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CaptureBeginner

ROI Capture to Increase FPS

Use Region of Interest to boost frame rate and improve lucky imaging results.

How It Works

1

Center the planet and set ROI just large enough to allow drift, about 1.5-2x the planet diameter.

2

Confirm the new fps and data rate in your capture software; aim to maximize fps without dropping frames.

3

Shorten exposure to match the higher fps. If exposure exceeds the frame interval, the fps gain is wasted.

4

Capture longer sequences to build a larger selection pool and improve the odds of sharp moments.

5

Monitor the preview to ensure the planet stays inside the ROI; widen slightly if tracking is weak.

6

After capture, verify that the ROI did not clip rings, moons, or transit features you care about.

Pro Tips

  • -Start with 640x480 or 800x600 for Jupiter and Saturn, smaller for Mars.
  • -Smaller ROI reduces file size and processing time significantly.
  • -Use guiding or small nudges to keep the planet centered.
  • -If seeing is poor, prioritize fps even if resolution is modest.
  • -Avoid overly tight ROI if your mount drifts or you want moon transits.
  • -Check USB bandwidth or storage speed to prevent dropped frames.

Related Algorithms

Weighted Quality Stacking
Your sharpest frames contribute most - ideal for variable seeing...
Intermediate
Local Quality Stacking
The AutoStakkert method - 30-40% more detail possible...
Advanced
Median Stacking
The safest choice - naturally rejects outliers and artifacts...
Beginner

Related Terms

ROI (Region of Interest)

Cropping the sensor to increase frame rate

Frame Rate (FPS)

Number of frames captured per second

Lucky Imaging

Selecting only the sharpest frames from a video

Try ROI Capture to Increase FPS

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