NAME: bpass PURPOSE: Implements a real-space bandpass filter which suppress pixel noise and long-wavelength image variations while retaining information of a characteristic size. CATEGORY: Image Processing CALLING SEQUENCE: res = bpass( image, lnoise, lobject ) INPUTS: image: The two-dimensional array to be filtered. lnoise: Characteristic lengthscale of noise in pixels. Additive noise averaged over this length should vanish. MAy assume any positive floating value. lobject: A length in pixels somewhat larger than a typical object. Must be an odd valued integer. OUTPUTS: res: filtered image. PROCEDURE: simple wavelet convolution yields spatial bandpass filtering. NOTES:

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