Super Resolution implementation using multi-frame super resolution has been an expensive topic in the literature. Multiframe Super-Resolution is to generate the high-resolution image from multiple low-resolution images perspectives of a same scene. Most important part of multi-frame Superresolution is Image Registration; that estimates the translation, rotation and scaling parameters and also aligns images. In this paper, they propose a combination of Gaussian Pyramid Optical Flow (GPOF) Registration method and Gradient method for constructing Super Resolution image. In the proposed approach, they focus on the movement model of the image registration GPOF, which reach the sub-pixel and allows for the large pixel motions, while keeping the size of image neighborhood relatively small. And apply Gradient method, which can accurately perform precise registration with the amount of image movement is small between the two images; it can get the one reconstructed image. They get the better results compares with the others registration methods. And lastly, they apply Discrete Wavelet Transform (DWT) image interpolation algorithm; they can get the high resolution image. Experiment results show that the HR image by their proposed method have much higher quality than other methods.

Background: Axillary Brachial Plexus Block has gained popularity in forearm surgeries. Addition of adjuvants to local anaesthetics can prolong postoperative analgesia. But there are very few studies comparing Fentanyl and Dexmedetomidine as adjuvants to Bupivacaine in axillary block. Hence we carried out comparative evaluation of two drugs as adjuvants among patients undergoing forearm orthopaedic surgeries. This prospective Methods: randomized double blind study included eighty patients of either gender aged 18 to 60 years, ASA-I/II, scheduled for forearm surgeries divided into two groups of 40 patients each using opaque sealed enveloped technique . BF group: 24 ml volume of 0.25%Bupivacaine+ Fentanyl 1mcg/kg. BD group: 24 ml volume of 0.25%Bupivacaine+ Dexmedetomidine 1mcg/kg. Patients were observed for onset, peak effect, duration of post operative analgesia and perioperative complication, if any. Mean durat Results: ion of post operative analgesia was signicantly prolonged in BD group compared to BF group (1000.77±37.71 vs 795.62±45.69 minutes), (p<0.0001). While onset and effect of complete block was achieved earlier in BF group. Grade 1 post operative sedation score was seen in 10% cases of BD group. There was no signicant haemodynamic disturbances perioperatively. Conclusion: Dexmedetomidine as adjuvant to Bupivacaine in Axillary brachial plexus block for orthopaedic forearm surgeries produced prolonged duration of post-operative analgesia compared to Fentanyl adjuvant without signicant adverse effect.