public void eStepTest()
{
const int w = 4;
const int h = 4;
using (var bmp = createBitmap(w, h))
{
var config = new ContenteBaseDownscaleUtils.Config(w, h, 2, 2);
var downscaler = new ContentAdaptiveDonwscaling();
downscaler.AsDynamic().initialize(config, bmp);
downscaler.AsDynamic().eStep(config);
var ws = downscaler.AsDynamic().w_;
Assert.IsTrue(ws[0][2 + 9 * 2] == 0);
Assert.IsTrue(ws[0][2 + 9 * 3] == 0);
Assert.IsTrue(ws[0][3 + 9 * 2] == 0);
Assert.IsTrue(ws[0][3 + 9 * 3] > 0);
double sum = 0;
foreach (var val in ws[0])
{
sum += val;
}
Assert.AreEqual(sum, 1.0, 1e-4);
var gs = downscaler.AsDynamic().g_;
Assert.IsTrue(gs[0][2 + 9 * 2] == 0);
Assert.IsTrue(gs[0][2 + 9 * 3] == 0);
Assert.IsTrue(gs[0][3 + 9 * 2] == 0);
Assert.IsTrue(gs[0][3 + 9 * 3] > 0);
}
}
public void mStepTest()
{
const int w = 16;
const int h = 12;
using (var bmp = createBitmap(w, h))
{
var config = new ContenteBaseDownscaleUtils.Config(w, h, 4, 4);
var downscaler = new ContentAdaptiveDonwscaling();
downscaler.AsDynamic().initialize(config, bmp);
downscaler.AsDynamic().eStep(config);
downscaler.AsDynamic().mStep(config);
}
}
public void calcGaussianTest()
{
const int w = 4;
const int h = 4;
using (var bmp = createBitmap(w, h))
{
var config = new ContenteBaseDownscaleUtils.Config(w, h, 2, 2);
var downscaler = new ContentAdaptiveDonwscaling();
downscaler.AsDynamic().initialize(config, bmp);
double val = Math.Max(-1e2, Math.Min(1e2, -0.5 * 3.0 - 1.5 * 1e8));
var want = Math.Exp(val);
var got = downscaler.AsDynamic().calcGaussian(
new ContenteBaseDownscaleUtils.Kernel(config, 0, 0),
new ContenteBaseDownscaleUtils.Position(config, 0, 0));
Assert.AreEqual(want, got, 1e-8);
}
}
public void initializeTest()
{
const int w = 16;
const int h = 12;
using (var bmp = createBitmap(w, h))
{
var config = new ContenteBaseDownscaleUtils.Config(w, h, 4, 4);
var downscaler = new ContentAdaptiveDonwscaling();
downscaler.AsDynamic().initialize(config, bmp);
Assert.AreEqual(downscaler.AsDynamic().w_.Count, 16);
foreach (var wk in downscaler.AsDynamic().w_)
{
// rx = 4, ry = 3
// (4rx + 1) * (4ry + 1) = 17 * 13 = 221
Assert.AreEqual(wk.Length, 221);
}
Assert.AreEqual(downscaler.AsDynamic().g_.Count, 16);
foreach (var gk in downscaler.AsDynamic().g_)
{
Assert.AreEqual(gk.Length, 221);
}
Assert.AreEqual(downscaler.AsDynamic().m.Length, 16);
foreach (var val in downscaler.AsDynamic().m)
{
Assert.AreEqual(val.x % 4, 2.0, 1e-4);
Assert.AreEqual(val.y % 3, 1.5, 1e-4);
}
Assert.AreEqual(downscaler.AsDynamic().S.Length, 16);
foreach (var val in downscaler.AsDynamic().S)
{
Assert.AreEqual(val.m11, 1.3333333, 1e-4);
Assert.AreEqual(val.m12, 0);
Assert.AreEqual(val.m21, 0);
Assert.AreEqual(val.m22, 1.0, 1e-4);
}
Assert.AreEqual(downscaler.AsDynamic().v.Length, 16);
foreach (var val in downscaler.AsDynamic().v)
{
Assert.AreEqual(val.x, 0.5);
Assert.AreEqual(val.y, 0.5);
Assert.AreEqual(val.z, 0.5);
}
Assert.AreEqual(downscaler.AsDynamic().s.Length, 16);
foreach (var val in downscaler.AsDynamic().s)
{
Assert.AreEqual(val, 1e-4);
}
}
}