45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
import cv2
|
|
import numpy as np
|
|
|
|
def resize_image(image, max_size=1200):
|
|
# 获取原始尺寸
|
|
height, width = image.shape[:2]
|
|
# 计算缩放比例
|
|
scale = min(max_size/width, max_size/height)
|
|
if scale < 1:
|
|
# 只有当图像过大时才进行缩放
|
|
new_width = int(width * scale)
|
|
new_height = int(height * scale)
|
|
resized = cv2.resize(image, (new_width, new_height))
|
|
return resized, scale
|
|
return image, 1.0
|
|
|
|
def mouse_callback(event, x, y, flags, param):
|
|
if event == cv2.EVENT_LBUTTONDOWN:
|
|
# 计算原始图像上的坐标
|
|
original_x = int(x / scale)
|
|
original_y = int(y / scale)
|
|
print(f'原始图像坐标 (x, y): ({original_x}, {original_y})')
|
|
# 在缩放后的图像上标记点击位置
|
|
cv2.circle(displayed_img, (x, y), 3, (0, 255, 0), -1)
|
|
cv2.imshow('image', displayed_img)
|
|
|
|
# 读取图像
|
|
img = cv2.imread(r"E:\datasets\UAV\134\project\images\20240312_093841_W_W.jpg")
|
|
if img is None:
|
|
print('错误：无法读取图像')
|
|
exit()
|
|
|
|
# 缩放图像
|
|
displayed_img, scale = resize_image(img)
|
|
|
|
# 创建窗口并设置鼠标回调函数
|
|
cv2.imshow('image', displayed_img)
|
|
cv2.setMouseCallback('image', mouse_callback)
|
|
|
|
# 等待按键，按 'q' 退出
|
|
while True:
|
|
if cv2.waitKey(1) & 0xFF == ord('q'):
|
|
break
|
|
|
|
cv2.destroyAllWindows() |