Highlights Feature

As well as a histogram display, SLR cameras also have a 'highlights' feature which can be activated so that areas of lost pixel detail flash on and off repeatedly on the LCD monitor. To correct this overexposure we simply

fig. 3.30 This is the shape we are looking for. Notice that the histogram ends at the bottom of the graph towards the right-hand side, which means there are no pixels that have been 'burnt out' resulting in lost detail.

fig. 3.31 The luminosity of histograms which measures black

pixels to white with lost detail 256 pixels.

Very dark Dark

Light

Very light

0

255

reduce either the aperture, the shutter speed or the flash power so that the screen no longer indicates lost detail.

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