Timeline for Does QGIS and GDAL result in a loss of clarity when converting a 16-bit image to 8-bit?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Aug 21, 2023 at 20:30 | answer | added | user30184 | timeline score: 0 | |
| Aug 4, 2023 at 17:36 | comment | added | user30184 | I do not see any colors in the output from the code which makes me think if something fails also with handling the R, G, and B bands separately. | |
| Aug 4, 2023 at 13:56 | history | edited | addcolor | CC BY-SA 4.0 |
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| Aug 4, 2023 at 13:05 | comment | added | Vince | It is certainly the expectation that transforming a dataset with 65536 potential discrete values per band to one with only 256 will have data quality implications. Straight scaling is probably the wrong approach if you want to preserve contrast. | |
| Aug 4, 2023 at 12:56 | comment | added | Vincé | maybe totally irrelevant, but could it also be an issue only of how data is displayed in qgis rather than an issue with conversion? Could it be that you still need to adjust our min-max values in the symbology pane of the 8-Bit output-data rather than using those of the 16-bit image? | |
| Aug 4, 2023 at 12:50 | comment | added | user30184 | Does the source data have nodata value set? If you print the min_values/max_values, do they show reasonable values? | |
| Aug 4, 2023 at 12:28 | history | asked | addcolor | CC BY-SA 4.0 |