init

vendor/code.google.com/p/graphics-go/graphics/detect/detect_test.go

@@ -0,0 +1,77 @@
+// Copyright 2011 The Graphics-Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package detect
+
+import (
+	"image"
+	"image/draw"
+	"testing"
+)
+
+var (
+	c0 = Classifier{
+		Feature: []Feature{
+			Feature{Rect: image.Rect(0, 0, 3, 4), Weight: 4.0},
+		},
+		Threshold: 0.2,
+		Left:      0.8,
+		Right:     0.2,
+	}
+	c1 = Classifier{
+		Feature: []Feature{
+			Feature{Rect: image.Rect(3, 4, 4, 5), Weight: 4.0},
+		},
+		Threshold: 0.2,
+		Left:      0.8,
+		Right:     0.2,
+	}
+	c2 = Classifier{
+		Feature: []Feature{
+			Feature{Rect: image.Rect(0, 0, 1, 1), Weight: +4.0},
+			Feature{Rect: image.Rect(0, 0, 2, 2), Weight: -1.0},
+		},
+		Threshold: 0.2,
+		Left:      0.8,
+		Right:     0.2,
+	}
+)
+
+func TestClassifier(t *testing.T) {
+	m := image.NewGray(image.Rect(0, 0, 20, 20))
+	b := m.Bounds()
+	draw.Draw(m, image.Rect(0, 0, 20, 20), image.White, image.ZP, draw.Src)
+	draw.Draw(m, image.Rect(3, 4, 4, 5), image.Black, image.ZP, draw.Src)
+	w := newWindow(m)
+	pr := newProjector(b, b)
+
+	if res := c0.classify(w, pr); res != c0.Right {
+		t.Errorf("c0 got %f want %f", res, c0.Right)
+	}
+	if res := c1.classify(w, pr); res != c1.Left {
+		t.Errorf("c1 got %f want %f", res, c1.Left)
+	}
+	if res := c2.classify(w, pr); res != c1.Left {
+		t.Errorf("c2 got %f want %f", res, c1.Left)
+	}
+}
+
+func TestClassifierScale(t *testing.T) {
+	m := image.NewGray(image.Rect(0, 0, 50, 50))
+	b := m.Bounds()
+	draw.Draw(m, image.Rect(0, 0, 8, 10), image.White, b.Min, draw.Src)
+	draw.Draw(m, image.Rect(8, 10, 10, 13), image.Black, b.Min, draw.Src)
+	w := newWindow(m)
+	pr := newProjector(b, image.Rect(0, 0, 20, 20))
+
+	if res := c0.classify(w, pr); res != c0.Right {
+		t.Errorf("scaled c0 got %f want %f", res, c0.Right)
+	}
+	if res := c1.classify(w, pr); res != c1.Left {
+		t.Errorf("scaled c1 got %f want %f", res, c1.Left)
+	}
+	if res := c2.classify(w, pr); res != c1.Left {
+		t.Errorf("scaled c2 got %f want %f", res, c1.Left)
+	}
+}