The `image` Module¶

`fft_image`	Perform an FFT on the supplied image array.
`lowpass_filter_image`	Load an image from a file, and low-pass filter via a Gaussian kernel.

Some basic image processing routines.

pphelper.image.fft_image(image)¶

Perform an FFT on the supplied image array.

Parameters:	image (ndarray) – An array of the image
Returns:	A namedtuple containing the the fast-fourier transform, the amplitude and phase.
Return type:	namedtuple

pphelper.image.lowpass_filter_image(image=None, filename=None, flatten=False, sigma=3)¶

Load an image from a file, and low-pass filter via a Gaussian kernel.

Parameters:	image (ndarray, optional) – The image to be processed. This will usually have been created using scipy.misc.imread or a similar function. If this argument is present, filename will be ignored. filename (string, optional) – The name of the image file to load and process. Will be ignored is image_array is not None. flatten (bool, optional) – Whether to “flatten” the image before filtering, i.e. convert it to grayscale. sigma (scalar, optional) – The standard deviation for Gaussian kernel. See scipy.ndimage.filters.gaussian_filter.
Returns:	The lowpass-filtered image.
Return type:	ndarray

The image Module¶