基于互信息和混合优化算法的多模医学图像配准

针对互信息函数的多极值问题,提出了一种基于混合优化算法的多模医学图像配准方法.对于多模医学图像,以互信息作为相似性测度,使用混合优化算法搜索出最佳配准变换参数,将待配准图像进行变换,从而达到配准的目的.实验表明,该算法能避免陷入局部最优值,配准结果精度达到亚像素级.     

林权改革中遥感影像真彩色融合技术探讨

以云南宜良县、昆明市五华区的林权改革项目为依托,针对林改的对象,林改的特殊性、广泛性等特点,对林改项目中的遥感影像融合技术进行研究,针对快乌卫星影像蓝光波段缺失的特点,探讨如何对蓝光波段进行模拟,使得研究区域的遥感影像真彩色融合的效果更为理想。     

新疆棉花遥感识别模型研究

依据新疆主要农作物的农时历及作物的地面光谱数据,论证了在TM遥感影像中识别棉花的最佳波段为第4波段,最佳识别月份为9月,最后通过TM遥感影像上对应的波段数据进行了验证,确定了棉花的识别模式。     

数字农业农田信息系统的建立

在遥感(RS)、地理信息系统(GIS)、全球定位系统(GPS)技术综合应用的基础上,通过对区域农田环境、作物等状况的数据采集和处理,完成3S技术功能的自适应融合和多源异构、空间与非空间数据以及基础空间数据与专题数据的融合,建立起一个以农田信息为主的资源与环境信息服务体系,用于专家进行数据查询、分析和决策.     

Analysis of Two-Dimensional Gel Electrophoresis Images of Protein from Posterior Silk Gland of Silkworm （Bombyx mort） on Day 1 and Day 4 in the 5th Instar Stage

The posterior silk gland （PSG） of silkworm is an important organ where fibroin is synthesized and secreted exclusively. Because fibroin constitutes 75-80% of the silk filament, the mechanism governing fibroin secretion, quality and yield of cocoon can be elucidated by the study on the PSG. Using two-dimensional gel electrophoresis （2-DE） and image analysis system, the changes in the protein composition in the PSG cell were investigated on the day 1 （D1） and day 4 （D4） in the 5th instar stage from five different strains of silkworm （Bombyx mori）. While differences at protein level between days and strains were far less than those observed at the gene level using EST analysis. The change trends in protein composition from D1 to D4 were diverse among the different strains. The results suggest that the secretion of fibroin is regulated by multiple proteins. The site of regulation and the proteins responsible for the regulation vary with the strain, which leads to differences between strains in the capacity of fibroin secretion in the PSG cell.     

基于岩心图像压缩的编辑器设计

岩心图像数据量很大,不便存储和传输,需要进行压缩。岩心图像编辑器采用标准的JPEG压缩方法,需要对编辑器进行设计。编辑器结构分为编码过程和解码过程,其功能包括FDCT(正向离散余弦变换)和IDCT(DCT逆变换)、量化和反量化、DC编解码和AC系数排序、熵编码和熵解码。可实现岩心图像的无损压缩。     

Analysis on the Variation Expression of Difficult-Dissolved-Proteins of Diapause Eggs After Activating by Acid Treatment

Using HCl to activate the diapause eggs is a traditional technique of artificial hatching applied in silkworm egg production. Its mechanism has not yet been clarified. This experiment explored the effect of HCl on the termination of diapause of silkworm eggs cold-stored for 45 days from the point of proteomes. Two-dimensional electrophoresis techniques and ESI- MS-MS were used to compare and analyze the variation expression of difficult-dissolved-proteins of diapause eggs coldstored for 45 days before and after acid treatment. Through analysis on the two-dimensional electrophoretogram, there were 296 dots before acid treatment and 302 after the treatment, respectively. Amongst them 265 dots were matchable. The matchability reached 88.6%. There were 31 specific protein dots before acid treatment and 37 after acid treatment, respectively. ESI-MS-MS analysis was conducted for two specific protein-rich dots which disappeared after acid treatment. The results indicated that the sequence of No. 1 protein dot had 55 amino acids＇ peptide matched with those of chorion protein （Bombyx mori）. While the sequence of No. 2 protein dot had only 15 amino acids＇ peptide matched with those of heat shock protein hsp 19.9 （Bombyx mori）, and it was presumed to be an unknown protein. The difficult-dissolvedproteins of diapause eggs have variation expression after acid treatment. Some proteins before and after acid treatment are changed in MW.     

杏鲍菇形态特征获取的图像分割算法

食用菌工厂化生产中,菇房环境对食用菌生长的影响很大,由工人根据食用菌的形态特征来判断菇房环境是否适宜,会由于个体主观差异或人为因素不能及时判断,造成菇房环境调节滞后,影响了食用菌的产量和质量。以杏鲍菇为研究对象,提出了获取杏鲍菇形态特征的蚁群算法改进的模糊C均值(FCM)聚类分割算法,该算法能够针对杏鲍菇生产中获取的图像,进行有效地分割,从而满足自动获取杏鲍菇形态特征的需要。     

数字图像技术在草莓氮素营养诊断中的应用研究

为了探讨利用数字图像处理技术进行草莓氮素营养诊断的可行性,通过6个水平的氮肥田间试验,采用数码相机获取草莓冠层图像,分析了不同供氮水平下草莓冠层图像色彩参数与施氮量、土壤无机氮和植株氮素营养指标之间的关系.研究表明:数字图像技术应用于监测草莓的氮素供应状况是可行的.其中,不同氮素处理下G/B值与G/(R+G+B)值的决定系数较高,G/(R+G+B)值与土壤无机氮、叶片硝酸盐及植株全氮之间的决定系数最高,利用G/(R+G+B)值的范围得出草莓开花期与结果期的氮肥推荐用量,从而反馈草莓氮素营养状况,进行氮素营养诊断.     

农业科技服务系统中的基于复合混沌系统加密的图像信息保护算法

在农业科技服务系统构建中,关于农业科技信息的保护方面,提出一种基于复合混沌系统加密的数字水印嵌入算法,嵌入过程在要保护图像的RGB色彩空间经Contourlet变换后的域内进行。原始水印经过复合混沌加密后,重复嵌入到R、G、B各颜色分量的Cont-ourlet变换域低频分量中。水印提取时,可以根据R、G、B颜色分量Contourlet域低频系数值提取水印。实验结果证明,该水印算法可以抵抗JPEG压缩、中值滤波、加噪、剪切、旋转剪切等常规水印攻击,有效提升了水印的不可见性和鲁棒性。