Use CPU resize before upload to GPU to remove PCIe bottleneck

2026-04-04 22:29:08 +11:00
parent e134ebdf15
commit 98681f4da6
15 changed files with 572 additions and 493 deletions
--- a/modules/ANSOCR/ANSRTOCR/RTOCRDetector.cpp
+++ b/modules/ANSOCR/ANSRTOCR/RTOCRDetector.cpp
@@ -178,10 +178,10 @@ std::vector<TextBox> RTOCRDetector::Detect(const cv::Mat& image,
        }

        if (!usedNV12) {
-            // Fallback: standard BGR upload
-            cv::cuda::GpuMat gpuImg;
-            gpuImg.upload(image);
-            cv::cuda::resize(gpuImg, gpuResized, resizeShape);
+            // Fallback: CPU resize then upload small image to GPU
+            cv::Mat cpuResized;
+            cv::resize(image, cpuResized, resizeShape, 0, 0, cv::INTER_LINEAR);
+            gpuResized.upload(cpuResized);
        }

        // Keep BGR order (PaddleOCR official does NOT convert BGR->RGB)