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An image on a computer is just a matrix where the number in each element indicates how much light was received by the camera sensor at the corresponding pixel position. 0 is black (as no light is received) and the largest value is white (as the pixel has received as much light as it can record). Therefore, we process the images using matrix algebra and various statistical techniques. This can be as simple as subtraction or more complicated techniques such as PCA and ICA. The aim of my phd is to develop new techniques that will yield better results.

Haha! Exactly! That would be a great name for a paper...!

We had a drawing where the sketches only disappeared in one half of the picture. We managed to recover the other half but we can't work out what would've made half the drawing disappear. It doesn't seem to have been treated by any chemicals or exposed to any damage so it's really bizarre that literally half of the drawing just disappeared. We also could see the drawing on the back of the paper when illuminated in UV which is odd as the material was thick and UV can only really recover what is on the surface as the wavelengths are shorter.

Unfortunately I can't right now. It was a private collection so there's odd copyright on the images. It will be released at the end of this year and so I'll post it when it's out :) Sorry!

I think this does occur. This technology is used in satellites so I'm sure there are a lot of processing techniques out there which we don't have access to yet as they are confidential. It's annoying when you want to use a technique that is under lock-and-key with software such as photoshop (which I never use but others do) and even MATLAB. MATLAB is pretty good at referencing the paper they took the technique from though. I prefer to use open source software like ImageJ if I'm not coding it myself so I can see exactly what has been done. We even have issues with academics publishing in non-open source journals so that you can't always access the research or new techniques.

Part of my contract states that everything I publish must be open-source so anyone can have access to my codes and techniques. I think this is the way academia seems to be going which is nice! We should all share our findings.