How do you build up an image from a linescan camera

[Rob McIntosh]

Hello,

I am using a linescan camera to take an image of an object moving in front of it. I would like to take a picture of each part of the object as it moves by and build up one single image of its surface. Any suggestions on how to go about this?

Thanks

[chilly_charly]

I think there are things that should interest you here :

http://forums.ni.com/ni/board/message?board.id=170&message.id=133223

[RManion]

Hi Rob,

Though it will depend upon the type of line scan camera you have selected for your application, I have included a couple of links that may help you get started.

Tutorial: Variable Height Acquisition with Line Scan Camera

Hope this helps,

Robert Manion

Applications Engineering

National Instruments

[Rob McIntosh]

I’m really trying to build up these line scan images, by snapping pictures that are 1 pixel by about 8,000 pixels and then with each successive snap building to that image so the image size will increase to 1x8000, then 2x8000, 3x8000 and so on. Then when the entire image has been captured save the image to a pjg. The snaps will be used on a timed, rather than a triggered basis.

[RManion]

Hi Rob,

Thank you for the explanation.

In your particular application I could see the "Image to Array" and "Array to Image" functions, coupled with the Array manipulation subpalette from LabVIEW, being most useful.  Snap pictures into one image, transfer them to an array, append them to the greater array, and tranform that array into a different image.  repeat this process as needed.

Hope this helps,

Robert

[Rob McIntosh]

I believe that is what I am doing in the attached program here. However I am not sure if the image is actually growing in size and the pictures are only acquired about every 2 seconds maximum. Certainly I should be able to snap pictures faster than that.

[chilly_charly]

I'm not sure if the insert into array node was used appropriately in your vi.

Same comment for the last image display node, where no image space had been declared before (with IMAQ create).

Try the attached vi.