Wednesday, 10 March 2010

Why do black and white photography?

Why do black and white photography?
Some like to take pictures when there are low contrast situations.
Some advise to shoot black and white on a cloud day.
Some say choose a low ISO as possible in black and white mode.
Transforms overcast look into striking photo that evokes emotions
Pictures that lack a variety of colour are often benefited by being in black and white.
What becomes more important is contrast and tones while block the distraction of colors.
take the picture
What is tone a color or shade of color : light tones of blue.
The general effect in painting of light, color, and shade.

Lightness (sometimes called tone) is a property of a color, or a dimension of a color space, that is defined in a way to reflect the subjective brightness perception of a color for humans along a lightness–darkness axis. A color's lightness also corresponds to its amplitude.

Various color models have an explicit term for this property. The Munsell color model uses the term value, while the HSL color model and Lab color space use the term lightness. The HSV model uses the term value a little differently: a color with a low value is nearly black, but one with a high value is the pure, fully-saturated color.

In subtractive color (i.e. paints) value changes can be achieved by adding black or white to the color. However, this also reduces saturation. Chiaroscuro and Tenebrism both take advantage of dramatic contrasts of value to heighten drama in art. Artists may also employ shading, subtle manipulation of value.


Lightness (color), the lightness or brightness (as well as darkness) of a colour

isle of man mansions

Tone mapping is a technique used in image processing and computer graphics to map one set of colours to another, often to approximate the appearance of high dynamic range images in a medium that has a more limited dynamic range.
Burning and dodging are post processing for darkening and lightening parts of a photograph for added contrast and tone.