Image capture device
AssigneeHoneywell International Inc.
InventorAndrei Cernasov
Life of this patent
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Abstract
A device and method for scanning an image of an object are disclosed. The device includes a controlled transparency film (5) and a set of light detectors (80). A backlight (50) may be used for scanning the object. The controlled transparency film is modulated to apply a series of filters on the backlight as it bounces off the object, back toward the detectors. The light detectors are sampled while each filter is being applied. The resultant measurements correspond to coefficients of a two-dimensional image transform. These coefficients may be collected as a bitstream to be inserted into an image file. This allows the image data to be compressed as it is being captured, thereby reducing processor overhead.
Claims19
A device for scanning an image of an object, comprising:
- a controlled transparency film configured to control the passage of light therethrough, wherein the controlled transparency film is modulated to apply a series of filters on the light passing therethrough;
- a plurality of light detectors configured to measure light passing through the controlled transparency film, wherein the light detectors are sampled in accordance with the application of the filters, such that the samples of measured light represent transform coefficients of the scanned image of the object and
- a backlight source configured to strobe in accordance with the sampling of the light detectors, wherein each backlight strobe passes through the controlled transparency film to the object being scanned, such that a reflection of the strobe by the object passes back through the controlled transparency film to be detected by the detectors.
A method for utilizing a controlled transparency film to scan an image of an object, comprising:
- logically partitioning the controlled transparency film into image blocks;
- modulating each image block of the controlled transparency film to apply a series of filters on light passing therethrough;
- measuring the filtered light passing through each image block such that a sample of the measured light is obtained for each applied filter, each sample representing a transform coefficient of the scanned image of the object, and
- strobing a backlight source in accordance with the sampling of measured light,
- wherein each backlight strobe passes through the controlled transparency film to the object being scanned, and a reflection of the strobe by the object is detected during each sampling interval.
Dependencies are inferred from the claim text.