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Image processing algorithms are dominating contemporary digital systems due to their importance and adoption by a large number of application domains. Despite their significance, their computational requirements often limit their usage, especially in deeply embedded designs. Heterogeneous computing systems offer a promising solution for this performance gap, leading to their ever increasing utilization by designers. This work targets the acceleration of an image registration pipeline on a System-on-Chip (SoC) including both general purpose and re-configurable computing elements. The evaluation of our proposed HW/SW co-designed image registration application on a state-of-the-art FPGA based SoC showcases its ability to outperform software designs leading to orders of performance speedup (up to 67x) against embedded CPUs. CCS CONCEPTS• Computing methodologies → Image processing; • Hardware → Hardware accelerators; Hardware-software codesign.

Objectives: Panoramic images of the jaws are extensively used for dental examinations and/ or surgical planning because they provide a general overview of the patient's maxillary and mandibular regions. Panoramic images are two-dimensional projections of three-dimensional (3D) objects. Therefore, it should be possible to reconstruct them from 3D radiographic representations of the jaws, produced by CBCT scanning, obviating the need for additional exposure to X-rays, should there be a need of panoramic views. The aim of this article is to present an automated method for reconstructing panoramic dental images from CBCT data. Methods: The proposed methodology consists of a series of sequential processing stages for detecting a fitting dental arch which is used for projecting the 3D information of the CBCT data to the two-dimensional plane of the panoramic image. The detection is based on a template polynomial which is constructed from a training data set. Results: A total of 42 CBCT data sets of real clinical pre-operative and post-operative representations from 21 patients were used. Eight data sets were used for training the system and the rest for testing. Conclusions: The proposed methodology was successfully applied to CBCT data sets, producing corresponding panoramic images, suitable for examining pre-operatively and postoperatively the patients' maxillary and mandibular regions.