AAF.cpp

#include "MyISP.h"
#include <math.h>

// RAW data processing
// anti-aliasing filter
void AAF(ImageRaw& raw)
{
	ImageRaw* raw_pad = new ImageRaw(raw);
	raw_pad->padding(2, PADDING_MODE_REFLECT);

	for (int y = 0; y < raw_pad->getHeight() - 4; y++) {
		for (int x = 0; x < raw_pad->getWidth() - 4; x++) {
			uint16_t p0, p1, p2, p3, p4, p5, p6, p7, p8;
			p0 = raw_pad->at(y + 2, x + 2);
			p1 = raw_pad->at(y, x);
			p2 = raw_pad->at(y, x + 2);
			p3 = raw_pad->at(y, x + 4);
			p4 = raw_pad->at(y + 2, x);
			p5 = raw_pad->at(y + 2, x + 4);
			p6 = raw_pad->at(y + 4, x);
			p7 = raw_pad->at(y + 4, x + 2);
			p8 = raw_pad->at(y + 4, x + 4);
			raw.at(y, x) = (p0 * 8 + p1 + p2 + p3 + p4 + p5 + p6 + p7 + p8) / 16.0;
		}
	}
	delete raw_pad;
}