Apple Aperture 2 Manual de usuario descargar pdf (Pagina 360)

360 Part III Performing Image Adjustments

Understanding How to Read Histograms

The histogram is a graph that displays relative brightness in an image, from pure black to

pure white. The area under the graph represents all the pixels in the image. From left to

right, the histogram describes the range of dark pixels (shadows), gray pixels (midtones),

and bright pixels (highlights) in the image. The shape of the histogram graph depends on

the tonality of the scene and the exposure.

Evaluating Exposure

Histograms are good tools for evaluating exposure. For example, a series of peaks in

the darker side of the histogram often indicates an underexposed image that consists

mainly of dark pixels.

Pixels increase

Brightness increases

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Apple Aperture 2 Manual de usuario Pagina 360