How To 

How To Use Photoshop’s Adaptive Wide Angle Filter

Some images require a wide angle lens in order to include as much detail as possible within the field of view. The problem with this method is that these lenses often distort the photo, creating a “fisheye” effect that warps the image around the edges. To correct this, Photoshop offers a filter called “Adaptive Wide Angle” that provides a variety of tools designed to specifically correct this problem. Here’s how you use them.

1. Open the “Adaptive Wide Angle” Filter.
With the layer of the distorted image selected, hit “Filter > Adaptive Wide Angle…” from the menu bar to open the workspace.

2. Adjust the “Correction” parameters.
You have several options from the get-go in the dropdown menu - we’re going to go with “Fisheye” since the distortion in this image is obviously caused by an wide angle lens. You can also choose “Perspective” for distortions in camera angle, “Panoramo” for photomerge panoramas, “Full Spherical” for 360-degree panoramas and “Auto” to detect the appropriate image correction. Once the mode is selected, we’ll adjust the “Focal Length” to guess the type of lens used in order to straighten out the image at a base level.

3. Use the Constraint tool to correct the image’s vertical and horizontal lines.
After selecting the tool in the upper-right corner of the workspace, hold “shift” and drag the tool along the lines of the image that should appear completely horizontal or vertical. The line should follow the curvature of the lens.

4. Adjust the line and focal length accordingly.
After releasing, the image should warp the area around the constraint so that it appears vertical. This sometimes might not work exactly as you plan it, so to adjust the line, simply grab the control point in the center of the constraint line and drag it until it follows the curvature on the image. You can also re-adjust the focal length to make these lines more accurate. Apply constraints to as many straight horizontal or vertical lines as you can find in the image to begin straightening it out.

5. Apply the Constraint tool to angled lines.
Without holding shift, you can drag the constraint tool along lines that are directed against the grid of the image but are still distorted (like the lines on the the building that follow the perspective of the photo). Once released, you can adjust the angle of the line via the angle control point. With so many constraint lines dictating competing information in the photo, things might start to get a little messy - to readjust any constraint, simply right click on any line to apply changes.

6. Adjust the “Crop” and “Scale” parameters.
By now, the image should be so thoroughly altered that the edges of the frame are completely warped. To occlude this, you can adjust the “Scale” and “Crop Factor” parameters so that the edges are hidden behind the frame.