Image Acquisition
26
Printed 10.2013
Log
: By clicking on this button it is possible to influence the histogram
display. You can toggle between a linear scaling and a logarithmic display
of the signals represented in the histogram.
The logarithmic display makes it possible to view small amplitudes and high
peaks at the same time in a single overview. Otherwise, because of the
automatic scaling of the display, small signal values are often not visible in
the diagram.
Skip
: This function can be used to influence the automatic scaling of the
histogram. If an image contains an extremely bright glare or extremely dark
features the result will be overexposure or underexposure of the image in
these areas. All of these pixels possess the maximum / minimum numerical
value which can be displayed (e.g. in an 8-bit image 255 for overexposure
or 0 for underexposure). Consequently, for the gray value 255 the
histogram has to display an extremely high number of pixels with the same
value. As the scaling of the histogram curves is automatically adjusted to
this high value, smaller values can no longer be resolved in the display.
By using the
Skip
function the maximum values at the upper and lower end
of the histogram are omitted during the scaling of the display.
Summary of Contents for Axiocam 105 color
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