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Method for correcting images obtained by an array of photosensitive points

A technology of photosensitive points and arrays, applied in image communication, parts of color TV, parts of TV system, etc., can solve problems such as loss or modification of medical information, difficulty in adapting to wide-spectrum electromagnetic interference, etc.

Active Publication Date: 2012-04-04
曲克赛尔股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, filtering may result in loss or modification of medical information
In addition, it is difficult to adapt to the wide spectrum of electromagnetic interference

Method used

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  • Method for correcting images obtained by an array of photosensitive points
  • Method for correcting images obtained by an array of photosensitive points
  • Method for correcting images obtained by an array of photosensitive points

Examples

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Embodiment Construction

[0021] figure 1 A simplified diagram is shown of a photosensitive device 1 comprising an array 2 arranged in a conventional manner. Array 2 includes photosensitive points P 1 to P 9 , each photosensitive point is formed by a photodiode Dp and a switching diode Dc mounted in series according to a head-to-tail configuration. array consists of column conductors with X 1 to X 3 Crossed Row Conductor Y 1 to Y 3 , photosensitive point P 1 to P 9 Connect to row conductor Y at each intersection 1 to Y 3 and column conductor X 1 to X 3 between. Therefore, the photosensitive point P 1 to P 9 line up L 1 to L 3 and column Cl 1 to Cl 3 . It is also called a pixel.

[0022] exist figure 1 In the example, it only shows the limit of nine photosensitive points P 1 to P 9 three rows and three columns, but such arrays can have much larger capacities, possibly up to millions of points. For example, it is common to construct arrays with photosensitive spots (in an area of ...

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Abstract

The invention relates to a method for correcting an image obtained by an array of photosensitive points. Said method is particularly useful when the array is subjected to electromagnetic interference. According to the invention, the correction method includes a first step (E2) of reading the array row by row. The signals read during a first reading of each row represent the charges built-up following an exposure of the array to a visible radiation, enabling the formation of a discrete signal X (n) for each column of the array. The signals read during a second reading represent the charges built-up in the absence of exposure and form a discrete signal OF(n) for each column of the array. In a second step (E3) of the method, a signal OFX(n) is determined, substantially corresponding to the signal OF(n) which was formed during the first reading in the absence of an exposure. In a third step (E4), the signal OFX(n) is subtracted column by column from the signal X (n).

Description

technical field [0001] The invention relates to a method for correcting an image obtained by a photosensitive device comprising an array of photosensitive dots, for example made by techniques used for depositing semiconductor materials. It is mainly applied to, but not limited to, photosensitive devices for detecting radiographic images. The invention is particularly useful when the photosensitive device is subject to electromagnetic interference. Background technique [0002] Techniques for depositing thin films of semiconductor material such as hydrogenated amorphous silicon (aSiH) on an insulating support such as glass can build arrays of photosensitive spots capable of producing images based on visible or near-visible radiation. However, these arrays can be used within the framework of radiographic image detection. For this purpose, it is sufficient to insert a scintillation screen between the X-ray radiation and the array in order to convert the X-ray radiation into o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/357H04N25/00
CPCH04N5/361H04N5/32H04N23/30H04N25/63
Inventor T·沃思B·坎迪亚德J-M·维尼奥勒
Owner 曲克赛尔股份有限公司
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