What is the purpose of color-adjusting light sources with gels in digital photography? Are they reserved exclusively for scenarios in which one wants different colors from different lights? I assume ...
Look at this image: 50% of its pixels are blue (0, 0, 255), 50% of its pixels are yellow (255, 255, 0). When I look at my computer display from a distance where I cannot distinguish the ...
For a scientific study, I have to classify pictures of crop canopy in two classes: vegetation / soil. These picture are taken at several places, different times and date. The idea is to use the same ...
I took the attached picture with an iPhone 4, outside around 5pm, which was close to sunset. Does the subject's face have too much red tint? If yes, how would I fix this?
I saw in another question - "Why is the Fluorescent filter for a flash green?" - that Matt Grum had amazingly color corrected two images and would love to know how. Of course, all are invited to ...
I was used to the ageratum effect with film cameras: as the red pigment on film is much more sensitive to IR than the humman eye, some flowers (such as the ageratum) appear pink in a photograph while ...
I have noticed that the colours in my photos are quite dependant on the medium on which I am viewing them — the camera LCD, computer monitor, TV, digital photo frame and print. So, something that ...
I took this image in a train station with shutter speed 1/8 second and AV mode, the aperture was chosen to be 4.5. The problem in the colors of the spotlight in the right corner of the image. In the ...
In a recent question, Steve Ross points out that Adobe Photoshop has a useful feature for matching color between photographs. Of course, color adjustment can be accomplished in Gimp with careful use ...