| Autor: |
Bergen, Tobias, Wittenberg, Thomas, Münzenmayer, Christian |
| Zdroj: |
International Journal of Computer Assisted Radiology and Surgery; 20240101, Issue: Preprints p1-9, 9p |
| Abstrakt: |
Inhomogeneous illumination often causes significant shading and vignetting effects in images captured by an endoscope. Most of the established shading correction methods are designed for gray-level images. Only few papers have been published about how to compensate for shading in color images. For endoscopic images with a distinct red coloring, these methods tend to produce color artifacts. A color shading correction algorithm for endoscopic images is proposed. Principal component analysis is used to calculate an appropriate estimate of the shading effect so that a one-channel shading correction can be applied without producing undesired artifacts. The proposed method is compared to established YUV and HSV color-conversion-based approaches. It produces superior results both on simulated and on real endoscopic images. Example images of using the proposed shading correction for endoscopic image mosaicking are presented. A new method for shading correction is presented which is tailored to images with distinct coloring. It is beneficial for the visual impression and further image analysis tasks. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Full text from SpringerLink