ICP DAS USA IM-100 Manual Do Utilizador

 

The Gain and Brightness adjustment functions are accomplished by 

manipulation of the sensor’s digital output signal.   

Please refer in Figure 1-4; when the 

gain is set to 0, the full 10bit output 

range of the camera’s CMOS 

sensor will mapped directly to the 

8bit output range of the camera. In 

this situation, a gray value of 0 is 

output from the camera when the 

pixels in the sensor are exposed to 

no light and a gray value of 255 is 

output when the pixels are exposed 

to very bright light. This condition is 

defined as 0dB of system gain for 

the camera.   

As shown in the three graphs 

below, increasing the gain setting to 

a value greater than 0, maps a 

smaller portion of the sensor’s 10bit 

range to the camera 8bit output. 

When a smaller portion of the 

sensor range is mapped to the 

camera output, the camera’s 

sensitivity to a change in light level 

is increased. 

This feature can be useful when at 

your brightest exposure, a gray 

value of less than 255 is achieved. 

For example, if a maximum gray 

value of 127 is achieved with bright 

light, you could increase the gain 

setting so that the camera is 

operating at 6dB; thus seeing an 

increase in gray values to 254. 

 

 

 

 

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