Hewlett-packard Development Company, L.p.

Choon Hwee Yap

Lian Chye Simon Tan

Kuek Peow Lai

John M Baron

Shyh Chije Leong

Boo Siong Lim

Phey Hong Soh

Ganlin Tang

Ai-Qiang Yang

Kuan Soon Oong

Tiang Kok Hun

A first zone and a second zone of a scan surface may be scanned by an image sensor. A lid may be coupled to the scan surface and have an open position and a closed position, the lid being to cover the first zone and the second zone when in the closed position. The position of a lid may be determined based on a comparison of a scan of the first zone and a scan of the second zone.

Lid position determinations based on scans of zones

Example implementations relate to streak compensation. Some examples may calibrate an initial gain for data from an optical element based on a scan of a first calibration target, obtain an image of a second calibration target from the optical element using the calibrated initial gain, and detect at least one streak in the image of the second calibration target. Some examples may also record data representing the at least one detected streak and may calibrate a final gain for the optical element based on the initial gain and the data representing the at least one detected streak.

Streak compensation

A scanner includes a scan surface, a scan, a controller, and a positioning system. The scan surface is stationary and has a first width while the scan module has a second width substantially less than the first width. The controller is configured to automatically cause two scans of a media on the scan surface, without repositioning the media, and to automatically produce a composite image of the entire media from the two scans. The positioning system is in communication with the controller and includes an identification mechanism configured to identify an edge of a scanning area associated with the scan surface and to stop a position of the scan module at the identified edge.

System and method for edge identification to position components of a scanner

A scanner comprises a first gear assembly on a frame, a stationary scan surface having a first width, and a scan module having a length substantially less than the first width. The scan module includes a second gear assembly configured to move the scan module, in a first orientation generally perpendicular to the first width, in a first scanning path relative to a first width portion of the scan surface and in a second, non-duplicative scanning path relative to a second width portion of the scan surface. The second gear assembly is releasably engageable to the first gear assembly to selectively shift the scan module, in a second orientation generally perpendicular to the first orientation, between the respective first and second scanning paths.

Scanner gear assembly

In a method for processing an image, a scene to be captured is divided into multiple zones and statistical values for a plurality of the multiple zones are obtained. In addition, a short-exposure time and a long-exposure time from the statistical values of the plurality of zones are determined. A long-exposure frame is captured at the long-exposure time and a short-exposure frame is captured at the short-exposure time. The long-exposure frame and the short-exposure frame are combined into a combined image while correcting for motion estimated to have occurred between the long-exposure frame and the short-exposure frame, and the combined image is stored.

Growing community of inventors

Singapore, Singapore

Choon Hwee Yap