How to extract the plate area only from black background
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mohamed
el 3 de Ag. de 2012
Comentada: Rinku
el 31 de Dic. de 2014
Hi, i want to know how to crop the plate area only from the image shown below my code takes the RGB image & outputs this image, so i need only a way to extract the numbers area only here is the output picture
![](https://www.mathworks.com/matlabcentral/images/broken_image.png)
thanks in advance
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Respuesta aceptada
Andrei Bobrov
el 3 de Ag. de 2012
II=im2bw(I);
s=regionprops(II,'Area','BoundingBox');
[ii,ii] = sort([s.Area],'descend');
out = imcrop(I,s(ii(2)).BoundingBox);
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Image Analyst
el 3 de Ag. de 2012
You could pass the image into regionprops() and ask for area and eccentricity. The plate will have a lower eccentricity than the lines, and probably but not necessarily a larger area than any/most/all of the lines. But I can't tell that that rectangular blob with a bunch of holes in it in the lower left is not also another license plate. At least for this one particular image, you could get rid of that based on area or FilledArea.
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