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Device and method for processing digital images captured by a binary image sensor

A digital image, binary technology, applied in image communication, image coding, image data processing, etc., can solve the problem of infeasibility of binary image data storage and processing

Active Publication Date: 2015-02-11
NOKIA TECH OY
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting image data may even be so large that storage and processing of binary image data in a digital camera or even in a desktop computer becomes infeasible

Method used

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  • Device and method for processing digital images captured by a binary image sensor
  • Device and method for processing digital images captured by a binary image sensor
  • Device and method for processing digital images captured by a binary image sensor

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Embodiment Construction

[0034] refer to figure 1 , the imaging device 500 may include imaging optics 10 and an image sensor 100 for capturing a binary digital input image IMG 1 of an object. Apparatus 500 may also be referred to as an "apparatus."

[0035] The device 500 may comprise a signal processing unit 200 for generating one or more parameter arrays DM1 , MM1 , NM1 based on an input image IMG1 provided by the image sensor 100 . The generation of this parameter array may be referred to as the encoding phase.

[0036] In one embodiment, the signal processing unit 200 may be arranged to provide a set of parameter arrays comprising density information D(i,j) and distribution information m(i,j), n(i,j).

[0037] The imaging device 500 may comprise a decoder 300 arranged to provide an output image IMG2 based on the density information and based on the distribution information. Generating the output image IMG2 from density information and distribution information may be referred to as a decoding st...

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Abstract

A method for processing image data comprises determining a set of parameters based on a binary digital image) such that said set of parameters comprises information about the density of white and / or black pixels of a first group of pixels of said binary digital image), and information about the density of white and / or black pixels of a second group of pixels of said binary digital image.

Description

technical field [0001] The present invention relates to processing digital images. Background technique [0002] Binary image sensors may include, for example, more than 10 9 individual photodetectors arranged in a two-dimensional array. Each individual photodetector has only two possible states: an unexposed "black" state and an exposed "white" state. Therefore, separate detectors do not reproduce different shades of gray. [0003] The size of the individual photodetectors of the binary image sensor may be smaller than the smallest size of the focal spot that can be provided by the imaging optics of the digital camera. Using this detector can help avoid color distortion problems due to color filter arrays, for example. [0004] However, storage and transmission of binary digital images like this may be difficult or impossible due to the huge data size. Several exposures and reads may be required to achieve a sufficient signal-to-noise ratio. The resulting image data m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T9/00H04N1/195H04N1/48H04N25/00
CPCH04N5/335H04N1/411H04N1/4072H04N25/00H04N1/4074
Inventor J·尼屈拉S·科斯基南T·里萨
Owner NOKIA TECH OY
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