#!/usr/bin/env python """gen_pattern.py Usage example: python gen_pattern.py -o out.svg -r 11 -c 8 -T circles -s 20.0 -R 5.0 -u mm -w 216 -h 279 -o, --output - output file (default out.svg) -r, --rows - pattern rows (default 11) -c, --columns - pattern columns (default 8) -T, --type - type of pattern, circles, acircles, checkerboard (default circles) -s, --square_size - size of squares in pattern (default 20.0) -R, --radius_rate - circles_radius = square_size/radius_rate (default 5.0) -u, --units - mm, inches, px, m (default mm) -w, --page_width - page width in units (default 216) -h, --page_height - page height in units (default 279) -a, --page_size - page size (default A4), supersedes -h -w arguments -H, --help - show help """ import argparse from svgfig import * class PatternMaker: def __init__(self, cols, rows, output, units, square_size, radius_rate, page_width, page_height): self.cols = cols self.rows = rows self.output = output self.units = units self.square_size = square_size self.radius_rate = radius_rate self.width = page_width self.height = page_height self.g = SVG("g") # the svg group container def make_circles_pattern(self): spacing = self.square_size r = spacing / self.radius_rate pattern_width = ((self.cols - 1.0) * spacing) + (2.0 * r) pattern_height = ((self.rows - 1.0) * spacing) + (2.0 * r) x_spacing = (self.width - pattern_width) / 2.0 y_spacing = (self.height - pattern_height) / 2.0 for x in range(0, self.cols): for y in range(0, self.rows): dot = SVG("circle", cx=(x * spacing) + x_spacing + r, cy=(y * spacing) + y_spacing + r, r=r, fill="black", stroke="none") self.g.append(dot) def make_acircles_pattern(self): spacing = self.square_size r = spacing / self.radius_rate pattern_width = ((self.cols-1.0) * 2 * spacing) + spacing + (2.0 * r) pattern_height = ((self.rows-1.0) * spacing) + (2.0 * r) x_spacing = (self.width - pattern_width) / 2.0 y_spacing = (self.height - pattern_height) / 2.0 for x in range(0, self.cols): for y in range(0, self.rows): dot = SVG("circle", cx=(2 * x * spacing) + (y % 2)*spacing + x_spacing + r, cy=(y * spacing) + y_spacing + r, r=r, fill="black", stroke="none") self.g.append(dot) def make_checkerboard_pattern(self): spacing = self.square_size xspacing = (self.width - self.cols * self.square_size) / 2.0 yspacing = (self.height - self.rows * self.square_size) / 2.0 for x in range(0, self.cols): for y in range(0, self.rows): if x % 2 == y % 2: square = SVG("rect", x=x * spacing + xspacing, y=y * spacing + yspacing, width=spacing, height=spacing, fill="black", stroke="none") self.g.append(square) def save(self): c = canvas(self.g, width="%d%s" % (self.width, self.units), height="%d%s" % (self.height, self.units), viewBox="0 0 %d %d" % (self.width, self.height)) c.save(self.output) def main(): # parse command line options parser = argparse.ArgumentParser(description="generate camera-calibration pattern", add_help=False) parser.add_argument("-H", "--help", help="show help", action="store_true", dest="show_help") parser.add_argument("-o", "--output", help="output file", default="out.svg", action="store", dest="output") parser.add_argument("-c", "--columns", help="pattern columns", default="8", action="store", dest="columns", type=int) parser.add_argument("-r", "--rows", help="pattern rows", default="11", action="store", dest="rows", type=int) parser.add_argument("-T", "--type", help="type of pattern", default="circles", action="store", dest="p_type", choices=["circles", "acircles", "checkerboard"]) parser.add_argument("-u", "--units", help="length unit", default="mm", action="store", dest="units", choices=["mm", "inches", "px", "m"]) parser.add_argument("-s", "--square_size", help="size of squares in pattern", default="20.0", action="store", dest="square_size", type=float) parser.add_argument("-R", "--radius_rate", help="circles_radius = square_size/radius_rate", default="5.0", action="store", dest="radius_rate", type=float) parser.add_argument("-w", "--page_width", help="page width in units", default="216", action="store", dest="page_width", type=float) parser.add_argument("-h", "--page_height", help="page height in units", default="279", action="store", dest="page_width", type=float) parser.add_argument("-a", "--page_size", help="page size, supersedes -h -w arguments", default="A4", action="store", dest="page_size", choices=["A0", "A1", "A2", "A3", "A4", "A5"]) args = parser.parse_args() show_help = args.show_help if show_help: parser.print_help() return output = args.output columns = args.columns rows = args.rows p_type = args.p_type units = args.units square_size = args.square_size radius_rate = args.radius_rate page_size = args.page_size # page size dict (ISO standard, mm) for easy lookup. format - size: [width, height] page_sizes = {"A0": [840, 1188], "A1": [594, 840], "A2": [420, 594], "A3": [297, 420], "A4": [210, 297], "A5": [148, 210]} page_width = page_sizes[page_size.upper()][0] page_height = page_sizes[page_size.upper()][1] pm = PatternMaker(columns, rows, output, units, square_size, radius_rate, page_width, page_height) # dict for easy lookup of pattern type mp = {"circles": pm.make_circles_pattern, "acircles": pm.make_acircles_pattern, "checkerboard": pm.make_checkerboard_pattern} mp[p_type]() # this should save pattern to output pm.save() if __name__ == "__main__": main()