Technology Of Image Restoration And Application

The paper introduced image restoration technology and application in ultrasonicimage processing。There are a lot of methods of restoration image,but many methods ofimage restoration is only academic research,only a few methods may can apply inactual work。Basic methods of restoration image has been introduced in detail,then fourdefocus blurred image have regressed with regularized iterative arithmetic in frequencydomain,and then , this article introduced theory of type-B ultrasonic imaging,analysedprimary causation of type-B ultrasonic imaging just passable , then improvedtransverse resolution of type-B ultrasonic image with the way of wiener deconvolutionfilter.As the paper adopted the methods of rapid Fourier arithmetic and transform fromenormous interative matrix in dimensional domain to interative matrix can be acceptedin personal computer in frequency domain , and in the interative processing ofdimensional domain ,product of matrix can be turn into product of correspondingelement in frequency domain,then , EMS memory occupied in processing andruntimehave been reduced out and away, constringency of interative course isaccelerated with the way of regularized interative image restoration approach in thefrequency. This paper supposed radii of defocus blurred image is known. When we cannot know blurred radii of defocus blurred image,in the processing of searchingoptimal interative image,we may think defocus radii is a variable,then calculationalcapacity is increased greatly and time of constringency is prolonged,but time of onceinterative account isn't long,so the arithmetic is possible that the best value of defocusblurred radii has been searched as a variable. in addition,this article consider the sum ofsquare of gray-level gradient vector module as clarity-evaluation-function ofout-of-focus blurredred image and discuss in detail relationship amongclarity-evaluation-function and defocus blurred image as well as process of rebound .Type-B ultrasonic scan imaging is a brightness modulation display based on type-Ascan,Type-B scan can obtain section image of object paralleled withdiffuse direction ofsound sheaf ,display figure and size of disfigurement of detected plumb surface .but,at present,range of apparatus and structure unfurled by type-B ultrasonic image is verysmall,further more,resolution of type-B ultrasonic image is very low(especially themost important landscape orientation resolution ),at the same time,there are a lot offake images in type-B ultrasonic image,thus,when the doctor diagnose state of anillness along with type-B ultrasonic image,there are a lot of wrong diagnosticatebecause of blurred type-B ultrasonic image,delaied precious remedial time ,broughtserious aftermath. Thus,it is import that improving of definition of type-B ultrasonicimage with technique of image processing. At present,there are three methods ofimproving definition of type-B ultrasonic image: adopting transducer array;usingtechnique of dynamic focalizing and image enhancement. These methods can improvedefinition of type-B ultrasonic image,but,in some occasion,some of these methodsisn't applicable. such as, transducer array cann't use in ophthalmic type-B ultrasonic.Here ,we may use winner filter technique in image restoration improve landscapeorientation resolution of type-B ultrasonic image,obtaining relative true estimate ofultrasonic image. at the same time,we have restorated ulteasonic image offered byCo.KANGHUA in chongqing ,and improved transverse resolution.