Documentation on xpeak

Task: xpeak
Purpose: Calculate peak brightness in a miriad cube
Categories: image analysis

        XPEAK calculates the peak brightness image for a Miriad cube. 
        Currently only the peak along the third axis is calculated for 
        3 dimensional images.
        To obtain the peaks for other axes use the task REORDER to reorder
        the axes.

Key: in
        The input image. No default.

Key: region
        The region of the input image to be used. See documentation for region
        on how to specify this. Only the bounding box is supported.

Key: out
        The peak image. No default.

Key: clip
        Two values. Exclude pixels with values in the range clip(1) to clip(2).
        If only one value is given, then exclude -abs(clip) to abs(clip).