def get_pixels_from_path(path: QPainterPath) -> list:
polygons = path.toFillPolygons()
result = []
for polygon in polygons:
for i in range(polygon.size()):
result.append(polygon.at(i))
return result
def count_area(outline_path: QPainterPath, ratio: int = 1) -> float:
"""
:param outline_path: 轮廓的像素的矩阵
:param ratio: 图像的分辨率 以米为单位
:return: float类型的面积
"""
fills = outline_path.toFillPolygons()
j = 0
counter = []
for j in range(len(fills)):
fill = fills[j]
print(fill)
i = 0
counter.append([])
counter[j] = []
for i in range(fill.__len__()):
x = int(fill.value(i).x())
y = int(fill.value(i).y())
counter[j].append([x, y])
i = i + 1
counter[j] = np.array(counter[j], dtype='int32')
j = j + 1
totalarea = 0.0
i = 0
for j in counter:
area = cv2.contourArea(counter[i])
totalarea = area * ratio + totalarea
i = i + 1
return totalarea
