White Balance and Hue
White balance in digital photography, as its name suggests, is the procedure for adjusting/correcting the overall color cast of lighting on a scene.
The principle is that by identifying areas that should be white in the image, then making adjustments so that they appear true white without a color cast, the color of the light falling on all other areas of the picture will also be neutralized. The obvious place to do this is in the camera as soon as the image has been captured, and this is practical because the color component of the image needs to be calculated in any case. As we saw on pages 22–23, the Raw capture is of tonal values only—effectively a monochrome image—and the color is sensed by filtering these values, pixel ...
Get The Low Light Photography Field Guide now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
