Abstract: Provided are a biological information obtainment device, a biological information obtainment system, and a biological information obtainment method which accurately identify hemodynamic elements included in a hemodynamic signal. The present technique provides a biological information obtainment device including: a signal decomposition unit that decomposes a hemodynamic signal detected from an organism into a plurality of component signals; a periodicity calculation unit that calculates a periodicity of each of the plurality of component signals; and an identification unit that identifies a hemodynamic element based on the periodicity. The present technique also provides a biological information obtainment system and a biological information obtainment method.

Abstract: The present disclosure relates to a video projection control apparatus, a video projection control method, a program, and a video projection apparatus that enable a more effective countermeasure against a speckle noise. A calculating part calculates projection signal data to project video using a laser beam as a light source, from video signal data, a correcting part applies, to the projection signal data, a correction process of shifting a wavelength of the laser beam for, for example, each frame of the video for projection, and a converting part converts the projection signal data into a driving current supplied to the laser light source. In addition, the laser light source has a property that the wavelength shifts in accordance with an emission intensity employed when the laser light is emitted. The present technique is applicable to, for example, a video projection apparatus that uses a laser beam as its light source.

Abstract: An object is to provide a technique for removing fluctuations caused by a change in posture of a target from which a blood flow velocity is acquired when measuring the blood flow velocity. The present technology provides a biological information acquisition device including: a blood flow velocity measurement unit that is installed on a head; a detection unit that detects a position change amount of the blood flow velocity measurement unit, a moving velocity of the blood flow velocity measurement unit, or the position change amount and the moving velocity of the blood flow velocity measurement unit; a correction information generation unit that generates correction information of a blood flow velocity on the basis of the position change amount, the moving velocity, or the position change amount and the moving velocity; and a correction unit that corrects the blood flow velocity measured by the blood flow velocity measurement unit using the correction information.

Abstract: The present disclosure relates to a video projection control apparatus, a video projection control method, a program, and a video projection apparatus that enable a more effective countermeasure against a speckle noise. A calculating part calculates projection signal data to project video using a laser beam as a light source, from video signal data, a correcting part applies, to the projection signal data, a correction process of shifting a wavelength of the laser beam for, for example, each frame of the video for projection, and a converting part converts the projection signal data into a driving current supplied to the laser light source. In addition, the laser light source has a property that the wavelength shifts in accordance with an emission intensity employed when the laser light is emitted. The present technique is applicable to, for example, a video projection apparatus that uses a laser beam as its light source.