how to reduce edge thickness

Hi

I have a processes image and was wondering how I should go about reducing the thickness of the edges (please see attached)

Thanks

Answer 1

[Sarvesh Kale]

Hi mole20 ,

Following are the steps to reduce the thickness in the edge image, such operations are called morphological image operation. In your specific case you want to remove the pixel in image which is known as erosion operation

1. Define structuring element
2. Erode the edge image with structural element

If you look at your image most of the lines are inclined between 35 to 50 degrees so we will create a structuring element of length 5 and inclined at 45 degrees. The following lines of code will do the trick

I = imread('g21.png'); 
i = rgb2gray(I); % files in png format is 3D matrix 
se =strel('line',5,45);
I_erode = imerode(I,se);
imshow([I,I_erode]) % show image side by side 

You can get more help on different structuring element and imerode function using the following commands

help strel 
help imerode