imstar

#define NSTATPIX 25 /* Stats are computed for + this many pixels */ #define ISTATPIX 10 /* Stats are computed every this many pixels */ #define MAXWALK 20 /* Farthest distance to walk from seed */ #define BURNEDOUT 0 /* Clamp pixels brighter than this, if > 0 */ #define NITERATE 5 /* Number of iterations for sigma clipping */ #define STARSIGMA 5.0 /* Stars must be this many sigmas above mean */ #define BORDER 10 /* Ignore this much of the edge */ #define MAXRAD 20 /* Maximum radius for a star */ #define MINRAD 1 /* Minimum radius for a star */ #define MINPEAK 10 /* Minimum peak for a star */ #define MINSEP 10 /* Minimum separations for stars */
nstatpix=int
or nspix=int  for the number of pixels used to compute mean pixel value and standard deviation for detection. 
istatpix=int
or ispix=int  for the frequency at which the mean and standard deviation are recomputed. 
maxwalk=int  for the maximum number of pixels the program can move from a pixel detected to be a local peak toward a brighter one. 
burnedout=num  for the pixel value at or above which the pixel is assumed to be saturated, and thus an unreliable peak. 
niterate=int
or niter=int  for the number of iterations to sigmaclip each computation of a local mean. 
starsig=num  for the number of standard deviations above the local mean a pixel must be to signal a possible star detection. 
border=int  for the number of pixels in from each edge of the image to ignore in the star search. 
maxrad=int  for the maximum radius in pixels to be used to find the center of a star. 
minrad=int  for the minimum radius in pixels of a possible 
minpeak=num  for the minimum value a pixel must have to qualifty as a possible star. This test precedes the test for whether the pixel value meets the starsig test. 
minsep=int  for the minimum distance in pixels a possible star must be from an alreadydiscovered star. 