![Before-and-after](https://www.astronomy.com/wp-content/uploads/sites/2/2023/02/Before-and-after.jpg)
These before and after images show the results of using the author’s technique of masked High Pass filtering on astroimages. Tony Hallas
Some years ago, imagers discovered a new way to enhance the detail in an astrophoto that proved superior to the unsharp mask in Photoshop. Follow me through these steps to uncover the power of what I call masked high-pass filtering.