Imaging device having light field image sensor

摘要

A method of imaging a target object with an imaging reader. The method includes the following: (1) detecting light from the target object through a lens arrangement with an image sensor to generate light-field data; (2) generating a stream of image data including image data representing an expected in-focus image of the target object, and (3) processing the expected in-focus image of the target object to decode a barcode on the target object. The image sensor includes an array of photosensitive elements and an array of microlenses that overlays the array of photosensitive elements located at a focus plane of the microlens.

主权项

1. A method of imaging a target object with an imaging reader, the method comprising:
detecting light from the target object through a lens arrangement with an image sensor to generate light-field data, wherein the image sensor comprises (1) an array of photosensitive elements and (2) an array of microlenses that overlays the array of photosensitive elements with a uniform spacing, wherein a microlens covers multiple photosensitive elements each receiving light through the microlens to function as a sub-pixel; generating a stream of image data including image data representing an expected in-focus image of the target object, a stream of image data being generated from the light-field data; selecting a set of predetermined focus planes each being titled with respect an optical axis of the lens arrangement; and constructing a set of images of the target object from the light-field data, wherein each image in the set of images is constructed from the light-field data using one of the predetermined focus planes as a corresponding focus plane.