sobel_filter: Calculating sobel filters
In jspaezp/clasifierrr: Classifies images based on features

Description Usage Arguments Functions See Also Examples

The sobel filter is used to detect edges in the images

1
2
3

compile_sobel_filter(width, dim_img)

sobel_filter(img, width = 3, img_fft = fftwtools::fftw2d(img))

`width`	width of the filter to be applied
`dim_img`	the dimensions of the image to be used later during filtering, only needed if pre-compiling the filter.
`img`	Dimensions of the image
`img_fft`	optional argument to pass the pre-computed fourier tranform of the image from 'fftwtools::fftw2d(img)'.

compile_sobel_filter: pre-calculates parameters and returns a function

Other filters: circular_hough_transform(), compile_hough_circle_draw(), compile_variance_filter(), dog_filter()

test_image <- matrix(runif(81), 9)
sobel_filter(test_image, 3)

my_sobel_filter <- compile_sobel_filter(3, dim(test_image))
my_sobel_filter(test_image)