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how to get center point of a box and draw a circle

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Elysi Cochin 2014-2-10

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https://ww2.mathworks.cn/matlabcentral/answers/115541-how-to-get-center-point-of-a-box-and-draw-a-circle

回答： Image Analyst 2014-2-10

采纳的回答： Image Analyst

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is there any way to get the center point of the boxes and draw a circle with "point a" as center and "point b" as radius.... and cut the circled portion and save it as another image

http://imageshack.com/a/img853/3751/bvfs.png

 for i=i2:(i2+i4)
    for j=i1:(i1+i3)
        pointb(i,j)=255;
    end
 end
 for i = i6 : (i6+i8)
    for j = i5 : (i5+i7)
        pointa(i,j) = 255;
    end
 end

This is the code used to get the 2 white boxes. but how to draw a circle with "point a" as center and "point b" as radius.... please do reply....

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采纳的回答

Image Analyst 2014-2-10

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/115541-how-to-get-center-point-of-a-box-and-draw-a-circle#answer_123862

You should be able to get the center of the boxes if you drew them - just take the average of the left and right sides and the top and bottom rows.

Then you can draw a circle using any of the 4 ways in the FAQ http://matlab.wikia.com/wiki/FAQ#How_do_I_create_a_circle.3F

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