selecting a portion of an image

[Nghtcrwlr]

Hello

I am having an image displayed in the front panel. Now i want to select a portion of the image such that when i select that particular portion in the front panel , the result is displayed. Is this possible?

AT present what i have done is, i take a subset from the image 2D array. But here i always have to enter the index and length by trial and error to locate the exact position. Is there a possibility to automatically detect the index and length when i select that portion in the original image???

Thankyou

[MikeS81]

Hi Nghtcrwlr,

you can use an Event Structure to read the mouse down/up/move position. If you store it in a shift register, you can use it to cut the part of the image you are interested in.

Mike

[Nghtcrwlr]

Hello Mike

How can we read the mouse down/up/move position in an event structure? I didnt fully understand.Could you please show an example.?

thnx

[MikeS81]

Hi Nghtcrwlr,

see the attached example please.

Mike

[Nghtcrwlr]

Hello Mike

Thankyou very much for you example. This was what i meant. I have modified ur VI to what i need. But still am having a difference. When i click a particular point in the original image, iam getting the result image at a distance away from where i click on original image. I tried to subtract the original pic size from both but still not wrkin. any idea?

Thnx

Message Edited by Nghtcrwlr on 02-12-2009 05:54 AM

[MikeS81]

Hi Nghtcrwlr,

see the attached example. You can select the part you need with the image. Mouse down -> move -> mouse up.

Mike

[Nghtcrwlr]

Hello Mike

Thanx... it worked. But i have one more question. How can i link the selected image to be used for another operation in the same VI. I tried to wire the output of the array subset out of the loop. But value is not coming out.

[Nghtcrwlr]

Hello Mike

I made it myself. now its wrking...

anywyzz thnxx