protected override Expression CreateExpression(Type typeElement)
{
var array = Expression.Variable(typeElement.MakeArrayType(), "array");
var avg = Expression.Variable(typeElement, "avg");
var mid = Expression.Variable(typeElement, "mid");
//var w = Expression.Variable(typeof(double), "w");
var c = Expression.Variable(typeof(double), "c");
var b = Expression.Variable(typeof(double), "b");
Expression[] expressions = new Expression[] // avg != 0
{
ExpCalculateTmpArray(array), // Подготовить одномерный массив для ядра
avg.Assign(ExpressionExtends.ArraySum(array, CoreHeight * CoreWidth)
.Div(CoreHeight * CoreWidth)), // Среднее
mid.Assign(ExpMid()), // Центр матрицы
b.Assign(Aqd), // Параметр
c.Assign(mid.Sub(avg).Div(avg).Abs()), // c = (mid - avg) / avg
c.NotEqual(Expression.Default(c.Type)) // return c != 0
.Condition(
// ? (1.0 - b * b / c) / (b * b + 1.0)
// * src[mid] .Limit(0, 255)
Expression.Constant(1.0).Sub(b.Mul(b).Div(c)).Div(b.Mul(b).Add(1))
.Mul(mid).Limit(0, 255).FixType(typeElement),
// : (0)
Expression.Constant(Expression.Default(typeElement))),
};
return(Expression.Block(new[] { array, avg, mid, c, b }, expressions));
}
protected override Expression CreateExpression(Type typeElement)
{
var array = Expression.Variable(typeElement.MakeArrayType(), "array");
return(Expression.Block(new[] { array }, new Expression[]
{
ExpCalculateTmpArray(array), // Подготовить одномерный массив
ExpressionExtends.ArraySum(array, CoreWidth * CoreHeight)
.Div(CoreWidth * CoreHeight) // Найти среднее
})); // Последнее выражение блока будет результатом окна фильтра
}
protected override Expression CreateExpression(Type typeElement)
{
//size_t average = 0;
//for (int k = -lengthSize; k <= lengthSize; k++)
// for (int m = -widthSize; m <= widthSize; m++)
// average += Image[i + k][j + m];
//average /= size;
//double W = 0.0;
//double top, bottom;
//top = (double)((Image[i][j] - average) * (Image[i][j] - average)) - (double)(b * b * average * average);
//bottom = (double)((Image[i][j] - average) * (Image[i][j] - average)) - (double)(b * b * b * b * average * average);
//if (bottom != 0)
// W = top / bottom;
//// W = 1;
//if (RoundTo(Image[i][j] * W, 0) + RoundTo(average * (1 - W), 0) >= 0 &&
//RoundTo(Image[i][j] * W, 0) + RoundTo(average * (1 - W), 0) <= 255)
// image[i][j] = RoundTo(Image[i][j] * W, 0) + RoundTo(average * (1 - W), 0);
//else if (RoundTo(Image[i][j] * W, 0) + RoundTo(average * (1 - W), 0) < 0)
// image[i][j] = 0;
//else
// image[i][j] = 255;
Type type;
TypeCode tc = Type.GetTypeCode(typeElement);
if (tc < TypeCode.Int32)
{
type = typeof(int);
}
else
{
type = typeElement;
}
var array = Expression.Variable(typeElement.MakeArrayType(), "array");
var avg = Expression.Variable(type, "avg");
var avgx = Expression.Variable(type, "avgMulAvg");
var w = Expression.Variable(typeof(double), "w");
var top = Expression.Variable(typeof(double), "top");
var bot = Expression.Variable(typeof(double), "bottom");
var mid = Expression.Variable(type, "mid");
var midSubAvg = Expression.Variable(type, "midSubAvg");
var midSubAvgx = Expression.Variable(typeof(double), "midSubAvgx");
var b = Expression.Variable(typeof(double), "aqd");
var bb = Expression.Variable(typeof(double), "aqdMulAqd");
BlockExpression blockExpression;
ConditionalExpression conditionalExpression;
List <Expression> expressions = new List <Expression>
{
ExpCalculateTmpArray(array),
// avg = Средняя арифмитическое всех элементов окна;
Expression.Assign(avg, ExpressionExtends.ArraySum(array, CoreWidth * CoreHeight)
.Div(CoreWidth * CoreHeight).FixType(type)),
Expression.Assign(avgx, avg.Mul(avg)),
Expression.Assign(b, Expression.Constant(Aqd)),
Expression.Assign(bb, b.Mul(b)),
// mid = центральный элемент окна;
Expression.Assign(mid, ExpMid().FixType(type)),
Expression.Assign(midSubAvg, mid.Sub(avg)),
Expression.Assign(midSubAvgx, midSubAvg.Mul(midSubAvg).FixType(typeof(double))),
// top = ((mid - avg) * (mid - avg)) - (aqd * aqd * avg * avg);
Expression.Assign(top, midSubAvgx.Sub(bb.Mul(avgx))),
// bot = ((mid - avg) * (mid - avg)) - (aqd ^ 4 * avg ^ 4);
Expression.Assign(bot, midSubAvgx.Sub(bb.Mul(bb).Mul(avgx).Mul(avgx))),
// w = bot != 0 ? top / bot : 0;
Expression.Assign(w, Expression.Condition(bot.NotEqual(Expression.Constant(0.0)),
top.Div(bot), Expression.Constant(0.0))),
// return (mid * w) + mid * (1 - w);
mid.Mul(w).Add(mid.Mul(Expression.Constant(1.0).Sub(w))).Limit(0, 255)
};
return(Expression.Block(new[] { array, avg, avgx, w, top, bot, mid, midSubAvg, midSubAvgx, b, bb }, expressions));
//expressions.Add(Expression.Condition(bot.NotEqual(Expression.Constant(0)), top.Div(bot), Expression.Constant(0)));
//return Expression.Block(new[] { mid, top, bot, d1, d2, current }, expressions);
}