Detect the edge and mesaure the distance measurement of jet?
2 views (last 30 days)
Show older comments
Hi, i have high speed images of a jet, now i need to measure its penetration. Since i am a beginner with matlab therefore needed help to measure it. There is a jet with an angle. I need to detect the jet edge and to measure it distance (horizontal) from the origin.
% code clear all
mmPerPixel = 0.101;
Img=imread('C00018.tif');
[rows, columns, numberOfColorChannels] = size(Img);
pixelsPermm = 25 / mmPerPixel;
x1 = 15; % Starting column.
x2 = x1 + pixelsPermm;
y = round(0.9 * rows);
edge_r=edge(Img,'Roberts');
figure(1);imshow(Img, [0 2500]);
figure(2); imshow(edge_r);
line([x1, x2], [y, y], 'Color', 'r', 'LineWidth', 3);
text(x1, y-20, '25 cm', 'Color', 'r', 'FontSize', 20);
after using the code, i can see the horizontal length of the jet but i dont have its numerical value. I need to measure it till the edge. Needed help with detection. I dont know much about the edge command and its value. or may be i am using the wrong function. Help will be really appreciated.
0 Comments
Answers (1)
Dimitris Iliou
on 14 Jul 2017
There is a relevant MATLAB Answers post that might be of help. It talks about finding the length of an object in an image.
0 Comments
See Also
Categories
Find more on Image Processing Toolbox in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!