2 files changed, 109 insertions, 0 deletions
diff --git a/bin/gen_points.py b/bin/gen_points.py
new file mode 100755
index 0000000..57733dc
--- /dev/null
+++ b/bin/gen_points.py
@@ -0,0 +1,81 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Aaron LI
+# 2015/06/19
+
+"""
+Generate the required number of random points within the required region.
+"""
+
+__version__ = "0.1.0"
+__date__ = "2015/06/19"
+DEBUG = True
+
+import sys
+import argparse
+import random
+import time
+import re
+
+from rand.sphere import sphere_point
+from region.region import Region
+
+random.seed(time.time())
+
+
+def parse_region(regstring):
+    reg_par = re.sub(r"[(),]", " ", regstring).split()
+    regtype = reg_par[0].lower()
+    if regtype == "box":
+        xc = float(reg_par[1])
+        yc = float(reg_par[2])
+        width = parse_reg_value(reg_par[3])
+        height = parse_reg_value(reg_par[4])
+        rotation = float(reg_par[5])
+        reg = Region(regtype, xc=xc, yc=yc,
+                width=width, height=height, rotation=rotation)
+    else:
+        raise ValueError("region type '%s' currently not implemented" % regtype)
+    return reg
+
+
+def parse_reg_value(valstring):
+    if valstring[-1] == '"':
+        # arcsec -> deg
+        value = float(valstring.split('"')[0]) / 60.0 / 60.0
+    elif valstring[-1] == "'":
+        # arcmin -> deg
+        value = float(valstring.split("'")[0]) / 60.0
+    else:
+        value = float(valstring)
+    return value
+
+
+def main():
+    parser = argparse.ArgumentParser(
+            description="Generate random point within the given region.")
+    parser.add_argument("-V", "--version", action="version",
+            version="%(prog)s " + "%s (%s)" % (__version__, __date__))
+    parser.add_argument("-n", "--number", dest="number",
+            type=int, default=1,
+            help="number of points to be generated")
+    parser.add_argument("-r", "--region", dest="region", required=True,
+            help="DS9 region")
+    args = parser.parse_args()
+
+    reg = parse_region(args.region)
+    if DEBUG:
+        print("DEBUG: region: ", reg.dump(), file=sys.stderr)
+
+    points = []
+    while len(points) < args.number:
+        p = sphere_point(unit="deg")
+        if reg.is_inside(p):
+            points.append(p)
+            print("%s  %s" % p)
+
+
+if __name__ == "__main__":
+    main()
+
diff --git a/bin/img2list.py b/bin/img2list.py
new file mode 100644
index 0000000..48d0de4
--- /dev/null
+++ b/bin/img2list.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Aaron LI
+# 2015/06/23
+#
+
+
+import numpy as np
+from astropy.io import fits
+
+
+def img2list(imgdata, mask=None):
+    """
+    Convert a image matrix to list of point coordinates.
+    The input image matrix is taken as an integer matrix.
+    If one pixel has value n (>1), then it is repeated n times.
+    """
+    img = imgdata.astype(int)
+    points = []
+    ii, jj = np.nonzero(img >= 1)
+    while len(ii) > 0:
+        for i, j in zip(ii, jj):
+            points.append([i, j])
+        img[ii, jj] -= 1
+        ii, jj = np.nonzero(img >= 1)
+    return np.array(points)
+