OpenCV 4.5.5 Release Highlights and New Features
OpenCV 4.5.5 introduces audio support in VideoCapture, updates SOVERSION handling, adds OpenVINO 2021.4.2 LTS compatibility, expands ONNX test coverage, upgrades protobuf, optimizes for RISC‑V, and enhances the G‑API module with numerous vectorized kernels, SIMD scheduling, and various bug fixes.
OpenCV is Intel's open‑source computer‑vision library. Version 4.5.5 brings a collection of updates across several modules.
VideoCapture API now supports audio (MSMF #19721 + GStreamer #21264).
SOVERSION handling rules updated (#21178).
DNN module patches: Support for OpenVINO 2021.4.2 LTS. Added tests covering the ONNX consistency test suite (#21088). Protobuf upgraded from 3.5.2 to 3.19.1. Additional optimizations for the RISC‑V platform. Intel OpenVINO related improvements.
G‑API module enhancements: Static‑analysis issues fixed for OpenVINO 2021.4. Build warnings introduced by OpenVINO updates resolved. GTest macro and test data cleanup in the G‑API test suite. Custom precision‑comparison function added for Fluid performance tests. Improved vector version of Resize . Vectorized kernels added: Multiply, Divide, AddC, SubC, MulC, SubRC. SIMD scheduling enabled for AbsDiffC . Fixed 1‑D data access issue from cv::Rmat . Restricted passing G‑API types to graphic I/O for execution. Renamed various internal structures for consistency.
Additional G‑API framework and Fluid backend changes (details omitted for brevity).
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