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Infrared light image data processing device

A technology of image data and processing devices, applied in the direction of image communication, electrical components, etc., can solve problems such as image degradation and inability to eliminate output instability

Inactive Publication Date: 2012-06-13
WEIHAI HUALING OPTO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, the shading correction method in the current image data processing device can only eliminate the fixed dark output noise of the image sensor and the output deviation between pixels, and cannot eliminate the initial defect caused by the unstable output defect between the infrared light source and the photoelectric converter. Image Deterioration While Scanning

Method used

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  • Infrared light image data processing device
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  • Infrared light image data processing device

Examples

Experimental program
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Embodiment 1

[0034] Example 1: figure 1 It is a functional block diagram of Embodiment 1 of the present invention. In the figure, 1 is an image sensor capable of scanning images of originals, 2 is an analog-to-digital conversion circuit that converts analog signals into digital signals, 3 is the first memory for storing dark output correction coefficients, and 4 is dark output correction coefficients. The dark output signal correction circuit for output correction operation, 5 is the second memory for storing the bright output correction coefficient, 6 is the bright output signal correction circuit for bright output correction operation, and 7 is the first memory for storing the delay time Three memories, 8 is a delay output circuit for output delay, 9 is an output control circuit for adjusting the output data, 10 is an LED drive circuit for driving the internal light source of the image sensor 1, and 11 is for the entire data The control unit of the processing device for timing control ...

Embodiment 2

[0045] Embodiment 2: In the foregoing embodiments, the third memory storing the output delay time is an independent read-only memory. If the capacity permits, it can also be shared with other ROMs. In this embodiment, the bright output correction coefficient and the color adjustment coefficient share a ROM (second memory), such as Figure 6 shown. Wherein 57 is the memory that preserves bright output correction coefficient and output delay time simultaneously. Inside the memory, the output correction coefficient and the output delay time are respectively stored in different areas, which can be realized by ordinary technicians of the above-mentioned control device, and will not be described in detail here.

Embodiment 3

[0046] Embodiment 3: in the aforementioned embodiment, what the memory that preserves color adjustment coefficient used is read-only memory, also can use the random access memory supported by battery according to the difference of use occasion and environment, and above-mentioned control device is common It can be realized by technicians, so I won't go into details here.

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Abstract

The invention discloses an infrared light image data processing device with a data output delay function. The device comprises an image sensor, a luminescent source, an analog-to-digital conversion circuit, a first storage unit, a second storage unit and dark-output and bright-output signal correction circuits, wherein the luminescent source at least can send out infrared lights; the analog-to-digital conversion circuit can convert an electric signal output by a preface image sensor from an analog signal to a digital signal; the dark-output and bright-output signal correction circuits are used for reading storage values from the preface first storage unit and the second storage unit and correcting the signal value read by the actual original manuscript. The device provided by the invention is characterized by additionally arranging an output delay circuit and storage units for storing delayed time between the dark-output signal correction circuit and the bright-output signal correction circuit. The image data processing device can be used for eliminating the phenomenon of poor image quality caused by unstable infrared light signals at the beginning, and can be widely applied to the image processing fields in which the infrared light source is utilized to read and recognize images.

Description

technical field [0001] The invention relates to the technical field of image data processing, in particular to an infrared image data processing device using a contact image sensor or a line array image sensor such as a line array CCD as an image reading tool. Background technique [0002] We know that no matter what kind of image reading device, its own noise characteristics and inherent deviations will be superimposed on the actually read image data during the image reading process, which will distort the image data. To extract and use these data accurately, it is necessary to correct the data. The so-called correction is to eliminate the noise and deviation of the image reading device itself doped in the image data, so as to obtain the real actual image data. [0003] For linear image reading devices that read originals at close range, such as contact image sensors, linear CCDs, or linear CMOSs, the noise characteristics are represented by dark output values, and the dev...

Claims

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Application Information

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IPC IPC(8): H04N1/028H04N1/409
Inventor 戚务昌
Owner WEIHAI HUALING OPTO ELECTRONICS CO LTD