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EDLines 快速直线检测算子
EDLines是一种快速直线检测算子,2012年在ICCV上提出,也是目前处理直线检测最快的算法之一,该算法包含三个步骤:(1)边缘提取:利用Edge Drawing (ED)算法[28,29]从灰度图像中提取边缘片段;(2)线段检测:利用最小二乘法提取直线段;(3)线段确认:遵循Helmholtz定律,从已提取的直线段中摒弃虚假线段。EDLines算法的优越性得益于Edge Drawing (ED)算法能够从灰度图像中准确、快速、稳定地提取出光滑、完整的边缘片段。Edge Drawing (ED)算法包含以下步骤:
(1)采用size=5*5,σ=1的高斯核对灰度图像进行平滑滤波,去除噪声;
(2)采用一种常用的梯度算子,如Prewitt、Sobel或Scharr等计算平滑后图像中每个像素点的梯度幅度和梯度方向;
(3)将梯度图中邻域内幅度最大的像素点标记为锚点,这些锚点成为图像边缘点(edge elements)的概率很大;
(4)将相邻的锚点连接成边缘线。从一个锚点起始,ED利用相邻像素的梯度幅度和方向在梯度为最大值的锚点之间游走。
(Edge Drawing (ED) is our recently-proposed, novel, fast edge detection algorithm. What makes ED stand out
the existing edge detectors, e.g., Canny, is the following: While the other edge detectors give out a binary
edge image as output, where the etected edge pixels are usually independent, discontinuous entities ED produces a
set of edge segments, which are clean, contiguous, i.e., connected, chains of edge pixels. Thus, while the output of
the other edge detectors requires urther processing to generate potential object boundaries, which may not even be
possible or result in inaccuracies ED not only produces perfectly connected object boundaries by default, but it also achieves this in blazing speed compared to other edge detector.)
- 2021-03-22 16:29:16下载
- 积分:1
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Graphics
一个集成的图形界面的程序,可调用每一次作业子程序。
一、调用画点的函数,用DDA、中点算法画直线和中点算法画圆和椭圆。
二、多边形扫描转换算法和区域填充算法实现(扫描线算法为必做,基于求余运算的边缘填充和边标志算法为任选;基于种子的区域填充采用4连通区域的递归种子填充算法,或扫描线种子填充算法,要求种子点(x,y)可交互输入)。
三、线段裁剪和多边形裁剪算法的动画演示实现。(两种线段裁剪算法和H-S多边形逐边裁剪算法)多边形裁剪算法的动画演示要求先画出一个封闭的多边形,再画矩形的裁剪窗口,然后选择裁剪按钮(或命令),按下“上边裁剪”按钮(或执行“上边裁剪”命令),多边形相对裁剪窗口的上边进行裁剪,显示上边裁剪后的多边形,依此进行其它各边裁剪。
四、用动画实现二维图形变换的各种算法,实现对指定形体的平移、旋转和缩放。(包括类似自行车行走和绕固定点旋转的自旋转物体动画。)
五、简单三维图形系统:凸多面体的建模、透视投影,隐藏面的消除及基本图形变换(平移、旋转、缩放)。
六、交互式Bezier曲线的输入绘制程序实现
(An integrated graphical interface of the program, each operation subroutine callable.
One call a function of the point of the painting, with the DDA, the midpoint algorithm for drawing a straight line and the midpoint algorithm circle and oval.
Second, the polygon scan conversion algorithm and region filling algorithm (scan line algorithm for must fill and edge flag algorithm based on the edge of the modulo operator is optional using the 4 regional connectivity recursive seed filling algorithm based on the area of seed filling, or scan line seed filling algorithm requires the seed point (x, y) can be entered interactively).
Line Clipping polygon clipping algorithm animation achieved. (Two Line Clipping Algorithm and HS polygon-by-side clipping algorithm) polygon clipping algorithm animation requires draw a closed polygon, rectangle and then draw the crop window, and then select the the cropped button (or command), press the "on top of cutting "button (or the implementation of)
- 2020-06-30 08:20:02下载
- 积分:1
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SiftSearch
基于Sift算法开发商标图案匹配程序,(1)各个CBIR模块及其技术;
(2)Sift算法及其在图像匹配、目标识别中的应用;
(3)Sift算法在图像检索中的应用。
(Sift algorithm development based on pattern matching program mark (1) Each CBIR module and its technology (2) Sift algorithm and its application in image matching, object recognition application (3) Sift algorithm in image retrieval applications.)
- 2009-09-28 12:03:28下载
- 积分:1
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Lagrange
对lagrange函数公式进行代码化,可以对一组数进行插值算法,可以输出最后的y值(The lagrange function formula code, a number of groups interpolation algorithm, you can output the final value of y)
- 2012-10-23 13:53:57下载
- 积分:1
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Detection_of_Motion_Picture_trajectory_tracking
VC++,DirectX,运动图像检测,运动轨迹跟踪(VC++, DirectX movement trajectory tracking image detection)
- 2020-10-23 17:07:22下载
- 积分:1
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kmeans
kmeans算法实现,对图像处理。亲自使用过,可用,供参考。(Kmeans algorithm for image processing.)
- 2013-10-17 10:57:41下载
- 积分:1
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secaizhuanyi
运用openCV编写的C++图像色彩转移程序,原理是先转化到Lab图像,再保持L不变调整图像的a、b分量的均值跟方差。(Using openCV prepared C++ image color transfer process, the principle is first converted to Lab image, and then adjust the image to keep L constant a, b, with the mean variance component.)
- 2013-09-15 16:40:26下载
- 积分:1
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meanshift
meanshift算法,及其在图像处理方面的应用(meanshift algorithm)
- 2011-10-10 08:23:48下载
- 积分:1
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RRT-path-panning-algorithm
本文以自主驾驶车辆为实际应用背景.提出了一种改进的RRT(快速随机搜索树)路径规划算法.该路
径规划算法将非完整性约束条件与双向多步扩展RRT搜索算法相结合,在提高搜索效率的同时保证了规划路径的可
行性.同时将路径点作为B样条基函数的控制点,用三次B样条函数来拟合控制点生成平滑可跟踪的路径.通过在平
面障碍物环境下实验,验证了该算法的有效性.(AimingattheapplicationofALV(automaticlandvehicle),animprovedRRT(RapidlyRandom?exploring
Trees)pathplanningalgorithm isproposed.Thealgorithm combinesthenoholonomicconstraintsofvehiclewithdoubleextend
RRTs,whichnotonlyimprovestheefficiencyofsearchingbutalsoguaranteesthefeasibilityofthepathatthesametime.Thepath
pointsaretakenasreferencepointsfortheB?splinebasicfunction,approachandcreateanewsmoothroutewhichsuitsforthevehi?
cletofollow.Thesimulationoutcomesandfieldtestsverifytheeffectivenessofthemethodproposed.)
- 2012-12-01 18:39:27下载
- 积分:1
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one-based
一种基于背景减法和帧差的运动目标检测算法(Based on background subtraction and frame difference moving target detection algorithm)
- 2013-07-31 09:12:36下载
- 积分:1