Setting Lens Correction Options | Top Previous Next Learn more at BibbleLabs.com

The Lens Correction tool provides controls to correct for several types of optical distortion inherent in most lenses. For more information about lens correction effects, see the Understanding Advanced Image Editing Tools topic.

To set the lens correction options:

1. | From the Tools menu, click Advanced.

2. | In the drop-down menu, click Lens Correction.

There are three types of corrections that are available; each can be used alone, or with the other Lens Correction tools:

• | Distortion Correction: This corrects for barrel and pin-cushion distortion. The settings for this type of correction are read from a database of lenses, and are specific for each camera, lens, and focal length. These settings cannot be set directly in Bibble.

1. | To turn on the distortion correction tool, click the Enable Distortion Correction check box.

2. | Bibble will attempt to select the correct camera, lens, and focal length and will display these in the drop-downs. You may need to manually select the correct lens or camera if Bibble is unable to detect the correct ones.

3. | To have automatically crop the image to the best fit after correction, select Resize image to fit.

• | Chromatic Aberration Correction: This corrects for chromatic aberration distortion, typically seen as color fringing at the perimeters of images. The settings for this correction are applied manually within Bibble.

1. | To turn on the chromatic aberration correction tool, click the Enable CA Correction check box.

2. | Adjust the R / C slider to adjust Red / Cyan color shifting, and B / Y to adjust Blue / Yellow color shifting.

Note: Chromatic Aberration is most noticeable in high-contrast areas towards the corners of an image. Position Zoom Window on a corner of your image while adjusting the R / C and B / Y sliders to fine-tune the CA correction.

• | Vignette Correction: This corrects for or adds vignette - the darkening of the corners of an image. The settings for this correction are applied manually within Bibble.

1. | Adjust the Strength slider to control how dark or light the correction is: negative (left) adds vignetting (darkens corners), while positive (right) removes vignetting (lightens corners)

2. | Adjust the Radius slider to control how far from the perimeter the vignette correction will be applied: 0 is the smallest change, while 100 will extend far into the center of the image.

3. | If you are adding vignette to a cropped image, select Vignette Cropped Area to add the vignetting to the to cropped portion and not to the whole image.

About the Lens Database

Up through Bibble 4.7, lens distortion correction in Bibble - provided in the BPTLens plug-in - was compatible with Tom Neimans' PTLens text database. Tom has recently changed to using a private binary format for his database and changed his licensing terms and thus our database is currently not compatible with his latest database.

Beginning with Bibble 4.8, lens distortion correction has been reworked and moved inside the main Bibble application. Besides providing a more integrated solution, we've also added additional controls to correct Chromatic Aberration and light falloff due to lens vignetting. All of the lens profiles available with the last (4.7) version of the BPTLens plugin are also included and supported in Bibble 4.8. Bibble Labs will provide our own new calibrations as lenses and cameras are introduced. If you have a lens or camera that isn't currently supported and would like to ask us to include it, please visit our Lens Calibration page for information on how to send us the necessary test shots. In addition to the new controls you will also find that the lens corrections are applied faster and don't require as much memory as before.

Related Topics

Understanding Basic Image Editing Tools

Understanding Advanced Image Editing Tools