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Find world co-ordinates of the 4 red points in the image

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MJ Thangaraj
MJ Thangaraj 2016-4-1
评论： Image Analyst 2016-4-23
Need to find the co-ordinates of red points,For geometric Features
Tried using edge detection and [x,y] plot Thought someone could help

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回答（2 个）

KSSV
KSSV 2016-4-1
clc; clear all ;
data = imread('Road-Closeup-2104957.jpg') ;
% image([0 1], [0 1],data); % Fix the axis
imshow(data) ;
title('select the red dots') ;
coor = ginput(4) ;
hold on
plot(coor(:,1),coor(:,2),'*w') ;
wont this work? You may fix the axis if you want.
Image Analyst
Image Analyst 2016-4-1
My attached spatial calibration demo may help.
But you're probably going to need the camera calibration capabilities of the Computer Vision System Toolbox: http://www.mathworks.com/products/computer-vision/features.html#camera-calibration

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