Apple Aperture 2 Manual do Utilizador descarregar pdf (Página 361)

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Chapter 14 An Overview of Image Adjustments 361

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A series of peaks in the center of the histogram often indicates a balanced exposure

because a majority of the pixels are concentrated within the midtones of the

histogram. They’re not too dark or too bright.

However, a series of peaks in the brighter side of the histogram often indicates an

overexposed image because most of the pixels in the image are too bright.

Evaluating Tonality and Contrast

Although histogram graphs are good tools for evaluating an image’s exposure, you

shouldn’t interpret histograms for exposure information only, because the shape of the

histogram is also influenced by the tonality in the scene. You need to take the subject of

the image into account when evaluating its histogram. For example, images shot at night

are naturally going to have a majority of peaks in the darker side of the histogram.

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