func TestCorrBLAS_vsNaive(t *testing.T) { const ( m = 40 n = 30 w = 100 h = 80 eps = 1e-9 ) f := randImage(w, h) g := randImage(m, n) naive, err := slide.CorrNaive(f, g) if err != nil { t.Fatal(err) } blas, err := slide.CorrBLAS(f, g) if err != nil { t.Fatal(err) } if !naive.Size().Eq(blas.Size()) { t.Fatalf("size mismatch (naive %v, blas %v)", naive.Size(), blas.Size()) } if err := errIfNotEqImage(naive, blas, eps); err != nil { t.Fatal(err) } }
func TestCorrNaive(t *testing.T) { const eps = 1e-9 f := rimg64.FromRows([][]float64{ {1, 2, 3, 4, 5}, {2, 5, 4, 1, 3}, {5, 4, 3, 2, 1}, }) g := rimg64.FromRows([][]float64{ {3, 1, 5}, {2, 4, 1}, }) cases := []struct { I, J int Want float64 }{ // <g, [1 2 3; 2 5 4]> {0, 0, 3*1 + 1*2 + 5*3 + 2*2 + 4*5 + 1*4}, // <g, [2 3 4; 5 4 1]> {1, 0, 3*2 + 1*3 + 5*4 + 2*5 + 4*4 + 1*1}, // <g, [3 4 5; 4 1 3]> {2, 0, 3*3 + 1*4 + 5*5 + 2*4 + 4*1 + 1*3}, // <g, [2 5 4; 5 4 3]> {0, 1, 3*2 + 1*5 + 5*4 + 2*5 + 4*4 + 1*3}, // <g, [5 4 1; 4 3 2]> {1, 1, 3*5 + 1*4 + 5*1 + 2*4 + 4*3 + 1*2}, // <g, [4 1 3; 3 2 1]> {2, 1, 3*4 + 1*1 + 5*3 + 2*3 + 4*2 + 1*1}, } h, err := slide.CorrNaive(f, g) if err != nil { t.Fatal(err) } if h.Width != 3 || h.Height != 2 { t.Fatalf("wrong size: want %dx%d, got %dx%d", 3, 2, h.Width, h.Height) } for _, c := range cases { if got := h.At(c.I, c.J); math.Abs(got-c.Want) > eps { t.Errorf( "not equal: (i, j) = (%d, %d): want %.5g, got %.5g", c.I, c.J, c.Want, got, ) } } }
func TestCorrStrideNaive_vsDecimate(t *testing.T) { const eps = 1e-9 for _, q := range strideCases { f := randImage(q.ImSize.X, q.ImSize.Y) g := randImage(q.TmplSize.X, q.TmplSize.Y) h, err := slide.CorrNaive(f, g) if err != nil { t.Errorf("im %v, tmpl %v, stride %d: %v", q.ImSize, q.TmplSize, q.K, err) continue } want := slide.Decimate(h, q.K) got, err := slide.CorrStrideNaive(f, g, q.K) if err != nil { t.Errorf("im %v, tmpl %v, stride %d: %v", q.ImSize, q.TmplSize, q.K, err) continue } if err := errIfNotEqImage(want, got, eps); err != nil { t.Errorf("im %v, tmpl %v, stride %d: %v", q.ImSize, q.TmplSize, q.K, err) continue } } }