How to implement a funtion to 'Count an amount of one type of lego piece in the Image'?

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Chanodom Utsahajit 2015-1-18

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评论： Shruti Jha 2020-12-8

Sorry if it's a lot to ask but is there an easy way to implement a function that takes in the image of cluster of lego pieces and returns the count of a particular type of Lego piece? i.e. given the lego piece type shown in the first image--------->

how to implement a function that return the amount of the same type of lego pieces existed in the image below.

Thank you very much in advance!!

Baz

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Image Analyst 2015-1-19

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First you have to do color segmentation to get separate, individual blocks. See my File Exchange for demos: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

Then try using imfindcircles() to count the circles in each colored brick. Here is a demo: http://www.mathworks.com/matlabcentral/fileexchange/34365-circle-finder

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Image Analyst 2019-1-13

Well of course you can ask regionprops() for the BoundingBox, but I think you may want the Feret Diameters.

See this link: Image Processing Blog on Feret Diameters

Shruti Jha 2020-12-8

Adding on to this thread, I have a similar problem. I am able to isolate blue coloured legos, however when I perform edge detection and filling, I get something like this (the last image).