中国农业科学 ›› 2006, Vol. 39 ›› Issue (12): 2615-2610 .

• 研究简报 • 上一篇    下一篇

成像环境因素对烟叶图像采集结果的影响及校正研究

马文杰,贺立源,刘华波,李翠英   

  1. 华中农业大学资源与环境学院
  • 收稿日期:2006-01-25 修回日期:2006-04-05 出版日期:2006-12-10 发布日期:2006-12-10
  • 通讯作者: 贺立源

The effects of environmental conditions on the acquisition of flue-cured tobacco images and correction

  1. 华中农业大学资源与环境学院
  • Received:2006-01-25 Revised:2006-04-05 Online:2006-12-10 Published:2006-12-10

摘要: 【目的】研究灯箱中采集烟叶图像时照明电压、不同品牌数码相机、聚焦距离及相机分辨率等成像环境因素对图像识别结果的影响,用相对颜色法对因成像环境因素影响而引起的烟叶图像颜色变异进行实时校正。【方法】通过试验筛选出颜色表现稳定的聚四氟乙烯材料作为颜色参照白板,在灯箱环境中,设置不同的因素处理,用数码相机同期采集烟叶与颜色参照白板图像,通过分析烟叶图像R、G、B颜色特征变化来确定成像环境因素构成的影响。提取烟叶图像三颜色分量与颜色参照白板对应颜色分量的比率,即相对颜色分量作为校正烟叶图像识别误差的特征参量。【结果】照明电压、不同品牌数码相机、相机分辨率相同而聚焦距离不同均使烟叶图像颜色产生变异,从而出现识别误差。【结论】相对颜色法能够实时校正识别误差,降低因成像环境因素影响而产生的颜色变异,为规范烟叶图像的数字采集环境奠定了基础。

关键词: 烟叶图像, 成像环境因素, 图像采集, 颜色参照白板

Abstract: Studies were made to address if the environmental conditions such as lamp voltage, camera brand, focus and image resolution have some effects on the recognition of tobacco images. The relative color was used to fast and timely correct the errors in tobacco image recognition. The reference plane was made of the material with constant color. The tobacco picture was taken by digital camera under various treatments in the lamp box. The effects of environmental factors were identified through the analysis of characteristics of image color and changing style. The color difference between the tobacco color and reference plane was used to correct the errors. The results showed that lamp voltage, camera brand, focus and image resolution do influence the recognition results. The correction by using relative color yields satisfactory results for it decreases the effects of environment. This study laid foundations for the standardization of digital tobacco collection framework.

Key words: digital image, flue-cured tobacco leaf, image acquisition, influence, correction