Image recognition is considered to be the pre-eminent paradigm for the automatic detection of tumor diseases in this era.Among various cancers identified so far,glioma,a type of brain tumor,is one of the deadliest can...Image recognition is considered to be the pre-eminent paradigm for the automatic detection of tumor diseases in this era.Among various cancers identified so far,glioma,a type of brain tumor,is one of the deadliest cancers,and it remains challenging to the medicinal world.The only consoling factor is that the survival rate of the patient is increased by remarkable percentage with the early diagnosis of the disease.Early diagnosis is attempted to be accomplished with the changes observed in the images of suspected parts of the brain captured in specific interval of time.From the captured image,the affected part of the brain is analyzed using magnetic resonance imaging(MRI)technique.Existence of different modalities in the captured MRI image demands the best automated model for the easy identification of malignant cells.Number of image processing techniques are available for processing the images to identify the affected area.This study concentrates and proposes to improve early diagnosis of glioma using a preprocessing boosted teaching and learning optimization(P-BTLBO)algorithm that automatically segments a brain tumor in an given MRI image.Preprocessing involves contrast enhancement and skull stripping procedures through contrast limited adaptive histogram equalization technique.The traditional TLBO algorithm that works with the perspective of teacher and the student is here improved by using a boosting mechanism.The results obtained using this P-BTLBO algorithm is compared on different benchmark images for the validation of its standard.The experimental findings show that P-BTLBO algorithm approach outperforms other existing algorithms of its kind.展开更多
提出了一种基于协同进化教与学优化(Co-evolutionary Teaching-and-Learning based Optimization,CTLBO)算法的二维最大熵多阈值分割方法。首先,给出了二维熵多阈值分割的最优化模型。然后,针对教与学优化(Teaching-and-Learning based ...提出了一种基于协同进化教与学优化(Co-evolutionary Teaching-and-Learning based Optimization,CTLBO)算法的二维最大熵多阈值分割方法。首先,给出了二维熵多阈值分割的最优化模型。然后,针对教与学优化(Teaching-and-Learning based Optimization,TLBO)算法存在的早熟收敛和停滞问题,提出了一种CTLBO算法,并将该算法应用于二维熵多阈值分割最优化模型的求解。该算法将整个班级分为多个子班级,每个子班级的学员同时向所有子班级的老师学习,从而提高种群多样性。此外,每隔一定的代数,各子班级的老师组成新的班级进行信息交流,从而提高收敛速度。最后,应用仿真实验对所提方法的有效性和可行性进行了验证。实验结果表明:与基于传统TLBO算法及其相关改进算法、粒子群算法的图像分割方法相比,所提方法具有更好的优化能力和分割性能。展开更多
文摘Image recognition is considered to be the pre-eminent paradigm for the automatic detection of tumor diseases in this era.Among various cancers identified so far,glioma,a type of brain tumor,is one of the deadliest cancers,and it remains challenging to the medicinal world.The only consoling factor is that the survival rate of the patient is increased by remarkable percentage with the early diagnosis of the disease.Early diagnosis is attempted to be accomplished with the changes observed in the images of suspected parts of the brain captured in specific interval of time.From the captured image,the affected part of the brain is analyzed using magnetic resonance imaging(MRI)technique.Existence of different modalities in the captured MRI image demands the best automated model for the easy identification of malignant cells.Number of image processing techniques are available for processing the images to identify the affected area.This study concentrates and proposes to improve early diagnosis of glioma using a preprocessing boosted teaching and learning optimization(P-BTLBO)algorithm that automatically segments a brain tumor in an given MRI image.Preprocessing involves contrast enhancement and skull stripping procedures through contrast limited adaptive histogram equalization technique.The traditional TLBO algorithm that works with the perspective of teacher and the student is here improved by using a boosting mechanism.The results obtained using this P-BTLBO algorithm is compared on different benchmark images for the validation of its standard.The experimental findings show that P-BTLBO algorithm approach outperforms other existing algorithms of its kind.
文摘提出了一种基于协同进化教与学优化(Co-evolutionary Teaching-and-Learning based Optimization,CTLBO)算法的二维最大熵多阈值分割方法。首先,给出了二维熵多阈值分割的最优化模型。然后,针对教与学优化(Teaching-and-Learning based Optimization,TLBO)算法存在的早熟收敛和停滞问题,提出了一种CTLBO算法,并将该算法应用于二维熵多阈值分割最优化模型的求解。该算法将整个班级分为多个子班级,每个子班级的学员同时向所有子班级的老师学习,从而提高种群多样性。此外,每隔一定的代数,各子班级的老师组成新的班级进行信息交流,从而提高收敛速度。最后,应用仿真实验对所提方法的有效性和可行性进行了验证。实验结果表明:与基于传统TLBO算法及其相关改进算法、粒子群算法的图像分割方法相比,所提方法具有更好的优化能力和分割性能。
