Boost/Enhance white pixels

Stelios Fanourakis 님이 질문을 제출함. 11 Sep 2019

최근 활동 Stelios Fanourakis 님이 댓글을 추가함. 17 Sep 2019

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1.bmp

How can I enhance or boost the white pixels of the image? Like multiplying them, make them double. Generally, thicker white lines (see attached).

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Sourav Bairagya 님의 답변 16 Sep 2019

채택된 답변

First, you can binarize the image and then use ‘bwmorph’ function to thicken the white lines present in the image.

Format of usage is as follows: bwmorph(img, ‘thicken’, n)

Here, ‘n’ is the number of times to perform the operations. You can control the thickening by controlling this parameter.

After thickening if you like to connect the unconnected pixels, then you can use ‘bwmorph(img, ‘bridge’)’ and then can use ‘imdilate’ function to enhance the connected line.

a=imread('1.bmp');
a=rgb2gray(a);
a=imbinarize(a);            % First binarize the given image
 
b=bwmorph(a,'thicken',1);   % Use bwmorph to thicken the white line
 
b=bwmorph(b,'bridge');      % Use this to connect the pixels
 
se = strel('line',10,180);  % Structuring element for dilation
b = imdilate(b,se);         % Dilates the image
 
imshow(b);

Hope this will help you.

For further information about ‘bwmorph’ function you can follow this link.https://www.mathworks.com/help/images/ref/bwmorph.html?s_tid=doc_ta

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Stelios Fanourakis 17 Sep 2019

That's very good Sourav. Thanks a lot.

However, the bridge command didn't actually work. Maybe I need to define certain value for all pixels to get connected.

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