Camera quick controls allows you to control your camera quickly and easily, it has the following features:
- Capture Preview
- Video Streaming
- Live Stacking
- Quick Settings
Editing Camera Settings
You can quickly take custom preview captures or loop frames by tweaking the settings in the quick settings bar by tapping on the Quick Settings button. The quick settings bar can be expanded by tapping on the up expand arrow on the left side of the bar. Note: choosing a temperature will set the temperature immediately.
Capturing a preview image, looping or video streaming
You can capture a preview image by tapping on the Camera button. Looping can be done as well by tapping on the Loop button (repeat icon). You can also stream live video from your camera by clicking on the Video Streaming button. An animated circular progress icon will show the progress of the current capture and will show you when the image is being downloaded to the app by showing a green cloud download icon.
You can stop the capturing process by tapping on the Stop button anytime while it's capturing.
StellarMate also features Live Stacking, which can be turned on by clicking on the LIVE button. This will start live stacking process in which images are stacked to increase the signal to noise ratio. It utilizes a median stacking algorithm and automatic background extraction follow by contrast adjustments to bring out the details.
Sigma clipping helps with noise reduction during the stacking process. The mean and standard deviation are calculated from the first three captures. Subsequent captures are then sigma-clipped to remove any outliers outside the envelope of acceptable ranges around the mean.
The diagram below shows how values outside the envelope are masked and not included in the stacking process. You can control the upper and lower limits of this envelope by adjusting the slower and supper (default is set to 3) parameters in the app.
The contrast and saturation controls do not affect the stacking process itself, but apply some cosmetic adjustments to the final image to improve its quality. Some non-nebulae objects might benefit from the automatic background subtraction controlled by the Background parameter. Increasing this value would attempt to compensate for sky glow in the background, but might also result in loss of detail.