Functional Description; Block Diagram - CAMERA LINK Q-2A340 Operating And Users Manual

4.

Functional description

This chapter contains a functional description of the Quartz cameras. It describes the main functions
and features of the camera using a simplified block diagram.
4.1

Block diagram

The diagram below shows the main functional blocks of the Quartz cameras.
Exposure
Modes
ROI
Image Capture
Figure 4.1: Block diagram of the camera
The CMOS image sensor is equipped with one analog to digital converter per pixel column.
A programmable Region Of Interest (ROI block) is available. The camera will only output video
information from a rectangular subframe, programmed through the ROI command. This reduces the
amount of data and can increase the frame rate.
The defect pixel correction function can be enabled and disabled on demand.
For functional testing of the camera and frame grabber chain, a test pattern generator is available. The
test pattern generator can also be enabled and disabled on demand.
Flat field correction allows for correction of shading. This can be calibrated in the field.
Digital Gain is applied within the basic processing block. An output look-up table is available; this
table allows real-time conversion of the video levels from the processing chain according to a user
programmable curve (e.g. Gamma-function).
The camera is able to average a number of images before they are output over the interface. This
reduces the temporal noise significantly.
Horizontal binning and vertical binning digitally averages a number of pixels into a single pixel. The
used method is suitable to increase sensitivity.
OPERATING AND USER MANUAL QUARTZ SERIES
Defect pixel
Correction
Frame
Test pattern
Averaging
Flat field
Binning
Correction
Basic
Image flip
Processing
Image Processing
Camera Link
Interface
Format
conversion
Image tagging
Frame
Buffering
Image Output
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