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draw.py
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draw.py
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import sys
import numpy as np
import cv2
import logging as log
import algorithm
from misc import COLORS, SYMBOLS
import lines as li
WIDTH_BOARD = 512 # used for board crop and perspective transform
def adapt(image):
if len(image.shape) == 2:
image = cv2.cvtColor(image, cv2.COLOR_GRAY2BGR)
elif len(image.shape) != 3:
log.error(f"image.shape: {image.shape}")
exit(1)
return image
def save(name, image, title=None):
if not hasattr(save, "i"):
save.i = 0
save.i += 1
if title is None:
title = f"{algorithm.basename}_{save.i:04d}_{name}.png"
log.debug(f"saving {title}...")
cv2.imwrite(title, image)
return
def add_weighted(image, canvas, w1=0.4, w2=0.6):
image = adapt(image)
cv2.addWeighted(image, w1, canvas, w2, 0, canvas)
return canvas
def corners(image, corners):
image = adapt(image)
min_x = np.min(corners[:, 0])
min_y = np.min(corners[:, 1])
max_x = np.max(corners[:, 0])
max_y = np.max(corners[:, 1])
pad_left = max(0, -min_x) + 4
pad_right = max(0, -(image.shape[1] - max_x)) + 4
pad_up = max(0, -min_y) + 4
pad_down = max(0, -(image.shape[0] - max_y)) + 4
image = cv2.copyMakeBorder(image, pad_up, pad_down, pad_left, pad_right,
cv2.BORDER_CONSTANT)
corners = np.copy(corners)
corners[:, 0] += pad_left
corners[:, 1] += pad_up
canvas = np.zeros(image.shape, dtype='uint8')
radius = round(5 * (image.shape[1] / WIDTH_BOARD))
name = ["TL", "TR", "BR", "BL"]
thick = round(2 * (image.shape[1] / WIDTH_BOARD))
for i, c in enumerate(corners):
color = (i*50, 30*i, 255 - i*40)
cv2.circle(canvas, c, radius,
color=color, thickness=-1)
cv2.putText(canvas, name[i], c,
cv2.FONT_HERSHEY_SIMPLEX, fontScale=0.75,
color=color, thickness=thick)
canvas = add_weighted(image, canvas)
return canvas
def points(image, inters):
image = adapt(image)
canvas = np.zeros(image.shape, dtype='uint8')
radius = round(5 * (image.shape[1] / WIDTH_BOARD))
for i, row in enumerate(inters):
for j, p in enumerate(row):
cv2.circle(canvas, p, radius,
color=(20 + i*20, 0, 100 + j*15), thickness=-1)
canvas = add_weighted(image, canvas)
return canvas
def lines(image, hori, vert=None, annotate_number=False):
image = adapt(image)
canvas = np.zeros(image.shape, dtype='uint8')
thick = round(2 * (image.shape[1] / WIDTH_BOARD))
def _draw(canvas, lines, color, kind=-1):
if kind != -1:
ll = len(lines)
legend = f"{ll} vertical" if kind == 0 else f"{ll} horizontal"
cv2.putText(canvas, legend, (20, 20 + 30*kind),
cv2.FONT_HERSHEY_SIMPLEX, fontScale=0.75,
color=color, thickness=thick)
else:
ll = len(lines)
legend = f"{ll} lines"
cv2.putText(canvas, legend, (20, 20),
cv2.FONT_HERSHEY_SIMPLEX, fontScale=0.75,
color=color, thickness=thick)
for i, line in enumerate(lines[:, :4]):
x0, y0, x1, y1 = line
angle = round(li.theta(line))
cv2.line(canvas, (x0, y0), (x1, y1),
color=color, thickness=thick)
if annotate_number:
x, y = x0 + 10, y0 + 10
if kind == 0:
x += 15*i
y += 30*i
if i == (len(lines) - 1):
y -= 100
x -= 30
else:
x += 5*i
if i == (len(lines) - 1):
y -= 20
x -= 80
cv2.putText(canvas, f"{i}.{angle}", (x, y),
cv2.FONT_HERSHEY_SIMPLEX, fontScale=0.75,
color=color, thickness=thick)
return canvas
if vert is not None:
vert = np.array(vert)
canvas = _draw(canvas, vert, (0, 255, 0), 0)
if hori is not None:
hori = np.array(hori)
canvas = _draw(canvas, hori, (255, 0, 80), 1)
canvas = add_weighted(image, canvas)
elif hori is not None:
hori = np.array(hori)
canvas = _draw(canvas, hori, (0, 0, 255))
canvas = add_weighted(image, canvas)
return canvas
def squares(image, squares):
image = adapt(image)
canvas = np.zeros(image.shape, dtype='uint8')
scale = round(1 + round(image.shape[1] / 1024))
def _get_coord(name):
letter = name[0].upper()
row = int(name[1]) - 1
col = ord(letter) - ord('A')
return col, row
def _draw_square(canvas, name):
col, row = _get_coord(name)
coord = squares[col, row, :4]
color = COLORS[col]
colortext = [max(0, c - 50) for c in color]
cv2.drawContours(canvas, [coord], -1, color=color, thickness=3)
cv2.putText(canvas, name, (coord[2, 0], coord[1, 1]),
cv2.FONT_HERSHEY_SIMPLEX, scale, colortext, thickness=2)
return canvas
for name in ["A1", "B2", "C3", "D4", "E5", "F6", "G7", "H8"]:
canvas = _draw_square(canvas, name)
canvas = add_weighted(image, canvas)
return canvas
def boxes(image, pieces, boardbox=None):
image = adapt(image)
canvas = np.zeros(image.shape, dtype='uint8')
thick = round(2 * (max(image.shape[1], image.shape[0]) / 1280))
for piece in pieces:
x0, y0, x1, y1, conf, num = piece[:6]
x0, y0, x1, y1 = int(x0), int(y0), int(x1), int(y1)
conf, num = round(conf/1000, 2), int(num)
color = COLORS[num]
symbol = SYMBOLS[num]
cv2.rectangle(canvas, (x0, y0), (x1, y1), color=color, thickness=thick)
cv2.putText(canvas, f"{symbol} {conf}", (x0 - 5, y0 - 7),
cv2.FONT_HERSHEY_SIMPLEX, 1, color, thick)
if boardbox is not None:
x0, y0, x1, y1 = boardbox[:4]
color = COLORS[0]
cv2.rectangle(canvas, (x0, y0), (x1, y1), color=color, thickness=thick)
cv2.putText(canvas, "Board", (x0 - 5, y0 - 7),
cv2.FONT_HERSHEY_SIMPLEX, 1, color, thick)
canvas = add_weighted(image, canvas)
return canvas
if __name__ == "__main__":
if len(sys.argv) >= 3:
image = cv2.imread(sys.argv[1])
canvas = cv2.imread(sys.argv[2])
canvas = add_weighted(image, canvas)
save("add_weighted", canvas)