Error calibration target to points - circular dots

[RutsT]

Hi

Here is my VI where I want to use the calibration target to points-circular dots function to start my calibration.

[URL=https://imageshack.com/i/0ycux2j][IMG]http://imagizer.imageshack.us/v2/xq90/34/cux2.jpg[/IMG][/URL]

This function seems to be quiet easy, yet I've come to an error which I can't get rid of. I think there is nothing wrong with the picture I want to proces, but you never know so you can find that picture in the attachements.

Kind regards

Ruts

[RutsT]

excuse me for the bad image link. Here is the direct link: http://imageshack.com/a/img34/5791/cux2.jpg

[Klemen · Accepted solution]

Hello,

you need to threshold the calibration grid image in order to extract the coordinates of the circles.

Take a look at the "Perspective calibration" example in Labview Help -> Find examples.

Also, reading detailed information of the functions you are using will also help:

Best regards,

K

[RutsT]

I always read the (detailed) help, but as you can see I visualized my image in my front panel and it says 1032x788 1X 8-bit image. So I assumed that meant it was a binary image.

Thanks for your help, typical rookie mistake from me (not the last).

Kind regards

Ruts

[Klemen]

Hello,

glad to help.

Actually, strictly speaking, in binary image each pixel can be represented only by a single bit (so 0 or 1), while grayscale image (8-bit) can use 256 values. As far as I know, in NI vision, a binary image is represented using a 8-bit grayscale, taking the same amount of memory.

Best regards,

K