When capturing fast-moving subjects, the footage often appears blurry with persistent motion blur. Have you ever encountered this issue? The solution is actually quite straightforward—the key lies in the exposure time. Today, I'll show you how to completely eliminate blur during high-speed shooting using both hardware and software.

Exposure Time: The Root of Everything

Exposure time, also known as shutter speed, can be understood as the "valve" of light. The longer the valve remains open, the more light enters, resulting in a brighter image; the shorter the exposure time, the darker the image becomes.

For example, bottles on a high-speed conveyor belt will exhibit a blur on the image if the exposure time is too long—even a slight movement of a few millimeters will cause this effect. Conversely, if the exposure time is too short, the image appears too dark. This is the fundamental reason for blurring in high-speed photography.

Fish and Bear's Paw: The Exposed Dilemma

Theoretically, reducing the exposure time can eliminate motion blur, but this leads to insufficient lighting and darker images. With long exposures, sufficient brightness is achieved, yet motion blur persists. This exemplifies the classic trade-off between brightness and clarity.

Hardware Solution: Fundamental Solution (Recommended)

Large aperture lens

The larger the aperture, the more light enters—the effect is like pulling back the curtains, instantly brightening the room.

Case: When inspecting high-speed components, the surface mount device manufacturer used an F1.4 large-aperture lens, achieving clear images with minimal exposure time and sufficient brightness.

Large-pixel industrial camera

The larger the pixel size, the stronger its light sensitivity—just as a larger face can "detect raindrops" more effectively than a smaller one.

With the same exposure time, cameras with larger pixels produce brighter images and richer details.

High-brightness light source

Use short-duration pulse LEDs or stroboscopes to deliver intense light in an extremely brief period, compensating for insufficient light during short exposures.

Note: The highlight light source should have a short illumination duration, typically several tens of milliseconds; otherwise, it may burn out.

Case: During automotive tire quality inspection, a stroboscopic light is used under high-speed rotation to capture images within 10 milliseconds without any blur.

Software Solution: Emergency Parameter Adjustment (Use with Caution)

Adjust the gamma value: Increases the brightness of dark areas but makes the image appear gray and hazy.

Increase the gain value: The image becomes brighter, but noise increases and the roughness becomes more noticeable.

Binning: Increases sensitivity and brightness, but reduces resolution and loses details.

How to choose the optimal solution

Hardware takes precedence, with minimal side effects and stable performance; software parameter tuning is only suitable for emergency situations.

Production Summary

Photographing high-speed objects is challenging, but mastering exposure principles and adjusting parameters correctly makes it easy to handle various scenarios.