Simple and Fast Image Processing with RenderScript
summary
Demonstrates using Android Renderscript to speed up image processing: shows concrete performance gains (e.g., blur from ~4s in Java to ~500ms in Renderscript; an HDR‑style auto‑enhance from ~15s to <1s on Pixel and ~90% of devices) and explains memory savings by using Allocations to avoid duplicate 46MB bitmaps. Provides the actual .rs kernel code pattern, how to call intrinsics and custom kernels from Java, and includes a shipped library implementing fast ripple/elevation image effects.
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chapters (11)
- 0:00Introduction
- 2:58Classic image problems
- 4:49RenderScript as solution
- 6:57Simple RenderScript example
- 9:04RenderScript intrinsics
- 10:06Custom vignette script
- 13:18Java code generation
- 13:39Auto image enhancement
- 17:10RenderScript beyond images
- 17:53Summary
- 18:18Q&A
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