10.31OpenCV作业

实现图片中划线并保存

import cv2

def draw_test(event,x,y,flag,param):
    global drawing
    # cv2.EVENT_LBUTTONDOWN  鼠键左键按下事件
    if event == cv2.EVENT_LBUTTONDOWN:
        drawing = True
    # cv2.EVENT_MOUSEMOVE  鼠键左键移动事件
    elif event == cv2.EVENT_MOUSEMOVE:
        if drawing:
            cv2.circle(img,(x,y),15,(255,0,0),-1)

    #cv2.EVENT_LBUTTONUP  鼠键左键释放事件
    elif event == cv2.EVENT_LBUTTONUP:
        drawing = False
        cv2.circle(img, (x, y), 15, (255, 0, 0), -1)

img= cv2.imread('images/car.png')
cv2.namedWindow('image')

cv2.setMouseCallback('image', draw_test)
# 真正的标志，表示是否正在绘制
drawing = False
while(True):
    cv2.imshow('image', img)
    if cv2.waitKey(20) == 115:
        rs = cv2.imwrite("save_image/car1.png", img)
    if cv2.waitKey(20) == 27:  # 按ESC退出
        break
cv2.destroyAllWindows()

实现摄像头捕捉和文本显示且鼠标点击文本中的数字加一

import cv2
from PIL import Image, ImageDraw, ImageFont
import numpy as np

def put_text(image, text, position, font_path, font_size, color):
    pil_image = Image.fromarray(cv2.cvtColor(image, cv2.COLOR_BGR2RGB))
    draw = ImageDraw.Draw(pil_image)
    font = ImageFont.truetype(font_path, font_size)
    draw.text(position, text, fill=color, font=font)
    image_with_text = cv2.cvtColor(np.array(pil_image), cv2.COLOR_RGB2BGR)
    return image_with_text

cap = cv2.VideoCapture(0)
cv2.namedWindow("name", cv2.WINDOW_NORMAL)
cv2.resizeWindow("name", 500, 300)

rocket_count = 0

def draw_test(event, x, y, flags, param):
    global rocket_count
    if event == cv2.EVENT_LBUTTONDOWN:
        rocket_count += 1

cv2.setMouseCallback("name", draw_test)

while True:
    ret, frame = cap.read()
    if ret:
        text = f"老铁们，火箭刷起来，你已刷个{rocket_count}火箭"
        position = (0, 50)
        font_path = "simhei.ttf"
        font_size = 25

        color = (255, 0, 0)
        frame = put_text(frame, text, position, font_path, font_size, color)

        cv2.imshow("name", frame)

    if cv2.waitKey(20) == 27:
        break

cap.release()
cv2.destroyAllWindows()