CN103686145A - Method and device for determining image quality - Google Patents
Method and device for determining image quality Download PDFInfo
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- CN103686145A CN103686145A CN201310573238.9A CN201310573238A CN103686145A CN 103686145 A CN103686145 A CN 103686145A CN 201310573238 A CN201310573238 A CN 201310573238A CN 103686145 A CN103686145 A CN 103686145A
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Abstract
The embodiment of the invention provides a method and device for determining an image quality, relates to the image field, and can determine a light source chromaticity parameter corresponding to an image color rendition quality with an evaluation value of a viewer, wherein the evaluation value is higher than a preset value. The method comprises the following steps: for each video segment, evaluation of the image quality by the viewer is obtained, wherein the video segment is captured in a preset light source chromaticity parameter condition; and according to the evaluation, the light source chromaticity parameter corresponding to the video segment with the evaluation value higher than the preset value by the viewer is determined. The method and device for determining the image quality is used to determine the evaluation of the viewer on the image quality.
Description
Technical field
The present invention relates to image field, relate in particular to a kind of method and apparatus of definite picture quality.
Background technology
In competitive sports are relayed, the Illuminant chromaticity parameter of stadiums (comprising colour temperature, color rendering index etc.) is related to the effect of television relay image color reduction.In order to guarantee the effect of television relay image color reduction, existing standard has proposed requirement to the Illuminant chromaticity parameter of stadiums illumination both at home and abroad.For example, the standard of taking as the leading factor with International Football Union, U.S. professional basketball alliance, correlated colour temperature Tc >=the 4000K of venue lighting source when high definition TV is carried out in requirement, color rendering index Ra >=65, Er Yi International Track and Field Association is the standard of representative, the correlated colour temperature Tc>5500K of the lighting source of venue when high definition TV is carried out in requirement, color rendering index Ra >=90.
Visible, the standard of each family is not quite similar, but, in prior art, do not provide any scheme for checking which kind of Illuminant chromaticity parameter setting of which kind of standard more reasonable, cause obtaining the corresponding Illuminant chromaticity parameter of optimum television relay image color reduction effect.
Summary of the invention
Embodiments of the invention provide a kind of method and apparatus of definite picture quality, can evaluate according to beholder, and the evaluation of determining beholder is higher than the image color of the preset value corresponding Illuminant chromaticity parameter of proper mass also.
First aspect, provides a kind of method of definite picture quality, comprising:
For each video-frequency band, obtain the evaluation of beholder to the picture quality of described video-frequency band, wherein, described video-frequency band is to take under default Illuminant chromaticity Parameter Conditions;
According to described evaluation, determine that beholder's evaluation is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of preset value.
In conjunction with first aspect, in the possible implementation of the first of first aspect, described according to described evaluation, the evaluation of determining beholder comprises higher than the corresponding Illuminant chromaticity parameter of video-frequency band of preset value:
Calculate the mean value of the described suffered evaluation of each video-frequency band, determine that mean value is greater than the video-frequency band of preset value, the evaluation that the corresponding Illuminant chromaticity parameter of described video-frequency band is beholder is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of described preset value.
In conjunction with the possible implementation of the first of first aspect, in the possible implementation of the second of first aspect, before the mean value of the suffered evaluation of each video-frequency band described in described calculating, described method also comprises:
Described evaluation is carried out to digitlization, obtain described beholder for the scoring of described video-frequency band.
In conjunction with the possible implementation of the second of first aspect, in the third possible implementation of first aspect, described scoring comprises invalid scoring and effectively scoring, and after described evaluation is carried out to digitlization, described method also comprises:
Filter out described beholder's invalid scoring;
Described in described calculating, the mean value of the suffered evaluation of each video-frequency band comprises: the mean value that calculates the effective scoring in described each video-frequency band.
In conjunction with first aspect, in the 4th kind of possible implementation of first aspect, described obtain the evaluation of beholder for the picture quality of described video-frequency band before, described method also comprises:
Receive beholder's log-on message;
According to described log-on message, described beholder is registered;
The described beholder of obtaining comprises for the evaluation of the picture quality of described video-frequency band:
In the situation that beholder registers, obtain described beholder for the evaluation of the picture quality of described video-frequency band.
In conjunction with the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation of first aspect, described in the situation that beholder registers, obtain described beholder and comprise for the evaluation of the picture quality of described video-frequency band:
In the situation that beholder registers, determine whether described beholder had evaluated described video-frequency band;
If described beholder not yet evaluated described video-frequency band, obtain described beholder for the evaluation of the picture quality of described video-frequency band.
Second aspect, provides a kind of device of definite picture quality, comprising:
Acquiring unit, for obtaining the evaluation of beholder to the picture quality of each video-frequency band, wherein, described video-frequency band is to take under default Illuminant chromaticity Parameter Conditions;
Determining unit, is connected with described acquiring unit, for the evaluation of obtaining according to described acquiring unit, determines that beholder's evaluation is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of preset value.
In conjunction with second aspect, in the possible implementation of the first of second aspect, described determining unit specifically for:
Calculate the mean value of the described suffered evaluation of each video-frequency band; Determine that mean value is greater than the video-frequency band of preset value, the evaluation that the corresponding Illuminant chromaticity parameter of described video-frequency band is beholder is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of described preset value.
In conjunction with the possible implementation of the first of second aspect, in the possible implementation of the second of second aspect, described device also comprises:
Digital unit, be connected with described acquiring unit, before calculating the mean value of the described suffered evaluation of each video-frequency band in described determining unit, digitlization is carried out in the evaluation that described acquiring unit is obtained, and obtains described beholder for the scoring of described video-frequency band.
In conjunction with the possible implementation of the second of second aspect, in the third possible implementation of second aspect, described device also comprises:
Filter element, be connected with described digital unit, for after described digital unit carries out digitlization to described evaluation, filter out described beholder's invalid scoring, wherein, described invalid scoring is contained in the scoring of described beholder for described video-frequency band, and described beholder comprises invalid scoring and effectively scoring for the scoring of described video-frequency band;
Described determining unit specifically for:
Calculate the mean value of the effective scoring in described each video-frequency band.
In conjunction with second aspect, in the 4th kind of possible implementation of second aspect, described device also comprises:
Registering unit, is connected with described acquiring unit, for receiving beholder's log-on message; According to described log-on message, described beholder is registered;
Described acquiring unit specifically for:
In the situation that beholder registers, obtain described beholder for the evaluation of the picture quality of described video-frequency band.
In conjunction with the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation of second aspect, described acquiring unit specifically for:
In the situation that beholder registers, determine whether described beholder had evaluated described video-frequency band;
If described beholder not yet evaluated described video-frequency band, obtain described beholder for the evaluation of the picture quality of described video-frequency band.
In embodiments of the present invention, a plurality of video-frequency bands that video-frequency band is taken under default, different Illuminant chromaticity Parameter Conditions.By obtaining beholder for the evaluation of the video-frequency band of taking under different Illuminant chromaticity Parameter Conditions, can determine that under different Illuminant chromaticity Parameter Conditions, capture video section is subject to beholder's degree of recognition.According to favorable comment in described evaluation or the poor quantitative relation of commenting, can determine and be subject to beholder's evaluation higher than video-frequency band and the corresponding Illuminant chromaticity parameter thereof of preset value.Because described evaluation is that the quality that beholder is directed to video image is sent, it is representing that beholder is for the degree of recognition of video image quality, also representing that beholder is for the image color degree of recognition of proper mass also simultaneously, therefore, if determined, be subject to beholder's evaluation higher than video-frequency band and the corresponding Illuminant chromaticity parameter thereof of preset value, the evaluation of also just having determined beholder is higher than the image color of the preset value corresponding Illuminant chromaticity parameter of proper mass also.
Accompanying drawing explanation
Fig. 1 is the flow chart of an embodiment of the present invention's method of determining picture quality;
Fig. 2 is the flow chart of a specific embodiment of the present invention's method of determining picture quality;
Fig. 3 is the structured flowchart of an embodiment of the present invention's device of determining picture quality.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme of the embodiment of the present invention is 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, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
Fig. 1 is the flow chart of an embodiment of the present invention's method of determining picture quality.The method of definite picture quality that the embodiment of the present invention provides can be implemented by a class device that possesses control processing capacity, is called control processing unit, and described device can be for example server, notebook computer etc.As shown in Figure 1, the present invention determines that the method for picture quality comprises:
S11, for each video-frequency band, obtains the evaluation of beholder to the picture quality of described video-frequency band, and wherein, described video-frequency band is to take under default Illuminant chromaticity Parameter Conditions.
In embodiments of the present invention, described beholder can be a plurality of beholders that are positioned at diverse location.Described beholder refers to that for the evaluation of the picture quality of described video-frequency band described beholder is for the degree of recognition of the picture quality of described video-frequency band, and described evaluation can adopt the hierarchical approaches such as excellent, good, general, poor, poor, also can adopt the mode of scoring.
Obtain described beholder to the evaluation of the picture quality of described video-frequency band before, beholder inputs log-on message on the electronic equipment with video playback ability, described information can comprise the basic personal information such as age, occupation, sex.Described electronic equipment is specifically as follows the electronic equipment that computer monitor, television display screen, mobile phone display screen etc. have video playback ability.Described log-on message specifically can be inputted by user interface by described beholder, and wherein, described user interface is controlled and produced and show on described electronic equipment by described control processing unit.Described beholder, input after described information, described control processing unit receives the described information sending over from described electronic equipment, according to described information, described beholder is registered.In addition, also can obtain other information that can identify electronic equipment for registration, described information can be for example the sequence number of electronic equipment.
After definite described beholder has registered, described control processing unit can transmit a plurality of video-frequency bands to the electronic equipment at described beholder place; Also can only transmit the relevant information of a plurality of video-frequency bands, and after described beholder selects, trigger described control processing unit and transmit selected video-frequency band.Described video-frequency band can be to take in different stadiums (corresponding different Illuminant chromaticity parameters), then be transferred to described control processing unit, by described control processing unit, preserved, like this, described control processing unit can be known every section of corresponding Illuminant chromaticity parameter of video, then, then by described video-frequency band send to described electronic equipment.In addition, described video-frequency band also can not send to described control processing unit, but by monitoring or other modes, obtains every section of corresponding Illuminant chromaticity parameter of video by described control processing unit, in this no limit.
For fear of same beholder, same video-frequency band is repeatedly evaluated, after described beholder has registered and has selected video-frequency band, described control processing unit judges whether described beholder had evaluated described video-frequency band, if described beholder not yet evaluated described video-frequency band, described control processing unit can obtain described beholder for the evaluation of the picture quality of described video-frequency band.Particularly, described beholder can select to identify oneself suitable evaluation in the user interface on described electronic equipment.Described control processing unit can receive the evaluation that described electronic equipment sends, thereby obtains described beholder for the evaluation of the picture quality of described video-frequency band.
If described beholder had evaluated described video-frequency band, preferably no longer obtain described beholder for the evaluation of described video-frequency band.Certainly, described control processing unit also can obtain described beholder again for the evaluation of described video-frequency band, but in follow-up data is processed, preferably, same beholder only can utilize once the repeatedly evaluation of same video-frequency band.It should be noted that, if beholder not yet registers, described beholder is preferably set cannot be evaluated described video-frequency band.
S12, according to described evaluation, determines that beholder's evaluation is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of preset value.
In this enforcement, preset value is the picture quality that the judges described video-frequency band standard in the acceptable scope of beholder whether.Described preset value can be for example the form of mark, in the appraisement system of ten point system, preset value can be made as to 5 minutes or 6 minutes; Also can be the form of grade, in excellent, good, general, poor, poor hierarchical system, preset value can be made as good or general.If beholder's evaluation is greater than described preset value, judge that the picture quality of described video-frequency band is in the acceptable scope of beholder; If beholder's evaluation is less than described preset value, judge that the picture quality of described video-frequency band is not in the acceptable scope of beholder.
According to step S11, described control processing unit is after obtaining the evaluation of described beholder for the picture quality of described video-frequency band, if described evaluation is the form of classification, can carry out digitlization to it, obtains described beholder for the scoring of described video-frequency band.Described beholder also can, directly with the form of scoring, evaluate the picture quality of described video-frequency band.Then, preferably described scoring is filtered, to filter out invalid scoring, wherein, due to electronic equipment or watch the impact of environment, or due to the impact of beholder's subjective factor, in all scorings, have a part and other major parts (for example 80%) beholder's the excessive scoring of effort analysis, this partial evaluation is described invalid scoring.And except described invalid scoring, other scorings in described all scorings are effective scoring.
After filtration completes, can be according to effective scoring, calculate the arithmetic mean of the scoring that each video-frequency band is subject to, wherein, same beholder only can utilize once the scoring of same video-frequency band.Like this, the described arithmetic mean calculating is the mean value that all beholders evaluate for described video-frequency band.After calculating described mean value, can more described mean value and the size of preset value.If described mean value is greater than described preset value, judge that the picture quality of described video-frequency band is in the acceptable scope of beholder; If described mean value is less than described preset value, judge that the picture quality of described video-frequency band is not in the acceptable scope of beholder.By the size of more described mean value and described preset value, can show respectively that beholder's evaluation is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of described preset value under the Illuminant chromaticity Parameter Conditions of Standard Definition Television relay and high definition TV.
Alternatively, after obtaining the evaluation of described beholder for described video-frequency band picture quality, described control processing unit can not filter described evaluation yet, but directly calculates the mean value of described evaluation.After calculating the mean value of described evaluation, by the size of more described mean value and described preset value, can show respectively that beholder's evaluation is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of described preset value under the Illuminant chromaticity Parameter Conditions of Standard Definition Television relay and high definition TV.
In embodiments of the present invention, a plurality of video-frequency bands that video-frequency band is taken under default, different Illuminant chromaticity Parameter Conditions.By obtaining beholder for the evaluation of the video-frequency band of taking under different Illuminant chromaticity Parameter Conditions, can determine that the video-frequency band of taking under different Illuminant chromaticity Parameter Conditions is subject to beholder's degree of recognition.According to favorable comment in described evaluation or the poor quantitative relation of commenting, can determine and be subject to beholder's evaluation higher than video-frequency band and the corresponding Illuminant chromaticity parameter thereof of preset value.Because described evaluation is that the quality that beholder is directed to video image is sent, it is representing that beholder is for the degree of recognition of video image quality, also representing that beholder is for the image color degree of recognition of proper mass also simultaneously, therefore, if determined, be subject to beholder's evaluation higher than video-frequency band and the corresponding Illuminant chromaticity parameter thereof of preset value, the evaluation of also just having determined beholder is higher than the image color of the preset value corresponding Illuminant chromaticity parameter of proper mass also.
For understanding better the present invention, several specific embodiments of take again are below further described the present invention as example.Also must note, below cited embodiment be a part of embodiment of the present invention, those skilled in the art, by content of the present invention, can be easy to expect other embodiment, they all within the scope of the invention.
Fig. 2 is the flow chart of a specific embodiment of the present invention's method of determining picture quality.This specific embodiment obtains the beholder of family's TV for the occasion of the evaluation of television relay picture quality for server.Electronic equipment can be specifically television set.As shown in Figure 2, the present invention determines that the method for picture quality comprises:
S21, server obtains beholder's personal information, and according to described information, described beholder is registered.
Under the occasion of family's TV, beholder, before starting to select video-frequency band, can input personal information in the user interface of television set.Described personal information can comprise the basic personal information such as age, occupation, sex.Described user interface is produced by server, and it shows on television set by described server controls.Described server is registered described beholder according to described personal information.
After described beholder inputs personal information, described server receives the described personal information that described television set sends.By adding up described personal information, can select age distribution, occupation distributes, M-F is suitable beholder as the evaluation main body of television relay picture quality, for example selecting M-F is that the beholder of 1:1 is as described evaluation main body, like this, can increase science and the reasonability of evaluation.
S22, described server controls television set shows screen display multistage video at it, wherein, described beholder can select wherein one section to watch.
Selecting suitable beholder as after evaluating main body, server gets it a plurality of video-frequency bands from floor are delivered to the television set described beholder family, wherein, described video-frequency band can be subject matter different, under different Illuminant chromaticity Parameter Conditions, take.For example, the subject matter of described video-frequency band can have football, basketball, vollyball etc.Because the television relay of different definition is different for the requirement of Illuminant chromaticity parameter, requiring that the requirement of high definition TV is relayed than Standard Definition Television is high, therefore, in order to meet the demand of different definition, two class Illuminant chromaticity parameters can be set respectively: a class is the Illuminant chromaticity parameter that Standard Definition Television is relayed, comprising multiple sets of light sources colorimetric parameter, can be for example color rendering index Ra=65 and correlated colour temperature Tc=4000K, color rendering index Ra=70 and correlated colour temperature Tc=4500K etc.; Another kind of is the Illuminant chromaticity parameter of high definition TV, can be for example color rendering index Ra=90 and correlated colour temperature Tc=5600K, color rendering index Ra=95 and correlated colour temperature Tc=6000K etc.Generally, the Illuminant chromaticity parameter of stadiums is fixed, and therefore, described different Illuminant chromaticity Parameter Conditions can obtain from different venues.Like this, described beholder just can, according to individual hobby, select suitable video-frequency band to watch in the user interface of described television set.In order to distinguish, can numbering be set for described video-frequency band.It should be noted that, beholder, when selecting video-frequency band and selected video-frequency band is evaluated, is to evaluate under the state of Illuminant chromaticity parameter of not knowing described video-frequency band.Can avoid like this beholder to provide too high or too low evaluation owing to having known in advance the height of the Illuminant chromaticity parameter of video-frequency band, having first impressions are strongest.After described beholder selects video-frequency band, described television set can send to server by the numbering of described video-frequency band, described server and then control the selected video-frequency band of described television for play beholder.Described beholder, after finishing watching one section of video-frequency band, can continue to select to play other video-frequency bands.
S23, after described beholder selects video-frequency band, described server, in conjunction with evaluating list, judges whether described beholder had evaluated described video-frequency band, if described beholder had evaluated described video-frequency band, ignores it for the evaluation of described video-frequency band; If described beholder not yet evaluated described video-frequency band, obtain it for the evaluation of described video-frequency band.
After described beholder selects video-frequency band, described server can be evaluated list by inquiry beholder, judges whether described beholder had evaluated described video-frequency band, and wherein, described evaluation list is for preserving the evaluation of beholder to described video-frequency band.If described beholder had evaluated described video-frequency band, preferably described server does not obtain described beholder for the evaluation of described video-frequency band, but remind described beholder to reselect other video-frequency bands by described user interface, evaluates.Like this, can avoid same beholder to same section of video evaluation repeatedly, improve science and the reasonability of the evaluation of obtaining.
If described beholder not yet evaluated described video-frequency band, obtain it for the evaluation of described video-frequency band.Particularly, identical watching under condition, described beholder is the subjective feeling for video-frequency band picture quality according to self, selects to identify oneself suitable evaluation in the user interface of television set.Described evaluation can adopt the hierarchical approaches such as excellent, good, general, poor, poor, also can adopt the mode of scoring.Preferably, be divided into as much as possible as required more grade, like this, can avoid causing reasonably distinguishing the difference that different beholders evaluate because minute progression is less.Described beholder, provide after evaluation, described evaluation sends described server to from described television set.
S24, described server calculates the mean value of whole evaluations that described video-frequency band is subject to.
After receiving the evaluation of described beholder for described video-frequency band, described server is first according to the difference of the Illuminant chromaticity parameter of video-frequency band, described evaluation is divided into groups, that is, described beholder is grouped together for the evaluation of the video-frequency band of same light source colorimetric parameter.Then, for the ease of computing, can carry out digitized processing to described beholder's evaluation, for example, can be 5,4,3,2,1 to excellent, good, general, poor, the other assignment of difference.
In the scoring for video-frequency band described beholder, may include the invalid scoring of fraction that obviously departs from other most of scorings, described invalid scoring may be to be caused by objective or subjective factor, may cause the unreasonable or inaccurate of evaluation, thereby, after digitized processing, need to filter out described invalid scoring.In the selection of filter algorithm, can first calculate the mean value of all scorings, then, filter out the relatively large partial evaluation of deviation average; Also can be first all scorings be arranged in order according to order from small to large, for the scoring that is positioned at two ends, if the difference between immediate scoring is larger on itself and numerical value, filter out this scoring.At this, it should be noted that, in the selection of filter algorithm, can the standard that judgement scoring obviously departs from most of scoring be set according to the concrete distribution of data, at this, do not do concrete restriction.
After filtration completes, effectively marked, can be by calculating the arithmetic mean of described effective scoring, and using the scoring for described video-frequency band as all users of this mean value.Due to the difference that different definition require, can calculate respectively the corresponding mean value of Illuminant chromaticity parameter of every group of Standard Definition Television relay and the corresponding mean value of Illuminant chromaticity parameter of every group of high definition TV.When calculating arithmetic mean, preferably, the weight coefficient that picture quality aspect expert scoring is not set is larger than General Visitors scoring, and all beholders " are made no exception ", that is, all beholders' weight coefficient is all identical.Like this, the mean value calculating more can represent the view as main TV audient's common TV spectators.Certainly, according to actual data distribution situation, also can not filter described beholder for the scoring of video-frequency band, but directly calculate the arithmetic mean of all scorings.
S25, according to described mean value, described server judges that described Illuminant chromaticity parameter is for the influence degree of the color rendition effect of television relay image, by the size of more described mean value and preset value, determines that beholder's evaluation is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of preset value.
After the mean value of the whole evaluations that are subject in the described video-frequency band of calculating, described server, according to the height of mark, judges that described Illuminant chromaticity parameter is for the influence degree of the color rendition effect of television relay image.For example, in the situation that excellent, good, general, poor, difference in step S11 are not digitized as to 5,4,3,2,1, if calculate to such an extent that the mean value of the evaluation that is subject to of video-frequency band is 5, judge under the condition of the corresponding Illuminant chromaticity parameter of this video-frequency band, the color rendition effect of television relay image is excellent; If calculate to such an extent that the mean value of the evaluation that is subject to of video-frequency band is 1, judge under the condition of the corresponding Illuminant chromaticity parameter of this video-frequency band, the color rendition effect of television relay image is for poor.With reference to step S12, set a preset value, by the size of more described mean value and described preset value, can determine that the corresponding Illuminant chromaticity parameter of which video-frequency band is in the acceptable scope of beholder.In the corresponding Illuminant chromaticity parameter of video-frequency band in definite tolerance interval, can also further determine the corresponding Illuminant chromaticity parameter of the video-frequency band Illuminant chromaticity parameter optimum for beholder evaluates of mean value maximum.For example, if the mean value of 5 sections of all videos is respectively 5,4,3,2,1, it is the highest that the corresponding Illuminant chromaticity parameter of video-frequency band that mean value is 5 (for example, color rendering index Ra=65, correlated colour temperature Tc=4000K) is that beholder evaluates.Like this, can correctly evaluate in the situation that different definition require the corresponding video image quality of Different Light colorimetric parameter.At this, it needs to be noted, as long as beholder has approved the video image quality of television relay, just can think that Illuminant chromaticity parameter can meet the also requirement of proper mass of image color in television relay.The Illuminant chromaticity parameter of finding out by said method and the image color corresponding relation of proper mass also in television relay, can provide foundation for formulating the national sector standards such as < < sports building electrical design standard > >.And, can further find out accordingly the also relation of proper mass and field lighting system energy consumption of image color, for field lighting energy saving of system consumption reduction provides foundation.
Alternatively, for the ease of data consumer's understanding, can carry out the contrary processing of digitlization to described mean value, obtain image quality level.For example, if mean value is respectively 5,4,3,2,1, carries out the contrary image quality level obtaining afterwards of processing of digitlization and be respectively excellent, good, general, poor, poor.Like this, data consumer after seeing Illuminant chromaticity parameter and corresponding image quality level thereof, the quality of the corresponding picture quality of perception light source colorimetric parameter intuitively.
In embodiments of the present invention, a plurality of video-frequency bands that video-frequency band is taken under default, different Illuminant chromaticity Parameter Conditions.After obtaining the evaluation of the video-frequency band that beholder takes under for different Illuminant chromaticity Parameter Conditions, can carry out digitlization and calculating mean value to described evaluation, obtain the mean value of the suffered evaluation of described video-frequency band.By comparing the size of mean value and preset value, can determine and be subject to beholder's evaluation higher than video-frequency band and the corresponding Illuminant chromaticity parameter thereof of preset value.Because described evaluation is that the quality that beholder is directed to video image is sent, it is representing that beholder is for the degree of recognition of video image quality, also representing that beholder is for the image color degree of recognition of proper mass also simultaneously, therefore, if determined, be subject to beholder's evaluation higher than video-frequency band and the corresponding Illuminant chromaticity parameter thereof of preset value, the evaluation of also just having determined beholder is higher than the image color of the preset value corresponding Illuminant chromaticity parameter of proper mass also.
The method of a kind of definite picture quality providing with the embodiment of the present invention is corresponding, and the embodiment of the present invention also provides a kind of device of definite picture quality.The device 30 of a kind of definite picture quality that as shown in Figure 3, the embodiment of the present invention provides comprises:
Acquiring unit 31, for obtaining the evaluation of beholder to the picture quality of each video-frequency band, wherein, described video-frequency band is to take under default Illuminant chromaticity Parameter Conditions;
Determining unit 32, is connected with acquiring unit 31, for the evaluation of obtaining according to acquiring unit 31, determines that beholder's evaluation is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of preset value.
Further, determining unit 32 specifically for:
Calculate the mean value of the described suffered evaluation of each video-frequency band; Determine that mean value is greater than the video-frequency band of preset value, the evaluation that the corresponding Illuminant chromaticity parameter of described video-frequency band is beholder is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of described preset value.
Alternatively, the device 30 of determining picture quality also comprises:
Alternatively, the device 30 of determining picture quality also comprises:
Determining unit 32 specifically for:
Calculate the mean value of the effective scoring in described each video-frequency band.
Alternatively, the device 30 of determining picture quality also comprises:
Registering unit 35, is connected with acquiring unit 31, for receiving beholder's log-on message; According to described log-on message, described beholder is registered;
Acquiring unit 31 specifically for:
In the situation that beholder registers, obtain described beholder for the evaluation of the picture quality of described video-frequency band.
Further, acquiring unit 31 specifically for:
In the situation that beholder registers, determine whether described beholder had evaluated described video-frequency band;
If described beholder not yet evaluated described video-frequency band, obtain described beholder for the evaluation of the picture quality of described video-frequency band.
In embodiments of the present invention, a plurality of video-frequency bands that video-frequency band is taken under default, different Illuminant chromaticity Parameter Conditions.By obtaining beholder for the evaluation of the video-frequency band of taking under different Illuminant chromaticity Parameter Conditions, can determine that under different Illuminant chromaticity Parameter Conditions, capture video section is subject to beholder's degree of recognition.According to favorable comment in described evaluation or the poor quantitative relation of commenting, can determine and be subject to beholder's evaluation higher than video-frequency band and the corresponding Illuminant chromaticity parameter thereof of preset value.Because described evaluation is that the quality that beholder is directed to video image is sent, it is representing that beholder is for the degree of recognition of video image quality, also representing that beholder is for the image color degree of recognition of proper mass also simultaneously, therefore, if determined, be subject to beholder's evaluation higher than video-frequency band and the corresponding Illuminant chromaticity parameter thereof of preset value, the evaluation of also just having determined beholder is higher than the image color of the preset value corresponding Illuminant chromaticity parameter of proper mass also.
Each embodiment in this specification is existing to be stressed to be described, between each embodiment identical similar part mutually referring to, each embodiment stresses is the difference with other embodiment.Especially, for device embodiment, because it is substantially similar in appearance to embodiment of the method, so describe fairly simplely, relevant part is referring to the part explanation of embodiment of the method.
It should be noted that, device embodiment described above is only schematic, the wherein said unit as separating component explanation can or can not be also physically to separate, the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in a plurality of network element.Can select according to the actual needs some or all of module wherein to realize the object of the present embodiment scheme.In addition, in device embodiment accompanying drawing provided by the invention, the annexation between module represents to have communication connection between them, specifically can be implemented as one or more communication bus or holding wire.Those of ordinary skills, in the situation that not paying creative work, are appreciated that and implement.
The possible implementation that one of ordinary skill in the art will appreciate that various aspects of the present invention or various aspects can be embodied as system, method or computer program.Therefore, the possible implementation of each aspect of the present invention or various aspects can adopt complete hardware implementation example, complete implement software example (comprising firmware, resident software etc.), or the form of the embodiment of integration software and hardware aspect, is all referred to as " circuit ", " module " or " system " here.In addition, the possible implementation of each aspect of the present invention or various aspects can adopt the form of computer program, and computer program refers to the computer readable program code being stored in computer-readable medium.
Computer-readable medium can be computer-readable signal media or computer-readable recording medium.Computer-readable recording medium is including but not limited to electronics, magnetic, optics, electromagnetism, infrared or semiconductor system, equipment or device, or aforesaid appropriately combined arbitrarily, as random access memory (RAM), read-only memory (ROM), Erasable Programmable Read Only Memory EPROM (EPROM or flash memory), optical fiber, portable read-only memory (CD-ROM).
Processor in computer reads the computer readable program code being stored in computer-readable medium, makes processor can carry out the function action of stipulating in the combination of in flow chart each step or each step; Generation is implemented in the device of the function action of stipulating in each piece of block diagram or the combination of each piece.
Computer readable program code can be completely carried out on user's computer, part is carried out on user's computer, as independent software kit, part on user's computer and part on remote computer, or on remote computer or server, carry out completely.Also should be noted that in some alternate embodiment, in flow chart, in each step or block diagram, the dated function of each piece may be not according to occurring in sequence of indicating in figure.For example, depend on related function, in fact two steps or two pieces that illustrate in succession may be executed substantially concurrently, or these pieces sometimes may be carried out with reverse order.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (12)
1. a method for definite picture quality, is characterized in that, comprising:
For each video-frequency band, obtain the evaluation of beholder to the picture quality of described video-frequency band, wherein, described video-frequency band is to take under default Illuminant chromaticity Parameter Conditions;
According to described evaluation, determine that beholder's evaluation is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of preset value.
2. method according to claim 1, is characterized in that, described according to described evaluation, and the evaluation of determining beholder comprises higher than the corresponding Illuminant chromaticity parameter of video-frequency band of preset value:
Calculate the mean value of the described suffered evaluation of each video-frequency band, determine that mean value is greater than the video-frequency band of preset value, the evaluation that the corresponding Illuminant chromaticity parameter of described video-frequency band is beholder is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of described preset value.
3. method according to claim 2, is characterized in that, before the mean value of the suffered evaluation of each video-frequency band described in described calculating, described method also comprises:
Described evaluation is carried out to digitlization, obtain described beholder for the scoring of described video-frequency band.
4. method according to claim 3, is characterized in that, wherein, described scoring comprises invalid scoring and effectively scoring, and after described evaluation is carried out to digitlization, described method also comprises:
Filter out described beholder's invalid scoring;
Described in described calculating, the mean value of the suffered evaluation of each video-frequency band comprises: the mean value that calculates the effective scoring in described each video-frequency band.
5. method according to claim 1, is characterized in that, described obtain the evaluation of beholder for the picture quality of described video-frequency band before, described method also comprises:
Receive beholder's log-on message;
According to described log-on message, described beholder is registered;
The described beholder of obtaining comprises for the evaluation of the picture quality of described video-frequency band:
In the situation that beholder registers, obtain described beholder for the evaluation of the picture quality of described video-frequency band.
6. method according to claim 5, is characterized in that, described in the situation that beholder registers, and obtains described beholder and comprises for the evaluation of the picture quality of described video-frequency band:
In the situation that beholder registers, determine whether described beholder had evaluated described video-frequency band;
If described beholder not yet evaluated described video-frequency band, obtain described beholder for the evaluation of the picture quality of described video-frequency band.
7. a device for definite picture quality, is characterized in that, comprising:
Acquiring unit, for obtaining the evaluation of beholder to the picture quality of each video-frequency band, wherein, described video-frequency band is to take under default Illuminant chromaticity Parameter Conditions;
Determining unit, is connected with described acquiring unit, for the evaluation of obtaining according to described acquiring unit, determines that beholder's evaluation is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of preset value.
8. device according to claim 7, is characterized in that,
Described determining unit specifically for:
Calculate the mean value of the described suffered evaluation of each video-frequency band; Determine that mean value is greater than the video-frequency band of preset value, the evaluation that the corresponding Illuminant chromaticity parameter of described video-frequency band is beholder is higher than the corresponding Illuminant chromaticity parameter of video-frequency band of described preset value.
9. device according to claim 8, is characterized in that, described device also comprises:
Digital unit, be connected with described acquiring unit, before calculating the mean value of the described suffered evaluation of each video-frequency band in described determining unit, digitlization is carried out in the evaluation that described acquiring unit is obtained, and obtains described beholder for the scoring of described video-frequency band.
10. device according to claim 9, is characterized in that, described device also comprises:
Filter element, be connected with described digital unit, for after described digital unit carries out digitlization to described evaluation, filter out described beholder's invalid scoring, wherein, described invalid scoring is contained in the scoring of described beholder for described video-frequency band, and described beholder comprises invalid scoring and effectively scoring for the scoring of described video-frequency band;
Described determining unit specifically for:
Calculate the mean value of the effective scoring in described each video-frequency band.
11. devices according to claim 7, is characterized in that, described device also comprises:
Registering unit, is connected with described acquiring unit, for receiving beholder's log-on message; According to described log-on message, described beholder is registered;
Described acquiring unit specifically for:
In the situation that beholder registers, obtain described beholder for the evaluation of the picture quality of described video-frequency band.
12. devices according to claim 11, is characterized in that, described acquiring unit specifically for:
In the situation that beholder registers, determine whether described beholder had evaluated described video-frequency band;
If described beholder not yet evaluated described video-frequency band, obtain described beholder for the evaluation of the picture quality of described video-frequency band.
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