We have the color filter array characterized, but now we are looking into gamma correction to understand how the jpeg compression affects the original picture. A gamma correction is an operation an image compression (jpeg) applies to a picture in order to correct brightness. The picture shows an example (taken from learnopengl.com) of what gamma correction does. Gamma correction is helpful when showing an image of an object the way our eyes perceive the object (because a camera and our eyes are not the same), but it is not so helpful to our project when we need raw data. That is why we are looking into undoing the effects of gamma correction. We have done some research that suggests we can adjust for the jpeg compression by applying an inverse power to the image to get a linear relationship between the intensity and shutter speed. A linear relationship will allow us to get a much more accurate temperature calculation in the end.

Additionally, we have been continuing the process for imaging charcoal. It is difficult to keep a uniformly lit section of charcoal, so we are addressing this issue now. Charcoal has an emissivity of about 0.95 which makes it roughly similar to a black body source. This light source can be used as another means of calibrating the camera as well.