2025-02-27 17:31:43 +08:00
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import json
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import logging
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import cv2
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2025-03-02 16:25:35 +08:00
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def re_cal_point(point, offset):
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2025-03-02 20:49:58 +08:00
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"""
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根据裁剪之后的图片,每个点的坐标需要重新计算,以新的图片的宽高作为坐标系
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"""
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2025-02-28 15:15:33 +08:00
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# 相当于所有的x坐标向左平移了offset个距离
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point['x'] = point['x'] - offset
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2025-02-27 17:31:43 +08:00
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2025-02-28 15:15:33 +08:00
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2025-03-02 16:25:35 +08:00
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def filter_rectangle(image_path, points, wide_cam_left_cut_rate, wide_cam_right_cut_rate):
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2025-03-02 20:49:58 +08:00
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"""
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根据左右裁剪之后的图像,过滤矩形。在裁剪之后,整个矩形已经不在图片里面的,就去掉。
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1 高度过大的不要
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2 整个矩形全部身体都在裁剪区域之外的不要
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image_path:图片路径
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points:要过滤的点
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wide_cam_left_cut_rate:# 左边界的裁剪比例,从左边开始裁剪百分之多少
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wide_cam_right_cut_rate # 右边界的裁剪比例,从右边开始裁剪百分之多少
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返回值:
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1 过滤之后的矩形
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2 裁剪之后的图片
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"""
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2025-02-28 15:15:33 +08:00
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# 高度过大矩形过滤参数
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max_height_rate = 0.5 # 矩形高度占整个画面高度的最大比例,如果超过该比例,则认为是无效矩形
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2025-02-27 17:31:43 +08:00
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image = cv2.imread(image_path)
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2025-03-02 16:25:35 +08:00
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image_height = image.shape[0] # 获取图片高度
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image_width = image.shape[1] # 获取图片宽度
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image_x_min = int(image_width * wide_cam_left_cut_rate) # 左边界的裁剪点
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image_x_max = int(image_width * (1 - wide_cam_right_cut_rate)) # 右边界的裁剪点
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2025-02-27 17:31:43 +08:00
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2025-03-02 16:25:35 +08:00
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# 开始过滤矩形
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bad_point_index = []
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print(f'开始过滤矩形,原有矩形数为{len(points)}')
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for index in range(len(points)):
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point = points[index]
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2025-02-27 17:31:43 +08:00
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# 高度过大过滤
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if point['height'] > image_height * max_height_rate:
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bad_point_index.append(index)
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continue
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2025-02-28 15:15:33 +08:00
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# x坐标范围过滤,整个矩形全部身体都在裁剪区域之外的不要
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2025-03-02 16:25:35 +08:00
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x_min = point['x'] # 矩形四个矩形坐标中x的最小值
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x_max = point['x'] + point['width'] # 矩形四个矩形坐标中x的最大值
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2025-02-28 15:15:33 +08:00
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# 如果矩形x的 最大值 小于 左边界,去除这个矩形
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if x_max < image_x_min:
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bad_point_index.append(index)
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continue
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2025-02-28 15:15:33 +08:00
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# 如果矩形x的 最小值 大于 右边界,去除这个矩形
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if x_min > image_x_max:
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2025-02-27 17:31:43 +08:00
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bad_point_index.append(index)
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continue
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2025-02-28 15:15:33 +08:00
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# 过滤,只保留有效矩形
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filtered_points = []
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for i, point in enumerate(points):
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# 如果当前矩形的索引在bad_point_index中,则去除这个矩形
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if i not in bad_point_index:
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# 重新计算点的坐标
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re_cal_point(point, image_x_min)
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# 塞入结果
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filtered_points.append(point)
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print(f'过滤矩形结束,过滤之后的矩形数为{len(filtered_points)}')
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# 图片裁剪
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# 裁剪图片 (height方向不变,宽度方向裁剪)
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cropped_image = image[:, image_x_min:image_x_max]
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# 展示
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# cv2.imshow("cropped_image", cropped_image)
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# cv2.imshow("image", image)
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# for i in range(len(filtered_points)):
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# p = filtered_points[i]
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# cv2.rectangle(cropped_image, (p['x'], p['y']), (p['x'] + p['width'], p['y'] + p['height']), (0, 0, 255), 2)
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# # 写编号
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# cv2.putText(cropped_image, str(i), (p['x'], p['y']), cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0, 0, 255), 2)
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# cv2.imshow("cropped_image_draw", cropped_image)
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# cv2.waitKey(0)
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return filtered_points, cropped_image
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2025-02-27 17:31:43 +08:00
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2025-03-02 16:25:35 +08:00
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def get_hd_cam_rect(wide_cam_left_cut_rate):
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"""
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获取高清相机的视场矩形在广角相机里面的坐标。cv2下的图片坐标系,以左上角为坐标原点
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wide_cam_left_cut_rate:# 广角相机,左边界的裁剪比例,从左边开始裁剪百分之多少
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"""
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2025-03-02 16:25:35 +08:00
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# 下面参数是几乎标准无偏差的高清相机在广角相机里面的视场角矩形 广角为640x480
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x = 128
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y = 140
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w = 312
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h = 234
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# 按照k比例放大,因为高清在bim图上面定位的区域不一定是准确的,可能比广角的原宽度要小。 所以适当放大高清相机的矩形框,
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# 广角左边右边,裁剪之前,放大之后的矩形框
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k = 0
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width_scale_pixel = k * w
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height_scale_pixel = k * h
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scale_x = x - width_scale_pixel
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scale_y = y - height_scale_pixel
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scale_w = w + 2 * width_scale_pixel
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scale_h = h + 2 * height_scale_pixel
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# 广角裁剪之后,高清矩形在新的广角图片里面的坐标。
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original_wide_cam_image_width = 640 # 原本广角图片的宽度
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cut_image_x_min = int(original_wide_cam_image_width * wide_cam_left_cut_rate) # 左边界的裁剪点
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scale_x = scale_x - cut_image_x_min # 因为只是左右裁剪,只影响左上角坐标的x值
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return int(scale_x), int(scale_y), int(scale_w), int(scale_h)
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2025-03-02 20:49:58 +08:00
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def get_hd_roi_from_txt(file_path):
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"""
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读取本地文件,解析ROI矩形坐标。
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每八行为一个ROI矩形坐标,每两行为x,y,顺序为左上、右上、右下、左下(顺时针)。
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Args:
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file_path (str): 文件路径
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Returns:
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list:数组格式,第一层是全部都矩形,第二次是每个矩形的全部的坐标,第三层是每个坐标都x,y
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[
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[[x1, y1], [x2, y2], [x3, y3], [x4, y4]],
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[[x1, y1], [x2, y2], [x3, y3], [x4, y4]],
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]
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"""
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roi_list = []
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try:
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with open(file_path, 'r') as f:
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lines = f.readlines()
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# 确保行数是8的倍数
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if len(lines) % 8 != 0:
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raise ValueError("文件格式错误,行数不是8的倍数")
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for i in range(0, len(lines), 8):
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roi = []
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for j in range(0, 8, 2):
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x = float(lines[i + j].strip())
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y = float(lines[i + j + 1].strip())
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roi.append([x, y])
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roi_list.append(roi)
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except FileNotFoundError:
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print(f"文件未找到: {file_path}")
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except ValueError as e:
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print(f"数据格式错误: {e}")
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except Exception as e:
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print(f"发生未知错误: {e}")
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return roi_list
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# 测试 get_hd_rou_from_txt
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# rois = get_hd_roi_from_txt("data_sub/test_1/roi_conners.txt")
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# print(rois[0])
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# sub_im = cv2.imread("data_sub/test_1/output.jpg")
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# for roi in rois:
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# cv2.rectangle(sub_im, (int(roi[0][0]), int(roi[0][1])), (int(roi[2][0]), int(roi[2][1])), (0, 0, 255), 100)
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# # 图片缩小展示
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# sub_im = cv2.resize(sub_im, (int(sub_im.shape[1]/12), int(sub_im.shape[0]/12)))
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# cv2.imshow("sub_im", sub_im)
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# cv2.waitKey(0)
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# 测试filter_rectangle
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# def read_from_json(file_path):
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# with open(file_path, 'r') as f:
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# loaded_array = json.load(f)
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# return loaded_array
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# cnts = read_from_json("data_sub/test_1/data_sub.json")
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# filter_rectangle("data_sub/test_1/wide_image.png",cnts)
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