MATLAB: Completion of Discontinuous Lines

edge detectionimabsdiffimage processingImage Processing Toolboximfill

I used imabsdiff in order to compute the absolute difference of two images of moving car. I then used im2bw to get the boundary/edge of the car. Now I would like to use imfill(I,'holes') in order to define the entire car. The problem is that the line that defines the car edge is not continuous. How can I complete the lines?

Best Answer

Try imclose() to close the gaps.

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Draw it continuous segment by continuous segment, OR put a NaN between the continuous parts. Or just let it connect the discontinuous parts.

Have you considered a stairs plot?

MATLAB: Thin the boundary of objects of black & white images

Use imerode.

From Matlab documentation:

IM2 = imerode(IM,SE) erodes the grayscale, binary, or packed binary image IM, returning the eroded image IM2. The argument SE is a structuring element object or array of structuring element objects returned by the strel function.

Example:

Erode a binary image with a disk structuring element.

originalBW = imread('circles.png');  
se = strel('disk',11);        
erodedBW = imerode(originalBW,se);
imshow(originalBW), figure, imshow(erodedBW)

Best Answer

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MATLAB: Plotting Discontinuous Function

MATLAB: Thin the boundary of objects of black & white images

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