MOPEX User's Guide - IRSA

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PURPOSE MOPEX User’s Guide Detect performs image segmentation (see §8.4). In the Overlap pipeline, it is used only for bright object detection - i.e. to identify bright pixels (both spurious and astronomical) that should not contribute to the background matching. Detect produces bright object detection maps. INPUT Detection Max Area: (int) The maximum area (pixels) of a detected pixel cluster before iterative thresholding. Detection Min Area: (int) The minimum area (pixel) for a detected pixel cluster to be retained; smaller clusters are discarded. Detection Threshold: (float) The number of sigma above the mean to be used as the initial threshold used for cluster detection. Threshold Type : This parameter determines the way the image segmentation threshold is recalculated during iterative thresholding. The threshold type does not depend on the type of input image. See §8.3 for a description of the thresholding options. Detect output subdirectory: The subdirectory of that you wish to use for the output files. Default is Detect-overlap. COMMAND LINE INPUT &DETECT Detection_Max_Area = 1000, Detection_Min_Area = 0, Detection_Threshold = 3, Threshold_Type = 'simple', &END In Global Parameters: DETECT_DIR = Detect-overlap Overlap (overlap.pl) 38 Overlap Modules
OUTPUT MOPEX User’s Guide Generated Fits Files (*detmap.fits): With the default parameters, these are the detection maps produced from the input images. A positive number indicates the threshold level reached for that cluster. DISCUSSION In the Overlap pipeline, Detect is part of Bright Object Masking (set Mask Bright Object in the Mosaic Interpolate module). The detection of bright pixels is performed on the background-subtracted images (the output of the Med Filter module), which are in original pixels. The output is a set of mask images, one per input image, in which pixels corresponding to detected objects are set to a positive value. The mask images are saved in the Detect output subdirectory unless the Delete Intermediate Files option was set in the Overlap Settings module. If Mask Bright Object is set in the Mosaic Interpolate module then these masks will be used in the further processing. 4.3.7 Overlap Modules: Mosaic Interpolate Command Line Equivalent: run_mosaic_int Default Output Directory: /Interp-overlap De pe nds On: Initial Settings; Fiducial Image Frame; S/N Estimator (if included) PURPOSE This module performs a projection of input images onto a 2D plane defined by the FIF table, and an interpolation (see §8.4) of the input pixel values to the output array of pixels of the user-defined pixel size. It corrects for the optical distortion in the input images, using the WCS distortion parameters in the input FITS headers. The process is intended to accept images measuring surface brightness (MJy/sr or microJy/arcsec 2 ) and to yield images in the same units, but it is not restricted to this. If the input FITS header does not contain an allowed string specifying units of MJy/sr or microJy/arcsec 2 , then it will assume the input units are counts. INPUT Overlap (overlap.pl) 39 Overlap Modules
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MOPEX User’s Guide Standard Devia
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Mosaic Coverage File (mosaic_cov.fi
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There are no user-defined input par
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COMMAND LINE INPUT See INPUT. OUTPU
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MOPEX User’s Guide limitations di
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6.3 Running APEX MOPEX User’s Gui
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MOPEX User’s Guide Point Source D
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Figure 6.1: Overview of the main pr
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Relevant Pipelines: All PURPOSE INP
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NICE = 1 save_namelist = 1 MOPEX Us
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MOPEX User’s Guide Mosaic PRF Fil
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create_unc_mosaic = 1 use_std_to_de
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MOPEX User’s Guide Use Refined Po
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MOPEX User’s Guide Here FLUXCONV
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MOPEX User’s Guide This module cr
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MOPEX User’s Guide year) and with
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MOPEX User’s Guide Mosaic FIF Tab
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MOPEX User’s Guide Tile BCD file
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MOPEX User’s Guide Window X, Y: (
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MOPEX User’s Guide neighboring pi
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⎛ ⎜ ⎜ P( j) = ⎜ 1+ ⎜ ⎜
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&END MOPEX User’s Guide if use_ps
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MOPEX User’s Guide \float Tile_Of
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MOPEX User’s Guide This module co
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MOPEX User’s Guide is recorded as
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&END OUTPUT MOPEX User’s Guide Th
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INPUT Columns selection: MOPEX User
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PURPOSE MOPEX User’s Guide Fits t
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MOPEX User’s Guide given below. O
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6.5.19 APEX Modules: Aperture Photo
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MOPEX User’s Guide This module al
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Condition Builder: Some simple sele
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MOPEX User’s Guide Fatal Mask Bit
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MOPEX User’s Guide Pixel by Size:
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MOPEX User’s Guide Mosaic PRF Fil
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PRF_ResampleX_Factor = 100, PRF_Res
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7.3 Running PRF Estimate MOPEX User
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MOPEX User’s Guide 3. Outlier Rej
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PURPOSE MOPEX User’s Guide Set up
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MOPEX User’s Guide Most users wil
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DISCUSSION MOPEX User’s Guide Wit
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7.5.5 PRF Estimate Modules: Split B
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MOPEX User’s Guide Fit Seed: (int
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Chapter 8. Basic Concepts in MOPEX
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8.2 Outlier Detection MOPEX User’
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MOPEX User’s Guide Figure 8.3: An
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MOPEX User’s Guide Two ways to es
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MOPEX User’s Guide USE_DUAL_OUTLI
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MOPEX User’s Guide Figure 8.9: As
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MOPEX User’s Guide Important: Usi
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MOPEX User’s Guide Figure 8.12: T
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8.3.2 Thresholding MOPEX User’s G
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T cl = P min − T min SegLevel MOP
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Centroid _ X = ∑ i∈cluster X(i)
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MOPEX User’s Guide where IPi is t
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MOPEX User’s Guide Figure 8.18: T
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8.4.5 Cubic: Bicubic Interpolation
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z n = ∑ r(r≠n ) Onr(I n − Ir
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MOPEX User’s Guide the parameter
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MOPEX User’s Guide that resembles
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∑ AP = a i ⋅ I i MOPEX User’s
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8.9.3 Aperture Uncertainties MOPEX
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MOPEX User’s Guide In order to ru
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MOPEX User’s Guide from the GUI,
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9.4.2.1 Input Files and Output Dire
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MOPEX User’s Guide Table 9.1: Lis
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9.7.2 APEX User List Multiframe (ap
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9.7.4 Single-frame mode (apex_1fram
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MOPEX User’s Guide Table 9.6: Lis
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Appendix A. Full List of MOPEX Scri
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A.1.3 Under Construction Running MO
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Appendix B. Full List of Modules in
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Mosaic Interpolate run_mosaic_int P
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Running MOPEX on the Command Line a
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B.5 PRF Estimate Modules Running MO
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Instrument PRF Samp c Norm Radius (
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Some Tips for MOPEX with Spitzer Da
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