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Digital cameras gamma settings explained

By Jakob Jelling
Snapjunky.com

The digital camera is a fantastic device that can do wonders in the world of photography. When viewing or capturing images on the digital camera the idea of outputting them to a printer or other output device should be ensured with the perfection of gamma settings of adjusted correctly. If this is not calibrated correctly the images seen will not be the same as that output. Thus the digital camera gamma settings are really important. Thus this discussion is focused toward that revelation of the knowledge about digital camera gamma settings.

A further introspection into the digital camera gamma settings reveals the following. It can be stated that the image sensor in a digital camera is basically a linear device. This means that doubling the exposure doubles the output signal. When inputting a linear digital signal into a computer, the display on screen is non-linear and images tend to be darker with detail lost in shadow areas. This is because phosphors used in monitors are non-linear and make darker colors appear less dark and lighter colors extra bright. To prevent this the signal is electronically adjusted to counteract this effect. The monitor adjusts the input signal to boost dark areas and reduce light ones. This process is known as gamma correction and it ensures that camera and monitor working together produce a linear effect.

In order to get a authentic reproduction of the picture or image users or photographers can adjust the gamma settings of the monitors by using software supplied with the video card or through programmes such as Adobe Gamma supplied with Adobe Photoshop. This is the easiest way for the control of the digital camera gamma settings. The gamma function controls the general brightness or luminance and the contrast curve. This control allows an operator to set what is known as the characteristic curve of the camera, or the way in which it reproduces various tones along the black-to-white scale. Again further it can be stated that the black gamma controls the contrast and detail in the shadow and black areas of the picture. This may be further subdivided into a black stretch control for enhancing shadow detail, and a black press function that increases contrast.

The above lines of this discussion have focused into light some of the most important concepts regarding the subject of gamma settings. This is really important as the digital camera gamma settings make the experience of the digital camera as a device to be complete, and it is the right of every proud possessor!

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