How to detect the limits of the road?

I did a project for detecting the street and want to know how to detect the limits of asphalt, left and right, from the midpoint.

Original Photo

Binary Photo

[John D'Errico]

But this is your project after all. You need to do the work. If your question is to be given a general scheme to follow for your project, then your question is off-topic on answers, as it is then not about MATLAB.

[bogdan bogdan]

I need an answer to my question that I do not know how to respond. After all what's your problem?

[Ayushman]

Fight Fight Fight!

Answer 1

[John BG]

Hi Bogdan

just answered a similar question

A(find(A>125))=255; A(find(A<=125))=0;      % basic image clean-up converting to binary map
A(:,:,2)=and(A(:,:,2),A(:,:,3));A(:,:,3)=[];
A=and(A(:,:,1),A(:,:,2));
A=logical(~A);                 
% figure(1);imshow(A)

A2=del2(A)
figure(3);imshow(A2)

If you find this answer of any help solving your question,

please click on the thumbs-up vote link, or mark it as accepted answer

thanks in advance

John

[e-mail]

[bogdan bogdan]

That I did, but I do not know how to go N spaces above the bottom, from the middle, then go left and right, until the end where the streets and show them in a line

[Image Analyst]

To get a line N rows up from the bottom do

lineN = binaryImage(end-N+1, :);

Get the midpoint

[rows, columns] = size(binaryImage);
midPoint = round(columns/2)

Find the first one after the middle

rightIndex = find(lineN(midPoint:end), 1, 'first') + midPoint;

% Now find it on the right side

leftIndex = find(lineN(1:midPoint), 1, 'last');

Be sure to check if the indexes are empty indicating that no white pixel was found on that half!!!

[John BG]

do you mean you just want to catch left and right points where road lines hit the image frame?

[John BG]

would you like to rotate the image to align the points where road lines hit image frame?

[John BG]

Bogdan

Here Image Analyst deserves and accepted answer, or tell what is left or wrong.

[Jan]

And after this comment, John BG has accepted his own answer now, but it is not clear, if it is useful for the Bogdan.

[Anas Al-Shaghouri]

Hello

Can you help me in this.

This command is not running:

A2=del2(A);

And giving me this error:

"Error using zeros

CLASSNAME input must be a valid numeric class name.

Error in del2 (line 43)

v = zeros(size(f),class(f));"

[Image Analyst]

Anas, I think you posted this in the wrong place. It doesn't seem to have anything to do with anything on this page. But the line of code seems to be saying that f is not one of the standard MATLAB classes. It's probably some special variable that you defined, like a class or something.

Answer 2

[Image Analyst]

Pick one of the many papers on the subject here: http://www.visionbib.com/bibliography/contentsactive.html#Active%20Vision,%20Camera%20Calibration,%20Mobile%20Robots,%20Navigation,%20Road%20Following Then code it up.