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FITS I/O

CHECK_FITSCheck that array agrees with NAXISi, BITPIX keywords of FITS header
FITSDIRDisplay info about primary FITS header(s) on disk FITSRGB_to_TIFF - Combine separate red, green, blue FITS files into TIFF format
FITS_ADD_CHECKSUMAdd/update the CHECKSUM/DATASUM keywords in a FITS header
FITS_ASCII_ENCODEEncode an unsigned longword as an ASCII string
FITS_CLOSEClose a FITS file defined by a FITS Control Block (see FITS_OPEN)
FITS_HELPSummarize the primary data units and extensions in a FITS file
FITS_OPENOpen a FITS file and define a FITS Control Block (FCB)
FITS_READRead a FITS file specified by name or FITS Control Block (FCB)
FITS_TEST_CHECKSUMVerify the values of the CHECKSUM/DATASUM FITS keywords
FITS_WRITEWrite a FITS primary data unit or extension
FITS_INFODisplay info about disk FITS file(s) at a terminal or in Common
FXMOVESkip a specified number of extensions in a FITS file
FXPOSITOpen a FITS file positioned to beginning of a specified extension
HEADFITSRead a FITS header from a disk FITS file.
MKHDRMake a minimal FITS header for an image array.
MODFITSModify the header or data in a FITS array (without changing the size)
MRDFITSRead FITS file mapping table columns into IDL structure tags
MRD_HREADLike FXHREAD but can also read a FITS header from a Unix pipe
MWRFITSWrite a FITS file from a IDL array or structure
RDFITS_STRUCTRead an entire disk FITS file into an IDL structure
READFITSRead a disk FITS file into an IDL data and header array.
SXADDHISTAdd a history record to a FITS header
SXADDPARAdd or modify a parameter in a FITS header
SXDELPARDelete a keyword from a FITS header
SXPARObtain the value of a keyword in a FITS header
WRITEFITSWrite IDL data and header array to a disk FITS file. Image Manipulation in pro/image _______
BOXAVEBoxave an image, always using at least REAL*4 arithmetic
CONVOLVEConvolve an image with a PSF using the product of Fourier Transforms
CORREL_IMAGESCorrelation of two images. Called by CORREL_OPTIMIZE
CORREL_OPTIMIZECompute the optimal pixel offset of one image relative to another by maximizing the correlation function.
CORRMAT_ANALYZEAnalyze the correlation function made by CORREL_IMAGE
CR_REJECTGeneral iterative cosmic ray rejection for 2 or more images
DIST_CIRCLECreate a mask array useful for circular aperture photometry.
DIST_ELLIPSECreate a mask array useful for elliptical aperture photometry.
FILTER_IMAGELike MEDIAN or SMOOTH but handles edges & allows iteration
FREBINExpand or contract an image while conserving flux
IMLISTDisplay image pixel values around a specified center
MAX_ENTROPYDeconvolution by Maximum Entropy, given a PSF
MAX_LIKELIHOODDeconvolution by maximum likelihood, given a PSF
MEDARRMedian filter across a set of images (e.g. for cosmic ray removal)
POSITIVITYMap an image uniquely and smoothly into all positive values
PSF_GAUSSIANCreate a 1-d, 2-d, or 3-d Gaussian with specified FWHM, center
SIGMA_FILTERReplaces pixels deviant by more than a specified sigma from its neighbors. Useful for cosmic ray removal.
SKYADJ_CUBERemove the sky level from individual images of a data cube
XMEDSKYCompute the median sky as a 1-d function of X (for slitless spectra)