CN1043285C - Processing device for fog image - Google Patents
Processing device for fog image Download PDFInfo
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- CN1043285C CN1043285C CN94112135A CN94112135A CN1043285C CN 1043285 C CN1043285 C CN 1043285C CN 94112135 A CN94112135 A CN 94112135A CN 94112135 A CN94112135 A CN 94112135A CN 1043285 C CN1043285 C CN 1043285C
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Abstract
The present invention relates to a processing device for fog images. The device comprises a photographing device, an A/D converter, an image processor, a storage device, a control device and a display device, wherein the A/D converter is used for carrying out A/D conversion for the photographed pixel grey scale signals; the image processor carries out grey scale transformation for the digital grey scale signals according to a predetermined pixel grey scale transformation table; the storage device is used for storing the digital grey scale signals before and after the conversion; the control device is used for controlling the output of the storage device; the display device is used for converting the digital signals output from the storage device into analog signal and for displaying the images. The present invention can immediately recover the images photographed in foggy days into clear images.
Description
The present invention relates to a kind of image processing apparatus, relate in particular to a kind of be used to handle following device of taking the photograph image of vaporific attitude arranged.
In the weather of mist was arranged, steamer or driver always turned on illuminating lamp in order to ensure traffic safety, and reduced travel speed, caused traffic jam self-evident, usually the generation that still can not avoid traffic accident.
A kind of solution is to utilize image processing apparatus with after the picked-up of the place ahead scene, carries out image processing, reverts to view more clearly, thereby remedies the deficiency of human eye.But the histogram equalization technology that discloses in No. 3,983,320, traditional image processing techniques such as the United States Patent (USP) can not reach this effect.
The object of the invention is to provide a kind of following image processing apparatus of taking the photograph image of vaporific attitude that be used to handle.
Image processing apparatus of the present invention comprises: the camera head that is used for pickup image; The analog gray scale conversion of signals of each pixel that camera head is produced becomes the analog-digital commutator of digital gray scale signal; Image processor according to the predetermined described digital gray scale signal of pixel greyscale transformation table transform; The storage device that is used for the grey scale signal of store transformed front and back; Be used for the digital gray scale signal transformation of storage device output is become the analog gray scale signal and carries out the display unit that image shows; The control device that is used for the output of control store device.
Utilize image processing apparatus of the present invention, can with fuzzy view that road the place ahead under the greasy weather gas arranged in real time (for example in 0.1 second) be transformed into the clear and accurate image and be presented on the screen, steamer or driver can improve travel speed greatly with this device, eliminate the traffic jam phenomenon, and the generation that avoids traffic accident.
Below with reference to the accompanying drawings preferred embodiment of the present invention is described, therefrom also can find out other purpose of the present invention and advantage.
Fig. 1 is the block diagram of an embodiment of image processing apparatus of the present invention.
Fig. 2 is the image processing flow chart of Fig. 1 embodiment.
Fig. 3 is one of image grey level histogram example before the conversion.
Fig. 4 is the histogram of Fig. 3 histogram after greyscale transformation.
Referring to Fig. 1, the image processing apparatus block diagram of one embodiment of the invention shown in it.Camera head 1 pickup image produces the analog gray scale signal of each pixel.D/A converter 2 becomes digital signal with this signal transformation.This digital signal deposits in the storage device 3, is handled by image processor 4 simultaneously.Image processor 4 is done greyscale transformation according to predetermined pixel greyscale transformation table, and the grey scale signal after the conversion is deposited in the storage device 3.Display unit 5 becomes analog signal with the digital gray scale signal transformation of storage device 3 outputs, carries out image and shows.Control device 6 can control store device 3 output transforms before or the grey scale signal after the conversion.Image processor 4 according to the grey scale signal before the conversion, produced histogram before doing the image processing, show in display unit 5, and the operator specifies suitable predetermined pixel gradation conversion table in view of the above in image processor 4, be for further processing by image processor.
Referring to Fig. 2, the image processing flow process of embodiment of image processing apparatus of the present invention shown in it.
At S0, image processing apparatus is started working, and at S1, by camera head 1 pickup image, produces the analog gray scale signal, with its digitlization, stores, and produces the histogram of grey scale signal.At S2, the above-mentioned histogrammic situation that the operator shows according to display unit 5 is selected suitable one from a plurality of predetermined pixel gradation conversion tables, carry out greyscale transformation by image processor 4.At S3, the signal after the store transformed.At S4, the operator can show the forward and backward image of conversion by display unit 6 as required.At S5, judge whether end process, if not, then return S1, repeat abovementioned steps.If then end process is preserved the data that obtained.
It is a case each that Fig. 3, Fig. 4 illustrate the forward and backward pixel grey level histogram of conversion respectively.Fig. 3 is a histogram of taking the photograph image following of thick fog weather, finds out that therefrom its pixel gray scale is comparatively concentrated, and this shows that each pixel gray scale is approaching, thereby contour of object is not clear, and image a slice is fuzzy.And in the histogram after conversion, the pixel intensity profile is drawn back, and various gray scales all have certain pixel number, shows that image level is clearly demarcated, and contour of object is clear.
Preferred embodiment of the present invention more than has been described, after having understood connotation of the present invention, those skilled in the art can make multiple modification to it, and unlikely departing from the scope of the present invention.
Claims (3)
1. image processing apparatus, it comprises: the camera head that is used for pickup image; The analog gray scale conversion of signals of each pixel that camera head is produced is the analog-digital commutator of digital gray scale signal, it is characterized in that further comprising: according to the image processor of the predetermined described digital gray scale signal of pixel grey scale map table conversion; The storage device that is used for the forward and backward digital gray scale signal of store transformed; Be used for the digital gray scale signal transformation of storage device output is become the analog digital grey scale signal and carries out the display unit that image shows; And the control device that is used for the output of control store device.
2. image processing apparatus as claimed in claim 1 is characterized in that described image processor produces histogram according to the digital gray scale signal that analog-digital commutator provides.
3. image processing apparatus as claimed in claim 1, it is a plurality of to it is characterized in that described predetermined pixel grey scale map table has, and described image processor carries out conversion according to a map table of being chosen by the operator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94112135A CN1043285C (en) | 1994-04-26 | 1994-04-26 | Processing device for fog image |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94112135A CN1043285C (en) | 1994-04-26 | 1994-04-26 | Processing device for fog image |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1110851A CN1110851A (en) | 1995-10-25 |
| CN1043285C true CN1043285C (en) | 1999-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94112135A Expired - Fee Related CN1043285C (en) | 1994-04-26 | 1994-04-26 | Processing device for fog image |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1043285C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401775C (en) * | 2005-10-28 | 2008-07-09 | 沈阳理工大学 | Fog interference resistant camera system |
| CN101588481B (en) * | 2009-06-15 | 2011-01-19 | 浙江金汇科技股份有限公司 | CCD fog-penetration imaging system and control method |
| CN101783012B (en) * | 2010-04-06 | 2012-05-30 | 中南大学 | Automatic image defogging method based on dark primary colour |
| WO2012003610A1 (en) * | 2010-07-06 | 2012-01-12 | 彪马集团有限公司 | Networked fog penetrating imaging monitor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5301240A (en) * | 1990-12-14 | 1994-04-05 | Battelle Memorial Institute | High-speed video instrumentation system |
-
1994
- 1994-04-26 CN CN94112135A patent/CN1043285C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5301240A (en) * | 1990-12-14 | 1994-04-05 | Battelle Memorial Institute | High-speed video instrumentation system |
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| Publication number | Publication date |
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| CN1110851A (en) | 1995-10-25 |
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Owner name: BAO NAIJUN; Free format text: FORMER OWNER: HUANG ZHENWEI Effective date: 20040521 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20040521 Address after: 401 room 1755, middle Huaihai Road, Shanghai, 200030 Co-patentee after: Bao Naijun Patentee after: Bao Chengzhi Address before: 401 room 1755, middle Huaihai Road, Shanghai, 200000 Co-patentee before: Huang Zhenwei Patentee before: Bao Chengzhi |
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| C17 | Cessation of patent right | ||
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Granted publication date: 19990505 |