单目及双目代码.zip

上传者: epic_Lin | 上传时间: 2025-11-18 11:23:19 | 文件大小: 28.78MB | 文件类型: ZIP
单目和双目视觉是计算机视觉领域中的两个关键概念,主要应用于机器人导航、自动驾驶、3D重建、虚拟现实等多个场景。下面将详细解释这两个概念及其相关的编程实现。 单目视觉(Monocular Vision): 单目视觉是指仅使用一个摄像头来获取图像,并通过图像处理和计算技术来恢复场景的几何信息,例如深度、距离或三维结构。这种方法的主要挑战在于从二维图像中推断三维信息,通常依赖于图像特征检测、匹配和几何约束。 1. 图像特征检测:如SIFT(尺度不变特征变换)、SURF(加速稳健特征)、ORB(Oriented FAST and Rotated BRIEF)等,用于识别图像中的关键点。 2. 特征匹配:找到不同图像之间对应的关键点,如BFMatcher(Brute-Force Matcher)或FLANN(Fast Library for Approximate Nearest Neighbors)。 3. 相机模型:理解相机的内在参数(焦距、主点坐标、畸变系数)和外在参数(位置、方向),使用针孔相机模型进行坐标转换。 4. 单目深度估计:基于运动分析(光流法)、结构从运动(Structure from Motion, SfM)或深度学习方法。 双目视觉(Binocular Vision): 双目视觉利用两个相机同时捕捉同一场景的不同视角图像,通过视差计算来恢复场景的三维信息。这种方法基于人眼观察世界的原理,比单目视觉提供更准确的深度信息。 1. 左右图像配对:确定对应图像对,通常需要对齐和同步两台相机。 2. 坐标对齐:确保左右图像的坐标系统一致,以便进行后续的匹配和计算。 3. 双目立体匹配:寻找左图和右图中对应点的像素差异(即视差),常用算法有SAD(Sum of Absolute Differences)、SSD(Sum of Squared Differences)以及半全局匹配(Semi-Global Matching, SGM)。 4. 深度映射:根据视差图和相机参数计算每个像素的深度值,构建深度图。 5. 3D重建:有了深度信息后,可以结合相机位置重建出场景的3D模型。 在编程实现中,OpenCV是一个广泛使用的开源库,提供了大量单目和双目视觉的函数与算法。例如,`cv::calcOpticalFlowFarneback`用于光流计算,`cv::StereoBM`和`cv::StereoSGBM`用于双目立体匹配,`cv::triangulatePoints`用于从二维投影点反求三维点等。此外,深度学习方法,如使用CNN(卷积神经网络)进行特征匹配和深度估计,也是近年来的研究热点,如学习立体匹配网络(Learning to Disparity, LDDM)和Deep Stereo Network(DSN)等。 单目视觉和双目视觉在计算机视觉中扮演着重要角色,涉及图像处理、几何重建和机器学习等多个领域的知识。理解和掌握这些技术,对于开发高级的计算机视觉应用至关重要。

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