RESAMPLE WITH PHOTOSHOP INTERPOLATION

Interpolation options

 WE RUN THROUGH THE WAYS TO MASTER YOUR IMAGE PIXELS WITH PHOTOSHOP RESIZING TECHNOLOGY

Photoshop deals in raster images, which are built from multiple physical points that we refer to as pixels. These are essentially single points of colour, with each image produced having a fixed number of pixels available.

When you make an image or element larger or smaller, youeffectively asking Photoshop to find ways to add pixels that arenthere or intuitively subtract them. This can sometimes become a serious issue, affecting image quality if youunaware of the limitations of the software.

By following the correct procedures you can easily optimise your outcomes, most importantly through related Interpolation options. In Photoshop CS6 these can be found in the overhead menu, when resizing with the Move tool.

These Interpolation dropdown options include: Nearest Neighbour, Bilinear, Bicubic variants, Smoother, Sharper and the new Bicubic Automatic that repairs pixels for the best results. However these options arenavailable in versions pre-dating Photoshop CS6. Instead users can access options from two locations —Photoshop Preferences>General>lmage Interpolation and Image Size>Resample Image. Both are still available in CS6, but for those not yet confident with this latest version, weshow you how these work, explaining which is best for each situation.

Interpolation options

BILINEAR

Open Preferences (Cmd/Ctrl+K) and set Image Interpolation to Bilinear or select it from the Interpolation options at the top of the interface. This calculates four surrounding pixels, averaging the colour values of these. It s great for small amendments to scale, but can create a blurring.

BICUBIC SMOOTHER AND SHARPER

Bicubic is a more precise method, producing smoother tonal gradations by sampling from 16 surrounding pixels. The Smoother setting will improve more dramatic upsizing, while Sharper holds in the detail when descaling. This can sometimes result in too much sharpening.

RESAMPLE SIZE

This option can be set according to the conditions of your resizing (see Step 2), found at the foot of the lmage>lmage Size panel. It s best to interpolate here in small increments, setting Document Size to Percent, increasing or decreasing by values of 10 (Percent).

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