简介：ＩｎｔｒｏｄｕｃｔｉｏｎＩｎＧｕｉｘｉＳｍｅｌｔｅｒ，ｃｏｐｐｅｒａｎｏｄｅｓｌｉｍｅｗａｓｔｒｅａｔｅｄｂｙｍｅａｎｓｏｆｔｅｃｈｎｏｌｏｇｉｃａｌｐｒｏｃｅｓｏｆｖｏｌａｔｉｌｉｚｉｎｇＳｅｉｎａｒｏｔａｒｙｋｉｌｎ，ｐｉｃｋｉｎｇｃｏｐｐｅ...

简介：Adual-beamelectronicspecklepatterninterferometry(ESPI)systemwasadoptedtogetspecklepatternsforthemeasurementofweldingdynamicdisplacementfields.Themathematicalmodelofthissystemwasdescribed,basedonwhichmethodsoftheESPIpatternimageprocessingwerediscussed.Graytransformationandhistogramequalizationwereusedtoenhancethecontrastofspecklepatterns.Adiscretecosineimageprocessingmethodwascarriedoutandanexponentlow-passfilterwaschosentoreducemultiplicativenoiseinspecklepatterns.Specklegrainnoisecanbeeliminatedeffectivelyaftertheseprocesses.

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