改进的OTSU算法及其定量评价分析的PCB光电图像分割方法的研究

应用背景直方图均衡化（他）isasimpleandeffectivetechniqueforenhancingthecontrastoftheinput图像。然而，itfailstopreservethebrightnesswhileenhancingthecontrastduetotheabruptmeanshiftduringtheprocessofequalization.manyhebasedmethodshavebeendevelopedtoovercomethe问题ofmeanshift。但是，theysufferedfromover增强。在本文中，一objectivehehasbeenproposedinordertoenhancethecontrastaswellastopreservethebrightness的模型。中央ideaofthistechniqueisto第一segmentthehistogramoftheinputimageintotwousingotsu的门槛。asetofoptimizedweighingconstraintsareformulatedandappliedonboththesub图像。然后，子imagesareequalizedindependentlyandtheirunionproducesthecontrastenhanced，亮度preservedoutputimage。关键技术contrastenhancementtechniquesareusedinimageandvideo处理toachievebettervisualinterpretation一般，histogramequalizationbasedcontrastenhancementisattained通过theredistributionofintensityvaluesofaninputimage。histogrammodification istheunderlyingstrategyformostofthe对比度增强技术（他）是直方图均衡化。一ofthemostwidelyusedtechniquestoachievecontrast增强，duetoi