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White Balance

White Balance. What is White Balance?. White balance (WB) is the process of removing unrealistic colour casts, so that objects which appear white in person are rendered white in your photo .

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White Balance

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  1. White Balance

  2. What is White Balance? • White balance (WB) is the process of removing unrealistic colour casts, so that objects which appear white in person are rendered white in your photo. • Proper camera white balance has to take into account the "colour temperature" of a light source, which refers to the relative warmth or coolness of white light. • Our eyes are very good at judging what is white under different light sources, but digital cameras often have great difficulty with auto white balance (AWB) — and can create blue, orange, or even green colour casts.

  3. Techie Bit – Colour Temperature • Colour temperature is a way of measuring the quality of a light source. • It is based on the ratio of the amount of blue light to the amount of red light, and the green light is ignored. • The unit for measuring this ratio is in degree Kelvin (K). • A light with higher colour temperature (larger Kelvin value) has "more" blue light than a light with lower colour temperature (smaller Kelvin value).

  4. Real world example

  5. What do we do about it? • Shoot Raw – correct afterwards in Photoshop • Shoot in JPEG – Set camera before shooting

  6. Setting Camera

  7. Getting it wrong • Set for daylight and take photo under indoor lighting (reddish)

  8. Getting it wrong • Set for daylight and take photo under indoor lighting

  9. Getting it wrong • Set for indoor lighting and take photo under daylight (bluish)

  10. Getting it wrong • Set for daylight and take photo under indoor lighting

  11. Set Custom White Balance • Each make of camera does this in a different way – read your manual • Need a neutral colour to use as your target • Shop bought • Lid of Pringle tin • Special lens cover

  12. To finish • Shoot RAW and forget about it • Shoot JPEG and ideally set a custom white balance

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