From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
From Friday, April 19th (11:00 PM CDT) through Saturday, April 20th (2:00 PM CDT), 2024, ni.com will undergo system upgrades that may result in temporary service interruption.
We appreciate your patience as we improve our online experience.
02-04-2008 04:03 AM
02-04-2008 01:23 PM
02-05-2008 01:24 AM
03-25-2010 04:44 AM
Hi, i am having similar problem....
So what happend if the origin of the coordinate system is outside the camera?
for example if I have something like
Point1 pixel 50,50 real 400,400
Point2 pixel 300,50 real 750,400
Point3 pixel 50,300 real 400,750
Point4 pixel 300,300 real 750,750
So lets say the origin in realworld coordinates is in a pixel that i actually don't see from the camera?
I don't really undestand why you have to include a origin, if you are giving points to it the origin should be easily calculated from thise points, but if i have to give the origin in pixel coordinate system then in some applications this origin can be outside the camera view.
Any ideas?
03-30-2010 04:14 AM
Hi,
you can use negative numbers to set the origin position if it is outside the image.
Best regards,
Serena
03-30-2010 07:55 AM
Hi
Yeah off course is posible to put negative numbers in the pixel origin, but i don't know those and i can not check them with the camera since the vision area is outside the robot origin. For example, if you would have a denso robot is easier because with the same matrix calibration you can actually teach a new coordinate system for the robot, same coordinate system than the matrix used for the camera calibration. As our in our own robot constructed system we can not have more than one coordinate system (it could be implemented but is just extra work), i would like that the camera software makes the coordinates trasformation. I quite don't understan why under NI calibration (point selection) you have to give a reference system if you are anyway giving the positions for the world system. Origin should be always in the origin of those position since they are calculated related from some origin.
BR
02-12-2015 09:48 PM
hi gregstoll,
i need to do point coordinates calibration in labview vi file
Point1 pixel 50,50 real 400,400
Point2 pixel 300,50 real 750,400
Point3 pixel 50,300 real 400,750
Point4 pixel 300,300 real 750,750
if i have 4 pixels point and real world location means how to apply this value to create calibrate image in labview .. (without vision assistant )
02-13-2015 01:07 AM
Hello,
this should work (check out the help for IMAQ Learn Perspective Calibration for more information) :
Best regards,
K
02-13-2015 01:48 AM
Hi Sir .. i need VI file please if dont mind
02-13-2015 01:51 AM
(No need vi file ) sir thanks a lot ....