imgproc_engine_design

• Design documents for OpenCV OE-17.
• No source code for compilation.
• Only Markdown docs with small code snippets.

---

About OpenCV OE-17

• Evolution Proposal OE-16: Mini-Halide Discussion thread on issue 11011
• Evolution Proposal OE-17: New Filter Engine Discussion thread on issue 11012

---

Scope of Image Processing Engine

• Classification of image filters by dataflow patterns

---

My approaches

• My approach to fixed window size filtering
• My approach to resampling (resizing) without rotation

---

The combined list of elements of implementation

(This list may be incomplete. All items are copied from the sub-pages. Internal links may be broken. Please make edits on the sub-page first, and then copy the changes to this list.)

• Dynamically-sized memory pool for row buffers
• An outermost loop responsible for:
  • "scheduling",
  • "cascading", and
  • "multi-worker parallelization"
• SIMD programming styles
  • Explicit SIMD
    • Raw (using vendor-specific intrinsics, or vendor-agnostic wrappers)
    • Syntactically improved, to improve code maintenance and user-friendliness
  • Row-level vectorization without explicit SIMD

---