ClarityHow to use this tool
- Enter transverse subject speed, exposure time, scene width at subject, image width.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
The method, explained
Blur pixels = transverse speed × exposure time × image pixels / scene width.
Using transverse subject speed = 1 m/s, exposure time = 0.01 s, scene width at subject = 5 m, image width = 6000 pixels, the result is 12 pixels. Change these example inputs to match your task; use the method above to check each step.
Understanding your result
Constant motion perpendicular to the camera axis and a fixed camera. Camera shake, depth changes and rolling shutter are excluded.
What to keep in mind
Constant motion perpendicular to the camera axis and a fixed camera. Camera shake, depth changes and rolling shutter are excluded. An ideal geometric or exposure estimate. Lens behavior, stabilization, sensor crop and scene conditions may change practical results.
Common questions
How do I use this motion blur in pixels calculator?
Estimate image displacement during exposure for a subject moving across a measured scene width. Enter transverse subject speed in m/s, exposure time in s, scene width at subject in m, image width in pixels. The starting example is editable; use values for the same system or project.
Which assumptions affect this result?
Constant motion perpendicular to the camera axis and a fixed camera. Camera shake, depth changes and rolling shutter are excluded.
Methodology maintained by ClarityKit. How these tools are built and checked.