Parallax correction
When the camera it is not perpendicular to the object surface the camera will exhibit color
alignment artifacts. The parallax distortion increases when imaging at steep angles relative
to the cameras imaging plain. This is an optical effect caused by the line spacing of the
three individual colors. This spacing results in a different magnification for each line at high
angles. As shown in the figure below, there is color distortion at the extremes ends of the
image but at the center of the image the color distortion does not show up.
Figure 4: Image with Horizontal Color Alignment Issues
Using the camera’s Parallax Correction feature, the optical magnification for each line is
adjusted such that colors can be lined up at the extreme ends of the image without affecting
the center. Activate the feature Image Distortion Correction Mode
(
imageDistortionCorrectionMode
= Active). By tuning the feature Image Distortion
Correction Pixel Stretch (
imageDistortionParallaxCorrectionPixelStretch),
the user can adjust
the parallax correction of the image. The value entered here must be between -4 and 4
(pixels) by step of 0.1 (pixel).
Figure 5: CamExpert Parallax Correction Controls
Figure 6: Corrected Image
The figure above is the same image corrected using the parallax correction.
