is image 2 in image 1?

[Mark Schonewille]

Hi Bernard,

If you use the select tool to copy a part of an image object to the 
clipboard, the data get converted to PNG by default. When you paste the 
image from the clipboard, the image is converted back to image data. 
Usually, a few bits change here and there and the imagedata in the new 
data is not equal to the imagedata of the copied part of the original image.

If you duplicate an image and control-drag the handles of the image 
object to crop it or use the crop command, you will get a new image with 
imagedata that were never converted. The imagedata of this new image are 
indeed equal to the imagedata of the corresponding part of the original 
image.

So, your optimism is justified.

--
Best regards,

Mark Schonewille

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On 3/8/2015 10:32, Bernard Devlin wrote:
> Is it possible to do this in livecode?
>
> It would seem obvious to my naive mind, that since we have the imagedata,
> and if image 2 is a crop of image 1, then we ought to be able to find out
> if image 1 contains image 2.
>
> Or am I insanely optimistic?
>
> Regards,
> Bernard