Why underwater footage is hard
Cameras in fish farms run for months in changing light, murky water and biofouling. Large parts of the recordings can be unusable for training even though every file plays.
What to check
- Lens fouling: algae or dirt on the lens shows as a blurred region that stays in place while fish move.
- Dark footage: night, depth and weather leave long stretches with too little light.
- Frozen footage: camera or encoder faults repeat the same frame.
- Turbidity and blur: particles and murky water remove the detail a model needs.
- Broken files: recordings that stop decoding part-way.
Report time ranges
Mark where each problem starts and ends, so you keep the usable minutes of a recording instead of discarding the whole file.
Counting fish
Counting the objects you care about across your footage (check with us whether your object is on our approved list) shows how much useful data you actually have, and where it is.
Sample densely enough
Short events disappear between sparse samples. Choose the sampling rate from the shortest problem you care about. See video dataset quality.