tailieunhanh - Báo cáo hóa học: " Research Article Demosaicking Based on Optimization and Projection in Different Frequency Bands"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Demosaicking Based on Optimization and Projection in Different Frequency Bands | Hindawi Publishing Corporation EURASIP Journal on Image and Video Processing Volume 2008 Article ID 364142 14 pages doi 2008 364142 Research Article Demosaicking Based on Optimization and Projection in Different Frequency Bands Osama A. Omer and Toshihisa Tanaka Department of Electrical and Electronic Engineering Tokyo University of Agriculture and Technology Tokyo 184-8588 Japan Correspondence should be addressed to Osama A. Omer osama@ Received 30 July 2007 Revised 10 November 2007 Accepted 23 November 2007 Recommended by Alain Tremeau A fast and effective iterative demosaicking algorithm is described for reconstructing a full-color image from single-color filter array data. The missing color values are interpolated on the basis of optimization and projection in different frequency bands. A filter bank is used to decompose an initially interpolated image into low-frequency and high-frequency bands. In the low-frequency band a quadratic cost function is minimized in accordance with the observation that the low-frequency components of chrominance slowly vary within an object region. In the high-frequency bands the high-frequency components of the unknown values are projected onto the high-frequency components of the known values. Comparison of the proposed algorithm with seven state-of-the-art demosaicking algorithms showed that it outperforms all of them for 20 images on average in terms of objective quality and that it is competitive with them from the subjective quality and complexity points of view. Copyright 2008 O. A. Omer and T. Tanaka. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Usage of digital cameras is spreading rapidly as they are easy-to-use image input devices. The increasing popularity of digital cameras has provided motivation to improve all .

TÀI LIỆU LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.