Videos

(362 KB) 10 second video of the original temperature images.

(688 KB) 10 second video of the processed results of the temperature images.

Notice how the shapes wiggle in the processed video but seem stable in the original? This is due to low lighting noise that causes the adaptive threshold (first module) to make different decisions as to what is part of a digit and what is not. As this decision affects the final shapes of the digits they will appear to wiggle when viewed as live video. You will also notice that at times the digits will not match or accidentally become merged with other digits that cause the matches to fail. Again this is due to lighting creating noise in the final results.

Pipeline

The following is the processing pipeline as seen within RoboRealm to accomplish the digital reading.

Notes:

1. You will need to train the Shape_Match module on a folder that contains the database of images to be matched. You can do this by copying all the images into a single folder, edit the Shape_Match module, press the train button, change the path to your folder and press start.

2. You can view the final "temperature" variable by adding in a Watch_Variables module or by editing the VBScript module and focusing on the second variable column.

Your turn ...

Want to try this yourself? Following is the robofile that should launch RoboRealm with the original image we used in this tutorial. You can click on each of the steps in the pipeline to review what the processing looks like up to that point.

Download the Digital Reader robofile. Don't forget that you may need the folder of digits if you want to replicate exactly what we did. You can download that here.

The End

That's all folks. We hope you've enjoyed this little adventure into an application of machine vision processing and have inspired you to download a free trial of our software.

If you have any questions or comments about this tutorial please feel free to contact us.

Have a nice day!