The CLIP

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The CLIP
Henning Lorch Mario Kiekebusch et. al.
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What is the CLIP? (1)

• Common Library for Image Processing
• Use the latest pipeline SW technology (CPL) for
  the 2nd Generation Instruments control SW

Instrument Control SW
Pipeline DRS
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What is the CLIP? (2)
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Goals

• To provide a suitable image processing toolkit,
  flexible and well integrated with the INS SW
• To share the same image processing algorithms
  whenever possible between INS SW and pipeline DRS
• To improve observation efficiency

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Some LPO Image Processing Tasks

• Eclipse based
• Slit Position ? ISAAC, VISIR, NACO
• Jitter Pattern ? ISAAC, VISIR, NACO
• Cube Computation ? ISAAC
• Midas based
• Center/Gauss ? ISAAC, VISIR, VIMOS
• Center/Moment ? UVES, FORS1, FORS2
• Polynomial Fitting ? VIMOS
• Custom
• Image Reconstruction ? SINFONI
• Visibilities Computation ? AMBER
• Nodding Computation ? VISIR

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CLIP Definition

• CLIP is a package made up of several modules,
• providing an interface to CPL for VLTSW
  applications,
• defining a framework to add image processing
  capabilities to the INS SW,
• including a set of common image processing
  functions for Paranal.

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CLIP Package

• CLIP

DFS
VLT SW
CPL
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Main Features

• Provide a common framework to use image
  processing during instrument acquisition
• Extendability of the CPL to generic and specific
  instrument data handling / processing
  requirements.
• Data handling directly from the shared memory
  areas avoiding the I/O overhead.
• Direct access to the image processing algorithms.
• Standard error reporting.

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• VLTSW Interface

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C Interface

• Main Services
• Logging and error handling
• Wrappers for CPL objects
• Interface with RTD image event library

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Shared Memory
Client Mode
Acq. Process
RTD Server
Notify
Register/ Notify
Notify
Create/ Write
Clipv Client
Read
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Tcl interface

• Commands
• Input/Output (7)
• Image basic operations (13)
• Image statistics (8)
• Image Processing (6)
• Others (3)
• Special Features
• Image Store
• Vector by references

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Tcl Example
create clip object clipvtcl Clip attach
to camera Clip rtd_image_attach -c VIS wait
for the first image event Clip rtd_image_wait
-camera VIS -timeout 10000 Get the image from
shared memory Clip rtd_image_retrieve camera
VIS store image1 wait for second image
even Clip rtd_image_wait -camera VIS -timeout
10000 call the image processing algorithm Clip
image_cross_correlation -npoints 10
-store image1 camera VIS \ -ref1
reference -maxd 7 wsize 64 \ mode
SHIFT_ROBUST -tran transVector
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Development and Testing

• Camera Simulator (Clip Image Acquisition
  Simulator clipias)
• Supported modes BIAS, SKY and FILE
• Supported sky objects Gaussian star
• Supported star parameters pos, sigma, maxflux
  and gaussian norm.
• Template module
• Customizable module to develop instrument
  specifics interfaces (C and Tcl).

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• Image Processing Algorithms

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Image Processing Library (clipm) (1)

• Cover special image processing needs
• Serve as temporary development platform (until
  routines are accepted for CPL),
• thus providing flexibility by separating DFS and
  INS SW development cycles
• Thus instrument-only

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clipm (2)

• Provided Functionality

Linear Regression Cross-Correlation Random Number
Generation Image Gradient Operations (Image
Resampling/Stacking)

• Mathematical Routines

Centroiding Object / Image Alignment Aperture
Characterisation

• Common Recipes

• Error Handling Macros

• ...and future requirements!

Current Schedule Done Pending
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clipm Extension Template (xxclipm)

• To be used for shared code between Pipeline and
  INS control SW
• Containing Pipeline and VLT Build Procedures

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How to Use the xxclipm Template
Consortium
ESO
Repositories
Observatory
CVS
Pipeline World
DRL Developer
Pipeline DRL
Pipeline Integration
Pipeline Responsible
CMM
INS World
ltxxgtclipv (Wrappers)
INS Developer
INS / RTD Integration
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Status Outlook

• Status
• First prototype of the complete framework
  running, to be used by X-Shooter soon
• New module clipd interactive display (to come
  soon)
• Next Steps
• Implementation
• Remaining image processing algorithms
• RTD / display features
• Plotting capabilities
• Code Polishing
• Documentation
• User manual

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Whom To Ask

• Andreas Kaufer (LPO) ? Head
• Pascal Ballester (SDD) ? Management
• Peter Biereichel (SDD) ? Dev. RTD
• Mario Kiekebusch (SDD) ? Dev. VLTSW Interfaces
• Henning Lorch (SDD) ? Dev. Image Processing