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How origin is moved to the centroid of an image

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Abul Abbas
Abul Abbas 2021-2-11
评论： Rik 2021-2-15
I have an image say NXN and i want to move the origin of the image to the centroid location.
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Matt J
Matt J 2021-2-11
Centroid is the centre of mass of the blob, say i have the image centre at [134,235]
If the size of your image is 267 x 469 then its center will always be at [134,235]. It cannot "move".
Maybe you mean you want to move the blob to the center of the image?
Abul Abbas
Abul Abbas 2021-2-11
yes i want to move the blob to the center of the image

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采纳的回答

Matt J
Matt J 2021-2-11
编辑：Matt J 2021-2-11
newImage = imtranslate(oldImage,[134,235] - [155,250])
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Abul Abbas
Abul Abbas 2021-2-11
how to substitute p(x/a+x1,y/a+x2) to p(x,y),where p(x,y) is original image, x1 and x2 are the centroid of p(x,y),x1=m10/m00,x2=m01/m00,a=sqrt(β/m00),β is a predetermined value. In fact, this is doing scale and translation normalization
Rik
Rik 2021-2-15
(this latter comment was posted as a separate question)

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Matt J
Matt J 2021-2-11
编辑：Matt J 2021-2-11
The image coordinate system is not something that is given to you, and that you have to "move". It is something you create using imref2d,
https://www.mathworks.com/help/images/ref/imref2d.html
You can use it to put your origin anywhere you want.
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Abul Abbas
Abul Abbas 2021-2-11
I have the image centre at [134,235] and my centroid location is at [155,250]. I want to move the image centre from [134,235] to [155,250]

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