elliptical_overlap_grid¶

photutils.geometry.
elliptical_overlap_grid
(xmin, xmax, ymin, ymax, nx, ny, rx, ry, use_exact, subpixels)¶ Area of overlap between an ellipse and a pixel grid. The ellipse is centered on the origin.
 Parameters
 xmin, xmax, ymin, ymaxfloat
Extent of the grid in the x and y direction.
 nx, nyint
Grid dimensions.
 rxfloat
The semimajor axis of the ellipse.
 ryfloat
The semiminor axis of the ellipse.
 thetafloat
The position angle of the semimajor axis in radians (counterclockwise).
 use_exact0 or 1
If set to 1, calculates the exact overlap, while if set to 0, uses a subpixel sampling method with
subpixel
subpixels in each direction. subpixelsint
If
use_exact
is 0, each pixel is resampled by this factor in each dimension. Thus, each pixel is divided intosubpixels ** 2
subpixels.
 Returns
 frac
ndarray
2d array giving the fraction of the overlap.
 frac