-<p>This option is new as of ImageMagick 6.5.4-3 (and now working for Windows users in ImageMagick 6.6.0-9). It transforms an image from the normal (spatial) domain to the frequency domain. In the frequency domain, an image is represented as a superposition of complex sinusoidal waves of varying amplitudes. The image x and y coordinates are the possible frequencies along the x and y directions, respectively, and the pixel intensity values are complex numbers that correspond to the sinusoidal wave amplitudes. See for example, <a href="http://en.wikipedia.org/wiki/Fourier_transform">Fourier Transform</a>, <a href="http://en.wikipedia.org/wiki/DFT">Discrete Fourier Transform</a> and <a href="http://en.wikipedia.org/wiki/FFT">Fast Fourier Transform</a>.</p>
-
-<p>A single image name is provided as output for this option. However, the output result will have two components. It is either a two-frame image or two separate images, depending upon whether the image format specified supports multi-frame images. The reason that we get a dual output result is because the frequency domain represents an image using complex numbers, which cannot be visualized directly. Therefore, the complex values are automagically separated into a two-component image representation. The first component is the magnitude of the complex number and the second is the phase of the complex number. See for example, <a href="http://en.wikipedia.org/wiki/Complex_numbers">Complex Numbers</a>.</p>
-
-<p>The magnitude and phase component images must be specified using image formats that do not limit the color or compress the image. Thus, MIFF, TIF, PFM, EXR and PNG are the recommended image formats to use. All of these formats, except PNG support multi-frame images. So for example,</p>
-
-<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert image.png -fft fft_image.miff</span></p>
-<p>generates a magnitude image as <kbd>fft_image.miff[0]</kbd> and a phase image as <kbd>fft_image.miff[1]</kbd>. Similarly,</p>
-
-<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert image.png -fft fft_image.png</span></p>
-<p>generates a magnitude image as <kbd>fft_image-0.png</kbd> and a phase image as <kbd>fft_image-1.png</kbd>. If you prefer this representation, then you can force any of the other formats to produce two output images by including <a href="#adjoin">+adjoin</a> following -fft in the command line.</p>
-
-<p>The input image can be any size, but if not square and even-dimensioned, it is padded automagically to the larger of the width or height of the input image and to an even number of pixels. The padding will occur at the bottom and/or right sides of the input image. The resulting output magnitude and phase images is square at this size. The kind of padding relies on the <a href="#virtual-pixel">-virtual-pixel</a> setting.</p>
-
-<p>Both output components will have dynamic ranges that fit within [0, <em class="QR">QuantumRange</em>], so that HDRI need not be enabled. Phase values nominally range from 0 to 2*π, but for non-HDRI compilations of ImageMagick, the phase image is scaled to span the full dynamic range. The magnitude image is not scaled and thus generally will contain very small values. As such, the image normally will appear totally black. In order to view any detail, the magnitude image typically is enhanced with a log function into what is usually called the spectrum. A log function is used to enhance the darker values more in comparison to the lighter values. This can be done, for example, as follows:</p>
-
-<p class='crt'><span class="crtprompt"> $magick> </span><span class='crtin'>convert fft_image.miff[0] -contrast-stretch 0 \ <br />
+<p>This option is new as of ImageMagick 6.5.4-3 (and now working for Windows
+users in ImageMagick 6.6.0-9). It transforms an image from the normal
+(spatial) domain to the frequency domain. In the frequency domain, an image is
+represented as a superposition of complex sinusoidal waves of varying
+amplitudes. The image x and y coordinates are the possible frequencies along
+the x and y directions, respectively, and the pixel intensity values are
+complex numbers that correspond to the sinusoidal wave amplitudes. See for
+example, <a href="http://en.wikipedia.org/wiki/Fourier_transform">Fourier
+Transform</a>, <a href="http://en.wikipedia.org/wiki/DFT">Discrete Fourier
+Transform</a> and <a href="http://en.wikipedia.org/wiki/FFT">Fast Fourier
+Transform</a>.</p>
+
+<p>A single image name is provided as output for this option. However, the
+output result will have two components. It is either a two-frame image or two
+separate images, depending upon whether the image format specified supports
+multi-frame images. The reason that we get a dual output result is because the
+frequency domain represents an image using complex numbers, which cannot be
+visualized directly. Therefore, the complex values are automagically separated
+into a two-component image representation. The first component is the
+magnitude of the complex number and the second is the phase of the complex
+number. See for example, <a
+href="http://en.wikipedia.org/wiki/Complex_numbers">Complex Numbers</a>.</p>
+
+<p>The magnitude and phase component images must be specified using image
+formats that do not limit the color or compress the image. Thus, MIFF, TIF,
+PFM, EXR and PNG are the recommended image formats to use. All of these
+formats, except PNG support multi-frame images. So for example,</p>
+
+<p class='crt'><span class="crtprompt"> $ </span><span class='crtin'>convert image.png -fft fft_image.miff</span></p>
+<p>generates a magnitude image as <kbd>fft_image.miff[0]</kbd> and a phase
+image as <kbd>fft_image.miff[1]</kbd>. Similarly,</p>
+
+<p class='crt'><span class="crtprompt"> $ </span><span class='crtin'>convert image.png -fft fft_image.png</span></p>
+<p>generates a magnitude image as <kbd>fft_image-0.png</kbd> and a phase image
+as <kbd>fft_image-1.png</kbd>. If you prefer this representation, then you can
+force any of the other formats to produce two output images by including <a
+href="command-line-options.html#adjoin">+adjoin</a> following -fft in the command line.</p>
+
+<p>The input image can be any size, but if not square and even-dimensioned, it
+is padded automagically to the larger of the width or height of the input
+image and to an even number of pixels. The padding will occur at the bottom
+and/or right sides of the input image. The resulting output magnitude and
+phase images is square at this size. The kind of padding relies on the <a
+href="command-line-options.html#virtual-pixel">-virtual-pixel</a> setting.</p>
+
+<p>Both output components will have dynamic ranges that fit within
+[0, <em class="QR">QuantumRange</em>], so that HDRI need not be enabled.
+Phase values nominally range from 0 to 2*π, but is scaled to span the full
+dynamic range. (The first few releases had non-HDRI scaled but HDRI not
+scaled). The magnitude image is not scaled and thus generally will contain
+very small values. As such, the image normally will appear totally black. In
+order to view any detail, the magnitude image typically is enhanced with a log
+function into what is usually called the spectrum. A log function is used to
+enhance the darker values more in comparison to the lighter values. This can
+be done, for example, as follows:</p>
+
+<p class='crt'><span class="crtprompt"> $ </span><span class='crtin'>convert fft_image.miff[0] -contrast-stretch 0 \ <br />