FLIR A6000 Series User Manual

5 –Camera Controller
A6000 and A8500 Series User’s Manual 52
5.5.5.1.3 Bad Pixel Correction
Within the NUC table there is an indication if a particular pixel has been determined to be bad, as seen
in Figure 4-15. There are two methods the camera uses to determine bad pixels.
x +
NUC Table
Bad Pixel
Replacement
Algorithm
Corrected Data
Uncorrected Data
Bad Pixel
Indicator
Figure 4-15: Bad Pixel Correction
First, the NUC table gain coefficients are compared to a user defined acceptance boundary,
Responsivity Limit Low/High (%). The responsivity of a pixel can be thought of as the gain of that pixel.
The gain coefficient in the NUC Table is a computed value that attempts to correct the individual pixel
gain, or responsivity, to a normalized value across the array. Since the responsivity value directly
relates to the gain coefficient in the NUC table, the camera can scan the NUC table gain coefficients
and use them to determine if a pixel’s responsivity exceeds the limits as set by the user.
The second method of determining bad pixels is to search for twinklers. Twinklers are pixels that have
responsivity values within normal tolerances, but still exhibit large swings for small input changes.
These pixels are on the “verge” of being bad and often appear to be noisy. To find these types of pixels
the camera collects N number of frames and records the maximum and minimum values across that
sample set for each pixel. If the delta between max and min exceeds the Twinkler max pixel value delta
then the pixel is determined to be bad.
The camera supports two algorithms for bad pixel replacement: 2-point Gradient, and Nearest Neighbor.

FLIR A6000 Series Specifications

General

Operating Temperature	-15°C to +50°C
Spectral Range	7.5 µm
Accuracy	±2°C or ±2% of reading
Power Requirements	PoE (Power over Ethernet)
Storage Temperature	-40°C to +70°C

Summary

Revision History

Introduction

Camera System Components

Lists items typically contained in the camera box, including accessories.

Camera Models

Describes the different models within the A6000 and A8500 series families.

System Overview

Details the A6000 and A8500 series infrared camera systems and their technologies.

Key Features

Highlights GEV/GenICam compliance, linearity, 14-bit data, windowing, presets, superframing.

Warnings and Cautions

Installation

Basic Connections

Details the physical connections on the back panel of the A858x camera.

Power Connection

Explains how to connect the AC power supply and turn on the camera.

Video Output Connections

Describes connecting HD-SDI and GigE digital video outputs for monitoring.

Camera Controller

Menu and Navigation

Accesses main menu options and provides status information.

Camera Setup Options

Configures general settings, sync, trigger, filter, and flag parameters.

Correction and NUC Management

Manages Non-Uniformity Corrections (NUCs), including loading and performing.

Video Output Settings

Provides controls for optimizing analog video output, including AGC.

Advanced Settings

Accesses digital, analog, and saturation settings for fine-tuning.

Interfaces Overview

Mechanical and Status Indicators

Details camera dimensions and explains status LED indicators.

Power and Lens Interfaces

Describes power input connectors and various lens mounting interfaces.

Communication Interfaces

Covers Gigabit Ethernet, CoaXpress, HD-SDI, and AUX connector functions.

Sync and Trigger Inputs

Explains the functionality of Sync In and Trigger In signals for synchronization.

Specifications Overview

Interface and Connectivity Specs

Lists technical specifications for camera interfaces and video outputs.

Camera Performance Specs

Details windowing capacity, acquisition modes, performance, and general characteristics.

Detector and Correction Specs

Covers detector/FPA details and non-uniformity correction specifications.

Maintenance Procedures

Camera and Lens Cleaning Guide

Provides instructions for cleaning the camera body, cables, accessories, and optics.