scalergb

romanisim.util.scalergb(rgb, scales=None, gray=0)

Scales three flux images into an RGB image for displaying.

Images are scaled into [0, 1]. This routine was borrowed from the Legacy Survey viewer. It expects background subtracted images.

Parameters:

rgbnp.ndarray[ny, nx, 3]

the RGB images to scale

scaleslist[float] (must contain 3 floats)

rescale each image by this amount

grayfloat

add a constant to the image to shift the sky background value from 0 to gray

Returns:

imnp.ndarray[ny, nx, 3]

scaled RGB image suitable for displaying