IMAQ Get LCD and USB Camera

[wizard33]

Hello 

I have a problem with block IMAQ Get LCD and USB Camera . I saw the example with this block but it works only with image. I create program but all the time i recivet te Invalid ROI error. Maybe someone created a similar program  and knows what is wrong. I would be grateful for help. I attached my program. 

Best Regards 

[crossrulz]

This is not the right board for asking questions.  I'll ask the moderator to move it to the Vision board for you.

[wizard33]

Thank You

[wizard33]

Maybe someone have an idea ?? 

[udka]

Read this?
http://forums.ni.com/t5/Machine-Vision/IMAQ-Get-LCD-ROI/m-p/3079585#M44419

[wizard33]

I read, I think something else is the problem, but i don't know what 😕

[udka]

Check the ROI descriptor values:
The values in the array in sequence are Top,Left,Bottom,Right,.
-According to IMAQ Read LCD, the minimum ROI Size should be 95x87.
-Which means you should take your ROI values such that they make larger region than 95x87.
-What are the ROI values you are taking? from screenshot i am seeing one value, from vi different, please make sure they are above the required ROI

[wizard33]

I changed the ROI parameters. In the first iteration of program the cameras try  to  find  the LCD display. The program reads  the different numbers sometimes, but labview  gives an error that this is the wrong LCD or LED display. . Suddenly the program turn off  and when i turn on the program again I recived the error from image. (Hex0xBFF6901B) Timeout.  What is wrong ?? (I turned off the windows barrier ant antyvirus)

If i want to read the data from display, the display need to be in the area cerated in ROI?? 

If I approach the display too close to the camera the IMAQ Get LCD will not work?? 

Best Regards