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Image Resizing

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Tencent Music Tech Team
Tencent Music Tech Team
Sep 15, 2023 · Mobile Development

Parsing and Using NinePatch PNG Images for Resizable UI Elements

The article explains how to create, parse, and use NinePatch (.9.png) images by extracting the custom “npTc” chunk from a PNG file, building a PNGNinePatch object in Objective‑C, and converting its stretchable region data into UIEdgeInsets for resizable iOS UI elements.

AndroidCapInsetsImage Resizing
0 likes · 13 min read
Parsing and Using NinePatch PNG Images for Resizable UI Elements
Tencent Music Tech Team
Tencent Music Tech Team
Nov 10, 2017 · Mobile Development

Image Resizing Techniques on Android: Nearest‑Neighbour, Bilinear, Bicubic, and Lanczos Resampling

The article explains Android image downsampling, comparing built‑in nearest‑neighbour and bilinear methods with higher‑quality bicubic and Lanczos resampling, detailing their implementation, performance trade‑offs, and visual results, and advises choosing the fastest method for simple cases or the more intensive algorithms when superior image fidelity is required.

AndroidBicubicBilinear
0 likes · 10 min read
Image Resizing Techniques on Android: Nearest‑Neighbour, Bilinear, Bicubic, and Lanczos Resampling