The paper presents a new wearable Cognitive Aid System for Blind People (CASBIiP). The prototype device was developed as an obstacle detector, orientation and navigation Electronic Travel Aid (ETA) for blind people. The device provides a binaural acoustic image representation. The environmental information acquisition system is based on an array of lx64 CMOS Time-of-Flight sensors. Through stereoscopic (binaural) acoustic sounds the device relays the surrounding near and far environment. Experimental results demonstrate that blind users are able to detect obstacles and navigate through unknown and known environments safety and confidently. CASBIiP works accurately in range of 15m in distance and 64° in azimuth, providing significant advantages in comparison with currently existing ETA systems.
Obtaining the glottal space segmentation is essential to characterize morphological disorders of vocal folds. In this study, the tested images are been acquired by direct optical inspection of the glottis using an endoscope and most of them are very poor quality. The application of motion estimation is very useful to segment the vocal folds endoscopic videos without user interaction. This approach involves three process steps: 1) Wiener motion estimator--to shift the measurement the next frame regarding to the current frame, and look for similarities between them. The best matching will accurate a shift equal to the displacement vector of the object; 2) Segmentation using motion estimation results and applying Gabor filtering; 3) Experimental results to demonstrate that the proposed method is effective. Our proposal works correctly with 95% of database test videos and it shows a great advance in design, and in the nearby future, a complete method to diagnose vocal folds pathologies.
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