code: public static void minimum(Planar<GrayF64> input, GrayF64 output) {
  		output.reshape(input.width,input.height);
  		if (BoofConcurrency.USE_CONCURRENT) {
  			ImplImageBandMath_MT.minimum(input, output, 0, input.getNumBands() - 1);
  		} else {
  			ImplImageBandMath.minimum(input, output, 0, input.getNumBands() - 1);
  		}
  	}
docs: Computes the minimum for each pixel across all bands in the {@link Planar} image.
  
  @param input     Planar image
  @param output    Gray scale image containing minimum pixel values