手写绘制
import cv2 import numpy as np import pygame from pygame.locals import * # 初始化Pygame pygame.init() screen = pygame.display.set_mode((640, 480)) pygame.display.set_caption("Handwriting with Finger") # 设置画笔参数 WHITE = (255, 255, 255) BLACK = (0, 0, 0) brush_size = 5 brush_color = BLACK drawing = False # 创建一张空白画布 canvas = np.ones((480, 640, 3), dtype=np.uint8) * 255 # 定义绘制函数 def draw_on_canvas(pos): pygame.draw.circle(canvas, brush_color, pos, brush_size) # 开启摄像头 cap = cv2.VideoCapture(0) while True: ret, frame = cap.read() frame = cv2.flip(frame, 1) frame = cv2.resize(frame, (640, 480)) # 手指移动检测 gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) _, thresh = cv2.threshold(gray, 120, 255, cv2.THRESH_BINARY) contours, _ = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE) if contours: cnt = max(contours, key=cv2.contourArea) M = cv2.moments(cnt) if M["m00"] != 0: cx = int(M["m10"] / M["m00"]) cy = int(M["m01"] / M["m00"]) if 0 < cx < 640 and 0 < cy < 480: draw_on_canvas((cx, cy)) # 显示画布 cv2.imshow("Canvas", canvas) # 退出循环 if cv2.waitKey(1) & 0xFF == ord('q'): break # 释放资源 cap.release() cv2.destroyAllWindows()