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# SKYMAP -- Compute the geometric transformation required to register an
# input image to a reference image using celestial coordinate WCS information
# in the input and reference image headers. SKYMAP is a simple script task
# which calls the SKYXYMATCH task to compute the control points followed by
# the GEOMAP task to compute the transformation.
procedure skymap (input, reference, database)
file input {prompt="The input images"}
file reference {prompt="The input reference images"}
file database {prompt="The output database file"}
file transforms {"", prompt="The database transform names"}
file results {"", prompt="The optional results summary files"}
real xmin {INDEF,
prompt="Minimum logical x reference coordinate value"}
real xmax {INDEF,
prompt="Maximum logical x reference coordinate value"}
real ymin {INDEF,
prompt="Minimum logical y reference coordinate value"}
real ymax {INDEF,
prompt="Maximum logical y reference coordinate value"}
int nx {10, prompt="Number of grid points in x"}
int ny {10, prompt="Number of grid points in y"}
string wcs {"world", prompt="The default world coordinate system",
enum="physical|world"}
string xformat {"%10.3f", prompt="Output logical x coordinate format"}
string yformat {"%10.3f", prompt="Output logical y coordinate format"}
string rwxformat {"",
prompt="Output reference world x coordinate format"}
string rwyformat {"",
prompt="Output reference world y coordinate format"}
string wxformat {"", prompt="Output world x coordinate format"}
string wyformat {"", prompt="Output world y coordinate format"}
string fitgeometry {"general",
prompt="Fitting geometry",
enum="shift|xyscale|rotate|rscale|rxyscale|general"}
string function {"polynomial", prompt="Surface type",
enum="legendre|chebyshev|polynomial"}
int xxorder {2, prompt="Order of x fit in x"}
int xyorder {2, prompt="Order of x fit in y"}
string xxterms {"half", enum="none|half|full",
prompt="X fit cross terms type"}
int yxorder {2, prompt="Order of y fit in x"}
int yyorder {2, prompt="Order of y fit in y"}
string yxterms {"half", enum="none|half|full",
prompt="Y fit cross terms type"}
real reject {INDEF, prompt="Rejection limit in sigma units"}
string calctype {"real", prompt="Computation precision",
enum="real|double"}
bool verbose {yes, prompt="Print messages about progress of task ?"}
bool interactive {yes, prompt="Compute transformation interactively ? "}
string graphics {"stdgraph", prompt="Default graphics device"}
gcur gcommands {"", prompt="Graphics cursor"}
begin
# Declare local variables.
int nimages
string tinput, treference, tcoords, toutput, ttransforms, tresults
string tsections1, tsections2, tcname
# Cache the sections task.
cache sections
# Get the query parameters.
tinput = input
treference = reference
toutput = database
if (transforms == "") {
ttransforms = tinput
} else {
ttransforms = transforms
}
tresults = results
# Get the temproary coordinates file list.
tsections1 = mktemp ("tmps1")
tsections2 = mktemp ("tmps2")
if (access ("imxymatch.1")) {
tcoords = mktemp ("imxymatch")
} else {
tcoords = "imxymatch"
}
sections (tinput, option="fullname", > tsections1)
nimages = sections.nimages
for (i = 1; i <= nimages; i = i + 1) {
printf ("%s\n", tcoords // "." // i, >> tsections2)
}
delete (tsections1, go_ahead+, verify-, default_action+,
allversions+, subfiles+, > "dev$null")
tcname = "@"//tsections2
# Compute the control points.
skyxymatch (tinput, treference, tcname, coords="grid", xmin=xmin,
xmax=xmax, ymin=ymin, ymax=ymax, nx=nx, ny=ny, wcs=wcs,
xcolumn=1, ycolumn=1, xunits="", yunits="", xformat=xformat,
yformat=yformat, rwxformat=rwxformat, rwyformat=rwyformat,
wxformat=wxformat, wyformat=wyformat, min_sigdigits=7, verbose=no)
# Compute the transformation.
geomap (tcname, toutput, xmin, xmax, ymin, ymax, transforms=ttransforms,
results=tresults, fitgeometry=fitgeometry, function=function,
xxorder=xxorder, xyorder=xyorder, xxterms=xxterms, yxorder=yxorder,
yyorder=yyorder, yxterms=yxterms, reject=reject, calctype=calctype,
verbose=verbose, interactive=interactive, graphics=graphics,
cursor=gcommands)
# Cleanup.
delete (tcname, go_ahead+, verify-, default_action+,
allversions+, subfiles+, > "dev$null")
delete (tsections2, go_ahead+, verify-, default_action+,
allversions+, subfiles+, > "dev$null")
end
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