Implements the discrete Fourier transform (DFT)

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- Implements the discrete Fourier transform (DFT)

# Imagick::forwardFourierTransformImage

(PECL imagick 3 >= 3.3.0)

Imagick::forwardFourierTransformImage — Implements the discrete Fourier transform (DFT)

### Description

public Imagick::forwardFourierTransformimage(bool `$magnitude`): bool

Implements the discrete Fourier transform (DFT) of the image either as a magnitude / phase or real / imaginary image pair.

### Parameters

`magnitude`

  If true, return as magnitude / phase pair otherwise a real / imaginary image pair.

### Return Values

Returns `true` on success.

### Examples

Example #1 Imagick::forwardFourierTransformImage()

    <?php//Utility function for forwardTransformImagefunction createMask() {    $draw = new \ImagickDraw();    $draw->setStrokeOpacity(0);    $draw->setStrokeColor('rgb(255, 255, 255)');    $draw->setFillColor('rgb(255, 255, 255)');    //Draw a circle on the y-axis, with it's centre    //at x, y that touches the origin    $draw->circle(250, 250, 220, 250);    $imagick = new \Imagick();    $imagick->newImage(512, 512, "black");    $imagick->drawImage($draw);    $imagick->gaussianBlurImage(20, 20);    $imagick->autoLevelImage();    return $imagick;}function forwardFourierTransformImage($imagePath) {    $imagick = new \Imagick(realpath($imagePath));    $imagick->resizeimage(512, 512, \Imagick::FILTER_LANCZOS, 1);    $mask = createMask();    $imagick->forwardFourierTransformImage(true);    @$imagick->setimageindex(0);    $magnitude = $imagick->getimage();    @$imagick->setimageindex(1);    $imagickPhase = $imagick->getimage();    if (true) {        $imagickPhase->compositeImage($mask, \Imagick::COMPOSITE_MULTIPLY, 0, 0);    }    if (false) {        $output = clone $imagickPhase;        $output->setimageformat('png');        header("Content-Type: image/png");        echo $output->getImageBlob();    }    $magnitude->inverseFourierTransformImage($imagickPhase, true);    $magnitude->setimageformat('png');    header("Content-Type: image/png");    echo $magnitude->getImageBlob();}?>