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/********************************************************
Author: Diwakar Bhardwaj
*********************************************************
Usage :return_image=GeometricShearer(input_image,'direction',value)
value is the amount want to shear the image in given direction
********************************************************/
#include <numeric>
#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/opencv.hpp"
#include <iostream>
using namespace cv;
using namespace std;
extern "C"
{
#include "api_scilab.h"
#include "Scierror.h"
#include "BOOL.h"
#include <localization.h>
#include "sciprint.h"
#include "../common.h"
int opencv_GeometricShearer(char *fname, unsigned long fname_len)
{
SciErr sciErr;
int intErr = 0;
int iRows=0,iCols=0;
int *piAddr = NULL;
int *piAddrNew = NULL;
int *piAddr2 = NULL;
int *piAddr3 = NULL;
int *piAddr4 = NULL;
int *piLen = NULL;
char **direction = NULL;
int i,j,k;
double alpha, beta,x,n,value;
//checking input argument
CheckInputArgument(pvApiCtx,3,3);
CheckOutputArgument(pvApiCtx, 1, 1) ;
Mat image,new_image;
retrieveImage(image, 1);
sciErr = getVarAddressFromPosition(pvApiCtx,2, &piAddr2);
if (sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
sciErr = getMatrixOfString(pvApiCtx, piAddr2, &iRows, &iCols, NULL, NULL);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
piLen = (int*)malloc(sizeof(int) * iRows * iCols);
//second call to retrieve length of each string
sciErr = getMatrixOfString(pvApiCtx, piAddr2, &iRows, &iCols, piLen, NULL);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
direction = (char**)malloc(sizeof(char*) * iRows * iCols);
for(i = 0 ; i < iRows * iCols ; i++)
{
direction[i] = (char*)malloc(sizeof(char) * (piLen[i] + 1));//+ 1 for null termination
}
//third call to retrieve data
sciErr = getMatrixOfString(pvApiCtx, piAddr2, &iRows, &iCols, piLen, direction);
if(sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
sciErr = getVarAddressFromPosition(pvApiCtx,3,&piAddr3);
if (sciErr.iErr)
{
printError(&sciErr, 0);
return 0;
}
intErr = getScalarDouble(pvApiCtx, piAddr3 ,&value);
if(intErr)
return intErr;
int r1, c1; // tranformed point
int rows, cols; // original image rows and columns
rows = image.rows;
cols = image.cols;
if(strcmp(direction[0], "Horizontal") == 0)
{
double Bx = value;
double By = 0;
int maxXOffset = abs(cols * Bx);
int maxYOffset = abs(rows * By);
Mat out = Mat::ones(image.rows+maxYOffset, image.cols+maxXOffset, image.type());
for(int r = 0; r < out.rows; r++)
{
for(int c = 0; c < out.cols; c++)
{
r1 = r + c * By - maxYOffset;
c1 = r * Bx + c - maxXOffset;
if(r1 >= 0 && r1 <= rows && c1 >= 0 && c1 <= cols)
{
out.at<uchar>(r, c) = image.at<uchar>(r1, c1);
}
}
}
int temp = nbInputArgument(pvApiCtx) + 1;
string tempstring = type2str(out.type());
char *checker;
checker = (char *)malloc(tempstring.size() + 1);
memcpy(checker, tempstring.c_str(), tempstring.size() + 1);
returnImage(checker,out,1);
free(checker);
}
else if(strcmp(direction[0], "Vertical") == 0)
{
double Bx = 0;
double By = value;
int maxXOffset = abs(cols * Bx);
int maxYOffset = abs(rows * By);
Mat out = Mat::ones(image.rows+maxYOffset, image.cols+maxXOffset, image.type());
for(int r = 0; r < out.rows; r++)
{
for(int c = 0; c < out.cols; c++)
{
r1 = r + c * By - maxYOffset;
c1 = r * Bx + c - maxXOffset;
if(r1 >= 0 && r1 <= rows && c1 >= 0 && c1 <= cols)
{
out.at<uchar>(r, c) = image.at<uchar>(r1, c1);
}
}
}
int temp = nbInputArgument(pvApiCtx) + 1;
string tempstring = type2str(out.type());
char *checker;
checker = (char *)malloc(tempstring.size() + 1);
memcpy(checker, tempstring.c_str(), tempstring.size() + 1);
returnImage(checker,out,1);
free(checker);
}
else
{
sciprint("Not valid 2nd argument");
}
//Assigning the list as the Output Variable
AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
//Returning the Output Variables as arguments to the Scilab environment
ReturnArguments(pvApiCtx);
return 0;
}
/* ==================================================================== */
}
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