[self findstart:&startBarcode end:&endBarcode forLine:greenScalePixels derivative:greenDerivative centerAt:xAxisCenterPoint min:&minValue max:&maxValue];

[self findstart:&startBarcode
            end:&endBarcode
        forLine:greenScalePixels
     derivative:greenDerivative
       centerAt:xAxisCenterPoint
            min:&minValue
            max:&maxValue];