CN105392011A - Method for balancing colors of different video decoders - Google Patents
Method for balancing colors of different video decoders Download PDFInfo
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- CN105392011A CN105392011A CN201510744264.2A CN201510744264A CN105392011A CN 105392011 A CN105392011 A CN 105392011A CN 201510744264 A CN201510744264 A CN 201510744264A CN 105392011 A CN105392011 A CN 105392011A
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Abstract
The invention relates to the technical field of communication, especially to a method for balancing colors of different video decoders. Disclosed in the invention is a method for balancing colors of different video decoders. At least two video decoders are adjusted. According to the invention, a mapping relation with internal adjustable values of video decoders is established by using an externally adjustable level and a relation function is formed; changing amplitudes of image color adjustment by a user are determined; and the changing amplitude of one video decoder is used as a basis and mapping relations of other video decoders are constrained and established. Therefore, when a user carries out image color adjustment actually, color effects represented by different video decoders are consistent and the changing amplitudes are consistent, so that an effect of dynamic balancing among different video decoder chips can be realized and thus the user experience in video application is improved.
Description
Technical field
The invention belongs to communication technical field, relate to a kind of method balancing different video decoder color particularly.
Background technology
In Video Applications, general pattern input flow process is: first camera is converted to CVBS analog signal light signal and delivers in Video Decoder (hereinafter referred to as " A/D chip "); Then A/D chip transfers digital signal to analog signal sampling with after quantizing, and delivers in system with the form of BT656; Finally processed by the signal of system to BT656, extract effective video signal and form raw image data.In this process, as regulated the color effect of image, such as brightness, contrast, saturation, tone etc., can directly be adjusted by A/D chip.
Along with the variation of video requirement, the video channel of needs gets more and more, and due to the restriction of some CPU, may need to use different A/D chip to obtain video data, and then unification shows.But because different A/D chip structures is inconsistent, cause color image effect also inconsistent, in order to the consistency of overall display frame, both color effects must be transferred to unanimously.Simultaneously when the dynamic adjustments that external condition triggers, the display effect change of whole picture also must be consistent, change speed can not be caused to differ, or the effect of change is different because of different AD, thus make overall picture unbalanced, inharmonious, affect visual experience.
Summary of the invention
The object of the invention is as solving the problem and providing a kind of method balancing different video decoder color, make user when carrying out actual image color and regulating, the color effect that different Video Decoders is cashed out is consistent, and amplitude of variation is also consistent, reaches the effect of dynamic equilibrium between different video decoder chip.
For this reason, the invention discloses a kind of method balancing different video decoder color, at least two Video Decoders are regulated, comprises the steps:
A1: get any one Video Decoder, set the external adjustable levels scope of element to be regulated in the adjustment of its image color, set up the mapping relations of the internal adjustable scope of this element to be regulated of this external adjustable levels scope and this Video Decoder, obtain its relation function;
A2: the respective mapping relations setting up the internal adjustable scope of this element to be regulated of this external adjustable levels scope and other Video Decoder, obtains its respective relation function;
A3: when regulating this external adjustable levels to carry out this element adjustment to be regulated, use the relation function of its correspondence to try to achieve the internal adjustable value of its correspondence according to different Video Decoders, and this internal adjustable value is set to the adjustment carrying out this element to be regulated in corresponding Video Decoder.
Further, in described image color adjustment, element to be regulated comprises at least one in brightness, contrast, saturation and tone.
Further, described mapping relations are mapping relations one by one.
Further, described relation function is linear relationship function.
Further, in described steps A 1, external adjustable levels scope is 0 ~ M, and the internal adjustable scope 0 ~ N of element to be regulated, its relation function is
wherein y is external adjustable levels, and x is the internal adjustable value of element to be regulated.
Further, the concrete grammar of described steps A 2 is: find the internal adjustable value that other Video Decoder at least two mates with this external adjustable levels, then draws its linear relationship function.
Advantageous Effects of the present invention:
The present invention utilizes external adjustable grade to set up the mapping relations of following Video Decoder internal adjustable value, and form relation function, determine that user carries out the amplitude of variation of image color adjustment, and based on the amplitude of variation of one of them Video Decoder, retrain and set up the mapping relations of other Video Decoders, make user when carrying out actual image color and regulating, the color effect that different Video Decoders is cashed out is consistent, and amplitude of variation is also consistent, reach the effect of dynamic equilibrium between different video decoder chip, improve the Consumer's Experience in Video Applications.
Accompanying drawing explanation
Fig. 1 is the flow chart of the embodiment of the present invention;
Fig. 2 is the brightness mapping relations figure of the AD1 chip of the embodiment of the present invention;
Fig. 3 is the brightness mapping relations figure of the AD2 chip of the embodiment of the present invention.
Embodiment
Now the present invention is further described with embodiment by reference to the accompanying drawings.
As shown in Figure 1, a kind of method balancing different video decoder color, regulates at least two Video Decoders, comprises the steps:
A1: get any one Video Decoder, set the external adjustable levels scope of element to be regulated in the adjustment of its image color, set up the mapping relations of the internal adjustable scope of this element to be regulated of this external adjustable levels scope and this Video Decoder, obtain its relation function.
In this specific embodiment, the mapping relations of the internal adjustable scope of this external adjustable levels scope and this element to be regulated are mapping relations one by one, and its relation function is linear relationship function.
A2: the respective mapping relations setting up the internal adjustable scope of this element to be regulated of this external adjustable levels scope and other Video Decoder, obtains its respective relation function.
In this specific embodiment, the respective mapping relations of the internal adjustable scope of this element to be regulated of this external adjustable levels scope and other Video Decoder are mapping relations one by one, obtain its separately relation function be linear function.Concrete method for building up is: find out the internal adjustable value that other Video Decoder at least two mates with this external adjustable levels, then according to the external adjustable levels of these internal adjustable values with its correspondence, obtains its linear relationship function.
A3: when user carries out this element adjustment to be regulated, this external adjustable levels of direct adjustment, then use the relation function of its correspondence to try to achieve the internal adjustable value of its correspondence according to different Video Decoders, and this internal adjustable value is set to the adjustment carrying out this element to be regulated in corresponding Video Decoder.So just can make under same regulative mode, the color effect that different Video Decoders shows is consistent, and its amplitude of variation is also consistent, reaches the object of the dissimilar Video Decoder color of balance.
In the image color of video regulates, element to be regulated comprises brightness, contrast, saturation and tone etc.For brightness regulation, the present invention will be described below; Other regulate the implementation of element identical with it as contrast, saturation and tone etc., no longer repeat specification.
First, get an A/D chip AD1, when carrying out brightness regulation, the scope of the adjustable value (internal adjustable value) of AD1 chip internal brightness register is 0 ~ 255.External adjustable grade is 0 ~ 100, namely user interface shows as the adjustable extent of 100 grades.In order to scope be 0 ~ 255 value with 0 ~ 100 grade show, must set up mapping relations, that is, when grade is adjusted to 0, the adjustable value of AD1 chip internal brightness register is minimum 0; When grade is adjusted to middle 50, the adjustable value of AD1 chip internal brightness register is 127; When grade be adjusted to the highest 100 time, the adjustable value of AD1 chip internal brightness register is the highest by 255.These mapping relations as shown in Figure 2.
Wherein Y-axis represents external adjustable levels, namely the grade of user adjustable 0 ~ 100.External adjustable levels is used for representing the performance value of brightness, and external adjustable levels is higher, and the brightness performance in the color effect of real image is brighter.X-axis represents the adjustable value of AD1 chip internal brightness register, is 0 ~ 255.Linear relationship function corresponding to these mapping relations is:
Relation function (1) illustrates the mapping relations being adjusted to AD1 chip internal actual value from actual user, determines the adjustment amplitude of variation of user with this.Amplitude of variation refers to user and often regulates a grade, the change of intrinsic brilliance.
Based on the amplitude of variation of AD1 chip, other A/D chip amplitude of variation also must meet the amplitude of variation of AD1 chip, and the change that could reach each different A/D chip like this when carrying out the dynamic conditioning of image color effect is identical, makes final performance consistent.
Because AD1 chip has established a fixing external adjustable levels scope, in order to make the AD2 chip that newly adds consistent with the scope that AD1 chip changes, AD2 chip must find at least 2 points that can get up with AD1 chip coupling, and sets up function mode with this.Such as first point is: when the external adjustable levels of AD2 chip equals the external grade-adjustable y=100 of AD1 chip (now AD2 chip brightness performance value is identical with AD1 chip brightness performance value), the x value of its correspondence is assumed to be 200, namely A (200,100) is put; Second point is: when the external adjustable levels of AD2 chip equals the external grade-adjustable y=0 of AD1 chip (now AD2 chip brightness performance value is identical with AD1 chip brightness performance value), the x value of its correspondence is assumed to be 50, namely B (50 is put, 0), the mapping relations figure of AD2 chip just can be drawn at these 2, as shown in Figure 3 by A, B.
As seen from Figure 3, in the mapping relations of the AD2 chip drawn based on the amplitude of variation of AD1 chip, when brightness degree is from 0 ~ 100 change, the adjustable value change of the brightness register of AD2 chip internal is not from 0 ~ 255, but from 50 ~ 200; That is the change of the brightness register of AD2 chip internal from 50 ~ 200 just can meet the amplitude of variation of AD1 chip.The linear relationship function obtaining AD2 chip is thus:
By the above-mentioned function of simultaneous (1) sum functions (2), be (121,47) after the crosspoint that can obtain both rounds, on this aspect, AD1 chip shows consistent with the brightness of AD2 chip.In addition, the X value that other same illuminometer present worth grade Y meeting correspondence two is different, and corresponding with the linear relationship function of respective A/D chip.
After above-mentioned process, when user carries out actual brightness adjustment, only need directly to adjust external adjustable levels, namely y value, then uses the relation function of its correspondence to try to achieve the x value of its correspondence according to different A/D chip, and x value is set in corresponding A/D chip, so just can make under same regulative mode, the color effect that different A/D chip shows is consistent, and its amplitude of variation is also consistent, reaches the object of the dissimilar Video Decoder color of balance.
If continue to access new A/D chip again, then obtain its corresponding relation function in the same way, and simultaneous is in above-mentioned group of functions, carries out synergic adjustment.
Same, for the other types that color effect regulates, such as colourity, saturation, contrast etc., be also similar, according to respective characteristic, set up mapping graph and relation function in an identical manner, and carry out synergic adjustment.
Although specifically show in conjunction with preferred embodiment and describe the present invention; but those skilled in the art should be understood that; not departing from the spirit and scope of the present invention that appended claims limits; can make a variety of changes the present invention in the form and details, be protection scope of the present invention.
Claims (6)
1. balance a method for different video decoder color, at least two Video Decoders are regulated, it is characterized in that, comprise the steps:
A1: get any one Video Decoder, set the external adjustable levels scope of element to be regulated in the adjustment of its image color, set up the mapping relations of the internal adjustable scope of this element to be regulated of this external adjustable levels scope and this Video Decoder, obtain its relation function;
A2: the respective mapping relations setting up the internal adjustable scope of this element to be regulated of this external adjustable levels scope and other Video Decoder, obtains its respective relation function;
A3: when regulating this external adjustable levels to carry out this element adjustment to be regulated, use the relation function of its correspondence to try to achieve the internal adjustable value of its correspondence according to different Video Decoders, and this internal adjustable value is set to the adjustment carrying out this element to be regulated in corresponding Video Decoder.
2. the method for balance different video decoder color according to claim 1, is characterized in that: during described image color regulates, element to be regulated comprises at least one in brightness, contrast, saturation and tone.
3. the method for balance different video decoder color according to claim 1, is characterized in that: described mapping relations are mapping relations one by one.
4. the method for the balance different video decoder color according to claim 1 or 3, is characterized in that: described relation function is linear relationship function.
5. the method for balance different video decoder color according to claim 4, it is characterized in that: in described steps A 1, external adjustable levels scope is 0 ~ M, and the internal adjustable scope 0 ~ N of element to be regulated, its relation function is
wherein y is external adjustable levels, and x is the internal adjustable value of element to be regulated.
6. the method for balance different video decoder color according to claim 4, it is characterized in that: the concrete grammar of described steps A 2 is: find the internal adjustable value that other Video Decoder at least two mates with this external adjustable levels, then draw its linear relationship function.
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| EP0157964B1 (en) * | 1984-03-29 | 1988-10-19 | Nippon Furnace KOGYO KAISHA LTD. | Apparatus for visually displaying fluid density in fluid flow model |
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