Sharpening Images

Sharpening is used to enhance the fine details of images that have been smoothed or blurred. This Demonstration shows how to sharpen images in the spatial domain by using two common methods: the Laplacian operator and unsharp masking.
The Laplacian operator obtains intensity transitions in the image and adds this filtered image to the original to enhance the smoothed details.
Unsharp masking first generates an image (mask) having only the fine details. This is created by subtracting from the original image a smoothed version of it. Then this mask is added to the original image to obtain an enhanced version with more visible fine details. Incidentally, we can boost the effect of the mask added to the image by increasing the weight of the mask in the addition operation.



  • [Snapshot]
  • [Snapshot]
  • [Snapshot]


[1] R. C. Gonzales and R. E. Woods, Digital Image Processing, 3rd ed., Upper Saddle River, NJ: Prentice Hall, 2008.
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.

Mathematica »
The #1 tool for creating Demonstrations
and anything technical.
Wolfram|Alpha »
Explore anything with the first
computational knowledge engine.
MathWorld »
The web's most extensive
mathematics resource.
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
interact with.
STEM Initiative »
Programs & resources for
educators, schools & students.
Computerbasedmath.org »
Join the initiative for modernizing
math education.
Step-by-Step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Powered by Wolfram Mathematica © 2018 Wolfram Demonstrations Project & Contributors  |  Terms of Use  |  Privacy Policy  |  RSS Give us your feedback
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to Mathematica Player 7EX
I already have Mathematica Player or Mathematica 7+