CAJ | 학술논문

本文提出一种面向低成本嵌入式应用的快速图像在线放大算法.通过将原始图像划分为区域子图,利用查表映射法将其逐一放大形成新区域子图,进而合成放大后的目标图像.本文以双立方插值为基准动态构建放大表,进一步提出了一种根据领域扩展信息计算可变像素放大表的改进映射方法,有效解决了区域间连接不连续、平滑度低缺陷.实验结果显示,本算法与双立方插值法效果相当,但时间损耗仅为其23%,且对图像实时放大无视觉时滞,具有良好的实际应用价值.
본문제출일충면향저성본감입식응용적쾌속도상재선방대산법.통과장원시도상화분위구역자도,이용사표영사법장기축일방대형성신구역자도,진이합성방대후적목표도상.본문이쌍립방삽치위기준동태구건방대표,진일보제출료일충근거영역확전신식계산가변상소방대표적개진영사방법,유효해결료구역간련접불련속、평활도저결함.실험결과현시,본산법여쌍립방삽치법효과상당,단시간손모부위기23%,차대도상실시방대무시각시체,구유량호적실제응용개치.
This paper presents a real time image zoom algorithm based on low-cost embedded platforms, which divides the original image into sub-regions, then lookups using table mapping method to enlarge each sub-regions, to restore the full image. After building the mapping table data based on bi-cubic interpolation, an improved algorithm is proposed to solve the aliasing problem of connecting parts, by using alterable data in the mapping table. The experimental results show that the algorithm provides similar image quality compared with bi-cubic interpolation algorithm, with only 23% time consumption. The algorithm can be used in real time environment without noticeable delay;the practical value is very high.