Abstract: Systems and methods for synchronization are provided. In some aspects, a method for synchronizing an image sensor is provided. The method includes receiving image data captured using an image sensor that is moving along a pathway, and assembling an image sensor trajectory using the image data. The method also includes receiving position data acquired along the pathway using a position sensor, wherein timestamps for the image data and position data are asynchronous, and assembling a position sensor trajectory using the position data. The method further includes generating a spatial transformation that aligns the image sensor trajectory and position sensor trajectory, and synchronizing the image sensor based on the spatial transformation.

Abstract: Systems and methods for synchronization are provided. In some aspects, a method for synchronizing an image sensor is provided. The method includes receiving image data captured using an image sensor that is moving along a pathway, and assembling an image sensor trajectory using the image data. The method also includes receiving position data acquired along the pathway using a position sensor, wherein timestamps for the image data and position data are asynchronous, and assembling a position sensor trajectory using the position data. The method further includes generating a spatial transformation that aligns the image sensor trajectory and position sensor trajectory, and synchronizing the image sensor based on the spatial transformation.

Abstract: An apparatus and/or method includes localization of a mobile device. The localization technique is calibrated by prompting the mobile device for a collection of static position images for an image-based localization service, sending static position images to the image-based localization service, receiving, for the static position images, a plurality of localization values from the image-based localization service, calculating a correction for the plurality of localization values, and providing a location for the mobile device based on the correction for the plurality of localization values.

Abstract: An apparatus and/or method includes localization of a mobile device. The localization technique is calibrated by prompting the mobile device for a collection of static position images for an image-based localization service, sending static position images to the image-based localization service, receiving, for the static position images, a plurality of localization values from the image-based localization service, calculating a correction for the plurality of localization values, and providing a location for the mobile device based on the correction for the plurality of localization values.

Abstract: An apparatus includes at least one memory, a feature extractor, an image matcher, and a mapper. The memory stores images corresponding to a geographic area, and the images include image descriptors adaptable into a spatial relationship based on positional information. The feature extractor is configured to select a set of neighboring images from the images using a pairing factor. The image matcher is configured to calculate point matches based on the set of neighboring images and the positional information. The mapper is configured to construct a three-dimensional point cloud for at least a portion of the geographic area, from the point matches, using the image descriptors from the set of neighboring images.