The image shows a 532 nm wave with our blue-green filter. It is from an image of the charcoal at different shutter speeds. We tried to make sure the charcoal temperature remained constant so we could assume constant temperature. According to our data, the data from the red and blue channels gets saturated around 0.003 shutter speed, and the data from the green channel gets saturated before 0.001 shutter speed.

We created a set up outside behind our lab in order to ignite our coals and capture pictures. We used a butane lighter on a single charcoal briquette for about 4 minutes. It took some time to get the charcoal completely lit, and we had to go back to relight it every few minutes. We used a ~5 foot square metal hood, shaped like a roof, to cover the charcoal as it burned. We had to seal all the holes in the hood in order to create a dark environment underneath for the photos. We attached our smartphone over a hole in the hood to take pictures of the glowing charcoal briquette. We also placed our thermocouple on the charcoal on the spot we plan to analyze the image. We took about 30 photos and recorded the temperature simultaneously. We got images from about 900 to 700 degrees Fahrenheit.

We plan to go out again and take more images. We’ve enhanced our code to omit the ambient light so our image analysis is more accurate.

We also started looking into LAB color space which is a 3D convention for identifying color and luminosity of any pixel of an image. This method may help us determine temperature.