최다인/BilinearInterpolation - Revision history

1.236.163.157 at 03:16, 26 March 2017

2017-03-26T03:16:14Z

← Older revision		Revision as of 03:16, 26 March 2017
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	* 2014년 4월 3일 개발		DeleteThisPage
	* 문제 : http://cau.ac.kr/~bongbong/c12/ -> Homework #4 -> Prob2. [[Bilinear Interpolation]]
	~~#include <stdio.h>~~
	~~#include <stdlib.h>~~

	~~#pragma warning(disable:4996)~~

	~~int computePosition(float, float);~~
	~~float bilinearInterpolation(float*, float, float, int);~~

	~~int main()~~
	{
	~~float xValue, yValue, a, b;~~
	~~float pointValue[25];~~
	~~int i, position;~~

	~~printf("two float values x and y (ex: 0.5 1.0) : ");~~
	~~scanf("%f %f",&xValue,&yValue);~~
	~~printf("25 float values for the values at 25 grid points (ex: 1.0 3.5 ...)\n: ");~~
	~~for(i = 0; i < 25; i++)~~
	~~scanf("%f",&pointValue[i]);~~

	~~position = computePosition(xValue, yValue);~~
	~~a = xValue - (int)xValue;~~
	~~b = yValue - (int)yValue;~~

	~~printf("The Value at the coordinate (x,y) is %.3f\n",bilinearInterpolation(pointValue, a, b, position));~~

	~~system("pause");~~
	~~return 0;~~
	}

	~~int computePosition(float xValue, float yValue)~~
	{
	~~int xposition = (int)xValue + 5*(int)yValue;~~
	~~if(xposition%5 == 4)~~
	~~xposition--;~~
	~~if(xposition>=20)~~
	~~xposition-=5;~~
	~~return xposition;~~
	}

	~~float bilinearInterpolation(float pointValue[25],float a, float b, int position)~~
	{
	~~float f12, f34;~~
	~~f12 = apointValue[position+1] + (1-a)pointValue[position];~~
	~~f34 = apointValue[position+6] + (1-a)pointValue[position+5];~~

	~~return bf34 + (1-b)f12;~~
	}
	~~-----~~
	~~[[최다인]]~~

imported>miura0806 at 14:02, 3 April 2014

2014-04-03T14:02:28Z

← Older revision		Revision as of 14:02, 3 April 2014
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	return bf34 + (1-b)f12;		return bf34 + (1-b)f12;
	}		}
			-----
			[[최다인]]

imported>miura0806 at 14:01, 3 April 2014

2014-04-03T14:01:54Z

New page

* 2014년 4월 3일 개발
* 문제 : http://cau.ac.kr/~bongbong/c12/ -> Homework #4 -> Prob2. [[Bilinear Interpolation]]
#include <stdio.h>
#include <stdlib.h>

#pragma warning(disable:4996)

int computePosition(float, float);
float bilinearInterpolation(float*, float, float, int);

int main()
{
float xValue, yValue, a, b;
float pointValue[25];
int i, position;

printf("two float values x and y (ex: 0.5 1.0) : ");
scanf("%f %f",&xValue,&yValue);
printf("25 float values for the values at 25 grid points (ex: 1.0 3.5 ...)\n: ");
for(i = 0; i < 25; i++)
scanf("%f",&pointValue[i]);

position = computePosition(xValue, yValue);
a = xValue - (int)xValue;
b = yValue - (int)yValue;

printf("The Value at the coordinate (x,y) is %.3f\n",bilinearInterpolation(pointValue, a, b, position));

system("pause");
return 0;
}

int computePosition(float xValue, float yValue)
{
int xposition = (int)xValue + 5*(int)yValue;
if(xposition%5 == 4)
xposition--;
if(xposition>=20)
xposition-=5;
return xposition;
}

float bilinearInterpolation(float pointValue[25],float a, float b, int position)
{
float f12, f34;
f12 = a*pointValue[position+1] + (1-a)*pointValue[position];
f34 = a*pointValue[position+6] + (1-a)*pointValue[position+5];

return b*f34 + (1-b)*f12;
}