View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0002058 | CCdciel | General | public | 19-01-20 01:22 | 19-02-03 20:29 |
| Reporter | han | Assigned To | Patrick Chevalley | ||
| Priority | low | Severity | tweak | Reproducibility | have not tried |
| Status | resolved | Resolution | fixed | ||
| Target Version | 1.0 | ||||
| Summary | 0002058: Visualisation, use of histogram and 90,95, 96, 98 buttons | ||||
| Description | 1) After connecting my old QHY8, i noticed that the Visualisation 90,95, 96, 98 buttons aren't doing much. Most effective tools are the gamma setting and red/green sliders in the histrogram. Suggest to review working and improve. Attached one of my QHY8 images taken during foggy conditions. 2) When auto focusing is executed (read only a smart part of the sensor) , the QHY8 behaves strange and the histogram values change significantly (and go up) and screen becomes fully white. This odd behavior is a problem of the QHY8 but it would be nice if CCDCIEL could adapt to a different histogram values for sub section of the sensor. So I wish a more flexible and robust automatic brightness and contrast settings. I required, I could try myself to improve the code and behavior. | ||||
| Tags | No tags attached. | ||||
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The problem is the very low image contrast above the high background level. I change the auto-level detection to ignore everything below the mean sky background, i.e. the below the peak of the histogram: https://github.com/pchev/ccdciel/commit/92ebab699f4260256f4827c95e6a911a03178984 This give a much darker sky and the nebula are better detected. For this image the signal is still low but the galaxy is now clearly visible. This also improve the display for all the other images I tested. Can you try if this also work for your other images and if this improve the display during focusing? |
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The images are now much better presented. I need a field trial to test is during auto-focus. This has to wait for clear weather. |
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Current version works well. No problems. Problem is solved :) |
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Good! thank you. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 19-01-20 01:22 | han | New Issue | |
| 19-01-20 01:22 | han | File Added: M33_120s_20190109_191626.zip | |
| 19-01-20 18:22 | Patrick Chevalley | Assigned To | => Patrick Chevalley |
| 19-01-20 18:22 | Patrick Chevalley | Status | new => feedback |
| 19-01-20 18:22 | Patrick Chevalley | Note Added: 0005258 | |
| 19-01-22 14:31 | han | Note Added: 0005268 | |
| 19-01-22 14:31 | han | Status | feedback => assigned |
| 19-02-03 18:52 | han | Note Added: 0005316 | |
| 19-02-03 20:29 | Patrick Chevalley | Status | assigned => resolved |
| 19-02-03 20:29 | Patrick Chevalley | Resolution | open => fixed |
| 19-02-03 20:29 | Patrick Chevalley | Target Version | => 1.0 |
| 19-02-03 20:29 | Patrick Chevalley | Note Added: 0005317 |
