How origin is moved to the centroid of an image

I have an image say NXN and i want to move the origin of the image to the centroid location.

[KALYAN ACHARJYA]

Can you define "what do you mean by centroid of an image"?

[Abul Abbas]

Centroid is the centre of mass of the blob, say 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].

TIA

[Matt J]

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]

yes i want to move the blob to the center of the image

Answer 1

[Matt J]

newImage = imtranslate(oldImage,[134,235] - [155,250])

[Abul Abbas]

thanks

[Abul Abbas]

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]

(this latter comment was posted as a separate question)

Answer 2

[Matt J]

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.

[Abul Abbas]

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]