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HxAtan

Synopsis

HxImageRep HxAtan (HxImageRep img)

Input

HxImageRep img

The image you want to take the arctangent of.

Return value

HxImageRep

The pixelwise arctangent of the input image.

Description

This function takes the arctangent of every pixel value of the input image. For vector images, the arctangent of every element of the vector is taken.

Remarks

No possible errors

This function can not result in any errors.

Examples

Taking the arctangent of an image.

#include "HxImageRepGlobalFuncs.h"
#include "HxImageRep.h"

HxImageRep HxAtanExample1(HxImageRep img) {
   img = HxImageAsDouble(img);
   img = HxContrastStretch(img, 10.0);
   img = HxAddVal(img, -5.0);
   img = HxAtan(img);
   img = HxContrastStretch(img, 255.0);
   img = HxImageAsByte(img);
   return img;
}

int main(int argc, char* argv[])
{
    HxImageRep im1 = HxMakeFromFile(argv[1]);
    im1 = HxAtanExample1(im1);
    HxWriteFile(im1, argv[2]);

    return 0;
}

Input image for the HxAtan example.

Output image for the HxAtan example.

This example illustrates the result of taking the arctangent of an image.

See also

HxTan, HxAsin, HxTanh,

Keywords

Unary, Trigonometric,

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