Image Sharpening

Building the Cantata Workspace

1. Get image $DIP/data/retina.viff, convert its data type to "float" and display it using operators User defined Convert Type and Display Image .
2. Perform the convolution of the image and kernel and display the result. Use operator Linear Operator The laplacian mask is in $DIP/data/laplacian.ascii.
3. Pad the kernel and take its Fourier transform to visualize its response in the frequency domain. The operators are Pad and FFT .
4. Add the original image with its filtered version and display result.

Exercises

• Design a combined kernel which performs the laplacian and the addition simultaneously.
• Perform the same experiment but modifying high-pass kernels.
• User pseudocolor to visualize the frequency response of the Laplacian operator, with the Autocolor operator.