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// 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)
}
}
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