Add a Line ROI from a Camera image to a buffer

[Jeanlux]

Hello! I am new in LabView, and found this board with a lot of helpful answers to my questions. But I have still some left.

I would like to simulate a Line-Camera. Actually, I use a USB Webcam to aquire images. I wohld like to extrakt one line of each frame (for example the line 100 from top) und save it into a buffer.

1.) How can I extract exactly one row?

2.) How do I put the extracted line from the second image under the first one and so on... ?`

Would be great if I could get some hints!

Thnaks a lot

Jeanlux

[Uwe Symolka]

Hello Jeanlux,

you have two possibilities to extract one row in LabVIEW

But therefor you need necessarily the Vision Development Module for LV. This Module contain the programmable Vision Fuctions for LabVIEW

30 Days - Demo Downloadlink :  https://www.ni.com/en/support/downloads/software-products/download.vision-development-module.html

in the LV - AddOn tool you cant chosse between the IMAQ Getrowcol.vi and IMAQ Extract.vi 

IMAQ Getrowcol.vi 

Extracts a range of pixel values, either a row or column, from an image.

Related Examples

Refer to Examples\Vision\3. Applications\Gauging Example.llb for an example using this VI.

IMAQ Extract.vi 

Extracts (reduces) an image or part of an image with adjustment of the horizontal and vertical resolution.

Related Examples

Refer to the following examples that use this VI:

• Examples\Vision\2. Functions\Image Management\Extract Example.vi
• Examples\Vision\3. Applications\Mechanical Assembly Example.vi

best regards

Uwe