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Multi-modal fusion image sorting method based on RLS-ELM

A technology that integrates images and classification methods. It is used in character and pattern recognition, instruments, computer parts, etc. It can solve the problems of long training time and large storage space, and achieve the effect of improving classification accuracy and classification speed.

Active Publication Date: 2015-06-17
CENT SOUTH UNIV
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Problems solved by technology

Secondly, the SVM algorithm that fMRI researchers are keen on has problems such as long training time and large storage space.

Method used

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  • Multi-modal fusion image sorting method based on RLS-ELM
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  • Multi-modal fusion image sorting method based on RLS-ELM

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0023] see figure 1 , figure 2 , image 3 , the multimodal fusion image classification method based on RLS-ELM contains the following steps:

[0024] Step 1: Obtain the rs-fMRI, sMRI and DTI data of multiple subjects, and perform preprocessing to eliminate the test data that does not meet the regulations.

[0025] Step 2: Calculate the ReHo (Regional Homogeneity) value of each voxel in the rs-fMRI data.

[0026] Step 3: Calculate the gray matter density (Gray Matter Density) value of each voxel in the sMRI data.

[0027] Step 4: Calculate the FA (Fractional Anisotropy) value of each voxel in the DTI data.

[0028] Step 5: Connect the ReHo, gray matter density and FA value of each voxel into a new feature matrix A.

[0029] Step 6: Carry out PCA dimension reduction processing on the new feature matrix A.

[0030] Step 7: Train the RLS-ELM classifier...

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Abstract

The invention discloses a multi-modal fusion image sorting method based on RLS-ELM. The method is characterized by comprising the steps that 1. rs-fMRI, sMRI and DTI data of a plurality of tested objects are obtained, preprocessing is carried out, and tested data which do not accord with a provision are removed; 2. ReHo values of voxels in the rs-fMRI data are computed; 3. grey matter density values of voxels in the sMRI data are computed; 4. FA values of voxels in DTI data are computed; 5. the ReHo values, the grey matter density values and the FA values of the voxels are connected to form a new characteristic matrix A; 6. the new characteristic matrix A is subjected to PCA dimension reduction processing; and 7. an RLS-ELM sorter is subjected to training, and a trained RLS-ELM sorter is obtained. According to the multi-modal fusion image sorting method based on RLS-ELM, sorting accuracy and sorting speed are obviously improved, disease early discovering and early treating are achieved, and great significance is achieved in a clinical medicine study process for revealing disease progression is achieved.

Description

technical field [0001] The invention relates to a multimodal fusion image classification method, in particular to a multimodal fusion image classification method for diseases. Background technique [0002] In the past two decades, with the advancement of brain imaging technology, brain science research has entered a period of rapid development. Functional magnetic resonance imaging (fMRI), as a non-invasive brain function detection technology, has become the most widely used brain imaging technology in brain science research due to its good comprehensive performance of time and space resolution. [0003] Resting state rs-fMRI (resting-state fMRI, rs-fMRI) is the spontaneous regulation of brain BOLD signal, reflecting the spontaneous activity of the brain in the resting state, reflecting the association between brain regions and the operating mechanism of the brain. Therefore, rs-fMRI is more suitable for the research of some chronic diseases and mental diseases clinically. ...

Claims

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Application Information

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IPC IPC(8): G06K9/62G06K9/46
Inventor 龙军阳洁张祖平张昊
Owner CENT SOUTH UNIV
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