基于OpenCV如何实现动态画矩形和多边形并保存坐标

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1 画矩形和多边形，模式通过键盘控制

# 通过键盘s和p区别画矩形和多边形并保存坐标# 画矩形是OPencv自带的，只能通过按enter结束 import copyimport JSONimport joblibimport cv2import numpy as npimport osimport matplotlib.pyplot as pltimport imutilsfrom win32 import win32gui, win32printfrom win32.lib import win32conWIN_NAME = 'draw_rect'   def get_list0(path):    if not os.path.exists(path):        print("记录该型号标准位置的文件缺失/或输入型号与其对应标准文件名称不一致")    file1 = open(path, 'r')    lines = file1.readlines()    # for line in lines:    #     if (any(kw in line for kw in kws)):    #         SeriousFix.write(line + '\n')    zb0, list0 = [], []    for i in range(len(lines)):  # 取坐标        if lines[i] != '(pt1,pt2):\n':            zb0.append(lines[i][:-1])    # print(zb0)    for i in range(0, len(zb0)):  # 转换整数        zb0[i] = int(zb0[i])    # print(zb0)     for i in range(0, len(zb0), 4):  # 每四个取一次，加入列表        x0, y0, x1, y1 = zb0[i: i + 4]         # 使点设为左上至右下        if y1<=y0:            temp = y0            y0 = y1            y1 = temp         # print(x0,y0,x1,y1)        list0.append([x0, y0, x1, y1])    print("list0:", list0)    file1.close()    return list0  '''        初始校验文件，文件名代表类型，检验时读取文件名作为类型判断标准        打开sourse文件夹，读取标准件原始图片，保存标准位置到biaozhun/labels，保存画有标准位置的图片到biaozhun/imgs'''def define_start(img_name, img_path, type):    pts = []  # 用于存放点     def draw_roi(event, x, y, flags, param):        img2 = img.copy()        # print("----------")        # cv2.imshow("img2", img2)        # cv2.waiTKEy(0)         if event == cv2.EVENT_LBUTTONDOWN:  # 左键点击，选择点            pts.append((x, y))         if event == cv2.EVENT_RBUTTONDOWN:  # 右键点击，取消最近一次选择的点            pts.pop()         if event == cv2.EVENT_MBUTTONDOWN:  # 中键绘制轮廓             cv2.line(img=img2, pt1=pts[0], pt2=pts[-1], color=(255, 0, 0), thickness=2)             for i in range(len(pts)):                txt_save.append("(pt1,pt2):")                txt_save.append(str(pts[i][0]))                txt_save.append(str(pts[i][1]))         if len(pts) > 0:            # 将pts中的最后一点画出来            cv2.circle(img2, pts[-1], 3, (0, 0, 255), -1)         if len(pts) > 1:            # 画线            for i in range(len(pts) - 1):                cv2.circle(img2, pts[i], 5, (0, 0, 255), -1)  # x ,y 为鼠标点击地方的坐标                cv2.line(img=img2, pt1=pts[i], pt2=pts[i + 1], color=(255, 0, 0), thickness=2)            cv2.line(img=img2, pt1=pts[0], pt2=pts[-1], color=(255, 0, 0), thickness=2)         cv2.imshow(WIN_NAME, img2)     def set_ratio(image):        if image is None:            return 0, 0, 0        # print(image.shape)        img_h, img_w = image.shape[:2]        """获取真实的分辨率"""        hDC = win32gui.GetDC(0)        screen_w = win32print.GetDeviceCaps(hDC, win32con.DESKTOPHORZRES)  # 横向分辨率        screen_h = win32print.GetDeviceCaps(hDC, win32con.DESKTOPVERTRES)  # 纵向分辨率        # print(img_w,img_h)         num_wh = 1        if img_w * img_h > 1.9e7:  # 两千万像素            num_wh = 4        elif img_w * img_h > 1.0e7:  # 一千万像素            num_wh = 3        elif min(img_w, img_h) >= min(screen_w, screen_h) or \                max(img_w, img_h) >= max(screen_w, screen_h):            num_wh = 2        else:            num_wh = 1         ratio_h = int(img_h / num_wh)        ratio_w = int(img_w / num_wh)         return ratio_h, ratio_w, num_wh     (filepath, file) = os.path.split(img_path)     # file = 'r.jpg'      # 需要用户选择图片，传入图片的名称     if file.endswith(".jpg") or file.endswith(".png"):  # 如果file以jpg结尾        # img_dir = os.path.join(file_dir, file)        image = cv2.imread(img_path)         ratio_h, ratio_w, num_wh = set_ratio(image)        if ratio_h == 0 and ratio_w == 0 and num_wh == 0:            print("No image")         txt_path = "./DrawRect/biaozhun/labels/%s.txt" % (img_name)        open(txt_path, 'w').close()  # 清空文件数据        f = open(txt_path, mode='a+')        txt_save = []         img = imutils.resize(image, width = ratio_w)        cv2.namedWindow(WIN_NAME, cv2.WINDOW_NORMAL)        # # cv2.namedWindow(WIN_NAME, 2)        cv2.resizeWindow(WIN_NAME, ratio_w, ratio_h)        cv2.imshow(WIN_NAME, img)        # cv2.waitKey(1)         key = cv2.waitKey(0)         # 矩形        if key == ord("s"):            roi = cv2.selectROI(windowName=WIN_NAME, img=img, showCrosshair=False, fromCenter=False)            x, y, w, h = roi            cv2.rectangle(img=img, pt1=(x, y), pt2=(x + w, y + h), color=(0, 0, 255), thickness=2)             print('pt1: x = %d, y = %d' % (x, y))            txt_save.append("(pt1,pt2):")            txt_save.append(str(x))            txt_save.append(str(y))            txt_save.append(str(x + w))            txt_save.append(str(y + h))             cv2.imshow(WIN_NAME, img)            cv2.waitKey(0)             # 保存txt坐标            num_txt_i = 0            for txt_i in range(len(txt_save)):                txt_i = txt_i - num_txt_i                if txt_save[txt_i] == 'delete':                    for j in range(6):                        del txt_save[txt_i - j]                    num_txt_i += 6            for txt_i in txt_save:                f.write(str(txt_i) + '\n')            print("txt_save:", txt_save)            # break            f.close()             # 查找距离较近的，删除            points_list = get_list0(txt_path)            new_points_list = []            for i in points_list:                x0, y0, x1, y1 = i[0], i[1], i[2], i[3]                if abs(x1 - x0) > 5 and abs(y1 - y0) > 5:                    new_points_list.append('(pt1,pt2):')                    new_points_list.append(x0)                    new_points_list.append(y0)                    new_points_list.append(x1)                    new_points_list.append(y1)            print(new_points_list)            file2 = open(txt_path, 'w')            for i in new_points_list:                file2.write(str(i) + '\n')            file2.close()         # 多边形        elif key == ord("p"):            print("---")             cv2.setMouseCallback(WIN_NAME, draw_roi)             while True:                key = cv2.waitKey(1)                if key == 13 or cv2.getWindowProperty(WIN_NAME, 0) == -1:  # enter回车键:                    # 保存txt坐标                     for i in range(len(pts)):                        txt_save.append("(pt1,pt2):")                        txt_save.append(str(pts[i][0]))                        txt_save.append(str(pts[i][1]))                     num_txt_i = 0                    for txt_i in range(len(txt_save)):                        txt_i = txt_i - num_txt_i                        if txt_save[txt_i] == 'delete':                            for j in range(6):                                del txt_save[txt_i - j]                            num_txt_i += 6                    for txt_i in txt_save:                        f.write(str(txt_i) + '\n')                    print("txt_save:", txt_save)                    # break                    f.close()                 # 现在是多边形之前的方法不行                    # # 查找距离较近的，删除                    # points_list = get_list0(txt_path)                    # new_points_list = []                    # for i in points_list:                    #     x0, y0, x1, y1 = i[0], i[1], i[2], i[3]                    #     if abs(x1 - x0) > 5 and abs(y1 - y0) > 5:                    #         new_points_list.append('(pt1,pt2):')                    #         new_points_list.append(x0)                    #         new_points_list.append(y0)                    #         new_points_list.append(x1)                    #         new_points_list.append(y1)                    # print(new_points_list)                    # file2 = open(txt_path, 'w')                    # for i in new_points_list:                    #     file2.write(str(i) + '\n')                    # file2.close()                     break            cv2.destroyAllwindows()      else:        print("输入图片类型错误！请输入JPG/PNG格式的图片！")   if __name__ == '__main__':    # path_file = open('./datasets/drawPath.json', 'r')    path_file = open('./DataSet/drawPath.json', 'r')    path_dic = json.load(path_file)    img_path = path_dic['path']         # # 绘制标准图片的地址    path_file.close()    img_name = img_path.split('\\')[-1][:-4]    define_start(img_name, img_path, 0)

drawPath.json文件

{"path": "D:\\ALLBuffers\\PyCharm\\OpencvRun\\DataSet\\smpj.jpg"}

2 修改后默认情况下直接画多边形，按鼠标中键切换为画矩形模式

## 1 程序默认运行是直接绘多边形，直接点击即可，## 绘制完成后点击右上角的X或按enter即可关闭图像并保存坐标## 2 在默认情况下，单击鼠标中键或空格即可切换为矩形模式## 3 在绘制矩形模式下只能通过按enter关闭图像并保存坐标## 4 在绘制矩形模式下鼠标左键取消上一步操作或重新绘制矩形## 5 在绘制多边形时鼠标右键取消上一步操作 import copyimport jsonimport joblibimport cv2import numpy as npimport osimport matplotlib.pyplot as pltimport imutilsfrom win32 import win32gui, win32printfrom win32.lib import win32con WIN_NAME = 'draw_rect'  def get_list0(path):    if not os.path.exists(path):        print("记录该型号标准位置的文件缺失/或输入型号与其对应标准文件名称不一致")    file1 = open(path, 'r')    lines = file1.readlines()    # for line in lines:    #     if (any(kw in line for kw in kws)):    #         SeriousFix.write(line + '\n')    zb0, list0 = [], []    for i in range(len(lines)):  # 取坐标        if lines[i] != '(pt1,pt2):\n':            zb0.append(lines[i][:-1])    # print(zb0)    for i in range(0, len(zb0)):  # 转换整数        zb0[i] = int(zb0[i])    # print(zb0)     for i in range(0, len(zb0), 4):  # 每四个取一次，加入列表        x0, y0, x1, y1 = zb0[i: i + 4]         # 使点设为左上至右下        if y1<=y0:            temp = y0            y0 = y1            y1 = temp         # print(x0,y0,x1,y1)        list0.append([x0, y0, x1, y1])    print("list0:", list0)    file1.close()    return list0  '''        初始校验文件，文件名代表类型，检验时读取文件名作为类型判断标准        打开sourse文件夹，读取标准件原始图片，保存标准位置到biaozhun/labels，保存画有标准位置的图片到biaozhun/imgs'''POLYLINES = False  # 多边形向矩形切换  def define_start(img_name, img_path, type):    pts = []  # 用于存放点     def draw_roi(event, x, y, flags, param):         img2 = img.copy()         if event == cv2.EVENT_LBUTTONDOWN:  # 左键点击，选择点            pts.append((x, y))            cv2.circle(img2, pts[-1], 3, (0, 255, 0), -1)        #        # if event == cv2.EVENT_MOUSEMOVE:  # 画圆        #     if len(pts) >= 1:        #         radius = np.sqrt(pow(x-pts[0][0],2) + pow(y-pts[0][1],2))        #         radius = int(radius)        #         rs.append(radius)        #         cv2.circle(img2, pts[0], rs[-1], (0, 0, 255), 2)  # x ,y 为鼠标点击地方的坐标        #          if event == cv2.EVENT_RBUTTONDOWN:  # 右键点击，取消最近一次选择的点            if len(pts) >= 1:                pts.pop()          if event == cv2.EVENT_MBUTTONDOWN:  # 中键绘制轮廓            global POLYLINES            # print("MBUTTONDOWN:  # 中键绘制轮廓")            POLYLINES = True         if len(pts) > 0:            # 将pts中的最后一点画出来            cv2.circle(img2, pts[-1], 3, (0, 255, 0), -1)          if len(pts) > 1:             # 画线            for i in range(len(pts) - 1):                cv2.circle(img2, pts[i], 5, (0, 255, 0), -1)  # x ,y 为鼠标点击地方的坐标                cv2.line(img=img2, pt1=pts[i], pt2=pts[i + 1], color=(0, 0, 255), thickness=2)            cv2.line(img=img2, pt1=pts[0], pt2=pts[-1], color=(0, 0, 255), thickness=2)         cv2.imshow(WIN_NAME, img2)     def set_ratio(image):        if image is None:            return 0, 0, 0        # print(image.shape)        img_h, img_w = image.shape[:2]        """获取真实的分辨率"""        hDC = win32gui.GetDC(0)        screen_w = win32print.GetDeviceCaps(hDC, win32con.DESKTOPHORZRES)  # 横向分辨率        screen_h = win32print.GetDeviceCaps(hDC, win32con.DESKTOPVERTRES)  # 纵向分辨率        # print(img_w,img_h)         num_wh = 1        if img_w * img_h > 1.9e7:  # 两千万像素            num_wh = 4        elif img_w * img_h > 1.0e7:  # 一千万像素            num_wh = 3        elif min(img_w, img_h) >= min(screen_w, screen_h) or \                max(img_w, img_h) >= max(screen_w, screen_h):            num_wh = 2        else:            num_wh = 1         ratio_h = int(img_h / num_wh)        ratio_w = int(img_w / num_wh)         return ratio_h, ratio_w, num_wh     (filepath, file) = os.path.split(img_path)     # file = 'r.jpg'      # 需要用户选择图片，传入图片的名称     if file.endswith(".jpg") or file.endswith(".png"):  # 如果file以jpg结尾        # img_dir = os.path.join(file_dir, file)        image = cv2.imread(img_path)         ratio_h, ratio_w, num_wh = set_ratio(image)        if ratio_h == 0 and ratio_w == 0 and num_wh == 0:            print("No image")         txt_path = "./DrawRect/biaozhun/labels/%s.txt" % (img_name)        open(txt_path, 'w').close()  # 清空文件数据        f = open(txt_path, mode='a+')        txt_save = []         img = imutils.resize(image, width = ratio_w)        cv2.namedWindow(WIN_NAME, cv2.WINDOW_NORMAL)        cv2.resizeWindow(WIN_NAME, ratio_w, ratio_h)        cv2.imshow(WIN_NAME, img)         # 默认直接执行画多边形        cv2.setMouseCallback(WIN_NAME, draw_roi)         while True:            w_key = cv2.waitKey(1)            # enter 或回车键:            if w_key == 13 or cv2.getWindowProperty(WIN_NAME, 0) == -1:                for i in range(len(pts)):                    if i == 0:                      txt_save.append("(pt1,pt2):")                    txt_save.append(str(pts[i][0]))                    txt_save.append(str(pts[i][1]))                 num_txt_i = 0                for txt_i in range(len(txt_save)):                    txt_i = txt_i - num_txt_i                    if txt_save[txt_i] == 'delete':                        for j in range(6):                            del txt_save[txt_i - j]                        num_txt_i += 6                for txt_i in txt_save:                    f.write(str(txt_i) + '\n')                print("txt_save:", txt_save)                break                f.close()                 # 现在是多边形之前的方法不行                # # 查找距离较近的，删除                # points_list = get_list0(txt_path)                # new_points_list = []                # for i in points_list:                #     x0, y0, x1, y1 = i[0], i[1], i[2], i[3]                #     if abs(x1 - x0) > 5 and abs(y1 - y0) > 5:                #         new_points_list.append('(pt1,pt2):')                #         new_points_list.append(x0)                #         new_points_list.append(y0)                #         new_points_list.append(x1)                #         new_points_list.append(y1)                # print(new_points_list)                # file2 = open(txt_path, 'w')                # for i in new_points_list:                #     file2.write(str(i) + '\n')                # file2.close()             # 空格切换至矩形            if POLYLINES == True or w_key == 32:                roi = cv2.selectROI(windowName=WIN_NAME, img=img, showCrosshair=False, fromCenter=False)                x, y, w, h = roi                cv2.rectangle(img=img, pt1=(x, y), pt2=(x + w, y + h), color=(0, 0, 255), thickness=2)                 print('pt1: x = %d, y = %d' % (x, y))                txt_save.append("(pt1,pt2):")                txt_save.append(str(x))                txt_save.append(str(y))                txt_save.append(str(x + w))                txt_save.append(str(y + h))                 # 用红色框显示ROI                # cv2.imshow(WIN_NAME, img)                # cv2.waitKey(0)                 # 保存txt坐标                num_txt_i = 0                for txt_i in range(len(txt_save)):                    txt_i = txt_i - num_txt_i                    if txt_save[txt_i] == 'delete':                        for j in range(6):                            del txt_save[txt_i - j]                        num_txt_i += 6                for txt_i in txt_save:                    f.write(str(txt_i) + '\n')                print("txt_save:", txt_save)                # break                f.close()                 # 查找距离较近的，删除                points_list = get_list0(txt_path)                new_points_list = []                for i in points_list:                    x0, y0, x1, y1 = i[0], i[1], i[2], i[3]                    if abs(x1 - x0) > 5 and abs(y1 - y0) > 5:                        new_points_list.append('(pt1,pt2):')                        new_points_list.append(x0)                        new_points_list.append(y0)                        new_points_list.append(x1)                        new_points_list.append(y1)                print(new_points_list)                file2 = open(txt_path, 'w')                for i in new_points_list:                    file2.write(str(i) + '\n')                file2.close()                break        cv2.destroyAllWindows()     else:        print("输入图片类型错误！请输入JPG/PNG格式的图片！")  if __name__ == '__main__':    # path_file = open('./datasets/drawPath.json', 'r')    path_file = open('./DataSet/drawPath.json', 'r')    path_dic = json.load(path_file)    img_path = path_dic['path']         # # 绘制标准图片的地址    path_file.close()    img_name = img_path.split('\\')[-1][:-4]    define_start(img_name, img_path, 0)

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