CN103702036A - Wide-dynamic range decoding method - Google Patents
Wide-dynamic range decoding method Download PDFInfo
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- CN103702036A CN103702036A CN201310594230.0A CN201310594230A CN103702036A CN 103702036 A CN103702036 A CN 103702036A CN 201310594230 A CN201310594230 A CN 201310594230A CN 103702036 A CN103702036 A CN 103702036A
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- image
- dynamic range
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- imaging
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- 238000003384 imaging method Methods 0.000 claims abstract description 21
- 238000000034 methods Methods 0.000 claims abstract description 18
- 238000004904 shortening Methods 0.000 claims description 3
- 238000005286 illumination Methods 0.000 abstract description 3
- 230000001788 irregular Effects 0.000 abstract description 3
- 238000005516 engineering processes Methods 0.000 description 6
- 238000004364 calculation methods Methods 0.000 description 1
- 238000010586 diagrams Methods 0.000 description 1
- 230000004301 light adaptation Effects 0.000 description 1
Abstract
Description
Technical field
The present invention relates to automatic identification technology field, particularly a kind of bar code decoding method of high dynamic range.
Background technology
Automatic identification technology is of great significance for current informationalized social tool.In general, in an information system, the collection of data has identified the collecting work of the initial data of system automatically, the problems such as the speed that solved artificial data input is slow, the error rate is high, labour intensity is large, the simple repeatability height of work, for providing, computer information processing carries out quickly and accurately the effective means of data acquisition input, therefore, automatic identification technology, as a kind of revolutionary new and high technology, is accepted by people just rapidly.Automatic recognition system transfers data to background process computer by intermediate equipment (comprise software with hardware), by computer, collected data is processed or is processed, and finally forms people's Useful Information.The most frequently used equipment that automatically sets is bar code scan equipment at present.In current bar code scan equipment, because the contained amount of information of Quick Response Code is larger, it is widely used, and therefore, adopts the Quick Response Code fetch equipment of image decoding technology to be also widely used.In actual applications, the surrounding environment change of bar code scan equipment may be huge, such as from the very low environment of brightness to the very high environment of brightness, or even both combinations, in some cases, an object part to be decoded be under dark shade and another part under light.Adopting the image calculation method of the basic standard of discrete exposure setting to run into very large challenge to the bar code scan in these situations or imaging meeting even cannot successfully decoded.
Summary of the invention
The object of the present invention is to provide a kind of coding/decoding method of high dynamic range, it can adapt to complicated photoenvironment, realizes bar-code identification quickly and accurately.
For realizing object of the present invention, high dynamic range coding/decoding method of the present invention comprises the continuous imaging process of high dynamic range, continuous imaging process is exposed to the sun a little less than including each time, overexposure, and the imaging under normal exposure, then in the image after these exposures, top-quality part is integrated into the complete image that obtains comprising all image informations in an image by processor, then by processor, this image is decoded.
Preferably, a little less than described, expose to the sun by shortening lighting hours, reducing lighting current and/or reduce to gain to realize; Described overexposure is by extending lighting hours, improving lighting current and/or improve gain and realize.
Preferred again, the continuous imaging process of described high dynamic range activates after each unsuccessful scanning process.
Preferred again, the continuous imaging process of described high dynamic range can be enabled always.
The coding/decoding method of high dynamic range of the present invention also can successfully be applied when picture size is irregular compared with large and illumination condition; In addition, because two to three continuous images are acquired and are stitched together, the Downside Risk of dirty image can be lowered; The image attention district that only comprises bar code content having reduced in addition significantly reduces time that image is processed with this.
Accompanying drawing explanation
By the detailed description below in conjunction with accompanying drawing, the present invention is aforesaid will be become apparent with other object, feature and advantage.Wherein:
Figure 1 shows that the flow chart of steps of coding/decoding method of the high dynamic range of one embodiment of the invention;
Figure 2 shows that the flow chart of steps of coding/decoding method of the high dynamic range of another embodiment of the present invention.
Embodiment
As follows in conjunction with diagram detailed description feature of the present invention and advantage:
High dynamic range coding/decoding method of the present invention comprises continuous imaging process, imaging each time all occurs under different conditions of exposures, comprise ambient brightness that adaptation is brighter a little less than expose to the sun, the overexposure that adapts to darker ambient brightness, and the normal exposure of the predetermined luminance of intermediate degree, then the top-quality part of these exposure images is merged in an image by processor, it has shown the image detail of shade and highlighted part, and these details may be missed in normal single exposure process.
In the present embodiment, a little less than described, exposing to the sun can be by shortening lighting hours, reducing lighting current and/or reduce to gain to realize; Described overexposure can be by extending lighting hours, improving lighting current and/or improve gain and realize.
The flow chart of steps of the coding/decoding method of the high dynamic range of one embodiment of the invention as shown in Figure 1, the imaging process of described high dynamic range can activate after the scanning process of each unsuccessful predetermined normal brightness, as a last decoding, attempts step.
Shown in the flow chart of steps of another embodiment of the present invention as shown in Figure 2, the imaging process of described high dynamic range can be used always.This mode of operation is useful under some special imaging applications environment, such as, when picture size is larger, district (Region of interest) is paid close attention in its imaging needs this coding/decoding method when irregular compared with large and illumination condition.Because two to three continuous images are acquired and are stitched together, the Downside Risk of dirty image can be lowered; In addition, the image attention district that only comprises bar code content having reduced also can significantly reduce the time that image is processed.
The present invention is not limited to described embodiment, and those skilled in the art, not departing from spirit of the present invention openly in scope, still can do some corrections or change, therefore the scope that the scope of the present invention limits with claims is as the criterion.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310594230.0A CN103702036A (en) | 2013-11-21 | 2013-11-21 | Wide-dynamic range decoding method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310594230.0A CN103702036A (en) | 2013-11-21 | 2013-11-21 | Wide-dynamic range decoding method |
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| CN103702036A true CN103702036A (en) | 2014-04-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106898293A (en) * | 2017-02-16 | 2017-06-27 | 深圳市奥拓电子股份有限公司 | A kind of light-emitting diode display and its display brightness method of adjustment |
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