Real-Time Protein Crystallization Image Acquisition and Classification System.
Real-Time Protein Crystallization Image Acquisition and Classification System.
复制标题
DOI:
10.1021/cg3016029
复制
发表时间:
2013-07-03
影响因子:
3.8
通讯作者:
Aygun RS
中科院分区:
文献类型:
--
作者:
Sigdel M;Pusey ML;Aygun RS
In this paper, we describe the design and implementation of a stand-alone real-time system for protein crystallization image acquisition and classification with a goal to assist crystallographers in scoring crystallization trials. In-house assembled fluorescence microscopy system is built for image acquisition. The images are classified into three categories as non-crystals, likely leads, and crystals. Image classification consists of two main steps – image feature extraction and application of classification based on multilayer perceptron (MLP) neural networks. Our feature extraction involves applying multiple thresholding techniques, identifying high intensity regions (blobs), and generating intensity and blob features to obtain a 45-dimensional feature vector per image. To reduce the risk of missing crystals, we introduce a max-class ensemble classifier which applies multiple classifiers and chooses the highest score (or class). We performed our experiments on 2250 images consisting 67% non-crystal, 18% likely leads, and 15% clear crystal images and tested our results using 10-fold cross validation. Our results demonstrate that the method is very efficient (< 3 seconds to process and classify an image) and has comparatively high accuracy. Our system only misses 1.2% of the crystals (classified as non-crystals) most likely due to low illumination or out of focus image capture and has an overall accuracy of 88%.
登录
查看更多内容
DOI:
10.1007/s10969-009-9076-9
发表时间:
2010-03
期刊:
Journal of structural and functional genomics
影响因子:
--
作者:
Cumbaa, Christian A;Jurisica, Igor
通讯作者:
Jurisica, Igor
DOI:
10.1107/s090744490602943x
发表时间:
2006-10-01
影响因子:
2.2
作者:
Berry, Ian M.;Dym, O.;Messerschmidt, Albrecht
通讯作者:
Messerschmidt, Albrecht
DOI:
10.1107/s0907444905041648
发表时间:
2006-03-01
影响因子:
2.2
作者:
Pan, S;Shavit, G;Meldrum, D
通讯作者:
Meldrum, D
DOI:
10.1107/s0907444902016840
发表时间:
2002-11-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
Spraggon, G;Lesley, SA;Priestle, JP
通讯作者:
Priestle, JP
影响因子:
1.8
作者:
ZUK, WM;WARD, KB
通讯作者:
WARD, KB