Electronic Image Stabilization (EIS) is a software-based technique used in cameras and smartphones to reduce blurring and shakiness in videos caused by hand movements or vibrations. Unlike Optical Image Stabilization (OIS), which relies on physical lens or sensor movement, EIS corrects motion digitally by cropping, aligning, and processing frames in real time.
How EIS Works:
- Motion Detection:
- Uses data from gyroscopes, accelerometers, and frame-to-frame analysis to detect unwanted camera movements.
- Frame Cropping & Alignment:
- The software crops the video slightly (usually 5-10%) to allow for adjustments.
- Aligns consecutive frames to compensate for shakes.
- Warping & Smoothing:
- Applies digital warping (pixel shifting) to stabilize the image.
- Smooths transitions between frames to avoid jitter.
Advantages of EIS:
✔ No extra hardware needed (unlike OIS).
✔ More affordable to implement in budget devices.
✔ Effective for moderate shakes in videos.
✔ Works with any lens (no moving parts required).
Disadvantages of EIS:
❌ Crops the frame, reducing resolution/FOV (field of view).
❌ Less effective in low light (can introduce artifacts).
❌ Can cause warping (jello effect) if overprocessed.
❌ Not as precise as OIS for extreme shakes.
EIS vs. OIS:
| Feature | EIS (Electronic) | OIS (Optical) |
|---|---|---|
| Method | Software-based | Hardware-based (lens/sensor shift) |
| Cost | Lower | Higher |
| Crop Factor | Yes (reduces FOV) | No (full sensor used) |
| Low Light Performance | Weaker (more noise) | Better (less blur) |
| Effectiveness | Good for minor shakes | Better for strong shakes |
Devices Using EIS:
- Most smartphones (especially mid-range/budget models).
- Action cameras (GoPro, DJI Osmo).
- Drones (DJI, Autel).
- Budget DSLRs & camcorders.
Improvements & Hybrid Systems:
Many flagship phones now use hybrid stabilization (OIS + EIS) for smoother results (e.g., iPhone, Samsung Galaxy, Google Pixel).