make_lupton_rgb

astropy.visualization.make_lupton_rgb(image_r, image_g, image_b, minimum=0, stretch=5, Q=8, filename=None)[source]

Return a Red/Green/Blue color image from up to 3 images using an asinh stretch. The input images can be int or float, and in any range or bit-depth.

For a more detailed look at the use of this method, see the document Creating color RGB images.

Parameters
image_rndarray

Image to map to red.

image_gndarray

Image to map to green.

image_bndarray

Image to map to blue.

minimumfloat

Intensity that should be mapped to black (a scalar or array for R, G, B).

stretchfloat

The linear stretch of the image.

Qfloat

The asinh softening parameter.

filenamestr

Write the resulting RGB image to a file (file type determined from extension).

Returns
rgbndarray

RGB (integer, 8-bits per channel) color image as an NxNx3 numpy array.