Independent Component Analysis Technique Applied In Fingerprint Extraction

Today,computer technology in fingerprint identification is more widely used,has becomeone of the digital fingerprint identification fingerprint identification technology direction forfurther development.Currently in fingerprint identification,we often use VSC-5000DocumentRetrieval Instrument will be taken to check fingerprints on the computer,and then use imageprocessing software photoshop enlarged fingerprint characteristics were observed,analyzedand compared.Although this approach is simple,but compared with the fingerprint extractionfigures look unprofessional.Because the use of the text in the image detection instrument forextracting fingerprint formed,there will be a variety of confounding factors,and in criminalcases,on-site extraction of traces,such as fingerprints,traces its object(such as bedsheets,books,clothing,blood,desk and other items)are mostly complex background,colorclutter,color varies with VSC-5000,after extraction,has become a hybrid fingerprintimage,fingerprint feature points are even covered ridge,bringing to fingerprint analysis andidentification work great difficulties.Therefore,the study of digital fingerprinting isparticularly important,it can not only be traces of fingerprints and traces particularly effectiveseparation of the object,the object of removing traces of interference,to get clear and reliablefingerprint image,but also improves the efficiency of identification for the investigation ofcases provide timely basis.In the field of image analysis and processing,independent component analysis is alsoslowly showing broad prospects for development.As a new signal processingmethod,independent component analysis algorithm in image understanding,especiallyseparation of images exhibiting excellent potential.Because of the characteristics of higherorder statistics and the basic characteristics between pixels of the image signal having asimilar nature,and therefore,in theory,the image processing based on independent componentanalysis can be achieved.Fingerprint identification,we can leave marks and fingerprint object as a plurality ofsource signals mixed,because the independent component analysis during channelequalization response of the antenna array does not require a priori knowledge does notrequire any training signals,or in a very harsh multi-path fading environment,these algorithmsare usually still very healthy.So you can put the fingerprint we need to restore it.Theindependent component analysis technique used in fingerprint identification that can help improve the efficiency of fingerprint identification,so that the fingerprint to better serve thecriminal investigation service,providing strong evidence for the litigation.From the four parts to explore how the independent component analysis techniqueapplied to the fingerprint extraction.The first part is sort of related concepts.Digital image processing concept based digitalfingerprint technology as a starting point,the introduction of independent component analysistechniques.The second part of the first elaborated the concept and model of independent componentanalysis,to introduce its prospects through basic approach depends,finally elaborated theindependent component analysis applied to the fingerprint extraction motive,that is composedof three parts,one fingerprint bottleneck identification of the decision;Second,thecharacteristics of the fingerprint image of the decision;Third,the advantage of independentcomponent analysis of the decision.The third part of the second part on the basis of conducted experiments mixingfingerprint images, including the preparation before the experiment, analyze the formatselected simulation experiments based environment, as well as an image, then introduced thehybrid fingerprint image preprocessing, That noise smoothing in order to better analyze theeffect of separation, we separated into convergence, balanced, intelligent enhancement andfour parts separated by a continuation of the four parts of the experiment, it can be seen howthe technique is independent of the separation and analysis mixed fingerprint imageseparation step by step.