opencv publishOpenCVData not worky?

I have this piece of code and expected that my "input" function would get called

I do not know whether this is thought to trigger with every frame captured?

Anyway, in my case "input" does not get called. What is wrong with my code (tried it with 2241 and 2275)?

def input(data):
  print "in input"
opencv = Runtime.create("opencv","OpenCV")
topcodes = Runtime.createAndStart("topcodes","TopCodes")
opencv.addFilter("PyramidDown1", "PyramidDown")
opencv.addFilter("Transpose", "Transpose")

opencv.addListener("publishOpenCVData",, "input");
GroG's picture

Worky for me - (local build /

Worky for me - (local build / latest)

Did you send a noWorky ?

juerg's picture

my errror, my program looks

my errror, my program looks indeed like this:

def input(data) :
 simage = opencv.getDisplay()
 codes = topcodes.scan(simage.getImage())
 limit = codes.size()
 print "topcodes, ", limit
 for x in range(limit) :
    code = codes.get(x)
    print 'code number' , x ,'=', code.getCode()
now in my case - also the code is visible in the image - I get 0 codes found. That made me think the "input"  never got called.


the_Z0MBiE's picture

publishOpenCVData not working for FaceDetect coordinates

This particular code works for me too(although I am not using topcodes), but when I try to use publishOpenCVData for getting position of face, I get an error, both in MRL 1.0.1732 and 1.0.2652. My laptop has Windows 7 64-bit OS. What should I do?

Thanks for your help!


juerg's picture

done some more

done some more testing (mrl 2278).

Interesting that I need to move into the picture or change the cam position for the topcode to be detected. It also won't give me the code at startup with a static image.

At least I was not able to see this defined in the topcode service code.

after a while (and several positive recognitions) the script ran into a null pointer exception. Where and how would my script have to test for this (sent a noworky, juerg, 07/11/2017)?