Abstract: Methods, image sensor (331; 631; 800), imaging system (605) for 3D imaging based on light triangulation comprising the image sensor, relating to provision of pixel values of image sensor pixels of a second Region Of Interest, ROI, (465; 465?; 565) based on a first ROI (365; 365?). The first ROI (365; 365?) used by the image sensor (331; 631; 800) to provide first pixel values of image sensor pixels of the first ROI (365; 365?) resulting from a first exposure. The second ROI (465; 465?; 565) is determined (702) according to a predetermined relation that the second ROI (465; 465?; 565) shall have to the first ROI (365; 365?). A second exposure (703) makes at least the image sensor pixels of the second ROI (465; 465?; 565) to attain second pixel values. The second ROI (465; 465?; 565) is used to provide (704) second pixel values of image sensor pixels of the second ROI (465; 465?; 565) for further processing by the image sensor (331; 631; 800).

Abstract: Method and arrangements for forming image data for use in 3D imaging of an object (520). The image data being from an imaging system (505) based on light triangulation and that provides one or more illuminations (511) in one or more light planes that geometrically correspond to the same plane or parallel planes. The imaging system (505) and camera(s) (530) thereof are configured to image object points of the object (520) at least twice, according to a first imaging and second imaging, during illumination of the object points by said illumination(s). The first imaging and second imaging differing in how specular reflections caused by said illumination(s) are being imaged. First and second image data from the first and second imaging are obtained, corresponding first and second profile images (670) with common mapping to real world coordinates for intensity peaks (682, 683) caused by direct reflections from the object (520).

Abstract: Image sensor (331; 431; 531?) for use in a camera (330; 530) of an imaging system (305) for three-dimensional imaging of an object (320) based on light triangulation, the camera (330; 530) and the imaging system (305). The image sensor (331; 431, 531?) comprising an image sensing area (333; 433; 533) that comprises rows (438) and columns (435) of pixel elements configured to sense light. An asymmetrically light diffusing layer (337; 437; 537) covers the image sensing area (333; 433; 533) so that incident light towards the image sensing area (333; 433; 533) will pass through and be spread by the asymmetrically light diffusing layer (337; 437; 537). Said light asymmetrically diffusing layer (337; 437; 537) is configured to spread light in a high diffusion direction and in a low diffusion direction that is orthogonal to the high diffusion direction.

Abstract: Image sensor (331; 531; 531?) for use with a lens (340; 540?) arranged to focus light onto an image sensing area (333; 533) of said image sensor (331; 531). Camera (330; 530?; 730) comprising the image sensor (331; 531; 531?) and said lens (340; 540?). Imaging system (305; 705; 730) for three-dimensional imaging of an object (320; 720) based on light triangulation, comprising the camera. The image sensor (331; 531) comprising an optical plate (337; 537) arranged to cover the image sensing area (333; 533) by at least two optical plate portions (334-1, 334-2; 534-1, 534-2) with different refractive properties such that light incident from said lens (340; 540?) and refracted by said optical plate portions (334-1, 334-2; 534-1, 534-2) towards and onto the image sensing area (333; 533) will travel different distances to be in focus on the image sensing area depending on which of said optical plate portions (334-1, 334-2; 534-1, 534-2) the light was refracted by.

Abstract: Method and device(s) for determining a transform having a de-skewing effect on 3D image data resulting from scanning by a 3D imaging system. 3D image data is obtained from scanning by the 3D imaging system (605) of planar real surfaces that at least during the scanning were non-parallel with constant one or more angular relationships between each other, whereby said 3D image data comprises planar imaged surfaces corresponding to said planar real surfaces. The planar imaged surfaces are detected in the 3D image data. The transform is determined based on the detected planar imaged surfaces and said one or more angular relationships between the planar real surfaces, such that the transform, when applied to a description of the detected imaged surfaces in coordinates of said 3D data, results in that angular relationships between the detected imaged surfaces match said angular relationships between the planar real surfaces.

Abstract: Method and arrangements for inspection of a drinking straw (101; 201) involving use of the drinking straw (101; 201) as a light guide for inspection of a sidewall (102; 202) of the drinking straw (101; 201) based on light leakage of guided light out from the drinking straw (101; 201) via the sidewall (102), such a through a damage (204) in the sidewall (102). It is illuminated (601), by means of one or more light sources (123), a first portion (131) of the drinking straw (101; 201) so that at least some of the light (127) on the first portion (131) is transmitted through a sidewall (102; 202) of the drinking straw (101; 201) into the drinking straw (101), and is guided therein. It is provided (602) one or more digital images (241) imaging another, second, portion (133; 233) of the drinking straw (101; 201) during said illumination.

Abstract: Method and arrangements for forming image data for use in 3D imaging of an object (520). The image data being from an imaging system (505) based on light triangulation and that provides one or more illuminations (511) in one or more light planes that geometrically correspond to the same plane or parallel planes. The imaging system (505) and camera(s) (530) thereof are configured to image object points of the object (520) at least twice, according to a first imaging and second imaging, during illumination of the object points by said illumination(s). The first imaging and second imaging differing in how specular reflections caused by said illumination(s) are being imaged. First and second image data from the first and second imaging are obtained, corresponding first and second profile images (670) with common mapping to real world coordinates for intensity peaks (682, 683) caused by direct reflections from the object (520).

Abstract: The present invention relates to an optical sensor for the detection of at least one height profile of an object surface in accordance with the principle of light sectioning method. The optical sensor comprises a light transmitter which is configured to project at least one light line onto the object surface, a receiving unit comprising a light receiver having an array of receiving elements and a receiving optics arranged upstream of the light receiver for generating an image of the at least one projected light onto the light receiver, and an evaluation unit connected to the light receiver and configured for determining the height profile from an image of the at least one projected light line recorded by the light receiver.

Abstract: A camera for recording 3D image data using a light sectioning process is provided that has an illumination unit to project a light pattern in a focal plane, an image sensor having a plurality of light reception elements in an image plane, a reception optics upstream of the image sensor and having an objective plane, and a control and evaluation unit that is configured to generate the 3D image data by evaluating the light pattern in a recording of the image sensor, wherein the image plane is tilted with respect to the focal plane. In this respect, the reception optics has at least one metaelement here that compensates an oblique light incidence on the light reception elements.

Abstract: Imaging system for three dimensional imaging based on light triangulation and method for supporting reduction of distortions in three dimensional imaging based on light triangulation. The imaging system comprises a camera and a light source configured to provide an illumination of the object comprising structured light. The structured light intersecting a virtual volume comprising the object and that corresponds to a volume where one or more objects, including said object, that the imaging system is configured to image are present during the imaging. At least during said imaging by the camera it is prevented stray light from the light source to reach the virtual volume within field of view of the camera. In the imaging system this is accomplished by a light shield arranged outside the structured light between the light source and said virtual volume.

Abstract: Method and arrangements for associating multispectral 2D image data with 3D image data generated from light triangulation performed by an imaging system (500) for 3D imaging of an object (520). The imaging system (500) comprises one or more second light sources (550) for illuminating the object (520) with two or more second lights (551) that are multispectral by differing from each other by comprising different light wavelengths. Said 3D image data is obtained (601) as first sensor positions, “SP1s”, (571) of IM1s (541) that correspond to locations of intensity peaks of reflected first light from the object (520) as part of said light triangulation. Two or more second images, “IM2s”, (742) are obtained (602) and are imaging the object during illumination by said two or more second lights (551), respectively. In respective IM2 (542), for and in relation to respective SP1 (571), it is selected (603) respective second sensor position, “SP2”, (572).

Abstract: Method and arrangements for obtaining and associating 2D image data with 3D image data are provided. the image data being based on light triangulation, performed by an imaging system, where a measure object with first light and an image sensor senses reflected first light from a measure object, during a first exposure period resulting in a first image with first intensity peaks occurring at first sensor positions, SP1. The measure object is also illuminated with second light(s) and any reflected second light is sensed from the measure object by the image sensor during third exposure period(s) resulting in one or more third images. For respective first sensor position, SP1, in the first image it is selected a respective third sensor position, SP3, in said one or more third images.

Abstract: Image sensor (331; 531; 531?) for use with a lens (340; 540?) arranged to focus light onto an image sensing area (333; 533) of said image sensor (331; 531). Camera (330; 530?; 730) comprising the image sensor (331; 531; 531?) and said lens (340; 540?). Imaging system (305; 705; 730) for three-dimensional imaging of an object (320; 720) based on light triangulation, comprising the camera. The image sensor (331; 531) comprising an optical plate (337; 537) arranged to cover the image sensing area (333; 533) by at least two optical plate portions (334-1, 334-2; 534-1, 534-2) with different refractive properties such that light incident from said lens (340; 540?) and refracted by said optical plate portions (334-1, 334-2; 534-1, 534-2) towards and onto the image sensing area (333; 533) will travel different distances to be in focus on the image sensing area depending on which of said optical plate portions (334-1, 334-2; 534-1, 534-2) the light was refracted by.

Abstract: Method and arrangements for obtaining and associating 2D image data with 3D image data are provided. the image data being based on light triangulation, performed by an imaging system, where a measure object with first light and an image sensor senses reflected first light from a measure object, during a first exposure period resulting in a first image with first intensity peaks occurring at first sensor positions, SP1. The measure object is also illuminated with second light(s) and any reflected second light is sensed from the measure object by the image sensor during third exposure period(s) resulting in one or more third images. For respective first sensor position, SP1, in the first image it is selected a respective third sensor position, SP3, in said one or more third images.

Abstract: Method and arrangements for inspection of a drinking straw (101; 201) involving use of the drinking straw (101; 201) as a light guide for inspection of a sidewall (102; 202) of the drinking straw (101; 201) based on light leakage of guided light out from the drinking straw (101; 201) via the sidewall (102), such a through a damage (204) in the sidewall (102). It is illuminated (601), by means of one or more light sources (123), a first portion (131) of the drinking straw (101; 201) so that at least some of the light (127) on the first portion (131) is transmitted through a sidewall (102; 202) of the drinking straw (101; 201) into the drinking straw (101), and is guided therein. It is provided (602) one or more digital images (241) imaging another, second, portion (133; 233) of the drinking straw (101; 201) during said illumination.

Abstract: System and sensor (10) for imaging characteristics of an object (2). The sensor comprises at least a first area (11) and a second area (12) of pixel elements arranged to absorb electromagnetic radiation from the object (2) and to convert the radiation absorbed into electrical charges. The first area (11) has a first degree of resolution and the second area (12) has a second degree of resolution different from the first degree of resolution and the first area (11) is arranged to image one type of characteristics and the second area (12) is arranged to image another type of characteristics.