nbanic

The ground-truth illumination for the images in the dataset has been obtained by placing a calibration object, namely a Spyder cube inside every image as can be seen. Since the...

The specific operation is to focus on the gray face(s) of the calibration object. If the illumination were pure white, than the R, G, and B components of the gray...

If you are interested in the chromaticity of the illumination, and for the ground-truth illumination this is its most important information, then it is enough to simply take the chromaticity...

1) Put the calibration object (in your case, a color card) into the scene. 2) Take a photo of the scene. 3) Use the raw image of the taken photo....

Regarding 4), you take any gray card that is suitable with respect to the equipment that you are using. The Inter-TAU makes a good choice. Namely, if the gray card...

Yes, it is something like that. When you create the ground-truth, you usually segment the gray card by hand. The reason that the direction of the vector is the only...

To the best of my knowledge, there isn't a widely known software that would do that for you. In most cases when you have a situation like this, you usually...

Yes, anything that helps should be OK. OpenCV is definitely a good choice, I also used it for these tasks. As for the tongue images, I did not have any...

Achromatic pixels are basically gray pixels, i.e., pixels without a color. Strictly speaking, you could argue that gray is also a color, but in the literature achromatic is usually used...

I think the order of defining it should be reversed: the pixels used to determine the ground-truth illumination are supposed to be gray, i.e., achromatic. As for the tongue images,...