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| underwater_videography_with_gopro [2025/05/07 22:44] – include feet and round figures in attenuation table qlyoung | underwater_videography_with_gopro [2025/07/27 16:35] (current) – qlyoung | ||
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| | Depth (m) | Depth (ft) | Light Intensity (%) | | | Depth (m) | Depth (ft) | Light Intensity (%) | | ||
| |------------|------------|---------------------| | |------------|------------|---------------------| | ||
| - | | 0 | 0 | 100 | + | | 0 | 0 | 100% |
| - | | 5 | 15 | 78 | | + | | 5 | 15 | 78% | |
| - | | 10 | 35 | 61 | | + | | 10 | 35 | 61% | |
| - | | 15 | 50 | 47 | | + | | 15 | 50 | 47% | |
| - | | 20 | 65 | 37 | | + | | 20 | 65 | 37% | |
| - | | 25 | 80 | 29 | | + | | 25 | 80 | 29% | |
| - | | 30 | 100 | 22 | | + | | 30 | 100 | 22% | |
| - | | 35 | 115 | 17 | | + | | 35 | 115 | 17% | |
| - | | 40 | 130 | 14 | | + | | 40 | 130 | 14% | |
| - | | 45 | 150 | 11 | | + | | 45 | 150 | 11% | |
| - | | 50 | 165 | 8 | + | | 50 | 165 | 8% |
| Line 196: | Line 197: | ||
| Without this adjustment stabilization will still work, just not as well. GoPro Labs docs say that without it, Hypersmooth is about 70% effective compared to shooting in air. | Without this adjustment stabilization will still work, just not as well. GoPro Labs docs say that without it, Hypersmooth is about 70% effective compared to shooting in air. | ||
| + | |||
| + | To get an idea for the difference, compare the results of distortion correction calibrated for air (left) versus water (right): | ||
| + | |||
| + | {{: | ||
| + | |||
| ### GoPro specifics | ### GoPro specifics | ||
| Line 204: | Line 210: | ||
| - It is performed on the camera CPU in real time and thus has hard compute limits to contend with | - It is performed on the camera CPU in real time and thus has hard compute limits to contend with | ||
| - It does not know what will happen in the future and cannot benefit from the additional information; | - It does not know what will happen in the future and cannot benefit from the additional information; | ||
| + | - As mentioned above, distortion correction is not calibrated for water reducing stabilization quality | ||
| For these reasons I do not use Hypersmooth when shooting underwater. | For these reasons I do not use Hypersmooth when shooting underwater. | ||
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| - A binary track containing gopro-specific metadata. This is where gyro, GPS and other metadata is stored. | - A binary track containing gopro-specific metadata. This is where gyro, GPS and other metadata is stored. | ||
| - | By default, GyroFlow will drop the metadata tracks when producing a stabilized output. This metadata is valuable and other tools such as Telemetry | + | By default, GyroFlow will drop the metadata tracks when producing a stabilized output. This metadata is valuable and other tools such as Telemetr |
| + | y | ||
| + | Overlay rely on it to function, so you want to keep this track. | ||
| ## Denoising | ## Denoising | ||
underwater_videography_with_gopro.1746657848.txt.gz · Last modified: by qlyoung
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