API Reference: CubicResampler

CubicResampler is a type of SamplingMode used for high-quality image scaling using bicubic interpolation.

Overview

A cubic resampler is defined by two parameters, B and C, which control the shape of the cubic filter. Different values result in different characteristics (sharpness, ringing, etc.).

Constants

CubicResampler provides two commonly used presets:

• CubicResampler.MITCHELL: (B=1/3, C=1/3). A good balance between sharpness and artifacts.
• CubicResampler.CATMULL_ROM: (B=0, C=1/2). Sharper than Mitchell, often used for downscaling.

Parameters

• B (Blur): Controls the "blurriness" of the filter.
• C (Ringing): Controls the "ringing" or "halos" around edges.

Usage

// Use Mitchell resampler for high-quality scaling
canvas.drawImageRect(image, dstRect, CubicResampler.MITCHELL, null);

// Custom resampler
CubicResampler custom = new CubicResampler(0.2f, 0.4f);
canvas.drawImageRect(image, dstRect, custom, paint);

References

• "Reconstruction Filters in Computer Graphics" (Mitchell & Netravali, 1988).
• Bicubic Filtering Overview