xiQ - Technical Manual Version 1.35
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4.5.7.
HDR
Some sensors offer the ability to acquire images with a higher dynamic range than the value presented in the specification.
The high dynamic range can be achieved by several means as part of the sensor output. The feature that is used on xiQ cameras
is a piecewise linear response, a so-called multiple slope integration.
The dynamic range of a linear image sensor is limited by the saturation of the pixel. Different light intensities are shown in the
figure below. All blue marked light intensities cause different signal levels and can be separated without saturation. All red
marked intensities cause an overexposure and the info about the different light intensity above 100% is lost.
figure 4-7, image saturation example without HDR
Please note the exemplary corresponding positions 1 – 5 in the image with standard dynamic range:
figure 4-8, image example without HDR
exposure time
sa
tu
ra
tio
n l
ev
el
100%
1
2
3
4
5
