DIY-Thermocam V2: A do-it-yourself thermal imager

I have a question. Can I use a USB Port Webcam?

When i'm trying to run the software. it say's that "the arduino COM Port is not recognized." and my USB Port Webcam can be activated. But when i fixed the Arduino COM Port, my USB Port Webcam is not working. It says that "The Spectrum of your video camera is not recognized."

What should i do? i follow the schematic and the step-by-step procedure by building it.