Question for the IMAQ learn camera model vi

[chulminy]

Dear experts.

I have one quick and short question. I'm using the IMAQ learn camera model.vi. What does mean by "image" input line?

I guess camera calibration results will be saved in the "Calibration Template Image" and the only information for camera calibration is "Reference Points". Is it right? 

However, I'm not sure what is the "image" input?

Thanks

[Klemen]

Hello chulminy,

the "input image" is the image of the calibration grid. This is the same image, from where the "reference points" needed for calibration are extracted. At least, that is the input I am using.

It is also possible to leave this input unwired, the calibration will still be performed.

Take a look at the "Perspective calibration example.vi". The "IMAQ Learn distortion model" is used basically the same as "IMAQ Learn camera model". (the camera model learns the optical characteristics also - principal point and focal length).

Hope this helps.

Best regards,

K

[HighTech]

Hi K,

there must be a reason for the input of "image", I assume the image input will be used to fine tune the results, but need NI developers to confirm.

Regards

T

[Klemen]

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@HighTech wrote:

Hi K,

there must be a reason for the input of "image", I assume the image input will be used to fine tune the results, but need NI developers to confirm.

Regards

T

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Hello,

looking at the function call, I see that the "image" input is declared as a "void *Thumbnail Image". Judging by the name, this is a reduced image of the original, though I don't know what is the purpose of it. Probably to recognize the image easier if you store it on a HDD.

If you find out anything further about this, please post it here.

Regards,

K