摘要
为获得高质量的水稻叶部病害图像,在自行设计的灯箱中充分考虑了物距、灯管数目、灯管高度、灯管侧距等成像环境因素对图像质量的影响,通过主客观评价方法对不同成像环境因素水平下拍摄的照片进行质量评价,最终得出最佳成像环境因素取值水平。该过程分为三步:首先采用正交试验法设计各环境因素取值水平并拍摄照片,然后采用客观评价方法进行图像质量评价,最后通过与主观评价方法对比确定成像环境因素最佳取值水平。经过大量实验分析得出:在不同成像环境因素取值水平下,所拍摄照片的质量是有差别的。因此,基于质量评价的方法来确定最佳成像环境因素取值是可行的,为规范水稻叶部病害图像采集环境提供了新思路。
In order to obtain high-quality rice leaf diseases images, proposed a image-gathering system based on lamp-box. The best value of environmental factors could be acquired by image quality evaluation using subjective and objective methods. Selected shoot distance, lamp number, lamp height, lamp side distance as impact factors. During the orthogonal test and image quality evaluation, seperated the process：①taking photo under the level of environmental factors which were designed by orthogonal test. ②using objective method to evaluate image quality. ③the best environment factors level was determined by the comparison of subjective and objective methods. Through a large number of experimental analysis, the result can be drawn： there are some differences between image quality when taking photos under different level of environmental factors. So, the method which based on quality evaluation to determine the best value of environmental imaging factors is feasible and provides a new way for standard image gathering environment of rice leaf diseases.
出处
《计算机应用研究》
CSCD
北大核心
2009年第12期4836-4838,共3页
Application Research of Computers
基金
国家"863"计划资助项目(2007AA10Z237)
国家科技支撑计划项目(2007BAD33B05)
关键词
水稻叶部病害
图像采集
正交试验
图像质量评价
rice leaf disease
image acquisition
orthogonal test
image quality evaluation
