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A technical guide to diagnosing and fixing CL_DEVICE_NOT_FOUND errors in OpenCL, covering ICD loader failures, driver mismatches, and Linux permission issues.
Global memory latency is often the real bottleneck in OpenCL kernels. This post explains the tiling pattern with a worked 1D blur kernel, barrier rules, and the occupancy trade-off that decides whether local memory actually helps.
Decide when to use OpenCV’s CPU or GPU resize: compare CPU, CUDA, and OpenCL options, weigh speed vs. portability, and see a ready‑to‑run C++ example with validation checks.
opencl