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What if the Image is Blurry?

This page walks through common causes and solutions for blurry images in the OV20i system. Includes both manual lens focus and the software-based focus slider.

Common Causes of Blurry Images​

CauseDescription
Out of FocusLens not tuned for distance, or digital focus not calibrated
Long Exposure + MotionPart moves during capture, creating motion blur
Low Light + High GainGain boosts image but reduces clarity
Dirty LensSmudges or debris on the camera lens
Improper MountingWrong distance for selected lens focal length

Fixing Blurry Images​

1. Use the Focus Slider in Software​

  • Go to Image Settings in the OV20i HMI
  • Locate the Focus Slider
  • Adjust slider while viewing live preview
  • Find the sharpest image and save settings
note

This is recommended for most operators and avoids physical refocusing. Only available on supported lens models.

2. Manual Lens Focus (if needed)​

  • Loosen the lock ring on the lens
  • Rotate the lens to achieve a sharp image
  • Use live preview to guide adjustments
  • Re-tighten the lock ring
  • Use proper spacing

3. Shorten Exposure to Reduce Blur​

  • Go to Image Settings
  • Reduce exposure time (e.g., from 10 ms → 3 ms)
  • Useful for moving parts
warning

You may need brighter lighting to compensate.

4. Add or Increase Lighting​

  • Use OV20i's onboard strobe or external lighting
  • Confirm even illumination across the ROI

5. Adjust Gain Sensibly​

  • Too much gain adds noise and reduces clarity
  • Try reducing gain and adding light instead

6. Clean the Lens Cover​

  • Use a microfiber cloth or lens cleaning wipe
  • Avoid alcohol or abrasive solutions

Still Not Sharp?​

  • Use the Test Image button for static validation
  • Compare images to your recipe's training data
  • Retrain if appearance has changed significantly

🔗 See Also​