Setting an image's aspect ratio automatically in PS

I'm using PS7 under Windows and have a batch of images, none of which have an aspect ratio of 1:1. These all need to be modified to set the aspect ratio to 1:1.

What I need to do is set the canvas size of any image, whereby the shorter edge of the canvas is automatically increased to the same size as the longer edge - effectively setting the aspect ratio to 1:1.

Does anyone have an easy method of doing this so that the task can be used in a batch process?

Regards,
Shaun.

"Code Developer" wrote in
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I'm using PS7 under Windows and have a batch of images, none of which have an aspect ratio of 1:1. These all need to be modified to set the aspect ratio to 1:1.

What I need to do is set the canvas size of any image, whereby the shorter edge of the canvas is automatically increased to the same size as the

longer

edge - effectively setting the aspect ratio to 1:1.

Does anyone have an easy method of doing this so that the task can be used in a batch process?

I should also mention that some images are 'tall' and some are 'wide', so PS would have to find the longer edge before setting the canvas size.