35results about How to "Improve S/N" patented technology

An X-ray CT apparatus includes an X-ray radiation unit which applies a first X-ray having a first energy spectrum and a second X-ray having a second energy spectrum different from the first energy spectrum to a subject, an X-ray data acquisition unit which acquires first X-ray projection data of the subject based on the first X-ray and second X-ray projection data of the subject based on the second X-ray, and an image reconstruction unit which determines information about a difference between the first X-ray and the second X-ray with respect to an image of the subject, segments the image into at least two pixel areas based on the difference information, and sets part of the segmented pixel areas to a dual energy image obtained by a weighted subtraction process based on X-ray projection data having a plurality of energy spectrums.

A signal processing device is provided. The device includes an echo signal input unit for receiving echo signals resulted from transmission signals reflected on an object. The transmission signals are transmitted from a transmission source at transmission timings at predetermined time intervals, at least one of the transmission timings shifted from the other timings in time. The device includes a complex reception signal generator for generating complex reception signals, a phase calculator for calculating a phase change amount of the complex reception signals with respect to a reference phase, a phase corrector for phase-correcting the complex reception signals and outputting the corrected signals, and a Doppler processor for performing Doppler processing on the corrected signals and outputting the Doppler-processed signals as Doppler echo signals of the object.

In a method of controlling an image reading apparatus, which has an illumination unit adapted to irradiate an object with first and second light rays in different frequency ranges, and a light-receiving unit adapted to receive light coming from the object, and to output a signal, and reads an image of the object by moving the illumination unit and light-receiving unit relative to the object, the light-receiving unit outputs a first signal in response to irradiation with the first light ray, and outputs a second signal in response to irradiation with the second light ray. Upon reading image information for one line by the image reading apparatus, the second light ray is controlled to be sequentially turned on at a plurality of timings to sandwich the ON timing of the first light ray, and image signals for one line corresponding to the first and second light rays are obtained by averaging or adding respective pieces of image information obtained at the plurality of timings for each of the first and second signals.

A display is provided. The display includes at least one display cell having a display circuit; at least one light receiving cell including a light receiving element; a light emitting section operative to radiate light to the side of a display surface; and at least one transparent plate disposed on the front side in the display relative to a region in which the light emitting section is disposed and regions in which the display cell and the light receiving cell are formed, wherein an antireflection layer is formed on a most face-side surface of the display.

The invention provides a signal extraction method of an electromagnetic flowmeter, in order to improve S/N according to an excitation method with low powder consumption and perform signal processing with less output fluctuation. In an exciting current waveform (c), an excitation stop period is arranged between a positive excitation interval and a negative excitation interval. Sampling times T1 and T2 of the positive and negative excitation intervals and sampling time T0 of the excitation stop period are determined according to a timing signal (d), and the flow velocity and the flow rate are obtained from the times T1 and T2 and the difference between the electrode potentials extracted at the time T0. In addition to the electromotive force which is used as a flow rate signal, the electrode potentials sampled at times T0, T1, T2 include flow noise (e) superimposed on the electrode, and the electrode potential (f) which fluctuates slowly are also sampled. By obtaining the difference between the electrode potentials at the time T1, T2 and the preceding time T0 and obtaining the flow rate with a short sampling period, correct flow velocity and flow rate are obtained, and flow noise (e) and electrode potential fluctuation (f) cancel each other and can be effectively removed.

Specularly reflected light from a convergence position on an object surface 31 enters a second critical-angle prism 14, another prism 15, and a first critical-angle prism 13 of a parallel beam selection means 20 in this order as a parallel beam traveling along the optical axis. The critical-angle prisms 13, 14 have critical angles of 45 degrees with respect to the wavelength of the light beam. Light beams other than the parallel light beam are removed at oblique surfaces 13a, 14a of the critical-angle prisms 13, 14, thereby allowing only the parallel light beam to exit as a regular light beam. This parallel beam is formed into a convergent light by a collimator lens 12, reflected by a half prism 11 and converged on an image pickup surface of an image pickup device 52. In this way, unnecessary noise light can be removed without placing a pin hole plate such as that placed before the image pickup plane in a confocal microscope.

The invention provides an angular velocity detection circuit, an angular velocity detection device, an electronic apparatus, and a moving object. The angular velocity detection circuit includes: a first conversion unit that includes a first operational amplifier, and converts a first detection signal, which is output from a first detection electrode and is input to a first input terminal of the first operational amplifier, into a voltage; an angular velocity signal generation unit that generates an angular velocity signal on the basis of an output signal of the first conversion unit; and a first correction signal generation unit that generates a first correction signal for reducing an offset of the angular velocity signal which occurs due to a leakage signal included in the first detection signal on the basis of a signal based on drive oscillation of the angular velocity detection element. The first correction signal is input to the first input terminal or a second input terminal of the first operational amplifier directly or through a resistor.

A growth state measuring device for a crop in cultivation is provided, which can continuously measuring the nutritional state of the plant in a non-contact, non-destructive manner at a cultivation site such as open air or indoors with respect to the cultivated crop at the growth stage before harvesting. The growth state measuring device for the crop in the cultivation according to the present invention includes a light source (11), a light projection control unit (12), a light receiving unit (13), a light receiving control unit (14), and a calculation unit (15). The plant (1) is a crop in thecultivation stage before the harvesting. Measurement sites (1a), (1b), (1c) are any one of a stem, a fruit handle, and a petiole, and the living body holding structure is attached to a stem, a fruit handle or a petiole. In the calculation unit (15), the arithmetic processing is performed using the difference between a light-receiving signal, at the time of light projection, obtained by the detection light at the time of irradiation by the light source (11) and a light-receiving signal, while the light projection is not performed, obtained by the detection light before or after irradiation timing.