OpenCV python 图像坐标系

OpenCV python 图像坐标系

所需资源文件:
图片文件下载地址

# -*- coding: utf-8 -*-
import cv2


def main():

    # 1.读取图片 打印图片形状
    img_src = cv2.imread('./image/Lenna.png', cv2.IMREAD_UNCHANGED)
    img_copy = img_src.copy()
    print('Lenna 图片形状:', img_src.shape)

    logo = cv2.imread('./image/opencv_logo.png', cv2.IMREAD_UNCHANGED)
    logo = cv2.resize(logo, (20, 20))
    print('opencv_logo 图片形状:', logo.shape)

    butterfly = cv2.imread('./image/butterfly.jpg', cv2.IMREAD_UNCHANGED)
    butterfly = cv2.resize(butterfly, (20, 20))
    print('butterfly 图片形状:', butterfly.shape)

    # 2.读取 坐标 y, x的值并打印
    y = 100
    x = 50
    (b, g, r) = img_src[y, x]
    print('蓝色:', b, '蓝色:', g, '红色:', r)

    # 3.将 Logo butterfly 图片贴在原图上
    img_src[100:100 + logo.shape[0], 300:300 + logo.shape[1]] = logo[:, :, 0:3]  # 两张图片的shape不一样
    img_src[300:300 + butterfly.shape[1], 100:100 + butterfly.shape[0]] = butterfly[:, :, 0:3]

    # 4.使用文字标识 坐标值
    font = cv2.FONT_HERSHEY_SIMPLEX
    cv2.putText(img_src, text='X=0,Y=0', org=(0, 0), fontFace=font, fontScale=0.5,
                color=(0, 255, 0), thickness=2, bottomLeftOrigin=True)
    cv2.putText(img_src, text='X=10,Y=30', org=(10, 30), fontFace=font, fontScale=0.5,
                color=(0, 255, 0), thickness=2)
    cv2.putText(img_src, text='X=100,Y=300', org=(100, 300), fontFace=font, fontScale=0.5,
                color=(0, 255, 0), thickness=2)
    cv2.putText(img_src, text='X=300,Y=100', org=(300, 100), fontFace=font, fontScale=0.5,
                color=(0, 255, 0), thickness=2)

    # 5.显示结果图片 移动图片位置
    cv2.imshow('src', img_copy)
    cv2.moveWindow('src', 0, 0)

    cv2.imshow('img+logo', img_src)
    cv2.moveWindow('img+logo', x=img_src.shape[1], y=0)

    # 6.写入图片
    cv2.imwrite('img_logo.jpg', img_src)

    cv2.waitKey(0)


if __name__ == '__main__':
    main()

处理结果图片