feat(ndcv-bridge): add ndcv-bridge for ndarray and opencv interaction

ndcv-bridge/benches/conversions.rs

@@ -0,0 +1,75 @@
+use divan::black_box;
+use ndcv_bridge::*;
+
+// #[global_allocator]
+// static ALLOC: AllocProfiler = AllocProfiler::system();
+
+fn main() {
+    divan::main();
+}
+
+#[divan::bench]
+fn bench_3d_mat_to_ndarray_512() {
+    bench_mat_to_3d_ndarray(512);
+}
+
+#[divan::bench]
+fn bench_3d_mat_to_ndarray_1024() {
+    bench_mat_to_3d_ndarray(1024);
+}
+
+#[divan::bench]
+fn bench_3d_mat_to_ndarray_2k() {
+    bench_mat_to_3d_ndarray(2048);
+}
+
+#[divan::bench]
+fn bench_3d_mat_to_ndarray_4k() {
+    bench_mat_to_3d_ndarray(4096);
+}
+
+#[divan::bench]
+fn bench_3d_mat_to_ndarray_8k() {
+    bench_mat_to_3d_ndarray(8192);
+}
+
+#[divan::bench]
+fn bench_3d_mat_to_ndarray_8k_ref() {
+    bench_mat_to_3d_ndarray_ref(8192);
+}
+
+#[divan::bench]
+fn bench_2d_mat_to_ndarray_8k_ref() {
+    bench_mat_to_2d_ndarray(8192);
+}
+
+fn bench_mat_to_2d_ndarray(size: i32) -> ndarray::Array2<u8> {
+    let mat =
+        opencv::core::Mat::new_nd_with_default(&[size, size], opencv::core::CV_8UC1, (200).into())
+            .expect("failed");
+    let ndarray: ndarray::Array2<u8> = mat.as_ndarray().expect("failed").to_owned();
+    ndarray
+}
+
+fn bench_mat_to_3d_ndarray(size: i32) -> ndarray::Array3<u8> {
+    let mat = opencv::core::Mat::new_nd_with_default(
+        &[size, size],
+        opencv::core::CV_8UC3,
+        (200, 100, 10).into(),
+    )
+    .expect("failed");
+    // ndarray::Array3::<u8>::from_mat(black_box(mat)).expect("failed")
+    let ndarray: ndarray::Array3<u8> = mat.as_ndarray().expect("failed").to_owned();
+    ndarray
+}
+
+fn bench_mat_to_3d_ndarray_ref(size: i32) {
+    let mut mat = opencv::core::Mat::new_nd_with_default(
+        &[size, size],
+        opencv::core::CV_8UC3,
+        (200, 100, 10).into(),
+    )
+    .expect("failed");
+    let array: ndarray::ArrayView3<u8> = black_box(&mut mat).as_ndarray().expect("failed");
+    let _ = black_box(array);
+}