Lighting controller for sea lice detection

A computer-implemented method comprising:

• illuminating a particular fish with pairs of discrete light pulses that are separated by time and that each include a pulse of red light and a pulse of blue light;
• controlling an exposure of a camera to (i) generate a first image of the particular fish during a pulse of one of the red light or the blue light during an initial pair of the light pulses, (ii) generate a second image of the particular fish during a pulse of an other of the red light or the blue color of light during the initial pair of the light pulses, (iii) and not generate an image during one or more succeeding pairs of the light pulses;
• and
• determining whether the particular fish is likely affected by a particular condition based on an analysis of at least the first image and the second image.

A computer-implemented method comprising:

• illuminating a particular fish with pairs of discrete light pulses that are separated by time and that each include a pulse of red light and a pulse of blue light;
• controlling an exposure of a camera to (i) generate a first image of the particular fish during a pulse of one of the red light or the blue light during an initial pair of the light pulses, (ii) not generate an image during a pulse of an other of the red light or the blue light during the initial pair of the light pulses as well as during a pulse of the one of the red light or the blue light during a succeeding pair of the light pulses, (iii) generate a second image of the particular fish during a pulse of the other of the red light or the blue light during the succeeding pair of the light pulses, (iv) not generate an image during a pulse of the one of the red light or the blue light during a subsequent pair of the light pulses as well as during a pulse of the other of the red light or the blue light during the subsequent pair of the light pulses, and (v) generate a third image of the particular fish after the subsequent pair of the light pulses but before a further pair of the light pulses;
• and
• determining whether the particular fish is likely affected by a particular condition based on an analysis of at least the first image and the second image.