CN103118229A - Imaging method and imaging system - Google Patents
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- CN103118229A CN103118229A CN2013100480841A CN201310048084A CN103118229A CN 103118229 A CN103118229 A CN 103118229A CN 2013100480841 A CN2013100480841 A CN 2013100480841A CN 201310048084 A CN201310048084 A CN 201310048084A CN 103118229 A CN103118229 A CN 103118229A
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Abstract
The invention discloses an imaging method and an imaging system. The method is applied to the system and includes the steps: receiving a light signal reflected by a detected object; converting the light signal into an electric signal; converting the electric signal into a brightness signal to generate a corresponding first image; processing data of the first image to obtain corresponding brightness data; adjusting exposure time when the brightness data do not conform to a preset value to regain a second image after adjusting the exposure time; and combining the first image and the second image into a frame image. In the method, brightness is high or low when the exposure time is too long or short, and local detail loss caused by excessive or insufficient single exposure is compensated by combining the images formed in different exposure time into the frame image.
Description
Technical field
The present invention relates to field of medical instruments, particularly a kind of formation method and system.
Background technology
Electronic gastroscope is a kind of widely used medical examination apparatus, wherein, electronic gastroscope mainly is comprised of gastroscope, image processor, light source and monitor, outside light source is transmitted in the subject chamber by optical fiber transmission, the imageing sensor of scope front end receives the light of body cavity reflection and is converted into the signal of telecommunication, transmit signals to the image processor part by wire again, image processor to the data of transducer output gather, the series of computation such as color transformed processes, produce at last on the screen that vision signal is presented at monitor.
an important process parameter of imageing sensor is the time for exposure, it affects the bright-dark degree of image, it is that brightness according to present image judges whether over-exposed or under-exposed that the exposure of prior art is controlled, if over-exposed reduce time for exposure of next frame image, reduce image brightness, otherwise, increase the time for exposure of next frame image, improve image brightness, wherein, in image, the luminance difference of highlighted part and low light part is apart from larger, a suitable time for exposure can not be arranged, make highlighted and low light part show simultaneously clear, and, in the application of reality, demonstration due to conditions such as the inhomogeneities that is subject to light source and intensities of illumination, the dynamic range that is observed thing is larger, showing relatively can be over-exposed near light source or the stronger part of reflection in image, show partially bright, and can be under-exposed away from light source or the weak part of reflection, show partially dark, both of these case all can cause the loss of image detail.
In prior art, over-exposed part can only be adjusted to exposure normal, but in original image, partially dark parts of fine festival-gathering is lost more; Or it is normal that under-exposure partly is adjusted to exposure, but in original image partially highlights minute details can lose manyly, still, these situations all can lose a lot of important image detail informations, have reduced user's correct judgement rate.
Summary of the invention
The invention provides a kind of imaging technique and system, regulate the time for exposure with prior art and can lose a lot of important image detail informations to solve, thereby affect the problem of user's correct judgement rate.
Concrete technical scheme is as follows:
A kind of formation method, described method comprises:
Receive the light signal of measured object reflection, and described light signal is converted to the signal of telecommunication;
Convert the described signal of telecommunication to luminance signal, and generate accordingly image for the first time;
Data in described image are for the first time processed, obtained corresponding brightness data;
When described brightness data does not meet preset value, adjust time for exposure length;
Again obtain the image for the second time of adjusting after the time for exposure;
With described image for the first time and the synthetic two field picture of described image for the second time.
Preferably, also comprise:
A described two field picture is shown.
Preferably, described when described brightness data does not meet preset value, the process of adjusting time for exposure length comprises:
Judge that whether described brightness data surpasses preset value, if so, the time for exposure of described current operation long, correspondingly reduce the time for exposure, if not, the time for exposure of described current operation too short, increase the time for exposure accordingly.
Preferably, described process with described image for the first time and the synthetic two field picture of described image for the second time comprises:
With described image for the first time and described image for the second time by the synthetic two field picture of the algorithm of weighted superposition.
Preferably, also comprise:
The described image for the first time that generates is preserved.
Preferably, the described process that converts the described signal of telecommunication to luminance signal comprises:
The described signal of telecommunication through amplification, filtering, sampling, analog-to-digital conversion and colour space transformation, is generated luminance signal.
A kind of imaging device, described device comprises: imageing sensor, the first data acquisition unit, data processor, driver, the second data acquisition unit and image synthesizer;
Wherein, described imageing sensor is used for, and receives the light signal of measured object reflection, and described light signal is converted to the signal of telecommunication;
Described the first data acquisition unit is connected with described imageing sensor, is used for converting the described signal of telecommunication to luminance signal, and generates accordingly image for the first time;
Described data processor is connected with described the first data acquisition unit, is used for the data of described image are for the first time processed, and obtains corresponding brightness data;
Described driver is connected with described imageing sensor with described data processor respectively, is used for when described brightness data does not meet preset value, drives described imageing sensor and adjusts time for exposure length;
Described the second data acquisition unit is connected with described imageing sensor, and be used for adjusting the signal of telecommunication that described imageing sensor obtains after the time for exposure and convert luminance signal to, and generation image for the second time accordingly;
Described image synthesizer is connected with described the second data acquisition unit with described the first data acquisition unit respectively, is used for described image for the second time and described image are for the first time synthesized a two field picture.
Preferably, also comprise: display;
Described display is connected with described image synthesizer, is used for showing a described synthetic two field picture.
Preferably, also comprise: buffer;
Described buffer is connected with described data acquisition unit, is used for preserving described image for the first time.
as can be seen from the above technical solutions, a kind of formation method and the system that provide in the present invention, described method is applied in described system, described method comprises: the light signal that receives the measured object reflection, and described light signal is converted to the signal of telecommunication, convert the described signal of telecommunication to luminance signal, and generate accordingly image for the first time, data in image are for the first time processed, obtain corresponding brightness data, when described brightness data does not meet preset value, adjust time for exposure length, again obtain the image for the second time of adjusting after the time for exposure, with described image for the first time and the synthetic two field picture of described image for the second time, in described method, when the time for exposure occurring when long or too short, partially bright or partially dark situation can appear, in described method, by the synthetic two field picture of the image that different exposure time is formed, made up single exposure excessively or the under-exposed local detail loss that causes.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in invention or description of the Prior Art, apparently, the accompanying drawing that the following describes is only some embodiment that put down in writing in the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the disclosed a kind of formation method schematic flow sheet of the embodiment of the present invention one;
Fig. 2 is the disclosed a kind of formation method schematic flow sheet of the embodiment of the present invention two;
Fig. 3 is the disclosed a kind of imaging device structural representation of the embodiment of the present invention three;
Fig. 4 is the disclosed a kind of imaging device structural representation of the embodiment of the present invention four;
Fig. 5 is the disclosed a kind of imaging device structural representation of the embodiment of the present invention five.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to protection scope of the present invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the present invention one discloses a kind of formation method, and is shown in Figure 1, and described method is applied in the electronic gastroscope imaging, and described method comprises:
Step S101: receive the light signal of measured object reflection, and described light signal is converted to the signal of telecommunication;
Wherein, outside light source arrives in the measured object body cavity by fiber optic conduction, shines described measured object body cavity, and can receive the light signal of measured object reflection this moment;
Step S102: convert the described signal of telecommunication to luminance signal, and generate accordingly image for the first time;
Wherein, the described signal of telecommunication can be processed through a series of signal, convert luminance signal to, and generates accordingly image for the first time;
Step S103: the data in image are for the first time processed, obtained corresponding brightness data;
Wherein, the brightness data in step S103 can form a Nogata distribution map, can facilitate like this Luminance Distribution in user's observed image;
Step S104: when described brightness data does not meet preset value, adjust time for exposure length;
Wherein, for the setting of preset value, can arrange according to user's needs, or by gathering a series of image, and gather the mean value that bright spot distributes from view data, as preset value, can be also the scope of a brightness data with this mean value;
Step S105: again obtain the image for the second time of adjusting after the time for exposure;
Wherein, after adjusting the time for exposure, receive the light signal of measured object reflection, and described light signal is converted to the signal of telecommunication, convert the described signal of telecommunication to luminance signal, and generate accordingly image for the second time;
Step S106: with described image for the first time and the synthetic two field picture of described image for the second time.
a kind of formation method is disclosed in the present embodiment, described method comprises: the light signal that receives the measured object reflection, and described light signal is converted to the signal of telecommunication, convert the described signal of telecommunication to luminance signal, and generate accordingly image for the first time, data in image are for the first time processed, obtain corresponding brightness data, when described brightness data does not meet preset value, adjust time for exposure length, again obtain the image for the second time of adjusting after the time for exposure, with described image for the first time and the synthetic two field picture of described image for the second time, in described method, by the synthetic two field picture of the image that different exposure time is formed, avoid single exposure occurring excessively or the under-exposed local detail loss that causes.
Disclose a kind of formation method in the embodiment of the present invention two, shown in Figure 2, described method comprises:
Step S201: receive the light signal of measured object reflection, and described light signal is converted to the signal of telecommunication;
Wherein, outside light source arrives in the measured object body cavity by fiber optic conduction, shines described measured object body cavity, and can receive the light signal of measured object reflection this moment;
Step S202: convert the described signal of telecommunication to luminance signal, and generate accordingly image for the first time;
Wherein, the described signal of telecommunication can be processed through a series of signal, through amplification, filtering, sampling, analog-to-digital conversion and colour space transformation, generates luminance signal that is:;
Step S203: the data in image are for the first time processed, obtained corresponding brightness data;
Wherein, the brightness data in step S203 can form a Nogata distribution map, can facilitate like this Luminance Distribution in user's observed image;
Step S204: judge that whether described brightness data surpasses preset value, if so, execution in step S205. if not, execution in step S206;
Wherein, for the setting of preset value, can arrange according to user's needs, or by gathering a series of image, and gather the mean value that bright spot distributes from view data, as preset value, can be also the scope of a brightness data with this mean value;
Step S205: the time for exposure of described current operation is long, correspondingly reduces the time for exposure;
Step S206: the time for exposure of described current operation is too short, the corresponding increase time for exposure;
Wherein, need to prove, can carry out according to following manner for reducing or increasing the time for exposure:
The time for exposure of calculating current operation is T;
And the mean flow rate Y of calculating present image brightness part
0
If Y
0＜Y
1, think that described present image is partially dark, need to increase the time for exposure, the time for exposure of next frame image is T so
1=T*Y
1/ Y
0
If Y
0＞Y
2, think that described present image is partially bright, need to reduce the time for exposure, the time for exposure of next frame image is T so
2=T*Y
2/ Y
0
If Y
1＜Y
0＜Y
2, the time for exposure is constant;
Y herein
1Span be 60～80, Y
2Span be 150～180;
Step S207: again obtain the image for the second time of adjusting after the time for exposure;
Wherein, after adjusting the time for exposure, receive the light signal of measured object reflection, and described light signal is converted to the signal of telecommunication, convert the described signal of telecommunication to luminance signal, and generate accordingly image for the second time;
Step S208: with described image for the first time and the synthetic two field picture of described image for the second time;
Wherein, with described image for the first time and described image for the second time by the synthetic two field picture of the algorithm of weighted superposition;
Step S209: a described two field picture is shown.
a kind of formation method is disclosed in the present embodiment, pass through in described method to judge whether described brightness data surpasses preset value, whether be over-exposed or expose too short if obtaining described current operation, when described brightness data surpasses preset value, the time for exposure of described current operation is long, need to reduce the time for exposure accordingly, when described brightness data does not surpass preset value, the time for exposure of described current operation is too short, need accordingly to increase the time for exposure, when described brightness data just in time is exactly preset value, the time for exposure of described current operation is just in time suitable, when occur the time for exposure process or too short after, through adjusting the time for exposure, can regain image for the second time, the described image for the first time of described image for the second time and generation is passed through the synthetic two field picture of algorithm of weighted superposition, and a described two field picture is shown, user friendly like this observation directly perceived.
The embodiment of the present invention three discloses a kind of imaging device, and is shown in Figure 3, and described device comprises: imageing sensor 101, the first data acquisition unit 102, data processor 103, driver 104, the second data acquisition unit 105 and image synthesizer 106;
Described imageing sensor 101 is used for, and receives the light signal of measured object reflection, and described light signal is converted to the signal of telecommunication;
Wherein, outside light source arrives in the measured object body cavity by fiber optic conduction, shines described measured object body cavity, and can receive the light signal of measured object reflection this moment;
Described the first data acquisition unit 102 is connected with described imageing sensor 101, is used for converting the described signal of telecommunication to luminance signal, and generates accordingly image for the first time;
Wherein, the described signal of telecommunication can be processed through a series of signal, convert luminance signal to, and generates accordingly image for the first time;
Described data processor 103 is connected with described the first data acquisition unit 102, is used for the data of described image are for the first time processed, and obtains corresponding brightness data;
Wherein, described brightness data can form a Nogata distribution map, can facilitate like this Luminance Distribution in user's observed image;
Described driver 104 is connected with described imageing sensor 101 with described data processor 103 respectively, is used for when described brightness data does not meet preset value, drives described imageing sensor and adjusts time for exposure length;
Wherein, for the setting of preset value, can arrange according to user's needs, or by gathering a series of image, and gather the mean value that bright spot distributes from view data, as preset value, can be also the scope of a brightness data with this mean value;
Need to prove, can carry out according to following manner for reducing or increasing the time for exposure:
The time for exposure of calculating current operation is T;
And the mean flow rate Y of calculating present image brightness part
0
If Y
0＜Y
1, think that described present image is partially dark, need to increase the time for exposure, the time for exposure of next frame image is T so
1=T*Y
1/ Y
0
If Y
0＞Y
2, think that described present image is partially bright, need to reduce the time for exposure, the time for exposure of next frame image is T so
2=T*Y
2/ Y
0
If Y
1＜Y
0＜Y
2, the time for exposure is constant;
Y herein
1Span be 60～80, Y
2Span be 150～180.
Described driver 104 can produce the needed vertical signal of described imageing sensor 101, horizontal signal and these clock signals of exposure control signal, and wherein, described vertical signal and horizontal signal be capable signal and column signal namely, produces the pixel value of image;
Described the second data acquisition unit 105 is connected with described imageing sensor 101, and be used for adjusting the signal of telecommunication that described imageing sensor 101 obtains after the time for exposure and convert luminance signal to, and generation image for the second time accordingly;
Wherein, described the first data acquisition unit 102 can be all a data collector with described the second data acquisition unit 105, so just can reduce the volume of described imaging device, and can reduce the cost of making described imaging device;
Described image synthesizer 106 is connected with described the second data acquisition unit 105 with described the first data acquisition unit 102 respectively, is used for described image for the second time and described image are for the first time synthesized a two field picture;
Wherein, with described image for the first time and described image for the second time by the synthetic two field picture of the algorithm of weighted superposition.
the present embodiment discloses a kind of imaging device, described device comprises: imageing sensor, the first data acquisition unit, data processor, driver, the second data acquisition unit and image synthesizer, wherein, described imageing sensor receives the light signal of measured object reflection, and described light signal is converted to the signal of telecommunication, described the first data acquisition unit is connected with described imageing sensor, be used for the described signal of telecommunication is converted to luminance signal, and generate accordingly image for the first time, described data processor is connected with described the first data acquisition unit, be used for the data of described image are for the first time processed, obtain corresponding brightness data, described driver is connected with described imageing sensor with described data processor respectively, be used for when described brightness data does not meet preset value, drive the long time for exposure length of described imageing sensor bar, described the second data acquisition unit is connected with described imageing sensor, be used for to adjust the signal of telecommunication that described imageing sensor obtains after the time for exposure and convert luminance signal to, and generate accordingly image for the second time, described image synthesizer is connected with described the second data acquisition unit with described the first data acquisition unit respectively, be used for described image for the second time and described image are for the first time synthesized a two field picture, in described device, by adjusting the time for exposure, obtain the image under different exposure time, these images are synthesized a two field picture, so just can avoid single exposure occurring excessively or the under-exposed local detail loss that causes.
A kind of imaging device is disclosed in the embodiment of the present invention four, shown in Figure 4, described device comprises: imageing sensor 101, the first data acquisition unit 102, data processor 103, driver 104, the second data acquisition unit 105, image synthesizer 106 and display 107;
Wherein, described imageing sensor 101, described the first data acquisition unit 102, described data processor 103, described driver 104, described the second data acquisition unit 105 and described image synthesizer 106 are consistent with described imageing sensor 101, described the first data acquisition unit 102, described data processor 103, described driver 104, described the second data acquisition unit 105 and described image synthesizer 106 in embodiment three;
Described display 107 is connected with described image synthesizer 106, is used for showing a described synthetic two field picture.
a kind of imaging device is disclosed in the embodiment of the present invention, described device comprises: imageing sensor, the first data acquisition unit, data processor, driver, the second data acquisition unit, image synthesizer and display, wherein, described imageing sensor, described the first data acquisition unit, described data processor, described driver, described imageing sensor in described the second data acquisition unit and described image synthesizer and embodiment three, described the first data acquisition unit, described data processor, described driver, described the second data acquisition unit is consistent with described image synthesizer, described display is that a described synthetic two field picture is shown, facilitated like this user directly to observe the image information of generation.
A kind of imaging device is disclosed in the embodiment of the present invention five, shown in Figure 5, described device comprises: imageing sensor 101, the first data acquisition unit 102, data processor 103, driver 104, the second data acquisition unit 105, image synthesizer 106, display 107 and buffer 108;
Wherein, described imageing sensor 101, described the first data acquisition unit 102, described data processor 103, described driver 104, described the second data acquisition unit 105, described image synthesizer 106 and described display 107 are consistent with described imageing sensor 101, described the first data acquisition unit 102, described data processor 103, described driver 104, described the second data acquisition unit 105, described image synthesizer 106 and described display 107;
Described buffer 108 is connected with described image synthesizer 106 with described the first data acquisition unit 102, described the second data acquisition unit 105 respectively, is used for preserving described image for the first time.
the present embodiment discloses a kind of imaging device, and described device comprises: imageing sensor, the first data acquisition unit, data processor, driver, the second data acquisition unit, image synthesizer, display and buffer, wherein, described imageing sensor, described the first data acquisition unit, described data processor, described driver, described the second data acquisition unit, described imageing sensor in described image synthesizer and described display and embodiment three, described the first data acquisition unit, described data processor, described driver, described the second data acquisition unit, described image synthesizer is consistent with described display, described buffer respectively with described the first data acquisition unit, described the second data acquisition unit is connected with described image synthesizer, be used for preserving described image for the first time, it is basic that the image for the first time of buffer memory can be used as a last synthetic two field picture historical data, when mistake occurring, can directly call the described image for the first time of buffer memory, user friendly historical data is searched.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.For the disclosed device of embodiment, because it is corresponding with the disclosed method of embodiment, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment is apparent to those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wide region consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a formation method, is characterized in that, described method comprises:
Receive the light signal of measured object reflection, and described light signal is converted to the signal of telecommunication;
Convert the described signal of telecommunication to luminance signal, and generate accordingly image for the first time;
Data in described image are for the first time processed, obtained corresponding brightness data;
When described brightness data does not meet preset value, adjust time for exposure length;
Again obtain the image for the second time of adjusting after the time for exposure;
With described image for the first time and the synthetic two field picture of described image for the second time.
2. method according to claim 1, is characterized in that, also comprises:
A described two field picture is shown.
3. method according to claim 1, is characterized in that, and is described when described brightness data does not meet preset value, and the process of adjusting time for exposure length comprises:
Judge that whether described brightness data surpasses preset value, if so, the time for exposure of described current operation long, correspondingly reduce the time for exposure, if not, the time for exposure of described current operation too short, increase the time for exposure accordingly.
4. method according to claim 1, is characterized in that, described process with described image for the first time and the synthetic two field picture of described image for the second time comprises:
With described image for the first time and described image for the second time by the synthetic two field picture of the algorithm of weighted superposition.
5. method according to claim 1, is characterized in that, also comprises:
The described image for the first time that generates is preserved.
6. method according to claim 1, is characterized in that, the described process that converts the described signal of telecommunication to luminance signal comprises:
The described signal of telecommunication through amplification, filtering, sampling, analog-to-digital conversion and colour space transformation, is generated luminance signal.
7. an imaging device, is characterized in that, described device comprises: imageing sensor, the first data acquisition unit, data processor, driver, the second data acquisition unit and image synthesizer;
Wherein, described imageing sensor is used for, and receives the light signal of measured object reflection, and described light signal is converted to the signal of telecommunication;
Described the first data acquisition unit is connected with described imageing sensor, is used for converting the described signal of telecommunication to luminance signal, and generates accordingly image for the first time;
Described data processor is connected with described the first data acquisition unit, is used for the data of described image are for the first time processed, and obtains corresponding brightness data;
Described driver is connected with described imageing sensor with described data processor respectively, is used for when described brightness data does not meet preset value, drives described imageing sensor and adjusts time for exposure length;
Described the second data acquisition unit is connected with described imageing sensor, and be used for adjusting the signal of telecommunication that described imageing sensor obtains after the time for exposure and convert luminance signal to, and generation image for the second time accordingly;
Described image synthesizer is connected with described the second data acquisition unit with described the first data acquisition unit respectively, is used for described image for the second time and described image are for the first time synthesized a two field picture.
8. device according to claim 7, is characterized in that, also comprises: display;
Described display is connected with described image synthesizer, is used for showing a described synthetic two field picture.
9. device according to claim 7, is characterized in that, also comprises: buffer;
Described buffer is connected with described data acquisition unit, is used for preserving described image for the first time.
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| CN109389561A (en) * | 2018-09-28 | 2019-02-26 | 维沃移动通信有限公司 | A kind of imaging method and device |
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