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Re: Cropping image parts through list of lists

  • To: mathgroup at smc.vnet.net
  • Subject: [mg130197] Re: Cropping image parts through list of lists
  • From: Vince Virgilio <blueschi at gmail.com>
  • Date: Tue, 19 Mar 2013 00:06:01 -0400 (EDT)
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On Wednesday, March 13, 2013 4:18:03 AM UTC-4, TDMF HT wrote:
> Newbie with OOP way of thinking, so bear with me :) Thank you !
> 
> 
> 
> Given - list of lists:
> 
> 
> 
> myList = { { {0,100},{50,100},{800,600} } , { {{100,100},{150,100},{1024,768} } }
> 
> 
> 
> Using the above list of lists, I want to crop two different parts from a single image an resize the resulting partial image in the following way;
> 
> 
> 
> Cropped image 1:
> 
> cropXY: 0,100/50,100
> 
> resize: 800,600
> 
> 
> 
> Cropped image 2:
> 
> cropXY: 100,100/150,100
> 
> resize: 1024,768
> 
> 
> 
> My OOP way of thinking tells me to iterate/loop over the outer and inner lists.
> 
> This doesnt seem to be the Mathematica way, so I spent the last couple of hours messing around with
> 
> DO/TAKE etc. and all image related functions.
> 
> 
> 
> I dont seem to find the right way to sequentially go over the inner lists and crop/resize the two parts from the single image.
> 
> Id really appreciate a few tips on how to get this done.
> 
> 
> 
> Thanks a bunch !!!!

Maybe

newImages = MapThread[ cropFunction, { img1, img2 }, { parm1, parm2 } ];

where

cropFunction[img_, { cropX_, cropY_, resize_}] := Module[{...}, newImage = ...; newImage ];

does the work.




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