Scientific Computing & Data Science

Original Article: http://optics.org/news/8/4/7 Cognex acquires Swiss software firm ViDi06 Apr 2017 Machine vision specialist buys provider of artificial intelligence techniques for improved image analysis. Vision systems Massachusetts-based industrial machine vision company Cognex has acquired the Switzerland-headquartered software startup ViDi Systems, establishing a foot-hold in the emerging a..

Machine Vision Camera & Illumination Types of Light SourcesIncandescent Lamps: 3000 ~ 3400KXenon Lamps: 5500 ~ 12000KFluorescent Lamps: 3000 ~ 6000KLED: Primary choice of illumination, inexpensive, long-term, flash light, different colorsUsing Polarity of LightUsing polarized light and having an additional analyzer (polarization filter) in front of camera can reduce specular reflectionsDirection..

Introduction to Machine Vision LightingDefinitionMachine vision lighting is the component of vision system that illuminates a part or feature to be inspected.3 Elements Needed to Make an ImageCameraPartIlluminationUnderstanding Lighting ConceptsMaximize contrast on desired featuresMinimize contrast on the rest of the partHow to Create Contrast1. GeometryChange the light direction to improve cont..

Machine Vision Lighting Geometry

Introduction to Machine Vision Part 3, Key Parts of a Vision System 5 Components of Machine Vision1. LightingPosition between camera and light, lighting types2. LensFOV, DOF, WD, Aperture3. SensorCCD, CMOS4. Vision ProcessingImage Processing AlgorithmsAcquire Images → Pre-processing → Analysis → Geometry & Tolerance → Results5. CommunicationDiscrete I/O, Data (RS-232, Ethernet, EhterNet/IP, etc.)

Introduction to Machine Vision Part 2, Why Use Machine Vision? Machine Vision의 목적1. Reduce defects - 제품의 하자 또는 잘못된 라벨링을 검출할 수 있음.2. Increase yield - Just in-time process 등으로 생산성 향상을 시킬 수 있음.3. Comply with regulations - 제품 생산을 위한 복잡한 규칙을 프로그램화하여 일관적인 규약을 따를 수 있음.4. Track and trace - 특정 제품에 ID를 부여하고 이를 추적할 수 있음.

Introduction to Machine Vision Part 1, Definition & Applications DefinitionThe automatic extraction of information from digital images.Why Use Machine Vision?1. Faster: 사람이 하는 것보다 훨씬 빠르게 작업을 처리할 수 있음. 1초에 1000개를 처리할 수 있을 정도로.2. More Consistent: 사람이 한다면 개인차가 있을 수 밖에 없지만, 기계가 처리하므로 일관되게 작업을 처리할 수 있음.3. Longer: 전기만 계속 공급해 준다면 무한히 작업을 처리할 수 있음. 사람은 쉽게 피로를 느끼며 집중력에 한계가 있음.4 Most Common Uses1. Measure..