To the best of authors knowledge, no segmentation method has been published so far that successfully automatically segments the choroid from 1060 nm OCT without manual intervention.
The clustering approach is more generally applicable in comparison to those relying on application dependent knowledge for segmentation, like zero velocity points as used in [18], [19].
Our main contribution is coming up with a novel application strategy of a priori knowledge for segmentation and achieving better accuracy and time efficiency in object organ extraction.
A method called knowledge-guided segmentation further makes use of anatomic knowledge of the colon for efficient extraction of the colonic wall, including collapsed regions; as a result, approximately 98% of the entire colon can be extracted [ 18].
This spatiotemporal continuity can be used to transfer knowledge from segmentations in areas of the LV that are easy to segment, for guiding segmentation in more challenging areas, such as the basal and apical slices, where previous methods have not been reliable and manual tracing is necessary.
Without an additional source of knowledge, automatic image segmentation based on low level image features seemed unlikely to succeed in extracting semantic objects in generic images.
The final goal is to contribute to deepen the knowledge on market segmentation in order to define more people-oriented transport policies, focusing on a medium size Italian city, Alessandria.
Ten readers were radiologists with experience ranging from 1 to 25 years (group 1) and ten readers were scientists with basic knowledge on image segmentation (group 2).
However, the difficulty to handle transitions between more or less stable states exists independent from the selected features if we do not apply prior knowledge about the segmentation of the trajectory.
In the particular case presented in this work, this layer contains agents for normalization and segmentation, knowledge extraction, and clustering.
To the best of our knowledge, the only segmentation method readily available for doing this is the recently published HaarSeg method (Ben-Yaacov and Eldar, 2008).
