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#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "fitsio.h"
int main(int argc, char *argv[])
{
fitsfile *infptr, *outfptr; /* FITS file pointers defined in fitsio.h */
int status = 0, tstatus, ii = 1, iteration = 0, single = 0, hdupos;
int hdutype, bitpix, bytepix, naxis = 0, nkeys, datatype = 0, anynul;
long naxes[9] = {1, 1, 1, 1, 1, 1, 1, 1, 1};
long first, totpix = 0, npix;
double *array, bscale = 1.0, bzero = 0.0, nulval = 0.;
char card[81];
if (argc != 3)
{
printf("\n");
printf("Usage: imcopy inputImage outputImage[compress]\n");
printf("\n");
printf("Copy an input image to an output image, optionally compressing\n");
printf("or uncompressing the image in the process. If the [compress]\n");
printf("qualifier is appended to the output file name then the input image\n");
printf("will be compressed using the tile-compressed format. In this format,\n");
printf("the image is divided into rectangular tiles and each tile of pixels\n");
printf("is compressed and stored in a variable-length row of a binary table.\n");
printf("If the [compress] qualifier is omitted, and the input image is\n");
printf("in tile-compressed format, then the output image will be uncompressed.\n");
printf("\n");
printf("If an extension name or number is appended to the input file name, \n");
printf("enclosed in square brackets, then only that single extension will be\n");
printf("copied to the output file. Otherwise, every extension in the input file\n");
printf("will be processed in turn and copied to the output file.\n");
printf("\n");
printf("Examples:\n");
printf("\n");
printf("1) imcopy image.fit 'cimage.fit[compress]'\n");
printf("\n");
printf(" This compresses the input image using the default parameters, i.e.,\n");
printf(" using the Rice compression algorithm and using row by row tiles.\n");
printf("\n");
printf("2) imcopy cimage.fit image2.fit\n");
printf("\n");
printf(" This uncompresses the image created in the first example.\n");
printf(" image2.fit should be identical to image.fit if the image\n");
printf(" has an integer datatype. There will be small differences\n");
printf(" in the pixel values if it is a floating point image.\n");
printf("\n");
printf("3) imcopy image.fit 'cimage.fit[compress GZIP 100,100;q 16]'\n");
printf("\n");
printf(" This compresses the input image using the following parameters:\n");
printf(" GZIP compression algorithm;\n");
printf(" 100 X 100 pixel compression tiles;\n");
printf(" quantization level = 16 (only used with floating point images)\n");
printf("\n");
printf("The full syntax of the compression qualifier is:\n");
printf(" [compress ALGORITHM TDIM1,TDIM2,...; q QLEVEL s SCALE]\n");
printf("where the allowed ALGORITHM values are:\n");
printf(" Rice, HCOMPRESS, HSCOMPRESS, GZIP, or PLIO. \n");
printf(" (HSCOMPRESS is a variant of HCOMPRESS in which a small\n");
printf(" amount of smoothing is applied to the uncompressed image\n");
printf(" to help suppress blocky compression artifacts in the image\n");
printf(" when using large values for the 'scale' parameter).\n");
printf("TDIMn is the size of the compression tile in each dimension,\n");
printf("\n");
printf("QLEVEL specifies the quantization level when converting a floating\n");
printf("point image into integers, prior to compressing the image. The\n");
printf("default value = 16, which means the image will be quantized into\n");
printf("integer levels that are spaced at intervals of sigma/16., where \n");
printf("sigma is the estimated noise level in background areas of the image.\n");
printf("If QLEVEL is negative, this means use the absolute value for the\n");
printf("quantization spacing (e.g. 'q -0.005' means quantize the floating\n");
printf("point image such that the scaled integers represent steps of 0.005\n");
printf("in the original image).\n");
printf("\n");
printf("SCALE is the integer scale factor that only applies to the HCOMPRESS\n");
printf("algorithm. The default value SCALE = 0 forces the image to be\n");
printf("losslessly compressed; Greater amounts of lossy compression (resulting\n");
printf("in smaller compressed files) can be specified with larger SCALE values.\n");
printf("\n");
printf("\n");
printf("Note that it may be necessary to enclose the file names\n");
printf("in single quote characters on the Unix command line.\n");
return(0);
}
/* Open the input file and create output file */
fits_open_file(&infptr, argv[1], READONLY, &status);
fits_create_file(&outfptr, argv[2], &status);
if (status != 0) {
fits_report_error(stderr, status);
return(status);
}
fits_get_hdu_num(infptr, &hdupos); /* Get the current HDU position */
/* Copy only a single HDU if a specific extension was given */
if (hdupos != 1 || strchr(argv[1], '[')) single = 1;
for (; !status; hdupos++) /* Main loop through each extension */
{
fits_get_hdu_type(infptr, &hdutype, &status);
if (hdutype == IMAGE_HDU) {
/* get image dimensions and total number of pixels in image */
for (ii = 0; ii < 9; ii++)
naxes[ii] = 1;
fits_get_img_param(infptr, 9, &bitpix, &naxis, naxes, &status);
totpix = naxes[0] * naxes[1] * naxes[2] * naxes[3] * naxes[4]
* naxes[5] * naxes[6] * naxes[7] * naxes[8];
}
if (hdutype != IMAGE_HDU || naxis == 0 || totpix == 0) {
/* just copy tables and null images */
fits_copy_hdu(infptr, outfptr, 0, &status);
} else {
/* Explicitly create new image, to support compression */
fits_create_img(outfptr, bitpix, naxis, naxes, &status);
if (status) {
fits_report_error(stderr, status);
return(status);
}
if (fits_is_compressed_image(outfptr, &status)) {
/* write default EXTNAME keyword if it doesn't already exist */
tstatus = 0;
fits_read_card(infptr, "EXTNAME", card, &tstatus);
if (tstatus) {
strcpy(card, "EXTNAME = 'COMPRESSED_IMAGE' / name of this binary table extension");
fits_write_record(outfptr, card, &status);
}
}
/* copy all the user keywords (not the structural keywords) */
fits_get_hdrspace(infptr, &nkeys, NULL, &status);
for (ii = 1; ii <= nkeys; ii++) {
fits_read_record(infptr, ii, card, &status);
if (fits_get_keyclass(card) > TYP_CMPRS_KEY)
fits_write_record(outfptr, card, &status);
}
/* delete default EXTNAME keyword if it exists */
/*
if (!fits_is_compressed_image(outfptr, &status)) {
tstatus = 0;
fits_read_key(outfptr, TSTRING, "EXTNAME", card, NULL, &tstatus);
if (!tstatus) {
if (strcmp(card, "COMPRESSED_IMAGE") == 0)
fits_delete_key(outfptr, "EXTNAME", &status);
}
}
*/
switch(bitpix) {
case BYTE_IMG:
datatype = TBYTE;
break;
case SHORT_IMG:
datatype = TSHORT;
break;
case LONG_IMG:
datatype = TINT;
break;
case FLOAT_IMG:
datatype = TFLOAT;
break;
case DOUBLE_IMG:
datatype = TDOUBLE;
break;
}
bytepix = abs(bitpix) / 8;
npix = totpix;
iteration = 0;
/* try to allocate memory for the entire image */
/* use double type to force memory alignment */
array = (double *) calloc(npix, bytepix);
/* if allocation failed, divide size by 2 and try again */
while (!array && iteration < 10) {
iteration++;
npix = npix / 2;
array = (double *) calloc(npix, bytepix);
}
if (!array) {
printf("Memory allocation error\n");
return(0);
}
/* turn off any scaling so that we copy the raw pixel values */
fits_set_bscale(infptr, bscale, bzero, &status);
fits_set_bscale(outfptr, bscale, bzero, &status);
first = 1;
while (totpix > 0 && !status)
{
/* read all or part of image then write it back to the output file */
fits_read_img(infptr, datatype, first, npix,
&nulval, array, &anynul, &status);
fits_write_img(outfptr, datatype, first, npix, array, &status);
totpix = totpix - npix;
first = first + npix;
}
free(array);
}
if (single) break; /* quit if only copying a single HDU */
fits_movrel_hdu(infptr, 1, NULL, &status); /* try to move to next HDU */
}
if (status == END_OF_FILE) status = 0; /* Reset after normal error */
fits_close_file(outfptr, &status);
fits_close_file(infptr, &status);
/* if error occurred, print out error message */
if (status)
fits_report_error(stderr, status);
return(status);
}
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