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import cv2
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import numpy as np
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import glob
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from scipy.optimize import minimize
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import model
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import math
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import calc_way
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def needs_correction(dist_coeffs, error_threshold=0.5):
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k1, k2, p1, p2, k3 = dist_coeffs.ravel()
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if (abs(k1) > 0.1 or abs(k2) > 0.01 or abs(p1) > 0.005 or
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abs(p2) > 0.005 or abs(k3) > 0.01):
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return True
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return False
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def calibrate(image_fold, columns, rows, size):
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# 设置棋盘格参数
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chessboard_size = (columns, rows) # 内部角点数量 (columns, rows)
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square_size = size # 棋盘格方块实际大小（单位：毫米/厘米/英寸等）
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# 准备对象点 (0,0,0), (1,0,0), (2,0,0) ..., (8,5,0)
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objp = np.zeros((chessboard_size[0] * chessboard_size[1], 3), np.float32)
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objp[:, :2] = np.mgrid[0:chessboard_size[0], 0:chessboard_size[1]].T.reshape(-1, 2) * square_size
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# 存储对象点和图像点的数组
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objpoints = [] # 3D点（真实世界坐标）
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imgpoints = [] # 2D点（图像坐标）
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# 获取标定图像
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images = glob.glob(image_fold)
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# print("找到的图像文件:", images)
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for fname in images:
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img = cv2.imread(fname)
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gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
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# 查找棋盘格角点
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ret, corners = cv2.findChessboardCorners(gray, chessboard_size, None)
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# 如果找到，添加对象点和图像点
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if ret:
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objpoints.append(objp)
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# 亚像素级精确化
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criteria = (cv2.TERM_CRITERIA_EPS + cv2.TERM_CRITERIA_MAX_ITER, 30, 0.001)
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corners2 = cv2.cornerSubPix(gray, corners, (11, 11), (-1, -1), criteria)
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imgpoints.append(corners2)
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# 绘制并显示角点
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cv2.drawChessboardCorners(img, chessboard_size, corners2, ret)
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cv2.imshow('Corners', img)
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cv2.waitKey(500)
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cv2.destroyAllWindows()
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# 相机标定
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ret, camera_matrix, dist_coeffs, rvecs, tvecs = cv2.calibrateCamera(
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objpoints, imgpoints, gray.shape[::-1], None, None)
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# 输出标定结果
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print("相机内参矩阵（K矩阵）:\n", camera_matrix)
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print("\n畸变系数（k1, k2, p1, p2, k3）:\n", dist_coeffs)
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print("\n重投影误差:", ret)
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if needs_correction(dist_coeffs):
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print("需要矫正：畸变系数过大")
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else:
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print("无需矫正：畸变可忽略")
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return camera_matrix, dist_coeffs, rvecs, tvecs
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def find_corners(image_path, columns, rows):
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# 读取图像
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image = cv2.imread(image_path)
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gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
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# 定义棋盘格尺寸 (内角点数量，非方格数)
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pattern_size = (columns, rows) # 例如8x8的棋盘有7x7内角点
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# 查找棋盘格角点
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ret, corners = cv2.findChessboardCorners(gray, pattern_size, None)
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if ret:
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# 提高角点检测精度
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criteria = (cv2.TERM_CRITERIA_EPS + cv2.TERM_CRITERIA_MAX_ITER, 30, 0.001)
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corners = cv2.cornerSubPix(gray, corners, (11, 11), (-1, -1), criteria)
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# 绘制检测结果
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cv2.drawChessboardCorners(image, pattern_size, corners, ret)
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cv2.imshow('Chessboard Corners', image)
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cv2.waitKey(0)
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cv2.destroyAllWindows()
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else:
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print("未检测到棋盘格")
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print(corners)
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# 将形状从 (N,1,2) 转换为 (N,2)
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corners_reshaped = corners.reshape(-1, 2)
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# print("所有角点坐标:\n", corners_reshaped)
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fixed_value = 960 # 固定值
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column_index = 1 # 操作第2列（索引从0开始）
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# 方法：固定值 - 列值
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corners_reshaped[:, column_index] = fixed_value - corners_reshaped[:, column_index]
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print(corners_reshaped)
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return corners_reshaped
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def fun_test(x,cls,corners):
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print("标定开始")
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# print(corners)
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error = 0
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error_y = 0
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error_x = 0
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model = cls()
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f = model.f
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H = model.H - 9
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gamma = math.atan(1 / (math.tan(x[0]) * math.tan(x[1])))
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seta = math.atan(1 / math.sqrt(pow(math.tan(x[1]), 2) + 1 / pow(math.tan(x[0]), 2)))
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column = 0
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k = 0
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k1 = 0
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for index, value in enumerate(corners):
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if index % 11 == 10:
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column += 1
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index += 1
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k += 1
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k1 = 0
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continue
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k1 += 1
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Xw, Yw = calc_way.calc_distance(value[0], value[1], x[0], x[1])
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Xw1, Yw1 = calc_way.calc_distance(corners[index+1][0], corners[index+1][1], x[0], x[1])
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print(f"第{index}个点")
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print(f"Xw: {Xw}, Yw: {Yw}")
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print(f"Xw1: {Xw1}, Yw1: {Yw1}")
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d2 = math.sqrt((Xw1 - Xw) ** 2 + (Yw1 - Yw) ** 2)
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print(f"两点距离为：{d2:.2f}")
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error = error + abs(d2 - 60)
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d_y = abs(570-60*k-77+Yw)
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error_y = error_y + d_y
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d_x = abs(488 + 760-60*k-Xw )
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error_x = error_x + d_x
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print(f"平均误差为：{error/80:.2f}")
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print(f"errpr_y:{error/80:.2f}")
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return error/80 + error_y/80 + error_x/80
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def get_result_test(cls,corners):
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params = cls,corners
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bounds = [(0.1, 1.7), (0.1, 1.7)]
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result = minimize(
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fun_test,
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x0=[0.7, 0.9],
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args=params,
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# method='Nelder-Mead', # 或 'trust-constr'
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method='L-BFGS-B', bounds=bounds,
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tol=1e-6, # 高精度容差
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options={'gtol': 1e-6, 'maxiter': 1000}
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)
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return result
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def undistort_image(image_path, camera_matrix, dist_coeffs):
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# 读取图像
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img = cv2.imread(image_path)
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# 获取图像尺寸
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h, w = img.shape[:2]
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# 优化相机矩阵
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new_camera_matrix, roi = cv2.getOptimalNewCameraMatrix(
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camera_matrix, dist_coeffs, (w, h), 1, (w, h))
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# 使用undistort
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dst = cv2.undistort(img, camera_matrix, dist_coeffs, None, new_camera_matrix)
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# 裁剪图像(使用roi)
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x, y, w, h = roi
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dst = dst[y:y + h, x:x + w]
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return dst
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# 示例使用
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# 假设你已经通过相机标定获得了相机矩阵和畸变系数
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# result = calibrate(r"C:\Users\Administrator\Desktop\BYD\20250711\*.jpg",11,8,60)
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# camera_matrix = result[0]
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# dist_coeffs = result[1]
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# corrected_img = undistort_image(r"C:\Users\Administrator\Desktop\BYD\20250711\frame_2100_3.jpg", camera_matrix, dist_coeffs)
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# cv2.imwrite("corrected.jpg", corrected_img)
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# result = get_result_test(model.Model,find_corners("corrected.jpg",11,8))
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# print(result)
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# find_corners("corrected.jpg",11,8)
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# x_zeros,y_zeros = calc_way.calc_zeros_yto0(-90)
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# print(x_zeros,y_zeros)
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# # 读取图像
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# img = cv2.imread("corrected.jpg")
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#
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# # 定义两点坐标
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# pt1 = (int(x_zeros[0]), int(960-y_zeros[0]))
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# pt2 = (int(x_zeros[-1]), int(960-y_zeros[-1]))
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#
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# # 画红色线条，粗细为3
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# cv2.line(img, pt1, pt2, (0, 0, 255), 3)
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#
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# # 保存结果
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# cv2.imwrite("output.jpg", img) |
