730results about How to "Correct distortion" patented technology

A self-contained interactive video display system. A projector projects a visual image onto a screen for displaying the visual image, wherein the projector projects the visual image onto a back side of the screen for presentation to a user on a front side of the screen. An illuminator illuminates an object near the front side of the screen. A camera detects interaction of an illuminated object with the visual image, wherein the screen is at least partially transparent to light detectable to the camera, allowing the camera to detect the illuminated object through the screen. A computer system directs the projector to change the visual image in response to the interaction.

A capturing unit captures and digitizes a printed image having an electronic watermark embedded therein and a lattice pattern image. A profile creation unit detects position deviations of intersections in the lattice pattern images captured at respective different zoom magnifications, generates correction information on distortion occurring in the images, and registers the correction information into a profile database in association with the zoom magnifications. An image correction unit selects correction information corresponding to a zoom magnification employed at the time of capturing of the printed image from the profile database, and corrects distortion occurring in the captured image of the printed image. An image area determination unit determines an original image area in the distortion-corrected captured image. A watermark extraction unit extracts watermark information from the original image area in the distortion-corrected captured image.

An interactive video window display system. A projector projects a visual image. A screen displays the visual image, wherein the projector projects the visual image onto a back side of the screen for presentation to a user on a front side of the screen, and wherein the screen is adjacent to a window. An illuminator illuminates an object on a front side of the window. A camera detects interaction of an illuminated object with the visual image, wherein the screen is at least partially transparent to light detectable by the camera, allowing the camera to detect the illuminated object through the screen. A computer system directs the projector to change the visual image in response to the interaction. The projector, the camera, the illuminator, and the computer system are located on the same side of the window.

An electronic endoscope includes an objective lens system in which chief rays directed toward the maximum image height are inclined outwardly with respect to the optical axis and a solid-state image sensor which has a light-receiving surface on which many pixels are arrayed and which provides a light beam inclined outwardly with respect to the optical axis and incident on the light-receiving surface with a higher power, in separating from the center of the light-receiving surface, than a light beam incident perpendicularly on the light-receiving surface. In doing so, distortion is favorably corrected and shading can be prevented.

The present invention provides an imaging lens assembly including, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with negative refractive power; a fourth lens element with positive refractive power having a convex object-side surface; a fifth lens element having a concave image-side surface, at least one inflection point being provided on the fifth lens element; and an aperture stop disposed between an imaged object and the third lens element. Such an arrangement of optical elements can effectively improve the image quality of the system and enable the imaging lens assembly to maintain a compact form. When the aperture stop is disposed near the object side, the telecentric feature is emphasized, resulting in a shorter total track length. When the aperture stop is disposed near the third lens element, the emphasis is on the wide field of view, and such an aperture stop placement helps to effectively reduce the sensitivity of the imaging lens assembly.

A self-contained interactive video display system. A projector projects a visual image onto a screen for displaying the visual image, wherein the projector projects the visual image onto a back side of the screen for presentation to a user on a front side of the screen. An illuminator illuminates an object near the front side of the screen. A camera detects interaction of an illuminated object with the visual image, wherein the screen is at least partially transparent to light detectable to the camera, allowing the camera to detect the illuminated object through the screen. A computer system directs the projector to change the visual image in response to the interaction.

This invention provides an imaging lens system including, in order from an object side to an image side: a first lens with positive refractive power having a convex object-side surface; a second lens with negative refractive power; a third lens having a concave image-side surface; a fourth lens with positive refractive power; a fifth lens with negative refractive power having a concave image-side surface, at least one surface thereof having at least one inflection point; and an aperture stop disposed between an imaged object and the third lens. The on-axis spacing between the first lens and second lens is T12, the focal length of the imaging lens system is f, and they satisfy the relation: 0.5<(T12 / f)×100<15.

A system and method for capturing and presenting immersive video presentations is described. A variety of different implementations are disclosed including multiple stream pay-per-view, sporting event coverage and 3D image modeling from the immersive video presentations.

A handheld image projecting device that modifies a visible image being projected based upon the position, orientation, and shape of remote surfaces, remote objects like a user's hand making a gesture, and / or images projected by other image projecting devices. The handheld projecting device utilizes at least one illuminated position indicator for 3D depth sensing of remote surfaces and optically indicating the location of its projected visible image. In some embodiments, a handheld projecting device enables a plurality of projected visible images to interact, often combining the visible images, reducing image distortion on multi-planar surfaces, and creating life-like graphic effects for a uniquely interactive, multimedia experience.

A similar-image detecting part detects similar image regions similar to one another in a plurality of frame images captured by rolling shutter type exposure. A displacement-vector detecting part detects a displacement vector of each of the similar image regions with respect to a reference position in each of the plurality of frame images. An average calculating part calculates an average of displacement vectors in the plurality of frame images. A correcting part shifts a similar image region in one of the plurality of frame images such that the displacement vector of the similar image region becomes the average calculated by the average calculating part.

The invention relates to a system for processing image data corresponding a scene comprising an imaging device and an image reading instruction indicia. In accordance with the invention, image data corresponding to a scene comprising an image reading instruction indicia is processed in a manner that depends on features of the image reading instruction indicia. If the image reading instruction indicia is of a type whose size, scaling, orientation, and distortion can be determined, scaling, orientation, and distortion characteristics determined from the image reading instruction indicia can be used to improve the image reading process.

The invention discloses a seven-piece optical lens for capturing image and a seven-piece optical system for capturing image. In order from an object side to an image side, the optical lens along the optical axis comprises a first lens with refractive power having a convex object-side surface; a second lens with refractive power, a third lens with refractive power; a fourth lens with refractive power; a fifth lens with refractive power, a sixth lens with refractive power, and a seventh lens with negative refractive power; and at least one of the image-side surface and object-side surface of each of the seven lens elements is aspheric. The optical lens can increase the aperture value and improve the imagining quality for use in compact cameras.

A motion video camera that removes the need for mechanical pan, tilt, and zoom apparatus is disclosed. The video camera includes the following. A wide-angle optical system is configured to receive an optical image. An image sensor is coupled to the optical system and is configured to convert the optical image to an electronic image. An image processing circuit is coupled to the image sensor and is configured to receive the electronic image and to execute movement and zoom operations by correcting distortions in the electronic image introduced by the wide-angle optical system and image sensor.

The object is to obtain undistorted images in high speed using a small amount of memory capacity, to realize high-quality characteristic information verification. The apparatus, which obtains information needed for user verification from partial images that are successively captured by a sweep-type fingerprint sensor from a fingertip, includes image obtaining means which captures successive partial images of biometric information; characteristic extracting means which obtains, from the captured partial images, characteristics and positions of the characteristics; detecting means which detects relative position information of partial images based on characteristics contained in a region in which the partial images overlap; and correcting means which calculates the amount of distortion of the characteristics based on the detected relative position information and on the positions of the characteristics in each partial image, and which corrects the positions of the characteristics in each individual partial image based on the calculated distortion amount.

A head-mounted display device captures an image of a real space as an external video through a circular fish-eye lens. A main image is extracted from a central portion of the external video, and a left image, a right image, an upper image, and a lower image are extracted as sub-images from the periphery of the external video. The distortion of a wide-angle lens is corrected in the main image, and the main image is displayed at the center. Each sub-image is displayed around the main image.

The invention relates to a method for two- or three-dimensionally visualizing a body volume, wherein a data set whose data values represent said body volume is displayed two- or three-dimensionally on a display, in which method a synthesized data set is computed from at least two selected diagnostic data sets which are not identical and have a predefined spatial allocation or relationship with respect to each other, wherein each of the data values of said synthesized data set is computed as a mathematical function of at least one data value of each selected data set, and said synthesized data set is displayed on the display unit. The two- or three-dimensional visualization of said synthesized data set may comprise more various items of image information than a selected data set and may thus be more informative and more accurate in detail. The invention also relates to a computer program product, and to a system for implementing said method.

There is now provided a method for determining vision defects and for collecting data for correcting vision defects of the eye. The method comprises projecting an image into the eye of the patient with an adaptive optical system having adaptive optical elements. The optical characteristics of the optical elements can be individually changed by an electrical signal. The presence of distortions of the image as perceived by the patient is determined by interaction of the patient with the examiner. By way of an electronic control system the optical characteristics of the adaptive optical elements are changed through outputting of an electrical signal to obtain a modified image with minimized distortions in the eye of the patient. The optical characteristics of the adaptive optical elements, as modified, are determined and vision correcting data for the eye being examined are computed from the optical characteristics of the adaptive optical elements, as modified. The method not only takes into consideration the aberrations of the optical imaging system but also the properties of reception and signal processing in the human brain. The method is further characterized in that the correction data for the aberrations of the human eye that impair the vision can be obtained by a measuring method that is actively physiologically evaluated beforehand. There is also provided an apparatus for determining vision defects and for collecting data for correcting vision defects.

An imaging lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element. The first lens element with negative refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof. The second lens element has an object-side surface being concave in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof. The third lens element has an object-side surface being convex in a paraxial region thereof. The fourth lens element has negative refractive power. The fifth lens element has positive refractive power. The sixth lens element has an image-side surface being concave in a paraxial region thereof.

For finding an inclination of an image rapidly and correctly, an image processing device includes a CCD picking up an image, an edge detection unit detecting an edge of an image relating to the picked-up image, a rotation unit rotating the detected edge in an image plane, an operation unit deriving a characteristic amount of rotated edge and an inclination detection unit detecting an inclination of the picked-up image based on the derived characteristic amount.

An image processing device (10) includes: a line segment extracting section (14) for generating a line segment image obtained by extracting contour line segments contained in a contour of a subject in a captured image; a candidate quadrilateral calculating section (15) for (i) putting at least one virtual line segment in the line segment image (ii) selecting four line segments from a set containing the at least one virtual line segment and the contour line segments, and (iii) identifying a quadrilateral defined by four straight lines containing respective selected four line segments; and an image correcting section (17) for correcting a distortion in perspective transformation of the captured image based on the quadrilateral identified by the candidate quadrilateral calculating section (15). With the configuration, the distortion of the subject can be corrected without manually adjusting a degree of correction, even in a case where the subject having sides is partially not contained in the captured image or the subject is not a document image.

A method and a system for processing a semiconductor device intended to improve the overlay accuracy of a semiconductor device product, particularly in its device area, in carrying out the mix-and-match exposure process are designed to calculate the difference of exposure distortions between two layers in the device area and the difference of exposure distortions between the two layers at the overlay measurement mark position from data of exposure field distortions of two exposure tools used for the mix-and-match exposure process and data of device area and overlay measurement mark position of the product, calculate a modification value which relates both differences to each other, calculate a first exposure condition correction value from the measurement result of overlay, and carry out the exposure process based on a second exposure condition correction value which is evaluated by modifying the first exposure condition correction value with the modification value.

A projection set of geodesic lines which are parallel with each other on a curved surface of a paper face is extracted from an image in which a paper face has been imaged by an image-pickup device, using the paper face contents as a clue; and also a projection set of ruling lines which form a ruled surface corresponding to the curved surface of the paper face is extracted from the projection set of geodesic lines. Then, the curved surface of the paper face is estimated from the projection set of the geodesic lines and ruling lines, and distortion of the image is corrected based on this curved surface of the paper face. If this is done, correspondence with various types of diverse distortions becomes possible, and distortion correction can be performed even when only one part of the paper face appears in the image.

A digital camera includes a distortion correction section, which is composed of a focal length determining section, a distortion evaluation section and a correction amount calculating section. The focal length determining section evaluates a focal length at the time of image capture. Based on the focal length, the distortion evaluation section evaluates the magnitude of wide-angle distortion and optical distortion in a captured image. Based on this evaluation, the distortion correction section selects an appropriate coefficient from an optical distortion correction coefficient table or a wide-angle distortion correction coefficient table. Using the selected coefficient, the correction amount calculating section applies a coordinate transform processing to cause positive or negative distortion to the captured image, and corrects the wide-angle distortion or the optical distortion.

A system and method for the measurement of distances related to an object depicted in an image. One aspect including delivery of supplemental materials for fenestration and for constructing insulating materials for fenestration. A digital image containing a primary object dimension and a reference object dimension in substantially the same plane undergoes digital image processing to provide improved measurement capability. Information regarding a primary object is provided to an automated measurement process, design and manufacturing system to provide customized parts to end users. A digital image is obtained having an observable constraint dimension to which a customized part is to conform wherein the digital image contains a reference object having a reference dimension and a constraint dimension is calculated from the digital image based on a reference dimension. The custom part is designed and manufactured based on the calculated constraint dimension.

To provide an image processing system and the like which can correct a distortion of a projected image through only a single sensor, a projector has a calibration image information generating section which generates image information used to display a rectangular calibration image; an image projection section which projects the calibration image onto a projection target, based on the image information; a sensing section which senses a region including the projected calibration image plane and generates sensing information; a projection area information generating section which generates shortest-distance projection area information based on the sensing information in such a state that a distance between the projection section and the projection target is different from the distance in an actual operating condition, and generates actual projection area information based on the sensing information in the actual operating condition; and a correction information generating section which generates image distortion correction information, based on the shortest-distance projection area information and actual projection area information.

An intermediate telephoto lens system includes a positive front lens group, a variable-aperture diaphragm, and a positive rear lens group, in this order from the object.The positive front lens group includes a positive first lens element L1, a positive second lens element L2 and a negative third lens element L3, in this order from the object.The positive rear lens group includes cemented lens elements having a negative fourth lens element L4 and a positive fifth lens element L5, and a positive sixth lens element L6, in this order from the object.The intermediate telephoto lens system satisfies the following condition:2.0<f / f12<3.0   (1)whereinf designates the focal length of the entire intermediate telephoto lens system; andf12 designates the combined focal length of the positive first lens element L1 and the positive second lens element L2.

An image processing apparatus includes an zoom position acquiring section for acquiring a zoom position representing a lens position condition of the optical zoom mechanism on taking the inputted image, a zooming-direction decoding section for decompressing correction parameter associated with the zoom position, which is acquired by the zoom position acquiring section, according to a zoom compression parameter, into which a correction parameter for distortion correction corresponding to each lens position condition is compressed by utilizing zoom partitioning points at which lens position conditions of the optical zoom mechanism are sequentially partitioned into plural levels that are set between a wide-end and a tele-end and that include both ends, and an image correction section for correcting distortion of the inputted image according to the correction parameter decompressed by the zooming-direction decoding section.