Page 273 - MDP2020-1

················································································ 명장양성프로젝트 【MDP】 과제발표회 자료집 Ⅰ | 267

if img_cropped.shape[1] / img_cropped.shape[0] < MIN_PLATE_RATIO or
img_cropped.shape[1] / img_cropped.shape[0] < MIN_PLATE_RATIO > MAX_PLATE_RATIO:
continue

plate_imgs.append(img_cropped)
plate_infos.append({
'x': int(plate_cx - plate_width / 2),
'y': int(plate_cy - plate_height / 2),
'w': int(plate_width),
'h': int(plate_height)
})

plt.subplot(len(matched_result), 1, i+1)
plt.imshow(img_cropped, cmap='gray')
longest_idx, longest_text = -1, 0
plate_chars = []
for i, plate_img in enumerate(plate_imgs):
plate_img = cv2.resize(plate_img, dsize=(0, 0), fx=1.6, fy=1.6)
_, plate_img = cv2.threshold(plate_img, thresh=0.0, maxval=255.0, type=cv2.THRESH_BINARY
| cv2.THRESH_OTSU)

# find contours again (same as above)
contours, _ = cv2.findContours(plate_img, mode=cv2.RETR_LIST,
method=cv2.CHAIN_APPROX_SIMPLE)

plate_min_x, plate_min_y = plate_img.shape[1], plate_img.shape[0]
plate_max_x, plate_max_y = 0, 0
for contour in contours:
x, y, w, h = cv2.boundingRect(contour)

area = w * h
ratio = w / h
if area > MIN_AREA \
and w > MIN_WIDTH and h > MIN_HEIGHT \
and MIN_RATIO < ratio < MAX_RATIO:
if x < plate_min_x:
plate_min_x = x
if y < plate_min_y:
plate_min_y = y
if x + w > plate_max_x:
plate_max_x = x + w
if y + h > plate_max_y:
plate_max_y = y + h

img_result = plate_img[plate_min_y:plate_max_y, plate_min_x:plate_max_x]