CN102829876A - Method for analyzing imaging effect of image quantitatively - Google Patents
Method for analyzing imaging effect of image quantitatively Download PDFInfo
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- CN102829876A CN102829876A CN2012103317809A CN201210331780A CN102829876A CN 102829876 A CN102829876 A CN 102829876A CN 2012103317809 A CN2012103317809 A CN 2012103317809A CN 201210331780 A CN201210331780 A CN 201210331780A CN 102829876 A CN102829876 A CN 102829876A
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Abstract
The invention pertains to the technical field of analysis on the imaging effect of an image and particularly discloses a method for analyzing the imaging effect of the image quantitatively. The method comprises the steps as follows: step 1: assembling a test target in an infrared test system and enabling the test target to be imaged in an infrared imaging system; step 2: outputting a video signal of the image obtained in the infrared imaging system; and step 3: monitoring by an oscilloscope the changes of peak-to-peak values on a certain row of waveform in the video signal; when the monitored peak signal is clear and bright in border and the signal is stable, recording the value of the peak-to-peak signal at this moment and simultaneously recording a position of a focal plane. According to the method, the operating steps are simple and the imaging quality of the infrared imaging system can be analyzed quantitatively. Furthermore, the measuring equipment is simple and easy to carry in the external field.
Description
Technical field
The invention belongs to image imaging effect analysis technical field, specifically, disclose a kind of method of quantitative test image imaging effect.
Background technology
Along with various novel infrared imaging systems obtain widespread use in the military and civilian field, the performance evaluation of infrared imaging system is seemed more and more important.Usually the method that adopts in optical system has, and through watching the method adjusting optical system imaging quality of outdoor scene or the MRTD value through seeing parallel light pipe measuring system of picture, whether the affirmation of best image planes is carried out through artificial subjective judgement clear picture.These two kinds of methods all have the limitation of himself.
Come the viewing optical system image quality through observing outdoor scene, method is simple but operability is poor, and is because the angle that the observer observes is different, also different to the evaluation of imaging system image quality.
And also have artificial subjectivity through the MRTD value of seeing parallel light pipe measuring system of picture.When measuring infrared imaging system MRTD, observe interpretation, can distinguish image with 75% observer during judgement and be as the criterion by 4 observers.The observer can estimate infrared imaging system MRTD value according to the size of the MRTD value of surveying and whether satisfy index request, can assess the quality of image quality between the product Different Individual simultaneously according to the MRTD value.
Above-mentioned two kinds of measuring methods, because influence such as tested person environment, observer's subjective factor is bigger in test process, so there is bigger difference in this measured value, therefore must seek a kind ofly can make testing staff's quantitative test system under test (SUT) image quality method.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, adapt to practical demand, a kind of method of quantitative test image imaging effect is provided.
In order to realize the object of the invention, the technical scheme that the present invention adopts is:
A kind of method of quantitative test image imaging effect is characterized in that, comprises the steps:
The first step is assembled test target in the infrared test system, and test target is formed images in infrared imaging system;
Second step, the image video signal that will in infrared imaging system, obtain output;
The 3rd step, with the peak-to-peak value situation of change of certain delegation's waveform in the oscillograph monitoring video signal, when the clear bright signal stabilization of the peak-to-peak value signal boundary that monitors, the peak-to-peak value signal magnitude of record this moment, and the record position of focal plane at this moment.
Said test target is four bar targets.
Beneficial effect of the present invention is:
1. operation steps is simple, image quality that can the quantitative test infrared imaging system;
2. measuring equipment is simple, is easy to the outfield and carries.
Description of drawings
The device connection diagram that Fig. 1 adopts the present invention to test.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified:
Embodiment: referring to Fig. 1.
A kind of method of quantitative test image imaging effect is characterized in that, comprises the steps:
The first step is assembled test target in the infrared test system, and test target is formed images in infrared imaging system;
Second step, the image video signal that will in infrared imaging system, obtain output;
The 3rd step, with the peak-to-peak value situation of change of certain delegation's waveform in the oscillograph monitoring video signal, when the clear bright signal stabilization of the peak-to-peak value signal boundary that monitors, the peak-to-peak value signal magnitude of record this moment, and the record position of focal plane at this moment.
Said test target is four bar targets.
Illustrate detail operations step of the present invention at present:
A. infrared imaging system start;
Select four suitable bar targets as test target, be assembled in the infrared test system, can produce the directional light of simulation infinite distance after the energising of infrared test system;
The test target and the background temperature difference are set to 1k, so that under the state effect of target imaging is judged more clearly at the imageable target profile, to confirm best image planes position;
B. after parameter sets,, observe image with infra-red thermal imaging instrument, and vision signal is exported the energising of infrared test system;
C. use the peak-to-peak value situation of change of certain delegation's waveform in the oscillograph monitoring video signal;
Through regulating the position of infrared imaging system focal plane; Record various signals peak-to-peak value, when clear bright signal stabilization of the peak-to-peak value signal boundary that monitors and value maximum, record peak-to-peak value signal magnitude at this moment; And the position of record focal plane this moment, this position is the optimal focal plane position;
D. the test of carrying out the same model different product through this method is regulated, and can fast detecting goes out the image quality of product, and quick adjustment simultaneously reaches the position of optimal focal plane, improves the image quality of product.
What embodiments of the invention were announced is preferred embodiment, but is not limited thereto those of ordinary skill in the art; Very easily, understand spirit of the present invention, and make different amplifications and variation according to the foregoing description; But only otherwise break away from spirit of the present invention, all in protection scope of the present invention.
Claims (2)
1. the method for a quantitative test image imaging effect is characterized in that, comprises the steps:
The first step is assembled test target in the infrared test system, and test target is formed images in infrared imaging system;
Second step, the image video signal that will in infrared imaging system, obtain output;
The 3rd step, with the peak-to-peak value situation of change of certain delegation's waveform in the oscillograph monitoring video signal, when the clear bright signal stabilization of the peak-to-peak value signal boundary that monitors, the peak-to-peak value signal magnitude of record this moment, and the record position of focal plane at this moment.
2. the method for quantitative test image imaging effect according to claim 1 is characterized in that: said test target is four bar targets.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103317809A CN102829876A (en) | 2012-09-10 | 2012-09-10 | Method for analyzing imaging effect of image quantitatively |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103317809A CN102829876A (en) | 2012-09-10 | 2012-09-10 | Method for analyzing imaging effect of image quantitatively |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108053389A (en) * | 2018-03-16 | 2018-05-18 | 南京航空航天大学 | A kind of method for evaluating the infrared four bars target image definition of low signal-to-noise ratio |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587928A (en) * | 2004-09-09 | 2005-03-02 | 中国科学院上海技术物理研究所 | Image surface correcting structure for imaging spectrograph |
| CN201021904Y (en) * | 2007-01-12 | 2008-02-13 | 昆明物理研究所 | Low frequency outside synchronization wave cutter for infrared detector of iron electrical focus plane |
| US7683321B1 (en) * | 2008-12-19 | 2010-03-23 | Fluke Corporation | Shutterless infrared imager algorithm with drift correction |
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2012
- 2012-09-10 CN CN2012103317809A patent/CN102829876A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587928A (en) * | 2004-09-09 | 2005-03-02 | 中国科学院上海技术物理研究所 | Image surface correcting structure for imaging spectrograph |
| CN201021904Y (en) * | 2007-01-12 | 2008-02-13 | 昆明物理研究所 | Low frequency outside synchronization wave cutter for infrared detector of iron electrical focus plane |
| US7683321B1 (en) * | 2008-12-19 | 2010-03-23 | Fluke Corporation | Shutterless infrared imager algorithm with drift correction |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108053389A (en) * | 2018-03-16 | 2018-05-18 | 南京航空航天大学 | A kind of method for evaluating the infrared four bars target image definition of low signal-to-noise ratio |
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Application publication date: 20121219 |