摘要
针对在不同水体光谱采集方式下导出的色调并非绝对稳定及其合理性得不到验证的问题,提出利用同时获取太湖水体的数码照片提取色调信息来检验光谱导出色调的方法.为了保证数码相机大视场与光谱仪小视场的一致性,截取照片中尽可能包含蓝藻的256×256像素区域,再分割出蓝、绿通道差值较大的部分像素点提取色调.结果显示:如果是同一相机摄取的照片,其色调与光谱导出的色调具有高相关性;说明利用照片提取色调可以验证光谱导出色调的合理性,其可靠性也可由目测照片直接验证.
Because the derived hue by different water spectral collection methods is not absolutely stable and its rationality is difficult to be verified, a way of testing hue derived from spectrum through extracting hue information from digital photos of water in TaihuLake is proposed. To ensure the consistency of digital camera large field and spectrometer small field, the 256×256 pixel regions of photos are cut out including cyanobacteria as much blue and green channel. Th as possible. Hue is extracted from the pixels with larger difference between e result shows that hue from digital photo and that from spectrum have high relevance when using the same camera. The rationality of hue derived from spectrum can be verified by extracting hue from digital photos, and the reliability can also be proved by photos directly.
出处
《上海海事大学学报》
北大核心
2011年第2期77-82,共6页
Journal of Shanghai Maritime University
基金
上海市教育委员会科研创新项目(09YZ247)
上海海事大学校基金(20110028)
关键词
蓝藻
光谱
数码照片
色调
太湖
eyanobaeteria
spectrum
digital photo
hue
Taihu Lake
