Basler A400K Manual de usuario descargar pdf (Pagina 145)

Features

Basler aviator Camera Link 137

If the pixel values being output by the camera’s sensor are high enough to set bit 8, bit 9, bit 10, or

bit 11 to 1, we recommend not using shift by 4. If you do nonetheless, all bits output from the camera

will automatically be set to 1. Therefore, you should only use the shift by 4 setting when your pixel

readings with a 10 bit pixel format selected and with digital shift disabled are all less than 64.

7.9.3 Digital Shift With 8 Bit Pixel Formats

No Shift

As mentioned in the Functional Description section of

this manual, the camera uses 12 bit ADCs to digitize

the output from the imaging sensor. When the camera

is set for a pixel format that outputs pixel data at 8 bit

effective depth, by default, the camera drops the 4

least significant bits from each ADC and transmits the

8 most significant bits (bit 11 through 4).

Shift by 1

When the camera is set to shift by 1, the output from

the camera will include bit 10 through bit 3 from each

ADC.

The result of shifting once is that the output of the

camera is effectively multiplied by 2. For example,

assume that the camera is set for no shift, that it is

viewing a uniform white target, and that under these

conditions the reading for the brightest pixel is 10. If

you changed the digital shift setting to shift by 1, the

reading would increase to 20.

If the pixel values being output by the camera’s sensor are high enough to set bit 11 to 1, we

recommend not using shift by 1. If you do nonetheless, all bits output from the camera will

automatically be set to 1. Therefore, you should only use the shift by 1 setting when your pixel

readings with an 8 bit pixel format selected and with digital shift disabled are all less than 128.

ADC

Not Shifted

bit

ADC

Shifted Once

bit

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Basler A400K Manual de usuario Pagina 145