Binary line drawing of house

(hse1)

The original image

(hse1rob1)

Result of applying the Roberts Cross edge detector to hse1.

(hse1fou1)

Fourier Transform of hse1. Displayed after histogram equalization.

(hse1msk3)

Lowpass frequency filtering kernel.

(hse1fou2)

Result of multipling the Fourier Transform of hse1 with hse1msk3.

(hse1fil1)

Inverse Fourier Transform of hse1fou2.

(hse1msk1)

Vertical stripe smoothing frequency mask for hse1.

(hse1fil2)

Result of multiplying the frequency domain representation of hse1 and hse1msk1, and then inverse Fourier Transforming (and normalizing) the product.

(hse1msk2)

Vertical stripe preserving frequency mask for hse1.

(hse1fil3)

Result of multiplying the frequency domain representation of hse1 and hse1msk2, and then inverse Fourier Transforming (and normalizing) the product.

(hse1fil4)

Result of thresholding hse1fil3.

©2003 R. Fisher, S. Perkins, A. Walker and E. Wolfart.