NAME: imqual PURPOSE: Generate a ``grade'' for image quality of input image. DESCRIPTION: CATEGORY: CCD data processing CALLING SEQUENCE: imqual,im,thresh,smofac,grade,usmim INPUTS: im - The input image, 2-D only thus far. thresh - Fraction of peak in image that is considered for grading. smofac - Smoothing factor for the unsharp masked image. OPTIONAL INPUT PARAMETERS: KEYWORD INPUT PARAMETERS: OUTPUTS: grade - Grade, 0 is bad, bigger is better. Units are arbitrary usmim - The unsharp masked image. KEYWORD OUTPUT PARAMETERS: COMMON BLOCKS: SIDE EFFECTS: RESTRICTIONS: PROCEDURE: MODIFICATION HISTORY: 94/08/16 - Written by Marc W. Buie, Lowell Observatory.