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
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
基金the National Key R&D Program of China under Grant 2021YFE0203700Grant NSFC/RGC N CUHK 415/19,Grant ITF MHP/038/20,Grant CRF 8730063Grant RGC 14300219,14302920,14301121,CUHK Direct Grant for Research.
文摘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.
文摘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.
