- update to 4.6.0, highlights below, for details check
https://github.com/opencv/opencv/wiki/ChangeLog#version460
* OpenCV project infrastructure migrating on GitHub Actions
workflows for CI and release purposes
* Added support for GCC 12, Clang 15
* Added support for FFmpeg 5.0
* DNN module patches:
+ Improved layers / activations / supported more models:
- LSTM (+CUDA), resize (+ONNX13), Sign, Shrink, Reciprocal,
depth2space, space2depth
- fixes in Reduce, Slice, Expand
+ Disabled floating-point denormals processing #21521
+ Changed layer names in ONNX importer to support "output"
entities properly
+ Added TIM-VX NPU backend support:
https://github.com/opencv/opencv/wiki/TIM-VX-Backend-For-Running-OpenCV-On-NPU
+ Added Softmax parameter to ClassificationModel
+ Added audio speech recognition sample (C++) #21458
+ Intel® Inference Engine backend (OpenVINO):
- added initial support for OpenVINO 2022.1 release
- removed support of legacy API (dropped since 2020.3)
* G-API module:
+ G-API framework:
- Introduced a Grayscale image format support for
cv::MediaFrame: #21511;
- Enabeled .reshape() support in the CPU backend: #21669;
- Fixed possible hang in streaming execution mode with constant
inputs: #21567;
- Introduced proper error/exception propagation in the
asynchronous streaming execution mode: #21660;
- Fixed new stream event handling: #21731.
+ Fluid backend:
- Fixed horizontal pass in the Resize kernel, fixed Valgrind
issues: #21144;
- Extended Resize kernel with F32 version: #21678,
added AVX: #21728.
- Enabled dynamic dispatch for Split4 kernel: #21520;
- Enabled dynamic dispatch for Merge3 kernel: #21529;
- Added a SIMD version for DivC kernel: #21474;
- Added a SIMD version for DivRC kernel: #21530;
- Enabled dynamic dispatch for Add kernel: #21686;
- Enabled dynamic dispatch for Sub kernel: #21746;
- Added a SIMD version for ConvertTo kernel: #21777;
- Fixed kernel matrix size for Sobel kernel: #21613.
+ Intel® OpenVINO™ inference backend:
- Fixed NV12 format support for remote memory when OpenVINO
remote context is used: #21424.
- Implemented correct error handling in the backend: #21579.
- Fixed ngraph warnings #21362.
+ OpenCV AI Kit backend:
- Introduced a new backend to program OpenCV AI Kit boards via
G-API. Currently the backend is in experimental state, but allows
to build Camera+NN pipeline and supports heterogeneity (mixing
with host-side code): #20785, #21504.
+ Media integration:
- Enabled GPU inference with oneVPL and DirectX11 on Windows in
Intel OpenVINO inference backend: #21232, #21618, #21658, #21687,
#21688. Now GPU textures decoded by oneVPL decoder can be
preprocessed and inferred on GPU with no extra host processing.
- Enabled oneVPL support on Linux: #21883.
- Extended GStreamer pipeline source with Grayscale image format
support: #21560.
+ Python bindings:
- Exposed GStreamer pipeline source in Python bindings: #20832.
- Fixed Python bindings for CudaBufferPool, cudacodec and cudastereo
modules in OpenCV Contrib.
+ Samples:
- Introduced a pipeline modelling tool for cascaded model
benchmarking: #21477, #21636, #21719. The tool supports a
declarative YAML-based config to describe pipelines with simulated
pre-/post-processing. The tool collects and reports latency and
throughput information for the modelled pipeline.
+ Other changes and fixes:
- Moved GKernelPackage into cv:: namespace by default, its cv::gapi::
alias remain for compatibility: #21318;
- Moved Resize kernel from core to imgproc kernel packages for
CPU, OpenCL, and Fluid backends: #21157. Also moved tests
appropriately: #21475;
- Avoided sporadic test failures in DivC: #21626;
- Fixed 1D Mat handling in the framework: #21782;
- Reduced the number of G-API generated accuracy tests: #21909.
- Drop upstream patches:
* 0001-highgui-Fix-unresolved-OpenGL-functions-for-Qt-backe.patch
* videoio_initial_FFmpeg_5_0_support.patch
* videoio_ffmpeg_avoid_memory_leaks.patch