CN104184962A - DSP (digital signal processor) and image processing based all-weather image acquisition system - Google Patents
DSP (digital signal processor) and image processing based all-weather image acquisition system Download PDFInfo
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- CN104184962A CN104184962A CN201410394880.5A CN201410394880A CN104184962A CN 104184962 A CN104184962 A CN 104184962A CN 201410394880 A CN201410394880 A CN 201410394880A CN 104184962 A CN104184962 A CN 104184962A
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Abstract
The invention relates to a DSP (digital signal processor) and image processing based all-weather image acquisition system, which comprises a DSP, wherein the DSP is connected with a visible light image acquisition device, an uncooled focal plane infrared image acquisition device and a storage device; the visible light image acquisition device is used for acquiring the current visible light images; the uncooled focal plane infrared image acquisition device is used for acquiring the current infrared images; the storage device is used for storing the acquired image data; the DSP calculates the gray level of visible light image data by using the acquired visible light image data, compares an acquired value with a threshold value, and judges the effectiveness of the visible light image data, thereby controlling whether the uncooled focal plane infrared image acquisition device is started or not to acquire the current infrared image data. The image acquisition system provided by the invention realizes acquisition of effective image data in an all-weather mode under complex background and natural environment.
Description
Technical field
The present invention relates to round-the-clock technical field of image acquisition, particularly relate to a kind of round-the-clock image-taking system based on DSP and image processing.
Background technology
At present, relate in the field of image processing, a crucial problem is effective image data acquisition.System whether can be under complex background and natural environment round-the-clock any period can obtain effective view data, directly affect system rear end and user to the alarm of target and subsequent treatment, particularly in monitoring, intelligent security guard field, the very large application demand of obtaining to target image, therefore becomes image and processes and monitor one of key technology in safety-security area research.
The drawback that simple visible images obtains is when obtaining the illumination of environment lower, and during lower than the working range of device, the image of acquisition is invalid, cannot identification; And the power consumption that simple infrared image obtains is larger, and may there is the problem of intense laser interfere during according to strong or Complex Natural Environment and background when ambient light.
In sum, at present need to be under complex background and natural environment the round-the-clock system and method that obtains effective view data.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of round-the-clock image-taking system based on DSP and image processing, and volume is little, low in energy consumption, effective.
The technical solution adopted for the present invention to solve the technical problems is: a kind of round-the-clock image-taking system based on DSP and image processing is provided, comprise dsp processor, described dsp processor is connected with memory device with visible images acquisition device, non-refrigeration focal surface infrared image acquisition device respectively; Described visible images acquisition device is used for obtaining current visible images; Described non-refrigeration focal surface infrared image acquisition device is used for obtaining current infrared image; Described memory device is for storing the view data of acquisition; Described dsp processor is used the visible images data that obtain, the gray scale of visible images data is calculated and the value obtaining and threshold value are compared, the validity of judgement visible images data, controls and whether opens non-refrigeration focal surface infrared image acquisition device and obtain current infrared picture data with this.
Described dsp processor calculates the gray feature value of the visible images data that obtain
wherein, the k point grey scale pixel value that I (k) is image, W is picture traverse, H is picture altitude.
When EVE > K, be judged as visible images data effective; Otherwise, be judged as visible images data invalid.
Described visible images acquisition device and the timesharing of non-refrigeration focal surface infrared image acquisition device are used same data-interface to described dsp processor transmit image data, and described dsp processor comes timesharing to enable visible images acquisition device or non-refrigeration focal surface infrared image acquisition device by enable signal.
Described dsp processor carries out after initial configuration visible images acquisition device and non-refrigeration focal surface infrared image acquisition device, by visible images acquisition device described in programmable I/O pin enabled of software control dsp processor, make visible images acquisition device by data-interface to dsp processor transmit image data, and make described non-refrigeration focal surface infrared image acquisition device in wait state; The data that dsp processor obtains visible images acquisition device are carried out after view data processing, judge that whether this view data is available effectively, if effectively, this view data is exported to rear end by data output interface; If invalid, dsp processor makes described visible images acquisition device in wait state, enable non-refrigeration focal surface infrared image acquisition device simultaneously, make non-refrigeration focal surface infrared image acquisition device by data-interface to dsp processor transmit image data, dsp processor is exported to rear end by this view data by data output interface.
Beneficial effect
Owing to having adopted above-mentioned technical scheme, the present invention compared with prior art, there is following advantage and good effect: the present invention has realized and round-the-clockly under complex background and natural environment obtained effective view data, is particularly suitable for the environment of having relatively high expectations in monitoring, this quality of data in intelligent security guard field.
Accompanying drawing explanation
Fig. 1 is software section schematic diagram of the present invention;
Fig. 2 is workflow schematic diagram of the present invention;
Fig. 3 is hardware structure diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiments of the present invention relate to a kind of round-the-clock image-taking system based on DSP and image processing, as shown in Figure 3, comprise dsp processor, described dsp processor is connected with memory device with visible images acquisition device, non-refrigeration focal surface infrared image acquisition device respectively; Described visible images acquisition device is used for obtaining current visible images; Described non-refrigeration focal surface infrared image acquisition device is used for obtaining current infrared image; Described memory device is for storing the view data of acquisition; Described dsp processor is used the visible images data that obtain, the gray scale of visible images data is calculated and the value obtaining and threshold value are compared, the validity of judgement visible images data, controls and whether opens non-refrigeration focal surface infrared image acquisition device and obtain current infrared picture data with this.
As shown in Figure 1, described dsp processor calculates the gray feature value of the visible images data that obtain
wherein, the k point grey scale pixel value that I (k) is image, W is picture traverse, H is picture altitude.When EVE > K, be judged as visible images data effective; Otherwise, be judged as visible images data invalid, enable non-refrigeration focal surface infrared image acquisition device.
As shown in Figure 2, the round-the-clock image-taking system idiographic flow based on DSP and image processing of the present invention is as follows:
Step 201, dsp processor carries out initial configuration to visible images acquisition device and non-refrigeration focal surface infrared image acquisition device, be configured to the mode of operation of two devices, comprise image resolution ratio, frame per second, view data frame number and operating state etc.
Step 202, two image acquisition devices after step 201 configuration are enabled to distribute, due to the quantitative limitation of dsp processor outbound data number of ports, therefore visible images acquisition device and the timesharing of non-refrigeration focal surface infrared image acquisition device are used same data-interface to dsp processor transmit image data, and dsp processor comes timesharing to enable visible images acquisition device or non-refrigeration focal surface infrared image acquisition device by enable signal.First enable visible images acquisition device herein, non-refrigeration focal surface infrared image acquisition device is in wait state;
Step 203, dsp processor obtains visible data and carries out visible images data processing operation, the average gray value EVE of view data calculated,
wherein, the k point grey scale pixel value that I (k) is image, W is picture traverse, H is picture altitude;
Step 204, judges the average gray value EVE of the visible images data that obtain before, when EVE > K, is judged as visible images data effective; Otherwise, be judged as visible images data invalid.
Step 205, when step 204 judgement visible images data are invalid, dsp processor can enable non-refrigeration focal surface infrared image acquisition device, and makes visible images acquisition device in wait state.
Step 206, obtains the infrared picture data that non-refrigeration focal surface infrared image acquisition device obtains.
Step 207, after all operations before finishes, is transferred to rear end by final view data (visible data or infrared data) by data output interface.
According to above operation, the present invention has completed in the round-the-clock image acquisition of DSP and image processing, realized and round-the-clockly under complex background and natural environment obtained effective view data, be particularly suitable for the environment of having relatively high expectations in monitoring, this quality of data in intelligent security guard field.
Claims (5)
1. the round-the-clock image-taking system based on DSP and image processing, is characterized in that, comprise dsp processor, described dsp processor is connected with memory device with visible images acquisition device, non-refrigeration focal surface infrared image acquisition device respectively; Described visible images acquisition device is used for obtaining current visible images; Described non-refrigeration focal surface infrared image acquisition device is used for obtaining current infrared image; Described memory device is for storing the view data of acquisition; Described dsp processor is used the visible images data that obtain, the gray scale of visible images data is calculated and the value obtaining and threshold value are compared, the validity of judgement visible images data, controls and whether opens non-refrigeration focal surface infrared image acquisition device and obtain current infrared picture data with this.
2. the round-the-clock image-taking system based on DSP and image processing according to claim 1, is characterized in that, described dsp processor calculates the gray feature value of the visible images data that obtain
wherein, the k point grey scale pixel value that I (k) is image, W is picture traverse, H is picture altitude.
3. the round-the-clock image-taking system based on DSP and image processing according to claim 2, is characterized in that, when EVE > K, is judged as visible images data effective; Otherwise, be judged as visible images data invalid.
4. the round-the-clock image-taking system of processing based on DSP and image according to claim 1, it is characterized in that, described visible images acquisition device and the timesharing of non-refrigeration focal surface infrared image acquisition device are used same data-interface to described dsp processor transmit image data, and described dsp processor comes timesharing to enable visible images acquisition device or non-refrigeration focal surface infrared image acquisition device by enable signal.
5. the round-the-clock image-taking system of processing based on DSP and image according to claim 1, it is characterized in that, described dsp processor carries out after initial configuration visible images acquisition device and non-refrigeration focal surface infrared image acquisition device, by visible images acquisition device described in programmable I/O pin enabled of software control dsp processor, make visible images acquisition device by data-interface to dsp processor transmit image data, and make described non-refrigeration focal surface infrared image acquisition device in wait state; The data that dsp processor obtains visible images acquisition device are carried out after view data processing, judge that whether this view data is available effectively, if effectively, this view data is exported to rear end by data output interface; If invalid, dsp processor makes described visible images acquisition device in wait state, enable non-refrigeration focal surface infrared image acquisition device simultaneously, make non-refrigeration focal surface infrared image acquisition device by data-interface to dsp processor transmit image data, dsp processor is exported to rear end by this view data by data output interface.
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| CN109218600A (en) * | 2017-07-06 | 2019-01-15 | 许继集团有限公司 | A kind of converter valve image capture module Low-power-consumptiocontrol control method and image capturing system |
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