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Understanding Camera Shake and Motion Blur: A Guide to Inconsistent Light and Image Stabilization

This guide explores the effects of camera shake on image blur, highlighting the various degrees of freedom involved, including rotational, lateral, and longitudinal shake. It delves into how inconsistent light and movement impact image quality, emphasizing the importance of maintaining a stable field of view to minimize blur. Techniques, such as using tripods, image stabilization technologies, and specific shutter release methods, are discussed to help photographers capture clearer images even under challenging conditions.

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Understanding Camera Shake and Motion Blur: A Guide to Inconsistent Light and Image Stabilization

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Presentation Transcript

  1. No Blur in the Image Sensor Consistent light

  2. Motion Blur in the Image Sensor Inconsistent light

  3. Camera shake blur in the Image Sensor Inconsistent light

  4. Camera Shake Three (3) Degrees of Freedom: Rotational shake Lateral Shake Longitudinal Shake

  5. Image Frame As camera shakes/rotates, the image frame that it covers (“field of view”) shifts Capturing inconsistent image yields blur

  6. Image Frame If the camera shakes less, the image changes less More consistent image yields less blur

  7. Wider angle of view means same physical rotation/shake alters field of view less This more consistent image yields less blur

  8. Large shake Narrow angle Small shake Narrow angle Large shake Wide angle

  9. How much blur? Displacement amount Φ = angle of rotation (shake) θ = angle of view 1 frame length Displacement amount 1 frame length

  10. How much blur? Displacement amount Δx = camera displacement r = subject distance 1 frame length θ = angle of view Displacement amount 1 frame length

  11. How much blur? Displacement amount r = subject distance θ = angle of view 1 frame length Δz = camera displacement 1 frame length Displacement amount

  12. Rotational shake Lateral shake Longitudinal shake

  13. Shutter speed rule Focal length (mm)

  14. Shake reduction techniques Tripod! Image stabilization (IS, VR, VC, OS, etc.) Shutter release Delay shutter Second shot Breathing method Holding technique Multi shot Wider angle Improvised tripods

  15. Blur in the Image Sensor Camera shake

  16. Sensor-shift stabilization Shifts sensor against camera movements Return

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