共查询到18条相似文献,搜索用时 62 毫秒
1.
几何形态计量学在昆虫自动鉴定中的应用与展望 总被引:1,自引:0,他引:1
《四川动物》2013,(3)
几何形态计量学着重研究的是生物形态的拓扑结构信息,不受标本大小和形状变化的影响,是进行昆虫自动鉴定的一个新的手段。本文首先介绍了传统形态计量学和几何形态计量学两种昆虫自动鉴定的方法,并着重介绍了轮廓分析法和标志点分析法等几何形态计量学的分析方法,以及目前开发的几何形态计量学昆虫自动鉴定软件,简述了该方法应用于昆虫自动鉴定的工作流程,最后对几何形态计量学在昆虫自动鉴定方面的未来发展进行了展望。 相似文献
2.
【目的】本研究旨在探索使用先进的计算机视觉技术实现对昆虫图像的自动分类方法。【方法】通过预处理对采集的昆虫标本图像去除背景,获得昆虫图像的前景蒙板,并由蒙板确定的轮廓计算出前景图像的最小包围盒,剪切出由最小包围盒确定的前景有效区域,然后对剪切得到的图像进行特征提取。首先提取颜色名特征,把原来的RGB(Red-Green-Blue)图像的像素值映射到11种颜色名空间,其值表示RGB值属于该颜色名的概率,每个颜色名平面划分成3×3像素大小的网格,用每格的概率均值作为网格中心点的描述子,最后用空阈金字塔直方图统计的方式形成颜色名视觉词袋特征;其次提取OpponentSIFT(Opponent Scale Invariant Feature Transform)特征,首先把RGB图像变换到对立色空间,对该空间每通道提取SIFT特征,最后用空域池化和直方图统计方法形成OpponentSIFT视觉词袋。将两种词袋特征串接后得到该昆虫图像的特征向量。使用昆虫图像样本训练集提取到的特征向量训练SVM(Support Vector Machine)分类器,使用这些训练得到的分类器即可实现对鳞翅目昆虫的分类识别。【结果】该方法在包含10种576个样本的昆虫图像数据库中进行了测试,取得了100%的识别正确率。【结论】试验结果证明基于颜色名和OpponentSIFT特征可以有效实现对鳞翅目昆虫图像的识别。 相似文献
3.
4.
5.
6.
7.
昆虫图像分割方法及其应用 总被引:1,自引:0,他引:1
昆虫图像自动鉴定是一种快速鉴定昆虫的方法,图像分割则是其中关键步骤。通过搜集和整理国内外近年来针对昆虫图像的分割方法和研究,发现对昆虫图像分割的研究日趋增多。随着计算机图像技术的发展,昆虫图像分割方法吸收了许多图像分割领域中新兴的方法, 诸如采用水平集、边缘流以及结合形状、纹理、色彩等多种要素的智能分割(如JSEG方法)等。虽然大量的图像分割方法被引入到昆虫图像研究中,但是目前分割技术依然是阻碍昆虫图像广泛应用的关键。本文经过总结和分析,发现目前昆虫图像分割研究的往往在各自的测试集上有良好表现, 但是缺乏统一的评价标准, 因此很多方法在昆虫图像中应用难以推广。针对研究中的存在的这些问题,需建立良好的昆虫图像分割评价体系,本文建议通过建立统一的昆虫图像库以及对昆虫图像分割的评价方法深入研究,并且这些工作是当前昆虫图像分割研究亟待完善任务。 相似文献
9.
10.
11.
12.
T. K. Kleinhappel A. Al‐Zoubi B. Al‐Diri O. Burman P. Dickinson L. John A. Wilkinson T. W. Pike 《Journal of fish biology》2014,84(4):1228-1233
This paper describes and evaluates a flexible, non‐invasive tagging system for the automated identification and long‐term monitoring of individual three‐spined sticklebacks Gasterosteus aculeatus. The system is based on barcoded tags, which can be reliably and robustly detected and decoded to provide information on an individual's identity and location. Because large numbers of fish can be individually tagged, it can be used to monitor individual‐ and group‐level dynamics within fish shoals. 相似文献
13.
【目的】为了明确食物颜色对不同日龄昆虫体色的影响,并推广利用计算机视觉研究昆虫体色的技术。【方法】本研究以斜纹夜蛾Prodenia litura幼虫为实验材料,采用计算机定量分析的方法,对取食不同颜色型人工饲料的斜纹夜蛾幼虫头部、胸部斑纹、胸腹部和背中线的红色(R)、绿色(G)、蓝色(B)和明度(L)值进行了定量化分析。【结果】结果表明:幼虫的斑纹、胸腹部背面及侧面主色和背中线的R,G,B和L值随日龄增加而下降;头部R,G,B和L值在1-3日龄增加,后随日龄的增加而下降。幼虫体色变化也受食物颜色的影响,以对1-7日龄的影响为最大;红色型食物r∶g∶b=(128~251)∶(3~129)∶(6~96)对幼虫各部位体色的影响大于黄色、绿色和紫色的食物;幼虫取食不同颜色型食物后,各部位的变异系数大小依次为:斑纹胸腹部头部背中线。最后,建立了幼虫体色与食物色彩r,g,b值及日龄的回归方程。【结论】斜纹夜蛾幼虫体色受到食物颜色的影响,且在低龄时更为显著。 相似文献
14.
15.
Zhenqing Zhou Frans Vinberg Frank Schottler Teresa A Doggett Vladimir J Kefalov Thomas A Ferguson 《Autophagy》2015,11(10):1821-1832
Cones comprise only a small portion of the photoreceptors in mammalian retinas. However, cones are vital for color vision and visual perception, and their loss severely diminishes the quality of life for patients with retinal degenerative diseases. Cones function in bright light and have higher demand for energy than rods; yet, the mechanisms that support the energy requirements of cones are poorly understood. One such pathway that potentially could sustain cones under basal and stress conditions is macroautophagy. We addressed the role of macroautophagy in cones by examining how the genetic block of this pathway affects the structural integrity, survival, and function of these neurons. We found that macroautophagy was not detectable in cones under normal conditions but was readily observed following 24 h of fasting. Consistent with this, starvation induced phosphorylation of AMPK specifically in cones indicating cellular starvation. Inhibiting macroautophagy in cones by deleting the essential macroautophagy gene Atg5 led to reduced cone function following starvation suggesting that cones are sensitive to systemic changes in nutrients and activate macroautophagy to maintain their function. ATG5-deficiency rendered cones susceptible to light-induced damage and caused accumulation of damaged mitochondria in the inner segments, shortening of the outer segments, and degeneration of all cone types, revealing the importance of mitophagy in supporting cone metabolic needs. Our results demonstrate that macroautophagy supports the function and long-term survival of cones providing for their unique metabolic requirements and resistance to stress. Targeting macroautophagy has the potential to preserve cone-mediated vision during retinal degenerative diseases. 相似文献
16.
17.
Martin Bergman Ronald L. Rutowski 《Biological journal of the Linnean Society. Linnean Society of London》2016,117(3):646-654
Because of the important role sensory systems play in the behaviour of animals, information on sensory capabilities is of great value to behavioural ecologists in the development of hypotheses to explain behaviour. In compound eyes, interommatidial angles are a key determinant of visual acuity but methods for measuring these angles are often demanding and limited to live animals with a pseudopupil. Here we present a new technique for measuring interommatidial angles that is less demanding in terms of technology than other techniques but still accurate. It allows measurements in eyes without a pseudopupil such as dark eyes or even museum specimens. We call this technique the radius of curvature estimation (RCE) method. We describe RCE and validate the method by comparing results from RCE with those from pseudopupil analysis for the butterfly Asterocampa leilia. As an application of RCE we measure the eyes of the butterfly Battus philenor, a species whose visually guided behaviour is well known but whose eye structure and visual acuity are unknown. We discuss the results of the eye morphology in B. philenor in relation to their behaviour and ecology. We contend that RCE fills a gap in the repertoire of techniques available to study peripheral determinants of spatial resolution in compound eyes, because it can be applied on species with dark eyes. RCE then opens up for sampling a larger number of specimens, which, in combination with being able to use museum specimens, makes it possible to quantitatively test ecologically and evolutionarily driven hypotheses about vision in animals in a new way. 相似文献
18.
Experimental approaches to color pattern formation of lepidopteran insects have been made exclusively by analyzing pattern alterations in adult wings induced by operations. We microcauterized the presumptive black region of the dorsal forewing of the butterfly Pieris rapae and analyzed not only the resultant color pattern in the adult wing but also the cell behavior in the pupal wing epidermis around the injury. Cautery induced color alterations were as follows: (i) cautery up to 49.5 h after pupation resulted in white regions appearing within the black region while later cauteries induced larger white regions; (ii) cautery between 50 and 59.5 h resulted in the white regions induced by the cauteries being dramatically decreased; (iii) cautery after 60 h resulted in white regions that had almost disappeared. The examination of the cell behavior in the pupal wing epidermis after cauteries showed that the row formation of scale precursor cells was delayed. This delayed area varied with the time of cautery, in the same manner as that in the induced white area in the adult wing ((i) – (iii) above). The relationship between scale color alteration and the developmental delay of the scale row formation is discussed. 相似文献