Disclosed is an image processing method employing a post processing technique that may eliminate flicker artifacts from captured video in real time. An example method involves receiving from an image sensor a sequence of input frames representing a scene and identifying and tracking a light source represented within the input frames. Flickering of the light source may be identified by detecting frame to frame color characteristic variation of a region representing the light source. A sequence of output frames may be generated with the flickering removed by selectively modifying image data of pixels within the region.

Disclosed is an image processing method employing a post processing technique that may eliminate flicker artifacts from captured video in real time. An example method involves receiving from an image sensor a sequence of input frames representing a scene and identifying and tracking a light source represented within the input frames. Flickering of the light source may be identified by detecting frame to frame color characteristic variation of a region representing the light source. A sequence of output frames may be generated with the flickering removed by selectively modifying image data of pixels within the region.

An optical communication-based image processing system is disclosed. The system may include a transmitter having at least one light emitting element and a receiver having a rolling shutter camera. As the system is provided, a rolling shutter effect may be improved.

There is provided a signal processing device, a signal processing method, and a detection sensor that enable detection of flicker information from an output indicating a luminance change. The signal processing device includes: a count unit that counts a first count number, which is a count number of pixels in which a first luminance change in a positive direction is detected, and a second count number, which is a count number of pixels in which a second luminance change in a negative direction is detected, in an image output from alight receiving unit at a predetermined frame rate and indicating a luminance change; a coefficient generation unit that generates a coefficient corresponding to a time at which the luminance change is detected; and an integrating unit that integrates a multiplication result of the count number of the pixels and the coefficient. The present technology can be applied to, for example, an event detection sensor or the like.

There is provided a signal processing device, a signal processing method, and a detection sensor that enable detection of flicker information from an output indicating a luminance change. The signal processing device includes: a count unit that counts a first count number, which is a count number of pixels in which a first luminance change in a positive direction is detected, and a second count number, which is a count number of pixels in which a second luminance change in a negative direction is detected, in an image output from alight receiving unit at a predetermined frame rate and indicating a luminance change; a coefficient generation unit that generates a coefficient corresponding to a time at which the luminance change is detected; and an integrating unit that integrates a multiplication result of the count number of the pixels and the coefficient. The present technology can be applied to, for example, an event detection sensor or the like.

Methods and systems are provided to generate metamerically matched illumination on a surgical site. The metamerically matched illumination may reduce or remove strobing effects associated with illumination devices during a surgery or surgical procedure. By metamerically matching illuminants in the illumination in combination with estimates of the human visual system, the illumination of the surgical site can visually appear to a user as a continuous white light, while maintaining distinct underlying spectra in the illumination. The light reflected by the surgical object may also be captured and metamerically matched, such that the reflected light appears as a single continuous color.

Methods and systems are provided to generate metamerically matched illumination on a surgical site. The metamerically matched illumination may reduce or remove strobing effects associated with illumination devices during a surgery or surgical procedure. By metamerically matching illuminants in the illumination in combination with estimates of the human visual system, the illumination of the surgical site can visually appear to a user as a continuous white light, while maintaining distinct underlying spectra in the illumination. The light reflected by the surgical object may also be captured and metamerically matched, such that the reflected light appears as a single continuous color.

Techniques and apparatuses are described for reducing a flicker effect of multiple light sources in an image captured with an imaging device. A lighting frequency associated with each of the multiple light sources is detected and prioritized relative to a flicker effect upon the image to identify at least a first-prioritized lighting frequency and a second-prioritized lighting frequency. A first exposure-time factorization set is determined for the first-prioritized lighting frequency, and a second exposure-time factorization set is determined for the second-prioritized lighting frequency. An exposure time of the imaging device is adjusted to an exposure time identified in the first exposure-time factorization set that matches, or aligns near-to-matching, an exposure time identified in the second exposure-time factorization set.

A flicker detection circuit is provided. The flicker detection circuit may include a flicker detection correlated double sampling (FD CDS) circuit including first to sixth switches turned on or off based on a control signal, and first to fourth capacitors, the FD CDS circuit being configured to receive a flicker pixel signal output from at least one pixel, summate with an output offset signal, and amplify the summation based on a gain to form a flicker detection signal; and an analog-to-digital converter (ADC) configured to quantize the flicker detection signal.

A method for enhancing media includes: receiving, by an electronic device, a media stream; performing, by the electronic device, an alignment of a plurality of frames of the media stream; correcting, by the electronic device, a brightness of the plurality of frames; selecting, by the electronic device, one of a first neural network, a second neural network, or a third neural network, by analyzing parameters of the plurality of frames having the corrected brightness, wherein the parameters include at least one of shot boundary detection and artificial light flickering; and generating, by the electronic device, an output media stream by processing the plurality of frames of the media stream using the selected one of the first neural network, the second neural network, or the third neural network.