35results about How to "Maximizing image quality" patented technology

An iris imaging system used for biometric identification provides a combined iris imager and wavefront sensor. The detector array allows for independent readout of different regions, such that a wavefront sensor region can be read out fast while allowing signal to integrate on the iris imaging region. Alternatively, the entire array may be used for wavefront sensing during an acquisition phase, and then at least a portion of the array may be switched to be used for iris imaging during a subsequent imaging phase. An optical periscope optionally allows various optics to be inserted in front of the combined iris imager and wavefront sensor. In another embodiment, the glint image of an on-axis or near on-axis illumination source is picked off at the image plane and directed to the wavefront sensor optics, while allowing all of the light from the iris field to pass through to the iris imaging camera.

A method of providing active illumination during biometry that utilizes pulsed lighting synchronized to frame acquisition. Two distinct illumination modalities are provided: the first maximizes the quality of images captured by the imaging system, and the second minimizes the overall illumination perceived by the user in combination with the first. The two modalities are provided substantially simultaneously. The first modality always includes a set of pulses synchronized with frame acquisition. The second modality may be either a second set of pulses not synchronized with frame acquisition or constant background illumination. The two modalities may be generated by two separate sources of illumination or by the same single illumination source. Adding the second modality to the first reduces user discomfort and the chances of an epileptic response as compared to using the first modality alone. The two modalities may have different wavelengths, pulse durations, or intensities.

A method and system reconstructs a contone image from a binary image by first tagging pixels to identify one of a multiplicity of image content types. The tag information and the pattern of bits surrounding the pixel to be converted to a contone value are used to reconstruct a contone image from a binary image. The pattern of bits in the neighborhood is used to generate a unique identifier. The unique identifier is used as the address for a lookup table with the contone value to be used. A filter also generates a contone value. A selector selects between the look-up table contone value and the filter contone value based an image context type.

In telecommunication video calling and videoconferencing systems, it is strongly desirable for remote observers to interact with natural gaze cues. In natural gaze interaction, the camera for a source observer appears to be co-located in the eye region of a destination observer image and vice versa. The appearance of camera co-location is achieved for stereoscopic camera pair that are placed either side of an autostereoscopic 3D display. Such cameras typically provide stereoscopic images that have disparity distributions that provide unnatural perceived head roundness. The present embodiments achieve perceived head roundness that is closer to that expected in natural face to face interaction by modification of perceived local depth in detected regions of the head.

In recording projection images for dual absorptiometry, the optical thickness of an object being examined is determined on the basis of a projection image recorded in a high-energy range, and parameters for recording a projection image in the low-energy range are selected as a function of the determined optical thickness. The ratio between image quality and the radiation dosage of the object being examined can be optimized thereby.

One aspect of the invention is a system for displaying images. A display device comprises a back light unit and a first aperture and a second aperture in the back light unit. The display device also comprises a first sensor, a second sensor, and a third sensor. The first sensor is configured to measure a first brightness value of the back light unit through the first aperture. The second sensor is configured to measure a second brightness value of the back light unit through the second aperture. The third sensor is configured to measure a third brightness value from a front portion of the display device.

The invention provides methods and systems for generating an ultrasound image. In a method, the generation of an ultrasound image comprises: obtaining channel data, the channel data defining a set of imaged points; for each imaged point: isolating the channel data; performing a spatial spectral estimation on the isolated channel data; and selectively attenuating the spatial spectral estimation channel data, thereby generating filtered channel data; and summing the filtered channel data, thereby forming a filtered ultrasound image. In some examples, the method comprises aperture extrapolation. The aperture extrapolation improves the lateral resolution of the ultrasound image. In other examples, the method comprises transmit extrapolation. The transmit extrapolation improves the contrast of the image. In addition, the transmit extrapolation improves the frame rate and reduces the motion artifacts in the ultrasound image. In further examples, the aperture and transmit extrapolations may be combined.

The present invention relates to an apparatus and method of a real-time, monitoring and control feedback system for a 2-D spectrometer application, to correct for active optical axis pointing misalignments or jitter (i.e., tip, tilt), that result in degraded scientific image integrity, unwanted spatial crosstalk and image blurring artifacts which severely limit the applications for high resolution spectrometer image data. The present invention provides a unique system architecture which ensures the most direct optical axis motion detection and control capability that will enable sub-pixel image motion monitoring and boresight control stability, thus, maximizing the science image quality.

Provided is a color lighting control method including a lighting device having a plurality of lighting unit, the method including the steps of: (a) applying predetermined input voltages to the plurality of lighting units respectively and obtaining image data through the camera; (b) calculating an image histogram that is a distribution graph for displaying the number of pixels corresponding to each monochrome level intensity through the image data; (c) calculating a standard deviation of the image histogram; and (d) calculating an optimal input voltage value for each of the plurality of lighting units within an adjustment range of the predetermined input voltages, wherein the optimal input voltage value maximizes the standard deviation.

An apparatus and method for obtaining data regarding toner refilled in an image forming apparatus, to achieve the highest printing quality using the refilled toner. The method includes checking whether the image forming apparatus has been refilled with toner; checking whether toner identification information is present, when the image forming apparatus has been refilled with toner; obtaining toner data using the toner identification information from outside the image forming apparatus, when the toner identification information is present; and determining the toner data in the image forming apparatus, when no toner identification information is present. Accordingly, when the image forming apparatus is refilled with better toner than the original, it is possible to improve the quality of printing by setting data regarding the refilled toner in the image forming apparatus.

A head-mounted display (HMD) system includes an optical arrangement; at least one moveable image panel, wherein the optical arrangement directs image light from the moveable image panel along a first optical pathway; a fixed image panel, wherein a portion of image light emitted from the fixed image panel is combined with image light of the at least one moveable image panel by the optical arrangement; and an adjustment mechanism that is configured to adjust an interpupillary distance (IPD) of the HMD system by moving the optical arrangement and the moveable image panel relative to the fixed image panel between a first position and a second position corresponding to different IPDs. The adjustment to the IPD maintains the first optical pathway. The HMD system further may include a sensing module that measures an adjustment position of the optical arrangement, and control electronics configured that determines the IPD based on the measured adjustment position, and updates image light emitted by the fixed image panel based on the IPD.

A container that will house components of the device will be mounted to railroad ties to permit the user of this device to gather high resolution images of the undercarriage of a moving train car as it passes overhead. The speed of the camera shutter will be dictated by the software that will work in conjunction with a linear speed device. The gathered images can be reassembled and forwarded to a remote location. The software provides an alarm in the event of a present danger.