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Exposure adjusting method of two-dimensional decoder

An adjustment method and decoder technology, which is applied in the field of exposure adjustment of two-dimensional decoders, can solve problems such as long adjustment time, high requirements, and insufficient brightness of pictures, and achieve the effect of convenient operation

Inactive Publication Date: 2019-08-27
苏州摩比信通智能系统有限公司
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Problems solved by technology

[0002] The key to 2D image decoding is to obtain a well-exposed picture, and the 2D decoders currently used in mobile terminals generally use fixed exposure and the automatic exposure that comes with the image sensor. Among them, the use of fixed exposure requires external ambient light High, suitable for the small distance between the lighting and the barcode, it is very easy to have insufficient brightness and overexposure of the picture; using the automatic exposure mode that comes with the sensor, although the sensor can automatically adjust the exposure time to obtain a picture with appropriate brightness, the adjustment speed is slow , especially the change of ambient light and the switch action of auxiliary lighting will cause the adjustment time to be too long, and the brightness of the obtained picture may not be the most suitable

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  • Exposure adjusting method of two-dimensional decoder

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Embodiment Construction

[0016] In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

[0017] Please refer to figure 1 , the exposure adjustment method of the two-dimensional decoder of the present invention, comprises the following steps:

[0018] S1. Turn off the automatic exposure function of the image sensor, set the exposure time t0 of the first frame and the optimal gray value E0 for decoding according to experience, and write the exposure time t0 of the first frame into the exposure register;

[0019] S2. Obtain the current image with fixed exposure, and the exposure time is the first frame exposure time t0;

[0020] S3. Decoding the current image,

[0021] If the decoding is successful, output the decoding result and end;

[0022] If the decoding is unsuccessful, the image gray value E is calculated, the exposure time t is obtained from the e...

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Abstract

The invention discloses an exposure adjusting method of a two-dimensional decoder. An optimal gray value is preset as a reference, and the exposure time of the next frame of image is adjusted according to the gray value of the current image, the optimal gray value and the exposure time of the current image until the image is decoded successfully, so that the method is suitable for various light conditions, and meanwhile, the suitable bar code distance range is large. A user can adjust the optimal gray value and the first frame exposure time according to actual use conditions to achieve the optimal decoding effect, operation is convenient, and practicability and effectiveness are achieved.

Description

technical field [0001] The invention relates to the field of mobile terminal two-dimensional image decoding exposure technology, in particular to an exposure adjustment method for a two-dimensional decoder. Background technique [0002] The key to 2D image decoding is to obtain a well-exposed picture, and the 2D decoders currently used in mobile terminals generally use fixed exposure and the automatic exposure that comes with the image sensor. Among them, the use of fixed exposure requires external ambient light High, suitable for the small distance between the lighting and the barcode, it is very easy to have insufficient brightness and overexposure of the picture; using the automatic exposure mode that comes with the sensor, although the sensor can automatically adjust the exposure time to obtain a picture with appropriate brightness, the adjustment speed is slow , especially the change of ambient light and the switch action of auxiliary lighting will cause the adjustment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/44H04N5/235
CPCH04N19/44H04N23/73
Inventor 史明星殷剑张建
Owner 苏州摩比信通智能系统有限公司
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