https://github.com/MarkMoHR/virtual_sketching
Tip revision: 958efe45a9120b9d467ba7701efba28c11e38f8f authored by Your Name on 21 August 2021, 08:13:15 UTC
Added bilibili links
Added bilibili links
Tip revision: 958efe4
svg_conversion.py
import os
import argparse
import numpy as np
from xml.dom import minidom
def write_svg_1(path_list, img_size, save_path):
''' A long curve consisting of several strokes forms a path. '''
impl = minidom.getDOMImplementation()
doc = impl.createDocument(None, None, None)
rootElement = doc.createElement('svg')
rootElement.setAttribute('xmlns', 'http://www.w3.org/2000/svg')
rootElement.setAttribute('height', str(img_size))
rootElement.setAttribute('width', str(img_size))
path_num = len(path_list)
for path_i in range(path_num):
path_items = path_list[path_i]
assert len(path_items) > 0
if len(path_items) == 1:
continue
childElement = doc.createElement('path')
childElement.setAttribute('id', 'curve_' + str(path_i))
childElement.setAttribute('stroke', '#000000')
childElement.setAttribute('stroke-width', '3.5')
childElement.setAttribute('stroke-linejoin', 'round')
childElement.setAttribute('stroke-linecap', 'round')
childElement.setAttribute('fill', 'none')
command_str = ''
for stroke_i, stroke_item in enumerate(path_items):
if stroke_i == 0:
command_str += 'M '
stroke_position = stroke_item[0]
command_str += str(stroke_position[0]) + ', ' + str(stroke_position[1]) + ' '
else:
command_str += 'Q '
ctrl_position, stroke_position, stroke_width = stroke_item[0], stroke_item[1], stroke_item[2]
ctrl_position_0 = last_position[0] + (stroke_position[0] - last_position[0]) * ctrl_position[1]
ctrl_position_1 = last_position[1] + (stroke_position[1] - last_position[1]) * ctrl_position[0]
command_str += str(ctrl_position_0) + ', ' + str(ctrl_position_1) + ', ' + \
str(stroke_position[0]) + ', ' + str(stroke_position[1]) + ' '
last_position = stroke_position
childElement.setAttribute('d', command_str)
rootElement.appendChild(childElement)
doc.appendChild(rootElement)
f = open(save_path, 'w')
doc.writexml(f, addindent=' ', newl='\n')
f.close()
def write_svg_2(path_list, img_size, save_path):
''' A single stroke forms a path. '''
impl = minidom.getDOMImplementation()
doc = impl.createDocument(None, None, None)
rootElement = doc.createElement('svg')
rootElement.setAttribute('xmlns', 'http://www.w3.org/2000/svg')
rootElement.setAttribute('height', str(img_size))
rootElement.setAttribute('width', str(img_size))
path_num = len(path_list)
for path_i in range(path_num):
path_items = path_list[path_i]
assert len(path_items) > 0
if len(path_items) == 1:
continue
for stroke_i, stroke_item in enumerate(path_items):
if stroke_i == 0:
last_position = stroke_item[0]
else:
childElement = doc.createElement('path')
childElement.setAttribute('id', 'curve_' + str(path_i))
childElement.setAttribute('stroke', '#000000')
childElement.setAttribute('stroke-linejoin', 'round')
childElement.setAttribute('stroke-linecap', 'round')
childElement.setAttribute('fill', 'none')
command_str = 'M ' + str(last_position[0]) + ', ' + str(last_position[1]) + ' '
command_str += 'Q '
ctrl_position, stroke_position, stroke_width = stroke_item[0], stroke_item[1], stroke_item[2]
ctrl_position_0 = last_position[0] + (stroke_position[0] - last_position[0]) * ctrl_position[1]
ctrl_position_1 = last_position[1] + (stroke_position[1] - last_position[1]) * ctrl_position[0]
command_str += str(ctrl_position_0) + ', ' + str(ctrl_position_1) + ', ' + \
str(stroke_position[0]) + ', ' + str(stroke_position[1]) + ' '
last_position = stroke_position
childElement.setAttribute('d', command_str)
childElement.setAttribute('stroke-width', str(stroke_width * img_size / 1.66))
rootElement.appendChild(childElement)
doc.appendChild(rootElement)
f = open(save_path, 'w')
doc.writexml(f, addindent=' ', newl='\n')
f.close()
def convert_strokes_to_svg(data, init_cursor, image_size, infer_lengths, init_width, save_path, svg_type,
cursor_type='next', min_window_size=32, raster_size=128):
"""
:param data: (N_strokes, 7): flag, x_c, y_c, dx, dy, r, ds
:return:
"""
cursor_idx = 0
absolute_strokes = []
absolute_strokes_path = []
if init_cursor.ndim == 1:
init_cursor = [init_cursor]
for round_idx in range(len(infer_lengths)):
round_length = infer_lengths[round_idx]
cursor_pos = init_cursor[cursor_idx] # (2)
cursor_idx += 1
cursor_pos_large = cursor_pos * float(image_size)
if len(absolute_strokes_path) > 0:
absolute_strokes.append(absolute_strokes_path)
absolute_strokes_path = [[cursor_pos_large]]
prev_width = init_width
prev_scaling = 1.0
prev_window_size = float(raster_size) # (1)
for round_inner_i in range(round_length):
stroke_idx = np.sum(infer_lengths[:round_idx]).astype(np.int32) + round_inner_i
curr_window_size_raw = prev_scaling * prev_window_size
curr_window_size_raw = np.maximum(curr_window_size_raw, min_window_size)
curr_window_size_raw = np.minimum(curr_window_size_raw, image_size)
# curr_window_size = int(round(curr_window_size_raw)) # ()
stroke_params = data[stroke_idx, 1:] # (6)
pen_state = data[stroke_idx, 0]
next_width = stroke_params[4]
next_scaling = stroke_params[5]
next_width_abs = next_width * curr_window_size_raw / float(image_size)
prev_scaling = next_scaling
prev_window_size = curr_window_size_raw
# update cursor_pos based on hps.cursor_type
new_cursor_offsets = stroke_params[2:4] * (float(curr_window_size_raw) / 2.0) # (1, 6), 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 + new_cursor_offset_next # (2), large-level
if pen_state == 0:
absolute_strokes_path.append([stroke_params[0:2], stroke_position_next, next_width_abs])
else:
absolute_strokes.append(absolute_strokes_path)
absolute_strokes_path = [[stroke_position_next]]
if cursor_type == 'next':
cursor_pos_large = stroke_position_next # (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)) # (2), large-level
cursor_pos = cursor_pos_large / float(image_size)
absolute_strokes.append(absolute_strokes_path)
if svg_type == 'cluster':
write_svg_1(absolute_strokes, image_size, save_path)
elif svg_type == 'single':
write_svg_2(absolute_strokes, image_size, save_path)
else:
raise Exception('Unknown svg_type', svg_type)
def data_convert_to_absolute(npz_path, svg_type):
assert npz_path != ''
assert svg_type in ['single', 'cluster']
min_window_size = 32
raster_size = 128
split_idx = npz_path.rfind('/')
if split_idx == -1:
file_base = './'
file_name = npz_path[:-4]
else:
file_base = npz_path[:npz_path.rfind('/')]
file_name = npz_path[npz_path.rfind('/') + 1: -4]
svg_data_base = os.path.join(file_base, file_name)
os.makedirs(svg_data_base, exist_ok=True)
data = np.load(npz_path, encoding='latin1', allow_pickle=True)
strokes_data = data['strokes_data']
init_cursors = data['init_cursors']
image_size = data['image_size']
round_length = data['round_length']
init_width = data['init_width']
if round_length.ndim == 0:
round_lengths = [round_length]
else:
round_lengths = round_length
save_path = os.path.join(svg_data_base, str(svg_type) + '.svg')
convert_strokes_to_svg(strokes_data, init_cursors, image_size, round_lengths, init_width,
min_window_size=min_window_size, raster_size=raster_size, save_path=save_path,
svg_type=svg_type)
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('--file', '-f', type=str, default='', help="define a npz path")
parser.add_argument('--svg_type', '-st', type=str, choices=['single', 'cluster'], default='single',
help="svg type")
args = parser.parse_args()
data_convert_to_absolute(args.file, args.svg_type)