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Date Posted: 17:21:28 10/12/05 Wed
Author: Michel
Subject: Re: Detect edges from defined area
In reply to: Cesar Romero 's message, "Detect edges from defined area" on 13:45:50 10/10/05 Mon

Hello Cesar,

I am not sure I understand the question completely. You can select a rectangle area and Envision will give you the coordinates. You can do his in the demo by doing View | Mouse Mode | Select then select the area with the mouse.

Best regards,


>My project is:
>I have "human cells" image and need to draw the only
>one cell edge when user click over the cell with mouse
>Can I do that with Envision Image Library????
>1) user load the image (like the attached)
>2) user click over a image area
>3) the library need to draw in the edge a 1 pixel line
>and give the area (eg. heigh and width)
>The work will be always:
>1) Image will be black, white and gray tons
>2) the user will click over the center of a cell
>I dont want that you tell me step-by-step how to do
>that, I will work on that my self after study the
>library, but download the the demo and the Image|Edge
>detection dont work how I spected there, coz in demo I
>cant define the area.
>Any comments or suggestions is appreciated.
>A image sample can be found at
><a rel=nofollow target=_blank href="http://www.liws.com.br/projetos/0105001d.JPG">http://www.liws.com.br/projetos/0105001d.JPG</a>

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