获取最大轮廓对应的掩码图

获取最大轮廓对应的掩码图

根据连通域分析，获取轮廓面积最大的轮廓并可视化。

示例代码

def get_max_contour_mask(mask):
    # Find connected components
    # mask = cv2.inRange(mask, 100, 255)
    num_labels, labels, stats, centroids = cv2.connectedComponentsWithStats(
        mask, connectivity=8
    )

    # Initialize variables to keep track of the largest contour
    max_area = 0
    max_label = 0

    # Loop over each component to find the largest one
    for i in range(1, num_labels):
        area = stats[i, cv2.CC_STAT_AREA]
        if area > max_area:
            max_area = area
            max_label = i

    # Create a mask for the largest contour
    mask = np.zeros_like(labels, dtype=np.uint8)
    mask[labels == max_label] = 255

    return mask