From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 8 Jul 2015 20:46:52 -0400 Subject: Initial commit --- pkg/images/immatch/src/xregister/rgxbckgrd.x | 63 ++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 pkg/images/immatch/src/xregister/rgxbckgrd.x (limited to 'pkg/images/immatch/src/xregister/rgxbckgrd.x') diff --git a/pkg/images/immatch/src/xregister/rgxbckgrd.x b/pkg/images/immatch/src/xregister/rgxbckgrd.x new file mode 100644 index 00000000..c9747ee6 --- /dev/null +++ b/pkg/images/immatch/src/xregister/rgxbckgrd.x @@ -0,0 +1,63 @@ +include +include "xregister.h" + +# RG_XSCALE -- Compute the background offset and x and y slope. + +procedure rg_xscale (xc, data, npts, nx, ny, offset, coeff) + +pointer xc #I pointer to the cross-correlation function +real data[ARB] #I the input data +int npts #I the number of points +int nx, ny #I the dimensions of the original subraster +real offset #I the input offset +real coeff[ARB] #O the output coefficients + +int wborder +pointer gs +real loreject, hireject, zero +int rg_xstati(), rg_znsum(), rg_znmedian(), rg_slope() +real rg_xstatr() + +begin + loreject = rg_xstatr (xc, LOREJECT) + hireject = rg_xstatr (xc, HIREJECT) + wborder = rg_xstati (xc, BORDER) + + switch (rg_xstati (xc, BACKGRD)) { + case XC_BNONE: + coeff[1] = offset + coeff[2] = 0.0 + coeff[3] = 0.0 + case XC_MEAN: + if (rg_znsum (data, npts, zero, loreject, hireject) <= 0) + zero = 0.0 + coeff[1] = zero + coeff[2] = 0.0 + coeff[3] = 0.0 + case XC_MEDIAN: + if (rg_znmedian (data, npts, zero, loreject, hireject) <= 0) + zero = 0.0 + coeff[1] = zero + coeff[2] = 0.0 + coeff[3] = 0.0 + case XC_SLOPE: + call gsinit (gs, GS_POLYNOMIAL, 2, 2, GS_XNONE, 1.0, real (nx), 1.0, + real (ny)) + if (rg_slope (gs, data, npts, nx, ny, wborder, wborder, loreject, + hireject) == ERR) { + coeff[1] = 0.0 + coeff[2] = 0.0 + coeff[3] = 0.0 + } else { + call gssave (gs, coeff) + coeff[1] = coeff[GS_SAVECOEFF+1] + coeff[2] = coeff[GS_SAVECOEFF+2] + coeff[3] = coeff[GS_SAVECOEFF+3] + } + call gsfree (gs) + default: + coeff[1] = offset + coeff[2] = 0.0 + coeff[3] = 0.0 + } +end -- cgit