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Re: Image processing Questions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg110580] Re: Image processing Questions
  • From: Matthias Odisio <matthias at wolfram.com>
  • Date: Sat, 26 Jun 2010 03:11:51 -0400 (EDT)

Robert,

On 6/25/10 6:26 AM, Robert Pigeon wrote:
> Hello to all,
>
>   I have two questions related to image processing.
>
> First question : I have some pictures taken with my digital camera and on
> the pictures I have the date in red numbers on them. I would like to erase
> those numbers from the pictures. I tried the procedure described on Wolfram
> web site about image processing  (Removing text from an image). But it is
> not working and I don't know why. Maybe some of you are doing it and could
> share with me the procedure ?
>

What exactly did you try? If you could point to an example that would be 
easier to help.

> Second question : I take a portion of an image using ImageTake. I do some
> processing on that portion. Now I would like to put back that portion in the
> original image. How can I do that? It would be like the inverse of
> ImageTake... Any idea?
>

Assuming the portion you take has its top left corner at {r1, c1}:

sub = ImageTake[img, {r1, r2}, {c1, c2}]

new = ImageCompose[img, sub, {Left, Top}, {r1, c1}]

Matthias Odisio
Wolfram Research


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