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三种方法检测173例先天性红绿色觉异常患者的诊断效能比较
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作者 王培红 俞俊 +1 位作者 李朝辉 贾亮 《解放军医学院学报》 CAS 北大核心 2023年第7期774-779,786,共7页
背景先天性红绿色觉异常(color vision deficiency,CVD)的诊断存在分型不准,分度不明等问题。目的以Fornsworth Munsell-100 hue test(FM-100)色觉检测法为标准,评估《俞自萍色盲本》(俞本)、色盲检测(Color Blind Check,CBC)评分法对红... 背景先天性红绿色觉异常(color vision deficiency,CVD)的诊断存在分型不准,分度不明等问题。目的以Fornsworth Munsell-100 hue test(FM-100)色觉检测法为标准,评估《俞自萍色盲本》(俞本)、色盲检测(Color Blind Check,CBC)评分法对红绿CVD患者分型和严重度分度的判定能力。方法采用俞本、CBC评分和FM-100三种方法对2022年2-7月在解放军总医院眼科就诊的CVD患者进行检测,并以FM-100为标准,评价俞本和CBC评分的诊断效能和符合度。结果在纳入的173例患者中,检出红、绿色觉异常者比例,俞本为1.2%和12.7%,CBC评分为36.4%和62.4%,FM-100为19.1%和65.9%。严重度方面三种方法结果相似。以FM-100为金标准,俞本和CBC评分对先天性色觉异常分度诊断的敏感度和特异度分别为91.3%和38.5%、92.5%和46.2%,ROC曲线下面积分别为0.712和0.604。以FM-100为金标准,俞本和CBC评分对先天性色觉异常分型诊断:诊断红色觉异常的敏感度和特异度分别为0和15.8%、75.8%和78.9%,Kappa值分别为-0.125和0.490;诊断绿色觉异常的敏感度和特异度分别为15.8%和0、78.9%和75.8%,Kappa值分别为-0.125和0.490。平均检测时间:俞本<CBC评分<FM-100。结论俞本能够快速筛查CVD并初步判定严重度;CBC评分具有一定的分型和分度能力,结果稳定,耗时短,且无法作弊,具有一定的临床应用前景。 展开更多
关键词 先天性色觉异常 俞自萍色盲本 color Blind Check评分 FM-100色觉检测
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Saturation-Value Blind Color Image Deblurring with Geometric Spatial-Feature Prior
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作者 Hao Zhang Yingying Fang +2 位作者 Hok Shing Wong Lihua Li Tieyong Zeng 《Communications in Computational Physics》 SCIE 2023年第3期795-823,共29页
Blind deblurring for color images has long been a challenging computer vision task.The intrinsic color structures within image channels have typically been disregarded in many excellent works.We investigate employing ... Blind deblurring for color images has long been a challenging computer vision task.The intrinsic color structures within image channels have typically been disregarded in many excellent works.We investigate employing regularizations in the hue,saturation,and value(HSV)color space via the quaternion framework in order to better retain the internal relationship among the multiple channels and reduce color distortions and color artifacts.We observe that a geometric spatial-feature prior utilized in the intermediate latent image successfully enhances the kernel accuracy for the blind deblurring variational models,preserving the salient edges while decreasing the unfavorable structures.Motivated by this,we develop a saturation-value geometric spatial-feature prior in the HSV color space via the quaternion framework for blind color image deblurring,which facilitates blur kernel estimation.An alternating optimization strategy combined with a primal-dual projected gradient method can effectively solve this novel proposed model.Extensive experimental results show that our model outperforms state-of-the-art methods in blind color image deblurring by a wide margin,demonstrating the effectiveness of the proposed model. 展开更多
关键词 Blind color image deblurring quaternion geometric spatial-feature prior color space
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Prevalence and gene frequency of color vision impairments among children of six populations from North Indian region
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作者 Mohd Fareed Malik Azeem Anwar Mohammad Afzal 《Genes & Diseases》 SCIE 2015年第2期211-218,共8页
X-linked redegreen color blindness is the most widespread form of vision impairment.The study aimed to determine the prevalence and gene frequencies of redegreen color vision impairments among children of six differen... X-linked redegreen color blindness is the most widespread form of vision impairment.The study aimed to determine the prevalence and gene frequencies of redegreen color vision impairments among children of six different human populations of Jammu province.A total of 1028 healthy subjects(6e15 years of age)were selected from five Muslim populations and the color vision impairments were determined using the Ishihara’s test of color deficiency.The gene frequency was calculated using HardyeWeinberg equilibrium method.The prevalence of color vision deficiency(CVD)ranged from 5.26%to 11.36%among males and 0.00%e3.03%among females of six different populations.The gender based differences in the frequency of CVD was found to be statistically significant(p<0.0001),with a higher prevalence among male(7.52%)as compared to female(0.83%)children.We observed high frequency of deutan as compared to protan defects.The incidences of deuteranomaly(5.68%)and deuteranopia(2.27%)were higher among male children of Syed population while the frequencies of protanomaly(1.94%),protanopia(1.28%)and achromacy(2.27%)were the highest among male subjects of Khan,Malik and Syed populations,respectively.The allele and genotype frequencies showed cogent differences among six populations.The population based assessment of CVDs help patients to follow adaptive strategies that could minimize the risks of the disease. 展开更多
关键词 Allele frequency color blindness color vision deficiency Gene frequency GENOTYPES Human populations Public health Vision science
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