Search - 3D to image plane

Search - 3D to image plane - List

[Special Effects] photomachinenewalgorithm DL : 1: 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.
Update : 2008-10-13 Size : 209.71kb Publisher : 蒋翔俊
[Special Effects] 3D_Deconvolution DL : 0: When looking at a three-dimensional (3D) specimen through a transmitted brightfield optical microscope, only the part of the specimen contained in the focal plane appears sharp while the remainder looks smooth. The deconvolution task consists in deblurring the observed image in order to recover the original shapes of the object. Although 2D deconvolution softwares are available freely, the 3D consideration gives rise to many problems leading to the impossibility to recover the original images without any assumptions. Moreover some noise is added to the signal, it has been considered as a white Gaussian noise.
Update : 2008-10-13 Size : 71.78kb Publisher : 薛斌
[Special Effects] photomachinenewalgorithm DL : 0: 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.
Update : 2025-02-17 Size : 209kb Publisher : 蒋翔俊
[Special Effects] 3D_Deconvolution DL : 0: When looking at a three-dimensional (3D) specimen through a transmitted brightfield optical microscope, only the part of the specimen contained in the focal plane appears sharp while the remainder looks smooth. The deconvolution task consists in deblurring the observed image in order to recover the original shapes of the object. Although 2D deconvolution softwares are available freely, the 3D consideration gives rise to many problems leading to the impossibility to recover the original images without any assumptions. Moreover some noise is added to the signal, it has been considered as a white Gaussian noise.
Update : 2025-02-17 Size : 71kb Publisher : 薛斌
[Windows Develop] voxel_src DL : 0: project a set of 3D points onto a 2D image plane and then convert them into pixel coordinates.
Update : 2025-02-17 Size : 4kb Publisher : deadmaurice
[Other] tangent_plane DL : 0: 在MATLAB7.0中，实现在三维数据中，插入斜面-using MATLAB7.0, show the plane in 3D image
Update : 2025-02-17 Size : 5kb Publisher : feiyang
[Other] Robust_car_tracking_using_Kalman_Filtering DL : 0: We present a real-time model-based vision approach for detecting and tracking vehicles from a moving platform. It was developed in the context of the CMU Navlab project and is intended to provide the Navlabs with situational awareness in mixed trac. Tracking is done by combining a simple image processing technique with a 3D extended Kalman lter and a measurement equation that projects from the 3D model to image space. No ground plane assumption is made. The resulting system runs at frame rate or higher, and produces excellent estimates of road curvature, distance to and relative speed of a tracked vehicle. We have complemented the tracker with a novel machine learning based algorithm for car detection, the CANSS algorithm, which serves to initialize tracking
Update : 2025-02-17 Size : 378kb Publisher : zhangjianrong
[3D Graphic] CameraCalib DL : 0: Camera Calibration, Mapping a point from 3D coordinates to 2D image plane
Update : 2025-02-17 Size : 23kb Publisher : Hisham
[Software Engineering] Model-based-3D-Motion DL : 0: 为解决非刚体运动分析中模型精度和计算复杂度之间的平衡问题,该文提出了一种基于圆锥曲线模型的弹性连接体(人体)三维运动估计方法。建立了人体三维模型,根据双目图像序列进行基于该模型的人肢体三维变形和运动参数估计,采用圆锥曲线三维模型及其在图像平面上投影的联系方程估计三维运动参数。人手臂运动估计实验结果表明该运动估计算法能够正确估计人体运动参数。-To offer a good tradeoff between computational complexity and model precision in non2rigid motion analysis, a method of 3D motion estimation for elastic articulated objects (human bodies) based on the conic curves is presented. A human body 3D model is established. The 3D deformation and mo2 tion parameters based on the proposed model are estimated by a sequence of stereo images. The 3D mo2 tion parameters are estimated based on the 3D model of conic curves and the corresponding equations of its two projections in image plane. The experimental results of human arm motion estimation demonstrate that the model2based estimation method can estimate the human motion parameters properly.
Update : 2025-02-17 Size : 253kb Publisher : cp
[Software Engineering] VTK-based-on-VCPP DL : 0: 首先介绍了医学图像三维重建的面绘制与体绘制方法，讨论了两种绘制方法的思想和优缺点，对常用的Marching Cubes算法和Ray Casting算法的原理和实现过程进行了阐述，并分析了可视化工具包VTK的实现机制。在VC++6．0平台下，结合可视化工具包VTK，分别基于Marching Cubes算法和Ray Casting算法对DICOM格式的CT图像序列进行三维重建，并给出了其实现的关键算法和3D可视化结果。通过人机交互，实现对重建后三维医学图像的旋转、缩放、平移等简单的交互操作。其次，通过设置虚拟切面的法向量和内点来对重建后的三维物体进行切割并获得断面信息，并且在切割的同时可以同步显示出断面图像，进而实现了三维医学图像的任意角度断面图像提取；构造可控制的长方体，可以用鼠标控制长方体进行拉伸、缩放、平移、旋转等操作来对重建对象进行切割，实现用户对三维物体的实时交互切割；在三维空间中通过点击鼠标来获得空间点的三维坐标，实现三维空间中点的鼠标拾取，完成三维物体的空间定量测量。最终，实现对重建后三维医学图像的鼠标拾取、空间角度和距离的测量、平面切割、长方体交互切割、任意角度断面图像提取等交互操作。-Firstly，the realization and principle of Marching Cubes and Ray Casting for 3D medical image reconstruction with surface rendering and volume rendering ale discussed and contrasted in this paper．The excellence and shortage of the two rendering methods ale discussed．And the realization mechanism of visualization tool package based on VTK is analyzed．In the paper,Marching Cubes and Ray Casting algorithm ale respectively adopted to reconstruct the 3D images for the CT image sequence of the DICOM format under the VC++6.0 and the visual package VTK platform．The key algorithms and 3D visualization results are given in this paper．The simple interactive operations，such as rotation，zoom and transfer Can be realized by user interaction with PC．Secondly，the vector and inner points ale calculated to form the virtual clipping plane，which in turn is used to incise the 3D object。And the information of cross—section images is obtained，at the same time the correspondent images are displayed on the scr
Update : 2025-02-17 Size : 4.31mb Publisher : 邹春华
[Software Engineering] h264-master DL : 1: Motion estimation is the process of determining motion vectors that describe the transformation from one 2D image to another usually from adjacent frames in a video sequence. It is an ill-posed problem as the motion is in three dimensions but the images are a projection of the 3D scene onto a 2D plane. The motion vectors may relate to the whole image (global motion estimation) or specific parts, such as rectangular blocks, arbitrary shaped patches or even per pixel. The motion vectors may be represented by a translational model or many other models that can approximate the motion of a real video camera, such as rotation and translation in all three dimensions and zoom.-Motion estimation is the process of determining motion vectors that describe the transformation from one 2D image to another usually from adjacent frames in a video sequence. It is an ill-posed problem as the motion is in three dimensions but the images are a projection of the 3D scene onto a 2D plane. The motion vectors may relate to the whole image (global motion estimation) or specific parts, such as rectangular blocks, arbitrary shaped patches or even per pixel. The motion vectors may be represented by a translational model or many other models that can approximate the motion of a real video camera, such as rotation and translation in all three dimensions and zoom.
Update : 2025-02-17 Size : 341kb Publisher : doniya
[Picture Viewer] 3DPictureBrowser DL : 1: 3D图片浏览器。直接使用WPF实现的3d图片浏览器实际上是“伪3D”，通过图片的变换来实现，实际上图片本身依然还是在一个二维的平面上。这个demo里使用了WPF 3D的技术，通过对底层Mesh建模，实现了将图片贴在空间圆柱面的效果，并且实现了一个从空间圆柱面切换到空间多层平面的动画（反之亦然），并且在这2中风格下使用了不同的光照效果-3D Photo Browser. Directly implemented using WPF 3d image viewer is actually a " pseudo-3D" , by converting the image to achieve, in fact, the picture itself are still on a two-dimensional plane. This demo in WPF 3D technology used by the underlying Mesh modeling to achieve the effect of space pictures posted on the cylindrical surface, and implement a switch space to space multi-storey cylindrical surface plane animation (and vice versa) , and in the use of these two different styles of lighting effects
Update : 2025-02-17 Size : 2.66mb Publisher : da
[Special Effects] 149008204siftMatch DL : 0: 三维重构的思路很简单，用OpenGL中纹理贴图功能，将平面图像中的三角形逐个贴到计算出的三维坐标上去就可以了。为了便于观察3D效果，我还设计了交互功能：用方向键可以上下左右旋转重构的模型，用鼠标滚轮可以放大或缩小。用gluLookAt函数可以实现视点旋转的功能。三维重构的代码实现在glFuncs.cpp中。(Three-dimensional reconstruction of the idea is very simple, with OpenGL texture mapping function, the plane image of the triangle one by one to the calculated three-dimensional coordinates up on it. In order to facilitate the observation of 3D effects, I also designed the interactive function: the arrow keys can be rotated up and down around the reconstructed model, with the mouse wheel can zoom in or out. Use gluLookAt function to achieve the function of point rotation. The three-dimensional reconstructed code is implemented in glFuncs.cpp.)
Update : 2025-02-17 Size : 5.81mb Publisher : 0908