initializer())
# loads the weights from checkpoint into our model
snapshot_step = load_checkpoint(sess, model_dir, gen_model_pretrain=True)
print('snapshot_step', snapshot_step)
sampling_dir = os.path.join(sampling_base_dir, test_dataset + '__' + model_name)
os.makedirs(sampling_dir, exist_ok=True)
stroke_number_list = []
compute_time_list = []
for sampling_i in range(sampling_num):
start_time_point = time.time()
input_photos, init_cursors, test_image_size = test_set.get_test_image()
# input_photos: (1, image_size, image_size), [0-stroke, 1-BG]
# init_cursors: (1, 1, 2), in size [0.0, 1.0)
print()
print(test_image_name, ', image_size:', test_image_size, ', sampling_i:', sampling_i)
print('Processing ...')
if init_cursors.ndim == 3:
init_cursors = np.expand_dims(init_cursors, axis=0)
input_photos = input_photos[0:1, :, :]
ori_img = (input_photos.copy()[0] * 255.0).astype(np.uint8)
ori_img = np.stack([ori_img for _ in range(3)], axis=2)
ori_img_png = Image.fromarray(ori_img, 'RGB')
ori_img_png.save(os.path.join(sampling_dir, test_image_raw_name + '_input.png'), 'PNG')
data_loading_time_point = time.time()
# decoding for sampling
strokes_raw_out_list, states_raw_out_list, states_soft_out_list, pred_imgs_out, \
window_size_out_list, round_new_cursors, round_new_lengths = sample(
sess, sampling_model, input_photos, init_cursors, test_image_size,
eval_hps_model.max_seq_len, longer_infer_lens, state_dependent,
paste_v3_func, round_stop_state_num, stroke_acc_threshold)
# pred_imgs_out: [0.0-BG, 1.0-stroke]
print('## round_lengths:', len(round_new_lengths), ':', round_new_lengths)
sampling_time_point = time.time()
data_loading_time = data_loading_time_point - start_time_point
sampling_time_total = sampling_time_point - start_time_point
sampling_time_wo_data_loading = sampling_time_point - data_loading_time_point
compute_time_list.append(sampling_time_total)
# print(' >>> data_loading_time', data_loading_time)
print(' >>> sampling_time_total', sampling_time_total)
# print(' >>> sampling_time_wo_data_loading', sampling_time_wo_data_loading)
best_result_idx = 0
strokes_raw_out = np.stack(strokes_raw_out_list[best_result_idx], axis=0)
states_raw_out = states_raw_out_list[best_result_idx]
states_soft_out = states_soft_out_list[best_result_idx]
window_size_out = window_size_out_list[best_result_idx]
multi_cursors = [init_cursors[0, best_result_idx, 0]]
for c_i in range(len(round_new_cursors)):
best_cursor = round_new_cursors[c_i][best_result_idx, 0] # (2)
multi_cursors.append(best_cursor)
assert len(multi_cursors) == len(round_new_lengths)
print('strokes_raw_out', strokes_raw_out.shape)
stroke_number_list.append(strokes_raw_out.shape[0])
clean_states_soft_out = np.array(states_soft_out) # (N)
flag_list = strokes_raw_out[:, 0].astype(np.int32) # (N)
drawing_len = len(flag_list) - np.sum(flag_list)
assert drawing_len >= 0
# print(' flag raw\t soft\t x1\t\t y1\t\t x2\t\t y2\t\t r2\t\t s2')
for i in range(strokes_raw_out.shape[0]):
flag, x1, y1, x2, y2, r2, s2 = strokes_raw_out[i]
win_size = window_size_out[i]
out_format = '#%d: %d | %.4f, %.4f, %.4f, %.4f, %.4f, %.4f, %.4f, %.4f'
out_values = (i, flag, states_raw_out[i], clean_states_soft_out[i], x1, y1, x2, y2, r2, s2)
out_log = out_format % out_values
# print(out_log)
print('Saving results ...')
save_seq_data(sampling_dir, test_image_raw_name + '_' + str(sampling_i),
strokes_raw_out, multi_cursors,
test_image_size, round_new_lengths, eval_hps_model.min_width)
draw_strokes(strokes_raw_out, sampling_dir, test_image_raw_name + '_' + str(sampling_i) + '_pred.png',
ori_img, test_image_size,
multi_cursors, round_new_lengths, eval_hps_model.min_width, eval_hps_model.cursor_type,
sample_hps_model.raster_size, sample_hps_model.min_window_size,
sess,
pasting_func=paste_v3_func,
save_seq=draw_seq, draw_order=draw_order)
average_stroke_number = np.mean(stroke_number_list)
average_compute_time = np.mean(compute_time_list)
print()
print('@@@ Total summary:')
print(' >>> average_stroke_number', average_stroke_number)
print(' >>> average_compute_time', average_compute_time)
def main(model_name, test_image_name, sampling_num):
test_dataset = 'clean_line_drawings'
test_image_base_dir = 'sample_inputs'
sampling_base_dir = 'outputs/sampling'
model_base_dir = 'outputs/snapshot'
state_dependent = False
longer_infer_lens = [500 for _ in range(10)]
round_stop_state_num = 12
stroke_acc_threshold = 0.95
draw_seq = False
draw_color_order = True
# set numpy output to something sensible
np.set_printoptions(precision=8, edgeitems=6, linewidth=200, suppress=True)
main_testing(test_image_base_dir, test_dataset, test_image_name,
sampling_base_dir, model_base_dir, model_name, sampling_num,
draw_seq=draw_seq, draw_order=draw_color_order,
state_dependent=state_dependent, longer_infer_lens=longer_infer_lens,
round_stop_state_num=round_stop_state_num, stroke_acc_threshold=stroke_acc_threshold)
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('--input', '-i', type=str, default='', help="The test image name.")
parser.add_argument('--model', '-m', type=str, default='pretrain_clean_line_drawings', help="The trained model.")
parser.add_argument('--sample', '-s', type=int, default=1, help="The number of outputs.")
args = parser.parse_args()
assert args.input != ''
assert args.sample > 0
main(args.model, args.input, args.sample)
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