LabVIEW picture control - many updates - memory problem

[k_tunsten]

Hello,

I have limited experience with LabVIEW and I'm currently using a picture control in one of my applications.

The idea is that certain regions (rectangles) inside the picture control get updated all the time with different colors. (depending on a measured parameters)

I have a main while loop which holds a shift register containing the picture control.

I noticed that the different "Draw Rectangle" operations I'm performing are accumulated so the memory keeps increasing...

I've made a small example program that demonstrates this behaviour.

I want to keep updating the picture control all the time in an easy way. How can I make sure that the memory does not get accumulated? Are there functions with which I can replace a part of the picture control with new pixel values instead of simply adding these new values each time to the picture control?

Thanks in advance for all your help!

[MikeS81 · Accepted solution]

Hi k_tunsten,

just remove the shift register. The result is the same, but the performance is much better and the memory will not increase.

OK it's not really the same, but the indicator buffers the old image, so that it looks like the same.

Hope it helps.

Mike

[Ben]

Adding to the above...

THe Picture control has a property "Erase first" that can be set to always erase, don't erase and erase once now that can be used when you need to re-build the image.

Ben