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These meter settings include, but are not limited to: Â Evaluative: Evaluative metering operates by dividing the frame into several small segments, taking a reading from each individual segment, and processing the average of the total segments to recommend the best exposure value for the overall image. Â Spot: Spot metering operates by metering within a small target area that is usually in the center of the frame. Spot metering is particularly useful when your subject is placed in front of a relatively bright or dark background.

However, these solutions didn’t completely eliminate the problem because images shot in unforeseen and adverse lighting conditions remained irreparable during the printing stage. How White Balance Establishes Color Temperature When you take a photograph with a digital camera, the color temperature of the scene is not taken into account until the image is processed by the camera’s processor. The camera refers to its white balance setting when it processes the image. When the camera’s white balance is set to auto, the camera assumes the brightest value is white and adjusts all other colors in the image accordingly.

As you can see, this can become problematic when adjustments require a series of calculations and each subsequent value is inaccurate. Since a large number of calculations are required to perform complicated adjustments to an image, it is important that the adjustments are calculated at a significantly higher resolution than the input or output resolution in order to ensure the final rounded numbers are more accurate. In the example below, a green channel of a 24-bit pixel (with 8 bits per color channel) is capable of displaying 256 shades of green.

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