In this exercise I have taken a photo of a group of coloured objects, in this case wooden bricks from the boys toy box. They are very solid strong colours. I have grouped them around a piece of neutral grey card. I have then processed the original colour picture 4 times. Firstly into greyscale using photoshops default settings. Then I have applied a colour filter (either red, blue, yellow or green) before applying the greyscale conversion. This has a marked effect on the resultant black and white image.
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Blue filter
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The blue filter in this instance has a general darkening effect on the whole frame which I could have compensated for in the software I used (photoshop) The red appears much darker mainly blocked by the blue filter, it has a similar affect but not as strongly on the green and yellow but what is surprising for me in this case it still affects the blue blocks too. It may be that there is a different wavelength of light coming from the blue bricks and those being allowed to pass by the blue filter, but I understand what the results should be… the blue blocks should have appeared lighter.
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| Green Filter |
The green filter has blocked red light from the red bricks and made them appear darker, a lesser affect on the blue bricks but hasn't really affected the green and yellow bricks. These are the results I would have expected.
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| red filter |
The red filter has made the red bricks appear lighter, and significantly darkened the green and blue bricks just as expected.
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| yellow filter |
The yellow filter has significantly lightened the yellow bricks and the green bricks to a lesser extent but not really affected the blue and red bricks greatly.
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| Default B+W |
I have learnt in this exercise how to darken and light lent tonal elements in a black and white photograph using coloured filters. This is a really useful way of controlling the tones in the monochrome image.
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