An example disclosed herein analyzes a first scan of a first target scanned with a first scanner module of a scanner, analyzes second scan of a second target scanned with a second scanner module of the scanner, identifies a color difference greater than a threshold color difference between the first scan and the second scan, and adjusts color settings for the first scanner module to correct the color difference to less than the threshold color difference.

A three-dimensional object printer generates image data of an object being formed in the printer with a plurality of light sources and a plurality of optical sensor arrays. A controller receives the image data and identifies measurements of the object and of the features of the object. The controller compares the measurements to expected measurements and adds material or removes material from the object in response to the identified measurements being outside a predetermined range about the expected measurements.

A three-dimensional object printer generates image data of an object being formed in the printer with an optical sensor and identifies the heights of object features above a substrate on which the object is being formed. A controller operates one or more actuators to move the optical sensor at a plurality of distances above the object to generate image data of the object at a plurality of heights above the object. The controller identifies the distances of the features of the object with reference to the image data generated by the optical sensor and the focal length of the optical sensor.

A three-dimensional object printer generates image data of an object being formed in the printer with an optical sensor array and identifies the color of an upper surface of the object. The controller compares the identified color to a predetermined range about an expected color for the upper surface and operates ejectors to eject material of a color different than the identified color in response to the identified color being outside of the predetermined range.

An imaging apparatus comprising a chassis, a light source for directing light along a first optical axis segment of the light path, at least a first fold mirror supported within the light path for redirecting light along a second optical axis segment, the at least a first fold mirror having a top edge, a first elongated lead member supported by the chassis, the first elongated lead member forming at least a first substantially straight surface that extends substantially parallel to the second optical axis segment, a first drive mechanism supported by the chassis and extending alongside and spaced apart from the first lead member, an area sensor aligned for movement with a segment of the light path, wherein the first lead member and the first drive mechanism are located to first and second different sides of the second optical axis segment and wherein each of the first lead member and the first drive mechanism are located at a height below the top edge of the at least a first fold mirror.

A photoelectric conversion apparatus includes a semiconductor substrate having one principle surface including recessed portions, and insulation bodies in the recessed portions. The semiconductor substrate includes photoelectric conversion elements each of which includes a first semiconductor region of a first conductivity type, a second semiconductor region of a second conductivity type, and a third semiconductor region of the second conductivity type which has at least a portion disposed nearer to the principle surface relative to the second semiconductor region. The second semiconductor region has a polarity of signal charge. The second semiconductor region is in contact with the first and third semiconductor regions. Signal charge paths are disposed between the recessed portions in a cross section perpendicular to the principle surface. At least one of the second and third semiconductor regions is positioned in directions of at least two of the signal charge paths.

A three-dimensional object printer generates image data of an object being formed in the printer with an optical sensor array and identifies the color of an upper surface of the object. The controller compares the identified color to a predetermined range about an expected color for the upper surface and operates ejectors to eject material of a color different than the identified color in response to the identified color being outside of the predetermined range.

A three-dimensional object printer generates image data of an object being formed in the printer with an optical sensor and identifies the heights of object features above a substrate on which the object is being formed. A controller operates one or more actuators to move the optical sensor at a plurality of distances above the object to generate image data of the object at a plurality of heights above the object. The controller identifies the distances of the features of the object with reference to the image data generated by the optical sensor and the focal length of the optical sensor.

A three-dimensional object printer generates image data of an object being formed in the printer with a plurality of light sources and a plurality of optical sensor arrays. A controller receives the image data and identifies measurements of the object and of the features of the object. The controller compares the measurements to expected measurements and adds material or removes material from the object in response to the identified measurements being outside a predetermined range about the expected measurements.

There is provided a scanner that combines images read by a first sensor array and a second sensor array, in which the first sensor array and the second sensor array have read regions which are overlapped partially, and includes a combining section that deforms and combines an image in a region read in an overlapped manner in a main scanning direction in at least any one of a first read image read by the first sensor array and a second read image read by the second sensor array.