Noctvision

Machine vision and edge AI notes — optics, lighting, algorithms, edge inference

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  • Optics
  • Lighting Design
  • Vision Algorithm
  • Edge AI
  • About
  • Contact
  • Privacy Policy
  • Terms of Service
  • 한국어
  • English

Categories

  • Edge AI (12)
  • Lighting Design (9)
  • Optics (22)
  • Vision Algorithm (23)

Recent posts

  • AOI Only Says “Defective” — How Vision Language Models Fill the Gap in Judgment Rationale 2026-09-17
  • There Are Defects That Vanish in Visible Light — Inspection Design Beyond the 1 μm Barrier in SWIR Imaging 2026-09-16
  • Catching 20 μm Sink Marks in High-Gloss Injection-Molded Parts with Phase Measuring Deflectometry (PMD) — The Last Gap Polarization Fusion Fills 2026-09-15
  • Where the μm Step Disappears: Measuring Both-Side Thickness Simultaneously with a Two-Channel Chromatic Confocal Controller 2026-09-10
  • Camera Interface Bandwidth Determines Resolution — From GigE Vision to CoaXPress 2.0 2026-09-09
Lighting Design, Vision Algorithm

Dark-Field Illumination and Edge AI Defect Classification: A New Baseline for Specular-Surface Inspection

The smoother a surface looks, the harder it can be to inspect: specular reflection either saturates the sensor or buries shallow defects in near-zero contrast. Here is how dark-field illumination…

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2026-08-28
Lighting Design, Optics

There Are Defects That Vanish in Visible Light — Inspection Design Beyond the 1 μm Barrier in SWIR Imaging

A defect with no contrast in visible light must be seen by changing the wavelength. This article maps how SWIR imaging works, how Cu-Cu bonded sensors opened up pixel pitch,…

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2026-09-16
Lighting Design, Optics

Keeping Frame Rate and Lighting from Colliding on a High-Speed Inspection Line

Push frame rate up and exposure time shrinks, taking light and contrast with it. How frame rate, illuminance, bandwidth, and strobe-trigger timing all have to be designed as one system…

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2026-08-27
  • 2D·3D 융합 검사 도식 — 파장 분리 동시 촬상은 정합 오차 0, 시분할 촬상은 반송 200 mm/s에서 600 μm 오차
    Lighting Design

    2D/3D Fusion Inspection: The Bottleneck Is Lighting Interference

    Noctvision / 2026-08-19 / 0 Comments

    When a 2D camera and 3D profiler share the same wavelength band, no camera spec fixes it. Wavelength separation, not time-division capture, is usually the answer — and here is the math on…

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  • 3D 검사 전환 판단 기준 도식 — 2D와 3D의 검출 영역 경계를 나타낸 와이드 이미지
    Optics

    The Defect Zone You Miss When You Switch to 3D Inspection

    Noctvision / 2026-08-19 / 0 Comments

    A 3D profiler's planar (xy) resolution is coarser than 2D line-scan. See how to route defects between 2D and 3D by measured contrast, not size, with WD and optical-setup specs.

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  • 통합 CNN 검출-분류 구조 개념도
    Vision Algorithm

    Detection and Classification in One Model — The Trade-offs of KLA’s Unified CNN Patent

    Noctvision / 2026-08-18 / 0 Comments

    A look at KLA's unified-CNN patent (US10607119B2) for simultaneous defect detection and classification, and the tuning trade-off it creates versus separated pipelines.

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  • 2D 영상검사와 3D 높이데이터 AI 검사 비교 도식
    Vision Algorithm

    Shape Defects 2D Can’t Catch: When 3D+AI Inspection Is the Answer

    Noctvision / 2026-08-18 / 0 Comments

    SICK's Nova combines deep learning with 3D height-map data to catch shape defects 2D inspection misses, with on-device retraining from a handful of samples.

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  • Edge AI

    What Should a Camera See When a Humanoid Grasps an Object?

    Noctvision / 2026-08-18 / 0 Comments

    Humanoid grasping accuracy hinges on the vision/edge-AI pipeline -- a look at the on-device vs. cloud-offload trade-off and the INT8 quantization-loss problem.

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  • Edge AI

    What Changes in Vision Inspection When Logistics Automation Moves Into the Front End

    Noctvision / 2026-08-18 / 0 Comments

    As front-end semiconductor logistics automation expands, vision-based position checkpoints at transport handoffs become the standard defense against alignment drift.

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  • FP32에서 INT8로 양자화할 때 정밀도가 손실되는 경로를 나타낸 도식
    Edge AI

    It Worked Fine on the Server — Why Does Accuracy Drop on the Edge?

    Noctvision / 2026-08-13 / 0 Comments

    Accuracy that holds up on a server often drops on edge hardware -- usually the quantization step (FP32 to INT8), not the model, is the real cause.

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  • 과검출과 미검출을 구분하는 혼동 행렬 도식
    Vision Algorithm

    Overdetection vs. Missed Detection — Which One Costs More?

    Noctvision / 2026-08-13 / 0 Comments

    Overdetection and missed detection can't both be driven to zero -- a look at how threshold cost asymmetry, and KLA's nuisance-filtering patent, shape the trade-off.

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  • 정반사가 심한 표면에서 조명 각도에 따라 달라지는 반사광 경로 비교 도식
    Lighting Design

    How to Handle Imaging on Highly Reflective Surfaces

    Noctvision / 2026-08-05 / 0 Comments

    Five practical ways to handle blown-out highlights on specular surfaces -- angle changes, coaxial and dome lighting, polarization, and multi-shot compositing -- with the trade-offs of each.

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  • 작동거리·시야·센서 크기로 렌즈 초점거리를 산출하는 광학 배치 도식
    Optics

    How to Calculate Machine-Vision Lens Focal Length

    Noctvision / 2026-08-05 / 0 Comments

    A step-by-step method for calculating machine-vision lens focal length from working distance, field of view, and sensor size, plus the resolution check that follows it.

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Categories

  • Edge AI (12)
  • Lighting Design (9)
  • Optics (22)
  • Vision Algorithm (23)

Recent posts

  • AOI Only Says “Defective” — How Vision Language Models Fill the Gap in Judgment Rationale 2026-09-17
  • There Are Defects That Vanish in Visible Light — Inspection Design Beyond the 1 μm Barrier in SWIR Imaging 2026-09-16
  • Catching 20 μm Sink Marks in High-Gloss Injection-Molded Parts with Phase Measuring Deflectometry (PMD) — The Last Gap Polarization Fusion Fills 2026-09-15
  • Where the μm Step Disappears: Measuring Both-Side Thickness Simultaneously with a Two-Channel Chromatic Confocal Controller 2026-09-10
  • Camera Interface Bandwidth Determines Resolution — From GigE Vision to CoaXPress 2.0 2026-09-09
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