Abstract: The present technology provides a nanoparticulate in-situ gelling vitreous substitute, which is a liquid at room temperature to aid easy administration, such as e.g. through a small needle incision, and forms a gel within the eye, which is hydrophilic in nature, similar to the natural vitreous. The vitreous substitute formulation may include a water-soluble natural or synthetic polymer and a gelling-agent which are blended together in the presence of a cross linker, to form a gel having the properties of the vitreous humor. The process of cross linking and gelation may occur in-situ. This can be achieved by dispensing to the eye, different components of the vitreous substitute in liquid state, along with the cross linking agent.

Abstract: A method is provided that creates a lecture video capsule containing highlights of an original instructional video based on visual quality and content. The method includes segmenting and recognizing activities in the instructional video using a hidden Markov model (HMM). The activities are classified into three categories: talking head, writing hand and slideshow. The talking head frames are classified as non-content frames, while the writing hand and slideshows are classified as content frames. A non-reference based objective quality assessment of the non-content frames may be performed to detect high quality frames. Statistical parameters of an intensity histogram and a horizontal projection profile (HPP) of the content frames may be used to derive an objective quality measure of the content frames that is used to extract high quality content frames. The selected high quality non-content and content frames form a video clip or capsule, which is a temporally compressed representation of the video.