CN103690137A - Endoscope light source brightness automatic adjusting method and device - Google Patents
Endoscope light source brightness automatic adjusting method and device Download PDFInfo
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- CN103690137A CN103690137A CN201410005902.4A CN201410005902A CN103690137A CN 103690137 A CN103690137 A CN 103690137A CN 201410005902 A CN201410005902 A CN 201410005902A CN 103690137 A CN103690137 A CN 103690137A
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Abstract
The invention discloses an endoscope light source brightness automatic adjusting method and device, solving the problems that the imaging environment of an endoscope is not stable and consequently the image brightness flickers. The method comprises the following steps: (S1) obtaining the current image brightness value and current luminous flux output level; (S2) calculating the brightness relative difference according to the current image brightness value and the preset image brightness reference value; (S3) searching for the corresponding target luminous flux output level from the preset brightness relative difference table according to the current luminous flux output level and the brightness relative difference; (S4) adjusting the endoscope light source to the target luminous flux output level. In the invention, the target luminous flux output level is searched from the preset brightness relative difference table, and then the endoscope light source brightness is accurately and automatically adjusted, so that the endoscope system can stably and quickly obtain an image with ideal brightness.
Description
Technical field
The present invention relates to endoscopic technique field, relate in particular to a kind of method and apparatus of endoscope illuminator automatic brightness adjustment.
Background technology
In endoscopic procedures, doctor controls mirror body cavity is carried out to imaging, and imaging circumstances real-time change can impact the stability of brightness of image.In order to obtain ideal, lightness stabilized image, need to do processed to image, or light source be done to regulate and process.
In prior art, can be by Digital Image Processing, or adjusting brightness of display, the brightness that regulates image to show, but the image obtaining like this untrue makes doctor can not obtain effective Pathological Information of operating position to be seen, and result of use is not good.
In some endoscope product, adopt to control the method for light source luminescent power, regulate the rayed intensity of endoscopic imaging environment, thereby obtain suitable brightness of image, but the luminous power that constantly changes light source can affect the service life of light source.
In some endoscope product, employing arranges the method for brake sack on the output light path of constant light source, regulate the output light flux of light source, regulate the intensity of illumination of endoscopic imaging environment, still, in these endoscope product, the position of some brake sacks can only be switched at limited several gears, can not meticulously regulate exactly luminous flux, and some brake sacks regulate algorithm complicated, response speed is slow, and regulating effect is not good.
Summary of the invention
The object of the invention is to: overcome endoscope product in prior art and regulate light-source brightness automatically not regulate, or regulating effect is not good, the defects such as speed is slow, a kind of endoscope illuminator Automatic adjustment method and device are provided, can effectively automatically regulate the brightness of endoscope illuminator, and regulate accurately and fast, promote image quality.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A method for endoscope illuminator automatic brightness adjustment, is characterized in that, comprises the following steps:
S1: obtain present image brightness value, and current luminous flux output rank;
S2: according to described present image brightness value, and default brightness of image reference value, calculate brightness relative difference;
S3: according to described current luminous flux output rank, and described brightness relative difference, in default brightness relative difference table, find corresponding target light flux output rank;
S4: adjust described endoscope illuminator to described target light flux output rank.
Further, described method is further comprising the steps of:
S5: if described brightness relative difference is greater than the high-high brightness relative difference in described brightness relative difference table, adjusts described endoscope illuminator to highlight flux and export rank; If described brightness relative difference is less than the minimum brightness relative difference in described brightness relative difference table, adjusts described endoscope illuminator to minimum luminous flux and export rank.
Further, described luminous flux output rank, is to realize by being arranged on the diverse location of the brake sack in described endoscope illuminator.
Further, the position of described brake sack is controlled by motor, different motor position corresponding to luminous flux output rank.
Further, described brightness relative difference table is, for each initial luminous flux output rank and other combination of each target light flux output stage, all to have a default brightness relative difference corresponding with it.
Further, in described brightness relative difference table, vertical coordinate is initial luminous flux output rank, and abscissa is target light flux output rank, and the element in table is the relative difference of brightness of image corresponding to brightness of image corresponding to initial luminous flux output rank and target light flux output rank.
The present invention also provides a kind of device of endoscope illuminator automatic brightness adjustment, comprising:
Current information acquiring unit, for obtaining present image brightness value, and current luminous flux output rank;
Computing unit, for according to described present image brightness value, and default brightness of image reference value, calculate brightness relative difference;
Query unit, for exporting rank according to described current luminous flux, and described brightness relative difference, in default brightness relative difference table, find corresponding target light flux output rank;
Adjustment unit, for adjusting described endoscope illuminator to described target light flux output rank.
Further, described adjustment unit also has following functions: if described brightness relative difference is greater than the high-high brightness relative difference in described brightness relative difference table, adjusts described endoscope illuminator to highlight flux and export rank; If described brightness relative difference is less than the minimum brightness relative difference in described brightness relative difference table, adjusts described endoscope illuminator to minimum luminous flux and export rank.
Further, described luminous flux output rank, is to realize by being arranged on the diverse location of the brake sack in endoscope illuminator.
Further, described brightness relative difference table is, for each initial luminous flux output rank and other combination of each target light flux output stage, all to have a default brightness relative difference corresponding with it.
The invention has the beneficial effects as follows: a kind of endoscope illuminator automatic brightness adjustment method and apparatus is provided, can automatically regulate according to image quality the light source output intensity of endoscope, regulate fast, accurately, make endoscope can stablize, obtain rapidly the image of desirable brightness.
Accompanying drawing explanation
Fig. 1 is the structural representation of the endoscopic system that adopts of endoscope illuminator automatic brightness adjustment method of the present invention;
Fig. 2 is shown in Fig. 1 in structural representation, the structural representation of endoscope illuminator.
Fig. 3 is the endoscope illuminator automatic brightness adjustment method flow diagram of the embodiment of the present invention one.
Fig. 4 is the brightness relative difference list structure figure using in the endoscope illuminator automatic brightness adjustment method of the embodiment of the present invention one.
Fig. 5 is the structural representation of the endoscope illuminator automatic brightness regulating device of the embodiment of the present invention two.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
As shown in Figure 1, the endoscopic system that the embodiment of the present invention adopts comprises endoscope illuminator 10, mirror body 20, processor 30 and display 40, wherein, described endoscope illuminator 10 interior details and the part that is connected with mirror body 20 are as shown in Figure 2, described endoscope illuminator 10 comprises xenon lamp with parabolic reflecting bowl (or LED lamp etc.) 2, hot mirror 3, heat absorption glass 4, lens 1 and brake sack 5, and described mirror body 20 comprises lamp guide 6, optical fiber transmission light beam 7 and disperses and use planoconcave lens (not shown).Described lamp guide 6 is positioned at one end of described mirror body 20, this end and described endoscope illuminator 10 join, between the collecting lens 1 and the lamp guide 6 in described mirror body 20 of described brake sack 5 in described endoscope illuminator 10, the other end of described lamp guide 6 and optical fiber transmission light beam 7 join, thereby make light that described endoscope illuminator 10 sends through lamp guide 6, optical fiber transmission light beam 7 and disperse with arriving after planoconcave lens in human body, for the imaging lens in described mirror body 20 provides illumination.Described mirror body 20 is connected with described processor 30 again simultaneously, and the picture signal that processor 30 obtains mirror body 20 is given display 40 and demonstrated image after processing.
Described brake sack 5 is around the rotating shaft rotation perpendicular to optical axis, by its rotational angle of step motor control.In certain embodiments, brake sack 5 also can be around the rotating shaft rotation that is parallel to optical axis.Described brake sack 5 is divided into several position to the process of not blocking light beam completely according to the required precision of practical application from sheltering from Beam rotation completely, for example N position, corresponding N luminous flux exported rank, according to the imaging circumstances of endoscopic applications, between this N luminous flux output rank, realize automatically and regulating.Because brake sack 5 is by step motor drive, so in the automatic adjusting of the present step motor drive direction of final body and step number, motor is to there being N position rank.
The light source of power stability, in certain region in space, there is the approximation relation of being explained as formula (1) in the relative difference of brightness relative difference and light source output light flux.
In formula (1), the brightness relative difference that Δ I represents, I
0represent target brightness value, I
crepresent present image brightness value, Δ φ represents light source output light flux relative difference, φ
0represent light source target output light flux value, φ
crepresent the current output light flux value of light source.
From formula (1), brightness of image relative difference is consistent with light source output light flux relative difference.
Described present image brightness value I
ccan calculate and obtain by the Y-signal in present image YCbCr space, therefore can calculate by measurement the relative difference of present image brightness value and target image brightness value, obtain luminous flux relative difference, thereby obtain target light flux output rank, i.e. motor target location rank.And then adjustment motor, drive brake sack to suitable position.
Because the initial position of brake sack may be any one in N position rank, it is for example i, in unsettled imaging circumstances, difference between the present image brightness value obtaining and default brightness of image reference value is arbitrarily, therefore, can each initial position of corresponding brake sack and the combination of each target location, calculate the relative different of its luminous flux, set up a luminous flux relative difference table.Because luminous flux relative difference is approximately equal to brightness relative difference, therefore can correspondence establishment brightness relative difference table, corresponding N the target light flux of its horizontally-arranged exported rank, i.e. target motor position, corresponding N the initial luminous flux output of its file rank, i.e. initial motor position.When endoscopic system gets after present image brightness, with default brightness of image reference value comparison, and calculate brightness relative difference, according to this luminance difference, in horizontally-arranged corresponding to i initial position, search the value approximate with this brightness relative difference, be for example j value, this j target location corresponding to value is the target location that described motor need to be adjusted to.Thereby realize the automatic adjusting of endoscope illuminator brightness, and a two field picture carries out primary source output and regulates, and makes light source output governing speed consistent with video imaging speed, solve the bright flicker problem of the slow image causing of light source governing speed.
Be more than the application's core concept, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention be clearly and completely described.Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
embodiment mono-
The embodiment of the present invention one provides a kind of method of endoscope illuminator automatic brightness adjustment.Referring to Fig. 3, the endoscope illuminator automatic brightness adjustment method of the embodiment of the present invention one comprises step S1-S4:
S1: obtain present image brightness value, and current luminous flux output rank;
Obtain present image brightness value, can adopt the technology such as average metering of the prior art or peak value photometry, quantize the brightness value when last two field picture.Current luminous flux output rank, can carry out the output rank of labelling luminous flux according to the current location of motor rank of living in, requirement does not dissolve the occurrence of current luminous flux.
S2: according to described present image brightness value, and default brightness of image reference value, calculate brightness relative difference;
Default brightness of image reference value, be desirable brightness of image value, described brightness relative difference, is the poor of brightness of image reference value and present image brightness value, with the ratio of present image brightness value, described brightness relative difference is the foundation that endoscope illuminator luminous flux regulates.
S3: according to described current luminous flux output rank, and brightness relative difference, in default brightness relative difference table, find corresponding target light flux output rank;
Default brightness relative difference list structure as shown in Figure 4, this table comprises that any i the position of brake sack from N initial position moves to the luminous flux relative difference that any j the position in N target location produces, described luminous flux relative difference is the poor of the luminous flux of brake sack when target location and the luminous flux when initial position, ratio with luminous flux when the initial position, according to explanation above, the relative difference of brightness of image when the relative difference of this luminous flux approximates brake sack and moves to j target location from i initial position, therefore according to the brightness relative difference calculating in S2 step, in current luminous flux output rank, be in the corresponding horizontally-arranged of brake sack initial position, find with this brightness relative difference recently like value, this is worth corresponding target location and is target light flux output rank.
S4: adjust described endoscope illuminator to described target light flux output rank.
According to the target light flux output rank finding in S3 step, drive stepping motor, mobile brake sack is to corresponding target location.
In the process of described adjustment, also may run into such situation: due to the reason of imaging circumstances, may cause the present image brightness value that S1 step gets to cross bright or excessively dark, make the relative brightness difference that calculates in S2 step too small or excessive, cause in S3 step, described brightness relative difference is less than the minima of default luminance difference in the horizontally-arranged that its initial position is corresponding, or be greater than its maximum, in this case, regulate motor, make brake sack lay respectively at accordingly the position of luminous flux minimum, or maximum position.Light source due to endoscope's employing power stability, in most cases, brightness relative difference in default brightness relative difference table is enough endoscope illuminator adjusting uses, above-mentioned situation is to arrange in order to consider the integrity of endoscope illuminator brightness regulation mechanism, increases the robustness of this control method.
As seen from the above technical solution, the endoscope illuminator automatic brightness adjustment method of the embodiment of the present invention one, can realize the automatic adjusting of endoscope illuminator brightness, and, one two field picture carries out primary source output and regulates, make light source output governing speed consistent with video imaging speed, governing speed is fast.Owing to can determining according to actual needs luminous flux output level precision, make brightness regulation meticulous, accurate.
embodiment bis-
Referring to Fig. 5, the embodiment of the present invention two provides a kind of endoscope illuminator automatic brightness regulating device.Described device comprises:
Current information acquiring unit 501, for obtaining present image brightness value, and current luminous flux output rank;
Preferably, adjustment unit 504 also has following functions: if the brightness relative difference that computing unit 502 calculates is greater than the high-high brightness relative difference in default brightness relative difference table, adjusts endoscope illuminator brightness to highlight flux and export rank; If the brightness relative difference that computing unit 502 calculates is less than the minimum brightness relative difference in default brightness relative difference table, adjusts endoscope illuminator brightness to minimum luminous flux and export rank.
The device of the embodiment of the present invention two is comprised of the unit module running on endoscopic system processor, and because described device is corresponding with the method for the embodiment of the present invention one, so description is fairly simple, relevant part partly illustrates referring to method.
A kind of endoscope illuminator automatic brightness adjustment the method and apparatus above embodiment of the present invention being provided is described in detail, but the explanation of above embodiment is just understood method of the present invention and core concept thereof for helping, and should not be construed as limitation of the present invention.In the technical scope that those skilled in the art disclose in the present invention, the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.
Claims (10)
1. a method for endoscope illuminator automatic brightness adjustment, is characterized in that, comprises the following steps:
S1: obtain present image brightness value, and current luminous flux output rank;
S2: according to described present image brightness value, and default brightness of image reference value, calculate brightness relative difference;
S3: according to described current luminous flux output rank, and described brightness relative difference, in default brightness relative difference table, find corresponding target light flux output rank;
S4: adjust described endoscope illuminator to described target light flux output rank.
2. the method for endoscope illuminator automatic brightness adjustment according to claim 1, is characterized in that, further comprising the steps of:
S5: if described brightness relative difference is greater than the high-high brightness relative difference in described brightness relative difference table, adjusts described endoscope illuminator to highlight flux and export rank; If described brightness relative difference is less than the minimum brightness relative difference in described brightness relative difference table, adjusts described endoscope illuminator to minimum luminous flux and export rank.
3. the method for endoscope illuminator automatic brightness adjustment according to claim 1 and 2, is characterized in that, described luminous flux output rank, is to realize by being arranged on the diverse location of the brake sack in described endoscope illuminator.
4. the method for endoscope illuminator automatic brightness adjustment according to claim 3, is characterized in that, the position of described brake sack is controlled by motor, different motor position corresponding to luminous flux output rank.
5. the method for endoscope illuminator automatic brightness adjustment according to claim 1 and 2, it is characterized in that, described brightness relative difference table is, for each initial luminous flux output rank and other combination of each target light flux output stage, all there is a default brightness relative difference corresponding with it.
6. the method for endoscope according to claim 5 automatic brightness adjustment, it is characterized in that, in described brightness relative difference table, vertical coordinate is initial luminous flux output rank, abscissa is target light flux output rank, and the element in table is the relative difference of brightness of image corresponding to brightness of image corresponding to initial luminous flux output rank and target light flux output rank.
7. a device for endoscope illuminator automatic brightness adjustment, is characterized in that, comprising:
Current information acquiring unit, for obtaining present image brightness value, and current luminous flux output rank;
Computing unit, for according to described present image brightness value, and default brightness of image reference value, calculate brightness relative difference;
Query unit, for exporting rank according to described current luminous flux, and described brightness relative difference, in default brightness relative difference table, find corresponding target light flux output rank;
Adjustment unit, for adjusting described endoscope illuminator to described target light flux output rank.
8. the device of endoscope illuminator automatic brightness adjustment according to claim 7, it is characterized in that, described adjustment unit also has following functions: if described brightness relative difference is greater than the high-high brightness relative difference in described brightness relative difference table, adjusts described endoscope illuminator to highlight flux and export rank; If described brightness relative difference is less than the minimum brightness relative difference in described brightness relative difference table, adjusts described endoscope illuminator to minimum luminous flux and export rank.
9. according to the device of the endoscope illuminator automatic brightness adjustment described in claim 7 or 8, it is characterized in that, described luminous flux output rank, is to realize by being arranged on the diverse location of the brake sack in endoscope illuminator.
10. the device of endoscope illuminator automatic brightness adjustment according to claim 6, it is characterized in that, described brightness relative difference table is, for each initial luminous flux output rank and other combination of each target light flux output stage, all there is a default brightness relative difference corresponding with it.
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| CN106419807A (en) * | 2016-10-30 | 2017-02-22 | 苏州市克拉思科文化传播有限公司 | Intelligent medical endoscope |
| CN106821292A (en) * | 2016-12-27 | 2017-06-13 | 吴中区穹窿山德毅新材料技术研究所 | A kind of intelligent digital is imaged gastroscope |
| CN107436299A (en) * | 2017-07-25 | 2017-12-05 | 苏州德锐特成像技术有限公司 | A kind of bioluminescence imaging brightness automatically analyzes the method and apparatus of regulation |
| CN107610187A (en) * | 2017-09-19 | 2018-01-19 | 青岛海信电器股份有限公司 | A kind of control method, device and endoscope system for medical endoscope and image processing device collection image |
| CN110384470A (en) * | 2019-07-22 | 2019-10-29 | 深圳开立生物医疗科技股份有限公司 | A kind of light-dimming method of endoscope illuminator, device, light source assembly and endoscope |
| CN111403007A (en) * | 2018-12-29 | 2020-07-10 | 深圳迈瑞生物医疗电子股份有限公司 | Ultrasonic imaging optimization method, ultrasonic imaging system and computer-readable storage medium |
| CN112565621A (en) * | 2020-12-01 | 2021-03-26 | 浙江华诺康科技有限公司 | Endoscope light source brightness and exposure adjusting method and device and readable storage medium |
| CN112998633A (en) * | 2021-03-03 | 2021-06-22 | 重庆金山医疗器械有限公司 | Control method for light output of endoscope and endoscope system |
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| CN106419807A (en) * | 2016-10-30 | 2017-02-22 | 苏州市克拉思科文化传播有限公司 | Intelligent medical endoscope |
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| CN110384470A (en) * | 2019-07-22 | 2019-10-29 | 深圳开立生物医疗科技股份有限公司 | A kind of light-dimming method of endoscope illuminator, device, light source assembly and endoscope |
| CN110384470B (en) * | 2019-07-22 | 2021-09-28 | 深圳开立生物医疗科技股份有限公司 | Light adjusting method and device for endoscope light source, light source assembly and endoscope |
| CN112565621A (en) * | 2020-12-01 | 2021-03-26 | 浙江华诺康科技有限公司 | Endoscope light source brightness and exposure adjusting method and device and readable storage medium |
| CN112998633A (en) * | 2021-03-03 | 2021-06-22 | 重庆金山医疗器械有限公司 | Control method for light output of endoscope and endoscope system |
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