With the aim to meet the requirements of multi-directional choice, the paper raise a new approach to the invariant feature extraction of handwritten Chinese characters, with ridgelet transform as its foundation. First of all, the original images will be rotated to the Radon circular shift by means of Radon transform. On the basis of the characteristic that Fourier transform is row shift invariant, then, the one-dimensional Fourier transform will be adopted in the Radon domain to gain the conclusion that magnitude matrixes bear the rotation-invariance as a typical feature, which is pretty beneficial to the invariant feature extraction of rotation. When such is done, one-dimensional wavelet transform will be carried out in the direction of rows, thus achieving perfect choice of frequency, which makes it possible to extract the features of sub-line in the appropriate frequencies. Finally, the average values, standard deviations and the energy values will form the feature vector which is extracted from the ridgelet sub-bands. The approaches mentioned in the paper could satisfy the requirements from the form automatic processing on the recognition of handwritten Chinese characters.
BACKGROUND
Background: Vascular cognitive disability (VCI) includes various degrees of mental decline related to cerebrovascular disease. It refers to the basic pathological process of the formation of Alzheimer's disease. Its early diagnosis and treatment are beneficial to improve the prognosis of patients.
OBJECTIVE
Objective: To explore the effect of individualized therapy based on brain rehabilitation health measurement system on the cognitive function and event-related potential (ERP) P300 of patients with vascular cognitive impairment no dementia (VCIND).
METHODS
Methods: Sixty patients with non-dementia vascular cognitive impairment were randomly divided into a training group and a control group. Both groups were given conventional medication and traditional rehabilitation training. Based on it, the training group added cognitive training of the brain rehabilitation health measurement system, 40 minutes/time, once a day, 5 times a week for 4 weeks. Then, the mini-mental state examination (MMSE), Montreal cognitive assessment (MoCA), Barthel Index (BI) and myoelectric evoked potential were used to measure and evaluate the cognitive function, daily life activities and P300 of the two groups of patients.
RESULTS
Results: After treatment, the MoCA score, MMSE, BI score, visual space and executive function, attention, language function, and delayed memory of the training group were significantly improved compared with the control group, and the difference was significant (P <0.05). The incubation period of P300 in the training group was shorter than that in the control group, and the amplitude was higher than that in the control group, the difference was statistically significant (P <0.05).
CONCLUSIONS
Conclusions: Brain rehabilitation health measurement system assisted cognitive training can effectively improve the cognitive function and daily activities of VCIND patients.
CLINICALTRIAL
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