A method comprising: activating a strobed or pulsed illumination source to produce illuminating light; polarising the illuminating light in a first polarisation axis; illuminating at least part of a tall plant crop with the polarised illuminating light to produce reflected illuminating light; polarising the reflected illuminating light in a second polarisation axis transverse to the first polarisation axis produce cross-polarised reflected illuminating light; capturing an image of at least part of the tall plant crop using the cross-polarised reflected illuminating light; and analysing the captured image to determine a condition of the tall plant crop. Also a vehicle mounted image capture system, a vehicle mounted spraying system and a plant health management system.

An imaging system having a forward and rearward orientation and comprising: (a) one or more parabolic reflectors having a base, a focus, and a reflector axis, said one or more parabolic reflectors defining a central reflector axis; (b) at least one a light source disposed near or essentially at said focus of each of said one or more parabolic reflectors forward of its base; and (c) an imaging device disposed within said one or more parabolic reflectors, and comprising a zooming lens having an optical axis essentially coincident with said central reflector axis.

An imaging system having a forward and rearward orientation and comprising: (a) one or more parabolic reflectors having a base, a focus, and a reflector axis, said one or more parabolic reflectors defining a central reflector axis; (b) at least one a light source disposed near or essentially at said focus of each of said one or more parabolic reflectors forward of its base; and (c) an imaging device disposed within said one or more parabolic reflectors, and comprising a zooming lens having an optical axis essentially coincident with said central reflector axis.

A system for external fish parasite monitoring in aquaculture, the system comprising: —a camera (52) suitable to be submerged in a sea pen suitable for containing fish, the camera being arranged for capturing images of the fish; and —an electronic image processing system (86) configured for identifying external fish parasites on the fish by analyzing the captured images, characterized by a camera and lighting rig (10) having a vertical support member (14), an upper boom (16) articulated to a top end of the support member (14) and carrying an upper lighting array (22), a lower boom (18) articulated to a lower end of the support member (14) and carrying a lower lighting array (24), and a housing (20) attached to the support member and carrying the camera (52), wherein the upper and lower lighting arrays (22, 44) are configured to illuminate, from above and from below, a target region inside a field of view of the camera (52).

A system for external fish parasite monitoring in aquaculture, the system comprising: —a camera (52) suitable to be submerged in a sea pen suitable for containing fish, the camera being arranged for capturing images of the fish; and —an electronic image processing system (86) configured for identifying external fish parasites on the fish by analyzing the captured images, characterized by a camera and lighting rig (10) having a vertical support member (14), an upper boom (16) articulated to a top end of the support member (14) and carrying an upper lighting array (22), a lower boom (18) articulated to a lower end of the support member (14) and carrying a lower lighting array (24), and a housing (20) attached to the support member and carrying the camera (52), wherein the upper and lower lighting arrays (22, 44) are configured to illuminate, from above and from below, a target region inside a field of view of the camera (52).

A luminaire adapted to apply an auto-gradient effect across pixels has an interface coupled by a connection to a controller. The controller has electronic circuitry that receives a predetermined start light parameter for a start pixel of a luminaire and receives a predetermined end light parameter for an end pixel of the first luminaire, the predetermined end light parameter greater than the predetermined start light parameter. The controller circuitry then automatically interpolates a gradient effect for a middle light parameter of each of a plurality of middle pixels of the luminaire based on the start and end predetermined light parameters. The controller circuitry then outputs control signals having the start, end and middle light parameters to the start, end and middle light pixels, respectively, through the connection and to the interface.

A luminaire adapted to apply an auto-gradient effect across pixels has an interface coupled by a connection to a controller. The controller has electronic circuitry that receives a predetermined start light parameter for a start pixel of a luminaire and receives a predetermined end light parameter for an end pixel of the first luminaire, the predetermined end light parameter greater than the predetermined start light parameter. The controller circuitry then automatically interpolates a gradient effect for a middle light parameter of each of a plurality of middle pixels of the luminaire based on the start and end predetermined light parameters. The controller circuitry then outputs control signals having the start, end and middle light parameters to the start, end and middle light pixels, respectively, through the connection and to the interface.

A lighting device with an annular rectangular light that connects to the camera assembly by mechanical linkages. The annular rectangular light can connect to different components of a camera. The annular rectangular light can connect to a matte box or rods of the camera in some embodiments. The mechanical linkages allow positioning of the annular rectangular light such that it surrounds the front of a lens of the camera but does not obstruct a field of view of the lens.

An oral imaging device includes a base, a camera module, and a plurality of light source modules. The base includes a camera component, an opening surface, and a plurality of light source components connected to two sides of the camera component. A slant angle exists between each light source component and the camera component. The slant angle is a non-right angle. The opening surface is substantially parallel to the camera component. The camera module is located on the camera component and faces the opening surface. The plurality of light source modules each are located on each light source component and configured to project a light beam onto the opening surface. A center ray of the light beam passes through a center point of the opening surface.

An oral imaging device includes a base, a camera module, and a plurality of light source modules. The base includes a camera component, an opening surface, and a plurality of light source components connected to two sides of the camera component. A slant angle exists between each light source component and the camera component. The slant angle is a non-right angle. The opening surface is substantially parallel to the camera component. The camera module is located on the camera component and faces the opening surface. The plurality of light source modules each are located on each light source component and configured to project a light beam onto the opening surface. A center ray of the light beam passes through a center point of the opening surface.