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| p.1 #3 · Two step reduction and sharpening technique for web only |
Yep, the two step method was popularized before Adobe refined the Bicubic Interpolation routines in Photoshop. Similarly popular was the Stair interpolation method for enlarging photos where the size was increased in 10% increments. But since Photoshop CS - when Bicubic Sharper and Smoother were introduced - these methods are more or less obsolete.
Also, the introduction of Camera Raw with its simplified edge sharpening and masking algorithms and the ability to process rendered files (JPEG, TIFF, PSD) in ACR made these methods less popular.