Description: This paper introduces an affine invariant of trapezia, and the explicit constraint equation between the intrinsic matrix of a camera and the similarity invariants of a trapezium are established using the affine invariant. By this constraint, the inner parameters, motion parameters of the cameras and the similarity invariants of trapezia can be linearly determined using some prior knowledge on the cameras or the trapezia. The proposed algorithms have wide applicability since parallel lines are not rare in many scenes. Experimental results validate the proposed approaches. This work presents a unifying framework based on the parallelism constraint, and the previous methods based on the parallelograms or the parallelepipeds can be integrated into this framework.
Key words: invariant parallelism constraint camera calibration 3D reconstruction Platform: |
Size: 188219 |
Author:王峰 |
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Description: 针对摄像机固定和共面约束条件下进行目标定位,提出了一种简单可行的全新算法。该算法避开了烦琐的摄像机标定这一过程,也不用精确地求解单应性矩阵。只是运用射影几何的性质,通过简单的几何关系,对非标定单摄像机拍摄的单幅图像,求解其从2D图像平面到真实的3D平面的非线性单映射关系。该算法为解决计算机视觉的测量、定位、三维重建等问题,提供一种全新的思路。
-against cameras fixed and coplanar binding conditions for target location, a simple new algorithm. The algorithm avoid the cumbersome process of the camera calibration, and it does not accurately be solved single matrix. Just use projective geometry of nature, by simple geometry, orders for non-standard video camera in a single image. Solving its two D images from two-dimensional to three real plane D nonlinear single map. The algorithm to solve the measurement of computer vision, positioning, three-dimensional reconstruction, with a brand new idea. Platform: |
Size: 214016 |
Author:蒋翔俊 |
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Description: 计算机视觉是在图像处理的基础上发展起来的新兴学科。计算机视觉从信息处理的层次研究视觉信息的认知过程，研究视觉信息处理的计算理论、表达与计算方法。本书系统地介绍了计算机视觉的重要理论与算法，包括图像特征提取，摄像机定标，立体视觉，运动视觉(或称序列图像分析)，由图像灰度恢复三维物体形状的方法，物体建模与识别方法以及距离图像分析方法等。-in computer vision image processing on the basis of the development of a new subject. Computer processing of visual information from the study on the levels of visual information cognitive process, the study of visual information processing theory. Expression and calculation methods. The book systematically introduces computer vision of the important theory and algorithms, including image feature extraction, camera calibration, stereo vision, sports vision (or image sequence analysis), gray-scale images from 3D object shape, Object Modeling and Recognition and the distance between image analysis methods. Platform: |
Size: 13977600 |
Author:谢志东 |
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Description: This paper introduces an affine invariant of trapezia, and the explicit constraint equation between the intrinsic matrix of a camera and the similarity invariants of a trapezium are established using the affine invariant. By this constraint, the inner parameters, motion parameters of the cameras and the similarity invariants of trapezia can be linearly determined using some prior knowledge on the cameras or the trapezia. The proposed algorithms have wide applicability since parallel lines are not rare in many scenes. Experimental results validate the proposed approaches. This work presents a unifying framework based on the parallelism constraint, and the previous methods based on the parallelograms or the parallelepipeds can be integrated into this framework.
Key words: invariant parallelism constraint camera calibration 3D reconstruction Platform: |
Size: 188416 |
Author:王峰 |
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Description: 一篇关于三维重建的硕士论文。内容涉及了摄像机标定、图像匹配以及三维重建等-An article on the three-dimensional reconstruction of the master s thesis. Covering the camera calibration, image matching, as well as three-dimensional reconstruction Platform: |
Size: 4144128 |
Author:JJ |
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Description: 对摄象机参数进行标定，然后利用图像进行距离测量-The camera calibration parameters, and then use the image distance measurement Platform: |
Size: 897024 |
Author:fangshuai |
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Description: 深入浅出介绍计算机视觉的最新动态。内容包括：
* Camera calibration using 3D objects, 2D planes, 1D lines, and self-calibration
* Extracting camera motion and scene structure from image sequences
* Robust regression for model fitting using M-estimators, RANSAC, and Hough transforms
* Image-based lighting for illuminating scenes and objects with real-world light images
* Content-based image retrieval, covering queries, representation, indexing, search, learning, and more
* Face detection, alignment, and recognition--with new solutions for key challenges
* Perceptual interfaces for integrating vision, speech, and haptic modalities
* Development with the Open Source Computer Vision Library (OpenCV)
* The new SAI framework and patterns for architecting computer vision applications-Easy to introduce the latest developments in computer vision. Include:* Camera calibration using 3D objects, 2D planes, 1D lines, and self-calibration* Extracting camera motion and scene structure from image sequences* Robust regression for model fitting using M-estimators, RANSAC, and Hough transforms* Image-based lighting for illuminating scenes and objects with real-world light images* Content-based image retrieval, covering queries, representation, indexing, search, learning, and more* Face detection, alignment, and recognition- with new solutions for key challenges* Perceptual interfaces for integrating vision, speech, and haptic modalities* Development with the Open Source Computer Vision Library (OpenCV)* The new SAI framework and patterns for architecting computer vision applications Platform: |
Size: 12191744 |
Author:kankan |
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Description: 利用透镜成像理论建立摄像机数学模型,
提出了一种线性求解摄像机内外参数的方法。该方
法特点是采用主动发光的光点阵列标定靶,利用2D
标定靶的精确移动来实现基于3D 立体靶标的摄像
机标定的算法。-Lens imaging theory using mathematical models set up the camera, a camera inside and outside the parameters for solving linear approach. The method is characterized by active light-emitting points of light array calibration target, the use of 2D calibration target to achieve the precise mobile target based on stereo 3D camera calibration algorithms. Platform: |
Size: 121856 |
Author:刘镖峰 |
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Description: 系统采用的是直接标定摄像机内部参数的算法，算法借助于标定参照物直接计算摄像机的内参数。整个系统是在VC++环境下设
计并实现的，并借助了IPL和OpenCV的帮助，只要输入标定物的图像，系统就可以迅速而又准确地输出摄像机内参数的结果。通过3D
重构实验证明了该系统的有效性。相对于MATLAB实现方式，该系统使用更加方便、快捷。
-System are directly used in the internal parameters of the camera calibration algorithm, calibration algorithm by means of direct calculation of reference within the parameters of the camera. The entire system is in VC++ environment to design and implementation, and with the help of IPL and OpenCV, as long as the input image calibration objects, the system can be output quickly and accurately the results of camera intrinsic parameters. Through the 3D reconstruction of the experiment proved the effectiveness of the system. MATLAB implementation vis-à-vis the way the system more convenient to use, fast. Platform: |
Size: 106496 |
Author:wangtao |
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Description: 针对双目立体视觉系统研制过程中的摄像机标定步骤,分析了计算机视觉函数库OpenCV中的摄像机模型,其
中的非线性畸变考虑到了切向畸变和径向畸变,采用Bouguet角点提取算法,实现了基于OpenCV的摄像机标定.该
算法具有很高的标定精度和计算效率、良好的跨平台移植性,可以满足双目立体视觉系统的需要.
-System are directly used in the internal parameters of the camera calibration algorithm, calibration algorithm by means of direct calculation of reference within the parameters of the camera. The entire system is in VC++ environment to design and implementation, and with the help of IPL and OpenCV, as long as the input image calibration objects, the system can be output quickly and accurately the results of camera intrinsic parameters. Through the 3D reconstruction of the experiment proved the effectiveness of the system. MATLAB implementation vis-à-vis the way the system more convenient to use, fast. Platform: |
Size: 41984 |
Author:wangtao |
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Description: 针对双目立体视觉系统研制过程中的摄像机标定步骤,分析了计算机视觉函数库OpenCV中的摄像机模型,其
中的非线性畸变考虑到了切向畸变和径向畸变,采用Bouguet角点提取算法,实现了基于OpenCV的摄像机标定.该
算法具有很高的标定精度和计算效率、良好的跨平台移植性,可以满足双目立体视觉系统的需要.
-System are directly used in the internal parameters of the camera calibration algorithm, calibration algorithm by means of direct calculation of reference within the parameters of the camera. The entire system is in VC++ environment to design and implementation, and with the help of IPL and OpenCV, as long as the input image calibration objects, the system can be output quickly and accurately the results of camera intrinsic parameters. Through the 3D reconstruction of the experiment proved the effectiveness of the system. MATLAB implementation vis-à-vis the way the system more convenient to use, fast. Platform: |
Size: 41984 |
Author:wangtao |
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Description: Program that finds the 16 green dots in a 3d grid for camera calibration and assossiotes with the metric measures in a txt file, for later use in calibration procedure Platform: |
Size: 20677632 |
Author:Guilherme |
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Description: Corner detection for camera calibration using a 3D calibration object. To get corners one must to define a 6point ROI. The corners will be detected inside ROI and will be put into a vector. Platform: |
Size: 6144 |
Author:sully2001 |
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Description: 首先自制一张标定图片，用A4纸打印出来，设定距离，再设定标定棋盘的格子数目，如8×6，然后利用cvFindChessboardCorners找到棋盘在摄像头中的2D位置，这里cvFindChessboardCorners不太稳定，有时不能工作，也许需要图像增强处理。
计算实际的距离，应该是3D的距离。我设定为21.6毫米，既在A4纸上为两厘米。
再用cvCalibrateCamera2计算内参，
最后用cvUndistort2纠正图像的变形。
-First, a self-calibration picture, with A4 paper, print it out, set the distance, then set the calibration number of the board of the lattice, such as 8 × 6, and then use cvFindChessboardCorners find the board in the position of the camera in 2D, where cvFindChessboardCorners less stable, sometimes does not work, may need to image enhancement. Calculate the actual distance, the distance should be 3D. I set 21.6 mm, both in the A4 paper to two centimeters. Then cvCalibrateCamera2 calculated internal reference, and finally with cvUndistort2 correct the distortion. Platform: |
Size: 8192 |
Author:高东旭 |
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Description: 摄像机标定，基于三角法点的三维重建，opencv2.3.1-camera calibration, 3D reconstruction of point based on triangle method Platform: |
Size: 7168 |
Author:hlying |
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Search - camera calibration 3D