For this exercise, you should find two or three images that have what you judge to be a significant colour cast. Make sure that at least one image contains a surface that is 'known' (expected) to be grey; such as concrete, steel, aluminium, thick clouds etc. We are then to correct it using our preferred processing software.
Colour Cast.
Colour cast is when a certain colour tints the whole of a photographic image evenly, this affect tends to be unwanted. Particular kinds of light can cause this to happen.
The first image I selected is a sculpture outside the University of Engineering in Cambridge. I really like the link between engineering and this solid, strong looking sculpture.
The image appeared to have a reddish colour cast to it when I opened it in Photoshop which I think may be down to the WB being shot in shade, which the sculpture was.
The second image is much more representative of the sculpture and the grey of the steel. The metal looked abnormally shiny in the image with the colour cast. I altered the WB to daylight which actually worked better and then adjusted the exposure.
This shot I took of the roof of the Grande Arcade shopping centre in Cambridge. There is a mix of indoor and outdoor lighting and the overall shot as a slight blueish cast to it.
For this shot it was necessary to alter the WB to daylight, adjust the temperature, fill light ever so slightly and also the exposure.
I think that I have successfully removed the colour casts and created a more accurate representation of the image at the time of shooting.
No comments:
Post a Comment