451 lines
18 KiB
Python
451 lines
18 KiB
Python
import os
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os.environ["OPENCV_VIDEOIO_MSMF_ENABLE_HW_TRANSFORMS"] = "0" # Windows 下禁用硬件加速,避免兼容性问题
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import cv2
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import orisys
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import numpy as np
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from scipy.ndimage import gaussian_filter
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def create_colorbar(min_val, max_val, height=400, width=60, colormap=cv2.COLORMAP_JET):
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"""
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创建颜色条图像,显示深度值的颜色映射尺度。
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Args:
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min_val: 最小值
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max_val: 最大值
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height: 颜色条高度(默认400)
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width: 颜色条宽度(默认60)
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colormap: OpenCV颜色映射(默认JET)
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Returns:
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np.ndarray: 包含颜色条和标签的BGR图像
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"""
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# 创建颜色条:从0到255的渐变(从底部到顶部)
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gradient = np.linspace(255, 0, height, dtype=np.uint8).reshape(-1, 1)
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gradient = np.tile(gradient, (1, width))
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colorbar = cv2.applyColorMap(gradient, colormap)
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# 添加文本标签
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font = cv2.FONT_HERSHEY_SIMPLEX
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font_scale = 0.4
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thickness = 1
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color = (255, 255, 255) # 白色文字
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# 在顶部显示最大值
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max_text = f"{max_val:.1f}"
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(text_width, text_height), _ = cv2.getTextSize(max_text, font, font_scale, thickness)
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cv2.putText(colorbar, max_text, (width - text_width - 5, text_height + 5),
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font, font_scale, color, thickness, cv2.LINE_AA)
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# 在中间显示中值
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mid_val = (min_val + max_val) / 2
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mid_text = f"{mid_val:.1f}"
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(text_width, text_height), _ = cv2.getTextSize(mid_text, font, font_scale, thickness)
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cv2.putText(colorbar, mid_text, (width - text_width - 5, height // 2 + text_height // 2),
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font, font_scale, color, thickness, cv2.LINE_AA)
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# 在底部显示最小值
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min_text = f"{min_val:.1f}"
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(text_width, text_height), _ = cv2.getTextSize(min_text, font, font_scale, thickness)
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cv2.putText(colorbar, min_text, (width - text_width - 5, height - 5),
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font, font_scale, color, thickness, cv2.LINE_AA)
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return colorbar
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def add_colorbar_to_image(image, min_val, max_val, colormap=cv2.COLORMAP_JET):
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"""
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将颜色条添加到图像右侧。
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Args:
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image: 原始图像
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min_val: 最小值
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max_val: 最大值
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colormap: OpenCV颜色映射(默认JET)
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Returns:
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np.ndarray: 添加了颜色条的图像
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"""
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h, w = image.shape[:2]
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colorbar = create_colorbar(min_val, max_val, height=h, width=60, colormap=colormap)
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# 水平拼接图像和颜色条
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combined = np.hstack([image, colorbar])
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return combined
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def estimate_depth(foe=None, flow=None, init_depth=None, min_radial_flow=0.01, T_z=1.0,
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expansion_mask=None, contraction_mask=None):
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"""
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基于FOE(扩张焦点)和光流场估计深度。
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Args:
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foe: FOE坐标,可以是:
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- (x, y) 元组或列表
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- None(如果未提供,返回零深度图)
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flow: 光流场,形状为 (H, W, 2) 的 numpy 数组,包含 u 和 v 分量
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init_depth: 初始深度值,可以是:
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- 标量:用于统一缩放深度
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- numpy数组:用于逐像素参考深度(会进行混合)
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- None:不进行缩放
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min_radial_flow: 最小径向流阈值,避免除零(默认0.01)
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T_z: 平移速度参数,用于深度计算(默认1.0)
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expansion_mask: 扩张区域掩码(可选),如果提供,只在掩码内计算深度
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contraction_mask: 收缩区域掩码(可选),如果提供,只在掩码内计算深度
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Returns:
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np.ndarray: 深度图,形状为 (H, W)
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Examples:
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# 使用FOE坐标和vnormal估计深度
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depth = estimate_depth(foe=(cx, cy), flow=vnormal, init_depth=30)
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# 使用FOE列表和掩码
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depth = estimate_depth(foe=[cx, cy], flow=vnormal, expansion_mask=expansion_mask, contraction_mask=contraction_mask)
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"""
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if flow is None:
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raise ValueError("flow parameter is required")
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H, W = flow.shape[:2]
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u, v = flow[..., 0], flow[..., 1]
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# 创建有效掩码:扩张和收缩区域的并集
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if expansion_mask is not None or contraction_mask is not None:
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if expansion_mask is not None and contraction_mask is not None:
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valid_mask = expansion_mask | contraction_mask
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elif expansion_mask is not None:
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valid_mask = expansion_mask
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else:
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valid_mask = contraction_mask
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else:
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# 如果没有提供掩码,使用全图
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valid_mask = np.ones((H, W), dtype=bool)
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# 提取FOE坐标
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if foe is None:
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# 如果没有提供FOE,返回零深度图
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return np.zeros((H, W), dtype=np.float32)
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if isinstance(foe, (tuple, list, np.ndarray)):
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if len(foe) >= 2:
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fx, fy = float(foe[0]), float(foe[1])
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else:
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raise ValueError(f"FOE coordinates must have at least 2 elements, got {len(foe)}")
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else:
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raise ValueError(f"FOE must be a tuple, list, or array, got {type(foe)}")
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# 确保FOE坐标在图像范围内
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fx = np.clip(fx, 0, W - 1)
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fy = np.clip(fy, 0, H - 1)
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# 创建坐标网格
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yy, xx = np.meshgrid(np.arange(H), np.arange(W), indexing='ij')
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# 计算从FOE到每个点的径向向量
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rx = xx - fx
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ry = yy - fy
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r = np.sqrt(rx**2 + ry**2)
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# 避免除零:在FOE点附近使用小值
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r_safe = np.maximum(r, 1.0)
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# 计算径向单位向量
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radial_unit_x = rx / r_safe
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radial_unit_y = ry / r_safe
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# 计算径向流(光流在径向方向上的投影)
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# 正值表示远离FOE,负值表示朝向FOE
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radial_flow = u * radial_unit_x + v * radial_unit_y
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# 创建掩码:FOE附近区域(半径内)
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foe_radius = 10 # FOE附近的半径(像素)
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mask_foe_region = r < foe_radius
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# 处理FOE附近区域:使用邻域的中位数径向流(更稳健)
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if np.any(mask_foe_region):
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# 创建FOE区域的扩展掩码(用于获取邻域值)
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mask_foe_extended = r < (foe_radius + 5)
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if np.any(mask_foe_extended & ~mask_foe_region):
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# 使用FOE区域外的邻域值的中位数
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neighbor_flow = radial_flow[mask_foe_extended & ~mask_foe_region]
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if len(neighbor_flow) > 0:
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radial_flow[mask_foe_region] = np.median(neighbor_flow)
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else:
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radial_flow[mask_foe_region] = 0.0
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else:
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# 如果没有邻域值,使用全局中位数
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if np.any(~mask_foe_region):
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radial_flow[mask_foe_region] = np.median(radial_flow[~mask_foe_region])
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else:
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radial_flow[mask_foe_region] = 0.0
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# 深度计算:Z = (T_z * r) / radial_flow
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# 当径向流为正(远离FOE)时,深度为正
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radial_flow_safe = np.where(
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np.abs(radial_flow) < min_radial_flow,
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np.sign(radial_flow) * min_radial_flow,
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radial_flow
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)
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# 计算相对深度(仅在有效掩码内)
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depth = np.zeros((H, W), dtype=np.float32)
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# 只在有效掩码内计算深度
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if np.any(valid_mask):
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depth_valid = (T_z * r[valid_mask]) / np.maximum(np.abs(radial_flow_safe[valid_mask]), min_radial_flow)
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depth_valid = np.abs(depth_valid) # 使用绝对值
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depth[valid_mask] = depth_valid
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# 对于掩码外的像素,设置为掩码内的最低深度值
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if np.any(valid_mask):
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min_depth_in_mask = np.min(depth[valid_mask])
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depth[~valid_mask] = min_depth_in_mask
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else:
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# 如果没有有效掩码,使用初始深度或0
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depth.fill(init_depth if init_depth is not None and np.isscalar(init_depth) else 0.0)
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# 处理FOE附近区域:使用平滑后的值
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if np.any(mask_foe_region):
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depth_smoothed = gaussian_filter(depth, sigma=2.0)
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depth[mask_foe_region] = depth_smoothed[mask_foe_region]
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# 应用高斯滤波平滑整个深度图,减少噪声和伪影
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depth = gaussian_filter(depth, sigma=1.5)
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# 缩放深度(如果提供了初始深度,只使用掩码内的值)
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if init_depth is not None:
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if np.isscalar(init_depth):
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# 统一缩放:将深度中位数缩放到init_depth(只使用掩码内的值)
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if np.any(valid_mask):
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valid_depth = depth[valid_mask & (depth > 0)]
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if len(valid_depth) > 0:
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median_depth = np.median(valid_depth)
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if median_depth > 0:
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scale = init_depth / median_depth
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depth *= scale
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elif isinstance(init_depth, np.ndarray):
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# 逐像素参考深度:计算缩放因子并混合(只使用掩码内的值)
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if init_depth.shape == depth.shape and np.any(valid_mask):
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valid_ref = valid_mask & (init_depth > 0) & (depth > 0)
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if np.any(valid_ref):
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# 计算缩放因子
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scale = np.median(init_depth[valid_ref] / depth[valid_ref])
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depth *= scale
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# 可选:与参考深度混合
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alpha = 0.3 # 混合因子
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depth = alpha * depth + (1 - alpha) * init_depth
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# 缩放后,确保掩码外的像素保持为掩码内的最低深度值
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if np.any(valid_mask):
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min_depth_in_mask = np.min(depth[valid_mask])
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depth[~valid_mask] = min_depth_in_mask
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# 后处理:处理异常值
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depth = np.nan_to_num(depth, nan=0.0, posinf=1000.0, neginf=0.0)
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# 裁剪到合理范围(使用百分位数,但只在掩码内)
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if np.any(valid_mask) and np.any(depth[valid_mask] > 0):
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p1, p99 = np.percentile(depth[valid_mask & (depth > 0)], [1, 99])
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depth = np.clip(depth, p1, p99)
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# 最终平滑:对FOE附近区域再次应用平滑,确保伪影被消除
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depth_final_smooth = gaussian_filter(depth, sigma=1.0)
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# 重新计算FOE附近掩码
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rx = xx - fx
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ry = yy - fy
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r = np.sqrt(rx**2 + ry**2)
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mask_foe_region = r < foe_radius
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# 在FOE附近区域使用更平滑的值(但只在有效掩码内)
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if np.any(mask_foe_region & valid_mask):
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depth[mask_foe_region & valid_mask] = depth_final_smooth[mask_foe_region & valid_mask]
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# 确保掩码外的像素保持为掩码内的最低深度值
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if np.any(valid_mask):
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min_depth_in_mask = np.min(depth[valid_mask])
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depth[~valid_mask] = min_depth_in_mask
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return depth.astype(np.float32)
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def main():
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# 方式1: 从视频文件读取
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# sensor = orisys.Sensor("./s1.mp4", isstitch=True, cuda=True, verbose=True)
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# 方式2: 从摄像头读取(取消注释使用)
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sensor = orisys.Sensor(0, isstitch=True, cuda=True, verbose=True)
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print("\n按 'q' 退出程序,按 'r' 重置光流追踪器")
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while True:
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# 步骤 2.1: 获取并拼接图像
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sensor.get_img()
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# 步骤 2.2: 计算形变场
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sensor.compute_deformation()
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fps, flow,vnormal, depth = sensor.read_info(
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sensor.info.FPS,
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sensor.info.VRAW,
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sensor.info.VNORMAL,
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sensor.info.DEPTH
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)
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# depth = get_depth_improved(vnormal, fps)
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arrows = orisys.util.draw_arrows(
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sensor.img.copy(), # 使用 copy() 避免修改原图
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vnormal,
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threshold=5,
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grid_spacing=10,
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arrow_scale=1.0
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)
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cv2.imshow("形变场 Deformation", arrows)
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# # 绘制深度图(热力图)
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# # 深度值缩放:中心值 30,范围 ±10(即 20-40 映射到 0-255)
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mag_img = orisys.util.draw_magnitude_map(
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sensor.img.copy(),
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vnormal,
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threshold=5,
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colormap=cv2.COLORMAP_HOT,
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downsample_factor = 1
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)
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cv2.imshow("magnitude map", mag_img)
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# 计算扩张焦点
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# foe_result = orisys.util.compute_foe(vnormal,min_magnitude=1,expansion_threshold=0.01,downsample_factor=1)
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foe_result = sensor.get_foe(multiple_foe=False, min_magnitude=1, expansion_threshold=0.01, downsample_factor=1)
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# 在图像上绘制焦点和区域
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image_with_foe = orisys.util.draw_foe(sensor.img.copy(), foe_result)
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cv2.imshow("Focus of Expansion", image_with_foe)
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divergence = foe_result['divergence_map']
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# 计算散度统计信息
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div_min = np.min(divergence)
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div_max = np.max(divergence)
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div_median = np.median(divergence)
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print(f"散度统计: min={div_min:8.4f}, median={div_median:8.4f}, max={div_max:8.4f}")
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# 归一化散度值到0-255范围(使用绝对值,然后归一化)
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div_abs = np.abs(divergence)
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if div_abs.max() > div_abs.min():
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div_normalized = ((div_abs - div_abs.min()) / (div_abs.max() - div_abs.min()) * 255).astype(np.uint8)
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else:
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div_normalized = np.zeros_like(div_abs, dtype=np.uint8)
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# 应用颜色映射(使用JET:蓝色=低散度,红色=高散度)
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divergence_colored = cv2.applyColorMap(div_normalized, cv2.COLORMAP_JET)
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# 添加颜色条显示散度尺度
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div_display_min = div_abs.min()
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div_display_max = div_abs.max()
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divergence_with_colorbar = add_colorbar_to_image(divergence_colored, div_display_min, div_display_max, cv2.COLORMAP_JET)
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cv2.imshow("divergence map", divergence_with_colorbar)
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# 检查是否找到FOE
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if 'foe_point' in foe_result and foe_result.get('is_foe_found', False):
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(cx, cy) = foe_result['foe_point']
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# 使用FOE坐标和vnormal估计深度,传入扩张和收缩掩码
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Z_rel = estimate_depth(
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foe=(cx, cy),
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flow=vnormal,
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init_depth=30,
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T_z=1.0,
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expansion_mask=foe_result.get('expansion_mask'),
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contraction_mask=foe_result.get('contraction_mask')
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)
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# 计算深度统计信息(用于颜色映射缩放)
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z_min = np.min(Z_rel)
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z_max = np.max(Z_rel)
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z_median = np.median(Z_rel)
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# 打印深度统计信息
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print(f"FPS: {fps:5.1f}, FOE: ({cx:3d}, {cy:3d})")
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print(f" 深度统计 (用于颜色映射缩放): min={z_min:8.2f}, median={z_median:8.2f}, max={z_max:8.2f}")
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# 智能颜色映射缩放:根据统计信息设置合理的显示范围
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# 如果最大值远大于中位数,说明存在异常值,使用百分位数范围
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if z_max > 5 * z_median:
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# 存在异常值:使用百分位数范围,以median为中心
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z_p1 = np.percentile(Z_rel, 1)
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z_p99 = np.percentile(Z_rel, 99)
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z_p5 = np.percentile(Z_rel, 5)
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z_p95 = np.percentile(Z_rel, 95)
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# 计算以median为中心的对称范围
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# 使用5%和95%百分位数来确定主要数据范围
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range_low = z_median - z_p5
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range_high = z_p95 - z_median
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range_symmetric = max(range_low, range_high)
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# 设置显示范围:median ± 对称范围,但不小于1%和99%百分位数
|
||
z_display_min = max(z_p1, z_median - 2 * range_symmetric)
|
||
z_display_max = min(z_p99, z_median + 2 * range_symmetric)
|
||
|
||
print(f" 使用百分位数范围 (避免异常值): [{z_display_min:8.2f}, {z_display_max:8.2f}]")
|
||
else:
|
||
# 正常范围:使用min-max
|
||
z_display_min = z_min
|
||
z_display_max = z_max
|
||
print(f" 使用完整范围: [{z_display_min:8.2f}, {z_display_max:8.2f}]")
|
||
|
||
# 裁剪深度值到显示范围并归一化
|
||
depth_clipped = np.clip(Z_rel, z_display_min, z_display_max)
|
||
depth_normalized = (depth_clipped - z_display_min) / (z_display_max - z_display_min + 1e-6)
|
||
depth_normalized = np.clip(depth_normalized, 0, 1)
|
||
|
||
# 使用JET颜色映射显示深度图(蓝色=低深度,红色=高深度)
|
||
depth_colored = cv2.applyColorMap((depth_normalized * 255).astype(np.uint8), cv2.COLORMAP_JET)
|
||
|
||
# 添加颜色条显示深度尺度
|
||
depth_with_colorbar = add_colorbar_to_image(depth_colored, z_display_min, z_display_max, cv2.COLORMAP_JET)
|
||
cv2.imshow("Depth Map", depth_with_colorbar)
|
||
else:
|
||
# 如果没有找到FOE,显示提示信息
|
||
print("No FOE found, skipping depth estimation")
|
||
# 显示一个默认的深度图
|
||
Z_rel = np.full((sensor.img.shape[0], sensor.img.shape[1]), 30.0, dtype=np.float32)
|
||
depth_colored = cv2.applyColorMap((Z_rel * 8).astype(np.uint8), cv2.COLORMAP_HOT)
|
||
|
||
# 添加颜色条
|
||
depth_with_colorbar = add_colorbar_to_image(depth_colored, 0.0, 30.0, cv2.COLORMAP_HOT)
|
||
cv2.imshow("Depth Map", depth_with_colorbar)
|
||
|
||
# 计算多个扩张焦点
|
||
# foe_result = orisys.util.compute_multiple_foe(vnormal, min_contour_area=3000,min_magnitude=1,expansion_threshold=0.001,downsample_factor=10)
|
||
|
||
# # 在图像上绘制多个焦点和区域
|
||
# image_with_foe = orisys.util.draw_multiple_foe(sensor.img.copy(), foe_result)
|
||
# cv2.imshow("Multiple FOE", image_with_foe)
|
||
|
||
# =====================================================================
|
||
# 4. 键盘控制
|
||
# =====================================================================
|
||
key = cv2.waitKey(1) & 0xFF
|
||
if key == ord("q"):
|
||
print("\n退出程序...")
|
||
break
|
||
if key == ord("r"):
|
||
# 重置光流追踪器(当追踪漂移时使用)
|
||
sensor.reset()
|
||
print("光流追踪器已重置")
|
||
|
||
# =========================================================================
|
||
# 5. 清理资源
|
||
# =========================================================================
|
||
sensor.disconnect() # 释放视频源和相关资源
|
||
cv2.destroyAllWindows()
|
||
|
||
|
||
if __name__ == '__main__':
|
||
main()
|