CN106604025B - The measuring method and device of multiple bases color domain coverage ratio - Google Patents
The measuring method and device of multiple bases color domain coverage ratio Download PDFInfo
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- CN106604025B CN106604025B CN201611161481.XA CN201611161481A CN106604025B CN 106604025 B CN106604025 B CN 106604025B CN 201611161481 A CN201611161481 A CN 201611161481A CN 106604025 B CN106604025 B CN 106604025B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/004—Diagnosis, testing or measuring for television systems or their details for digital television systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/02—Diagnosis, testing or measuring for television systems or their details for colour television signals
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Abstract
The present invention proposes a kind of measuring method and device of multiple bases NTSC color gamut coverage rate, by the control primary coordinate for obtaining reference primary coordinate and display device color gamut with reference to colour gamut, several random points are generated in gamut map and detect the generation position of random point, if detecting, the generation position of random point is in the closed area formed with reference to the reference primary coordinate of colour gamut, then increase random point in the first count value occurred with reference to colour gamut, if detecting, the random point is also at simultaneously in the closed area of control primary coordinate composition of display device color gamut, then increase the second count value that random point occurs in display device color gamut, after random point, which generates number, reaches preset value, multiple bases NTSC color gamut coverage rate is measured according to the first obtained count value and the second count value, has versatility, dependable with function.
Description
Technical field
The present invention relates to color domain coverage ratio fields of measurement more particularly to a kind of measurement sides of multiple bases NTSC color gamut coverage rate
Method and device.
Background technology
What the number of colors that colour gamut refers to certain equipment (display screen, printing equipment or printer) and can express was formed
Range areas.Colour gamut is bigger, and the degree of a kind of color which can show is abundanter, and color is more gorgeous.
NTSC color gamut coverage rate is for weighing the size of colour gamut important indicator, current display equipment NTSC colors
The measuring method of domain coverage ratio is to measure NTSC color gamut by measuring display screen colour gamut with the overlapping gamut area with reference to colour gamut
Coverage rate is more suited to the measurement that three primary colours show equipment NTSC color gamut coverage rate, however, high-end field shows the primary colours of equipment
Number is gradually increasing, and in order to truly restore the color of nature, embodies the display details for showing equipment, is overlapped by measuring
Gamut area measures the mode of NTSC color gamut coverage rate, it is difficult to which the NTSC color gamut for measuring the more display equipment of number of primary colors covers
Lid rate.
Invention content
Based on this, the present invention proposes a kind of measuring method and device of multiple bases NTSC color gamut coverage rate, being capable of measurement base
The NTSC color gamut coverage rate of the more display equipment of chromatic number mesh.
A kind of measuring method of multiple bases NTSC color gamut coverage rate, includes the following steps：
Obtain the reference primary coordinate with reference to colour gamut；
Obtain the control primary coordinate for showing device color gamut；
It generates random point and detects the generation position of the random point；
If the generation position of random point be in reference to colour gamut reference primary coordinate form closed area in, increase with
Machine point is in the first count value occurred with reference to colour gamut；
If in the generation position of the random point closed area that the control primary coordinate in display device color gamut is formed simultaneously,
Then increase the second count value that random point occurs in display device color gamut；
If random point, which generates number, reaches preset times, multiple bases are measured according to the first count value and the second count value
NTSC color gamut coverage rate, wherein, the multiple bases NTSC color gamut coverage rate is equal to second count value divided by the first count value.
A kind of measuring device of multiple bases NTSC color gamut coverage rate, including：
With reference to primary coordinate acquisition module, for obtaining the reference primary coordinate with reference to colour gamut；
Primary coordinate acquisition module is compareed, for obtaining the control primary coordinate for showing device color gamut；
Random point generates and detection module, for generating random point and detecting the generation position of the random point；
First count value increases module, if the generation position for random point is in the reference primary coordinate structure of reference colour gamut
Into closed area in, then increase random point with reference to colour gamut occur the first count value；
Second count value increases module, if the generation position for random point is in the control base of display device color gamut simultaneously
In the closed area that chromaticity coordinates is formed, then increase the second count value that random point occurs in display device color gamut；
Multiple bases NTSC color gamut coverage measure module, if generating number for random point reaches preset times, basis
First count value and the second count value measure multiple bases NTSC color gamut coverage rate, wherein, the multiple bases NTSC color gamut
Coverage rate is equal to second count value divided by the first count value.
The measuring method and device of above-mentioned multiple bases NTSC color gamut coverage rate, obtain with reference to colour gamut reference primary coordinate with
And the control primary coordinate of display device color gamut, several random points are successively generated in gamut map and detect the random point
Generation position, if detecting, the generation position of random point is in the closed area formed with reference to the reference primary coordinate of colour gamut,
Then increase the first count value that random point occurs in reference colour gamut, the random point is also at display device color gamut simultaneously if detecting
Control primary coordinate form closed area in, then increase random point display device color gamut occur the second count value, when
After random point number reaches a certain amount of, multiple bases NTSC color gamut is measured according to the first obtained count value and the second count value and is covered
Lid rate, wherein, the multiple bases NTSC color gamut coverage rate is equal to second count value divided by the first count value.The present invention's is more
The measuring method and device of primary colours NTSC color gamut coverage rate in gamut map by generating several random points, if the production of random point
Raw position is more in the number with reference to colour gamut and display device color gamut simultaneously, then illustrates to show the NTSC color gamut covering of equipment
Rate is bigger, can measure the NTSC colors that the multiple bases including more than three primary colours, four primary or five primary colours showing equipment show equipment
Domain coverage ratio, the accurate color gamut for embodying multiple bases and showing equipment, has versatility, dependable with function.
Description of the drawings
Fig. 1 is the measuring method flow diagram of the multiple bases NTSC color gamut coverage rate in one embodiment；
Fig. 2 is the three primary colours gamut map in one embodiment；
Fig. 3 is five primary colours gamut maps in one embodiment；
Fig. 4 is the measuring device structure diagram of the multiple bases NTSC color gamut coverage rate in one embodiment.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, in one embodiment, a kind of measuring method of multiple bases NTSC color gamut coverage rate, including following step
Suddenly：
S10：Obtain the reference primary coordinate with reference to colour gamut；
S11：Obtain the control primary coordinate for showing device color gamut；
S12：Several random points are generated in the gamut map with reference to where colour gamut and display device color gamut and are detected
The generation position of the random point；
S13：If the generation position of the random point is in the closed area formed with reference to the reference primary coordinate of colour gamut,
Then increase random point in the first count value occurred with reference to colour gamut；
S14：If the generation position of the random point envelope that the control primary coordinate in display device color gamut is formed simultaneously
In closed region, then increase the second count value that random point occurs in display device color gamut；
S15：Multiple bases NTSC color gamut coverage rate is measured according to first count value and the second count value, wherein, institute
Multiple bases NTSC color gamut coverage rate is stated equal to second count value divided by the first count value.
Colour gamut is a kind of method encoded to color, refers to the summation for the color that technological system can generate, and is also referred to aobvious
The range areas that the number of colors that showing equipment (display screen, printing equipment or printer) can express is formed.Colour gamut is bigger,
The degree of a kind of color that the equipment can show is abundanter, and color is more gorgeous.
The reference colour gamut can be NTSC system reference colour gamut, and NTSC is (National Television Standards Committee) National
Agreement for standard television broadcast is transmitted and is received in the abbreviation of Television Standards Committee.NTSC system reference
Colour gamut refers to the summation of the color under NTSC standard, can be vivid for NTSC system reference each primary colours degree of colour gamut, reference by gamut map
Primary coordinate is NTSC system with reference to the apex coordinate of colour gamut planar graph.Show the color expressive ability and its colour gamut phase of equipment
It closes, directly influences perception of the user to display equipment, display device color gamut refers to the number of colors that display equipment can be shown, right
It is the apex coordinate for showing device color gamut planar graph according to primary coordinate.Such as the three primary colours colour gamut schematic diagram of Fig. 2, what solid line was formed
For triangle for display device color gamut, the triangle that dotted line is formed is NTSC system with reference to colour gamut, (xR, yR), (xG, yG) and (xB,
yB) it is red coordinate of the NTSC system with reference to colour gamut, green coordinate and blue coordinate.
The number of primary colors for showing device color gamut can be multiple, and in one embodiment, the display device color gamut is three primary colours
More than display device color gamut show device color gamut；
The polygon formed according to the control primary coordinate of display device color gamut is closed polygon more than triangle.
The display device color gamut shows device color gamut, four primary to show more than device color gamut or five primary colours and shows for three primary colours
Show device color gamut, correspondingly, according to display device color gamut control primary coordinate form polygon for triangle, quadrangle or
Closed polygon more than pentagon, specifically, three primary colours show that device color gamut has three kinds of bases of RGB for display device color gamut
The display equipment of color, four primary show the display equipment that device color gamut is four kinds of primary colours of red, green, blue and yellow, and five primary colours show equipment color
Display equipment of the domain for the green five kinds of primary colours of red, green, blue and yellow, according to three kinds of primary colours of RGB of display device color gamut, primary coordinate structure
Into polygon for triangle, according to four kinds of primary colours of red, green, blue and yellow of display device color gamut, the polygon that primary coordinate is formed is
Quadrangle, according to the green five kinds of primary colours of the red, green, blue and yellow of display device color gamut, the polygon that primary coordinate is formed is pentagon.
First count value is random point in the number generated with reference to colour gamut, when detecting the generation position of random point in reference
In the closed area that colour gamut is formed, then the first count value is added 1.Second count value had both been in the reference with reference to colour gamut for random point
In the closed area that primary coordinate is formed, while it is also in the closed area of control primary coordinate composition of display device color gamut
When number, i.e. the second count value for random point with reference to colour gamut and display device color gamut overlapping colour gamut in generation number,
The second count value is then added 1.
The multiple bases NTSC color gamut coverage rate is equal to second count value divided by the first count value, which can
For measuring the multiple bases NTSC colors for the display device color gamut for having multiple bases colour gamuts more than three primary colours, four primary or five primary colours
Domain coverage ratio is specifically represented by following formula：
Wherein, acrossFor NTSC color gamut coverage rate, NNTSCBe random point with reference to colour gamut occur the first count value, Ncross
It is that random point is showing device color gamut and the second count value occurred in reference colour gamut simultaneously.
The number that random point can be set to generate by setting the method for cycle, a cycle generate a random point.Under
Face illustrates to measure the mistake of the multiple bases NTSC color gamut coverage rate of display device color gamut by the formula by a specific example
Journey.
For example, referring to Fig. 3, setting cycle-index be 1000 times, set NNTSCAnd NcrossInitial value for 0, by looking into
Ask national television standard acquisition NTSC system is respectively with reference to the red coordinate of the reference primary coordinate of colour gamut, green coordinate and blue coordinate
(0.670,0.330), (0.210,0.710) and (0.140,0.080), and measure the triangle formed with reference to primary coordinate
Area SNTSCEqual to 0.1582, be measured as by measuring instrument such as colorimeter the display device color gamut of five primary colours red coordinate,
Yellow coordinate, green coordinate, green coordinate and blue coordinate be respectively (0.680,0.310), (0.475,0.501), (0.160,0.700),
(0.085,0.350) and (0.132,0.055), and five primary coordinates for measuring the display device color gamut of five primary colours surround
Pentagon area be 0.2021.In recycling each time, having the colour gamut of display device color gamut and NTSC system with reference to colour gamut
Random point is being generated on figure, random point is first being detected whether in NTSC system reference colour gamut, if by NNTSCValue add 1, Ran Houjian
Survey random point whether simultaneously display device color gamut on, if by NcrossValue add 1, cycle-index reaches 1000 times and gives birth to
After 1000 random points, N is obtainedNTSCAnd NcrossValue for 165 and 159, show in 1000 cycles, 1000 of generation with
Machine point is 165 times with reference to the occurrence number of colour gamut in NTSC system, in NTSC system with reference to the overlapping color of colour gamut and display device color gamut
The number that domain occurs is 159 times, substitutes into formula
It calculates, the multiple bases NTSC color gamut coverage rate of the display equipment is 96.4%.
If the not up to cycle-index of setting, continue subsequent cycle, generate a random point, and obtain it is described with
Then the abscissa and ordinate of machine point repeat the measurement process of above-mentioned NTSC color gamut coverage rate.
Random point can be detected in several ways whether on reference to colour gamut, in one embodiment, increase described first
Before count value, include the following steps：
Measure the area S of the triangle formed with reference to primary coordinateNTSC；
The reference primary coordinate on any two vertex of triangle that traversal is formed with reference to the reference primary coordinate of colour gamut, is surveyed
Measure the area and S of reference colour triangle that the random point is formed with arbitrary described two adjacent vertexsNTSCsum；
If SNTSCAnd SNTSCsumIt is equal, then increase by first count value.
If the area S of triangle formed with reference to the reference primary coordinate of colour gamutNTSCWith random point and appointing with reference to colour gamut
The area and S of reference colour triangle that two adjacent vertexs of meaning are formedNTSCsumEqual, the random point for showing to generate is present in ginseng
According to colour gamut, then increase random point in the counts N occurred with reference to colour gamutNTSC。
It can detect whether random point is existed simultaneously on reference to colour gamut and display device color gamut in several ways, one
In a embodiment, before increasing by second count value, include the following steps：
Measure the area S of polygon that the control primary coordinate is formedpoly；
Traversal shows that the control primary colours on any two vertex of polygon that the control primary coordinate of device color gamut is formed are sat
Mark measures the area and S that compare colour triangle that the random point is formed with arbitrary described two adjacent vertexspolysum；
If SpolyAnd SpolysumIt is equal, and SNTSCAnd SNTSCsumIt is equal, then increase by second count value.
If the area S of triangle formed with reference to the reference primary coordinate of colour gamutNTSCWith random point and appointing with reference to colour gamut
The area and S of reference colour triangle that two adjacent vertexs of meaning are formedNTSCsumIt is equal, also, show the control of device color gamut
The area S for the polygon that primary coordinate is formedpolyIt is formed with any two adjacent vertex of random point and display device color gamut
Compare the area and S of colour trianglepolysumIt is equal, then increase the second count value that random point occurs in display device color gamut,
The random point for showing to generate is existed simultaneously in reference to colour gamut and display device color gamut.
In an optional embodiment, the control primary coordinate for showing device color gamut is obtained, and measure the control
The area of a polygon S that primary coordinate is formedpolyWhen, include the following steps：
Each apex coordinate of polygon for showing that the control primary coordinate of device color gamut is formed is obtained, according to polygon vertex
Sequence is denoted as C respectively1(x1, y1), C2(x2, y2)…Cn(xn, yn), Cn+1(xn+1, yn+1)；Wherein, C1For the polygon
One vertex, x1And y1Abscissa and ordinate for first vertex respectively；C2For first vertex of the polygon, x2
And y2Abscissa and ordinate for second vertex respectively；Cn+1For first vertex of the polygon, xn+1And yn+1To divide
The abscissa and ordinate on other first vertex；
According to each vertex abscissa and ordinate of the polygon, pair for showing device color gamut is measured in the following way
The area of a polygon formed according to primary coordinate：
Wherein, SpolyThe area of a polygon that control primary coordinate for display device color gamut is formed, xiAnd yiTo be respectively
The abscissa and ordinate on i vertex, xi+1And yi+1The respectively abscissa and ordinate on i+1 vertex.
Above-mentioned measurement shows that the formula of area of a polygon that the control primary coordinate of device color gamut is formed has versatility.Under
Face is illustrated by a specific example.Table 1 is the display device color gamut of five primary colours obtained by measuring instrument such as colorimeter
Control primary coordinate table, show that the pentagon that five primary coordinates of device color gamut surround is ranked sequentially according to polygon vertex
It is as follows.C1For pentagonal first vertex, C2For pentagonal second vertex, C3It is described pentagonal
Three vertex, C4For pentagonal 4th vertex, C5For pentagonal 5th vertex.
Table 1
| Vertex | Abscissa | Ordinate |
| C1 | 0.680 | 0.310 |
| C2 | 0.475 | 0.501 |
| C3 | 0.160 | 0.700 |
| C4 | 0.085 | 0.350 |
| C5 | 0.132 | 0.055 |
The coordinate value on pentagonal five vertex is substituted into measure equationIn,
Acquire the area of a polygon S that the control primary coordinate of display device color gamut is formedpolyIt is 0.2021.
In an optional embodiment, traversal shows appointing for the polygon that the control primary coordinate of device color gamut is formed
The control primary coordinate on two vertex of meaning measures the random point and compares colour gamut three with what arbitrary described two adjacent vertexs were formed
Angular area and Spolysum, include the following steps：
Obtain the corresponding abscissa x of random pointRanWith ordinate yRan；
The area of each control colour triangle is measured in the following way：
Wherein, Stri,iFor random point and i-th of colour triangle area formed with i+1 vertex, xiAnd yiTo divide
Not Wei i-th of vertex abscissa and ordinate, xi+1And yi+1The respectively abscissa and ordinate on i+1 vertex, xRanWith
xRanThe respectively corresponding abscissa of random point and ordinate；
The area for each control colour triangle that adds up in the following way：
Wherein, SpolysumThe face for compareing colour triangle formed for the random point with arbitrary described two adjacent vertexs
Product and Stri,iThe area for compareing colour triangle formed for random point with i-th with i+1 vertex.
In an optional embodiment, traversal is with reference to arbitrary the two of the triangle of the reference primary coordinate composition of colour gamut
The reference primary coordinate on a vertex measures the reference colour triangle that the random point is formed with arbitrary described two adjacent vertexs
Area and SNTSCsum, include the following steps：
Obtain the corresponding abscissa x of random pointRanWith ordinate yRan；
Obtain three reference primary colours abscissa x with reference to colour gamutR、xGAnd xBAnd three reference primary colours ordinate yR、yGWith
yB；
The reference colour triangle that the random point is formed with arbitrary described two adjacent vertexs is measured in the following way
Area and SNTSCsum：
Wherein, SNTSCsumThe face of reference colour triangle formed for the random point with arbitrary described two adjacent vertexs
Product and xRanAnd xRanThe respectively corresponding abscissa of random point and ordinate, xR、xGAnd xBBase is referred to for three with reference to colour gamut
Color abscissa, yR、yGAnd yBPrimary colours ordinate is referred to for three with reference to colour gamut.
Illustrate below by a specific example.Table 2 is the reference colour gamut obtained by inquiring national television standard
With reference to primary coordinate table, with reference to colour gamut the triangle that surrounds of three primary coordinates be ranked sequentially according to polygon vertex it is as follows.
Red coordinate is first vertex of the triangle, and green coordinate is second vertex of the triangle, and blue coordinate is described three
Angular third vertex.
Table 2
| Vertex | x | y |
| Red coordinate | 0.670 | 0.330 |
| Green coordinate | 0.210 | 0.710 |
| Blue coordinate | 0.140 | 0.080 |
According to the coordinate value on the three of the triangle vertex, by making supreme people's court or Method of Cosine or other measurement gores
Long-pending method solve the triangle area SNTSCEqual to 0.1582.Obtain the corresponding abscissa x of random pointRanWith vertical seat
Mark yRan, pass through SNTSCsumCalculation formula measure random point with it is red it is green while, it is turquoise while and red blue side three triangles forming
Area and, if certain generate random point after, detect random point be in reference in colour gamut or be in red-green line section, turquoise line segment or
Red blue line section any point position, then the secondary measurement random point with it is red it is green while, it is turquoise while and form three of red blue side
The area and S of triangleNTSCsumWith the area S with reference to colour gamutNTSCIt is equal, then increase random point in first occurred with reference to colour gamut
Count value；If certain generate random point after, it is overseas that random point is in reference colored, then the secondary measurement random point with it is red green
While, it is turquoise while and red blue the side area and S of three triangles that formNTSCsumWith the area S with reference to colour gamutNTSCIt is unequal, then
Keep random point constant in the first count value occurred with reference to colour gamut.
The random point number range can be set according to actual needs, in an optional embodiment, random point
Number ranging from 1000~1000000.
The range of the random point number range of setting can be 1000,10000,100000,1000000, can lead to
The mode for crossing setting cycle generates random point, cycle-index range is set larger, can improve multiple bases NTSC color gamut and cover
The calculating accuracy of lid rate, but not no maximum avoid leading to very much program crashing greatly in calculation amount, and cycle-index range is excessive
The calculating time needed is longer, can influence computational efficiency, the random point number ranging from 1000~1000000, respective cycle
Ranging from 1000 times~1000000 times of numbers range, setting is reasonable, ensure that the calculating accuracy of NTSC color gamut coverage rate with
And computational efficiency.It is further illustrated below by table 3.
Table 3
As shown in Table 3, during cycle-index range N ranging from 10000 times and 100000 times, that is, the random point number generated is
10000 and 100000, according to the second count value NcrossWith the first count value NNTSCOperation result, calculate to obtain display equipment
Multiple bases NTSC color gamut coverage rate for 97.1% and 97.0%, when preset times N is 1000 times, according to the second count value Ncross
With the first count value NNTSCOperation result, calculate multiple bases NTSC color gamut coverage rate be 96.4%, it is seen that in cycle-index
Range N values are larger, and multiple bases NTSC color gamut coverage rate calculates more accurate.Show the multiple bases NTSC color gamut covering of equipment
Rate relatively 100%.It is and middle with reference to gamut area (S according to fig. 3NTSC=0.1582) and display device color gamut area it is more
Side shape area (SpolyIt is 0.2021), to obtain colour gamut percentage (display device color gamut area accounts for the ratio with reference to gamut area)
128%, illustrate the colour gamut of the display in addition to almost occupying with reference to colour gamut, also there are part face outside with reference to gamut regions
It is very abundant to be indicated above the color that the display equipment can be shown for color.
The measuring method of above-mentioned multiple bases NTSC color gamut coverage rate obtains the reference primary coordinate with reference to colour gamut and display
The control primary coordinate of device color gamut successively generates several random points in gamut map and detects the generation position of the random point
It puts, if detecting, the generation position of random point is in the closed area formed with reference to the reference primary coordinate of colour gamut, is increased
Random point is in the first count value occurred with reference to colour gamut, if detecting, the random point is also at the control of display device color gamut simultaneously
In the closed area that primary coordinate is formed, then increase the second count value that random point occurs in display device color gamut, work as random point
After number reaches a certain amount of, multiple bases NTSC color gamut coverage rate is measured according to the first obtained count value and the second count value,
Wherein, the multiple bases NTSC color gamut coverage rate is equal to second count value divided by the first count value.The multiple bases of the present invention
The measuring method of NTSC color gamut coverage rate in gamut map by generating several random points, if the generation position of random point is simultaneously
It is more in the number with reference to colour gamut and display device color gamut, then illustrate to show that the NTSC color gamut coverage rate of equipment is bigger, energy
Enough measure includes the NTSC color gamut coverage rate that the multiple bases for more than three primary colours, four primary or five primary colours showing equipment show equipment,
The accurate color gamut for embodying multiple bases and showing equipment, has versatility, dependable with function.
In one embodiment, referring to Fig. 4, a kind of measuring device of multiple bases NTSC color gamut coverage rate, including：
With reference to primary coordinate acquisition module 10, for obtaining the reference primary coordinate with reference to colour gamut；
Primary coordinate acquisition module 20 is compareed, for obtaining the control primary coordinate for showing device color gamut；
Random point generates and detection module 30, in the gamut map with reference to where colour gamut and display device color gamut
The upper generation position for generating several random points and detecting the random point；
First count value increases module 40, if the generation position for random point is in the reference primary coordinate of reference colour gamut
In the closed area of composition, then increase random point in the first count value occurred with reference to colour gamut；
Second count value increases module 50, if the generation position for random point is in the control of display device color gamut simultaneously
In the closed area that primary coordinate is formed, then increase the second count value that random point occurs in display device color gamut；
Multiple bases NTSC color gamut coverage measure module 60, for according to first count value and the survey of the second count value
Multiple bases NTSC color gamut coverage rate is measured, wherein, the multiple bases NTSC color gamut coverage rate is equal to second count value divided by the
One count value.
In one embodiment, the first count value increases module and includes：
With reference to colour gamut area measurement module, for measuring the area S of the triangle formed with reference to primary coordinateNTSC；
With reference to the area and measurement module of colour triangle, for traversing three of the reference primary coordinate composition with reference to colour gamut
The reference primary coordinate on angular any two vertex measures the ginseng that the random point is formed with arbitrary described two adjacent vertexs
Examine the area and S of colour triangleNTSCsum；
First identification module, if for SNTSCAnd SNTSCsumIt is equal, then increase by first count value.
In one embodiment, the second count value increases module and includes：
Device color gamut area measurement module is shown, for measuring the area of polygon that the control primary coordinate is formed
Spoly；
The area and measurement module of colour triangle are compareed, shows that the control primary coordinate of device color gamut is formed for traversing
Polygon any two vertex control primary coordinate, measure the random point and formed with arbitrary described two adjacent vertexs
Control colour triangle area and Spolysum；
Second identification module, if for SpolyAnd SpolysumIt is equal, and SNTSCAnd SNTSCsumIt is equal, then increase described second
Count value.
In one embodiment, the display device color gamut is shown for three primary colours more than device color gamut shows device color gamut；
The polygon formed according to the control primary coordinate of display device color gamut is closed polygon more than triangle.
In one embodiment, the display device color gamut is shown for three primary colours more than device color gamut shows device color gamut；
The polygon formed according to the control primary coordinate of display device color gamut is closed polygon more than triangle.
In one embodiment, display device color gamut area measurement module includes：
Apex coordinate acquisition module, for obtaining each top of polygon for showing that the control primary coordinate of device color gamut is formed
Point coordinates is denoted as C respectively according to polygon vertex sequence1(x1, y1), C2(x2, y2)…Cn(xn, yn), Cn+1(xn+1, yn+1)；Its
In, C1For first vertex of the polygon, x1And y1Abscissa and ordinate for first vertex respectively；C2It is described
First vertex of polygon, x2And y2Abscissa and ordinate for second vertex respectively；Cn+1For the polygon
One vertex, xn+1And yn+1Abscissa and ordinate for first vertex respectively；
Device color gamut the second measurement module of area is shown, for each vertex abscissa according to the polygon and vertical seat
Mark measures the area of a polygon for showing that the control primary coordinate of device color gamut is formed in the following way：
Wherein, SpolyThe area of a polygon that control primary coordinate for display device color gamut is formed, xiAnd yiTo be respectively
The abscissa and ordinate on i vertex, xi+1And yi+1The respectively abscissa and ordinate on i+1 vertex.
In one embodiment, the area and measurement module that compare colour triangle include：
Random point coordinate obtaining module, for obtaining the corresponding abscissa x of random pointRanWith ordinate yRan；
Colour gamut triangle area measurement module is compareed, for measuring the face of each control colour triangle in the following way
Product：
Wherein, Stri,iFor random point and i-th of colour triangle area formed with i+1 vertex, xiAnd yiTo divide
Not Wei i-th of vertex abscissa and ordinate, xi+1And yi+1The respectively abscissa and ordinate on i+1 vertex, xRanWith
xRanThe respectively corresponding abscissa of random point and ordinate；
Colour triangle accumulator module is compareed, for the area for each control colour triangle that adds up in the following way：
Wherein, SpolysumThe face for compareing colour triangle formed for the random point with arbitrary described two adjacent vertexs
Product and Stri,iThe area for compareing colour triangle formed for random point with i-th with i+1 vertex.
In one embodiment, include with reference to the area and measurement module of colour triangle：
Random point coordinate obtaining module, for obtaining the corresponding abscissa x of random pointRanWith ordinate yRan；
Second coordinate obtaining module, for obtaining three reference primary colours abscissa x with reference to colour gamutR、xGAnd xB, Yi Jisan
A reference primary colours ordinate yR、yGAnd yB；
With reference to the area and the second measurement module of colour triangle, for measuring the random point in the following way with appointing
The area and S of reference colour triangle that described two adjacent vertexs of anticipating are formedNTSCsum：
Wherein, SNTSCsumThe face of reference colour triangle formed for the random point with arbitrary described two adjacent vertexs
Product and xRanAnd xRanThe respectively corresponding abscissa of random point and ordinate, xR、xGAnd xBBase is referred to for three with reference to colour gamut
Color abscissa, yR、yGAnd yBFor NTSC system, three with reference to colour gamut refer to primary colours ordinate.
In one embodiment, random point number ranging from 1000~1000000.
The measuring device of the multiple bases NTSC color gamut coverage rate of the present invention and the measurement side of multiple bases NTSC color gamut coverage rate
Method corresponds, in the technical characteristic and its beneficial that the embodiment of the measuring method of above-mentioned multiple bases NTSC color gamut coverage rate illustrates
Effect suitable for the embodiment of the measuring device of the multiple bases NTSC color gamut coverage rate, hereby give notice that.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
The each technical characteristic all possible combinations applied in example are all described, as long as however lance is not present in the combination of these technical characteristics
Shield all should be the range that this specification is recorded.
Embodiment described above only expresses several embodiments of the present invention, and description is more specific and detailed, but not
Can the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that those of ordinary skill in the art are come
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of measuring method of multiple bases NTSC color gamut coverage rate, which is characterized in that include the following steps：
Obtain the reference primary coordinate with reference to colour gamut；
Obtain the control primary coordinate for showing device color gamut；
Several random points are generated in the gamut map with reference to where colour gamut and display device color gamut and are detected described random
The generation position of point；
If the generation position of the random point be in reference to colour gamut reference primary coordinate form closed area in, increase with
Machine point is in the first count value occurred with reference to colour gamut；
If in the generation position of the random point closed area that the control primary coordinate in display device color gamut is formed simultaneously,
Then increase the second count value that random point occurs in display device color gamut；
Multiple bases NTSC color gamut coverage rate is measured according to first count value and the second count value, wherein, the multiple bases
NTSC color gamut coverage rate is equal to second count value divided by the first count value.
2. the measuring method of multiple bases NTSC color gamut coverage rate according to claim 1, which is characterized in that increase described the
Before one count value, include the following steps：
Measure the area S of the triangle formed with reference to primary coordinateNTSC；
The reference primary coordinate on any two vertex of triangle that traversal is formed with reference to the reference primary coordinate of colour gamut, measures institute
State the area and S of reference colour triangle that random point is formed with arbitrary described two adjacent vertexsNTSCsum；
If SNTSCAnd SNTSCsumIt is equal, then increase by first count value.
3. the measuring method of multiple bases NTSC color gamut coverage rate according to claim 2, which is characterized in that increase described the
Before two count values, include the following steps：
Measure the area S of polygon that the control primary coordinate is formedpoly；
Traversal shows the control primary coordinate on any two vertex of polygon that the control primary coordinate of device color gamut is formed, and surveys
Measure the area and S that compare colour triangle that the random point is formed with arbitrary described two adjacent vertexspolysum；
If SpolyAnd SpolysumIt is equal, and SNTSCAnd SNTSCsumIt is equal, then increase by second count value.
4. the measuring method of multiple bases NTSC color gamut coverage rate according to claim 3, which is characterized in that
The display device color gamut is shown for three primary colours more than device color gamut shows device color gamut；
The polygon formed according to the control primary coordinate of display device color gamut is closed polygon more than triangle.
5. the measuring method of multiple bases NTSC color gamut coverage rate according to claim 3, which is characterized in that obtain display and set
The control primary coordinate of standby colour gamut, and measure the area of a polygon S that the control primary coordinate is formedpolyWhen, including following step
Suddenly：
Each apex coordinate of polygon for showing that the control primary coordinate of device color gamut is formed is obtained, according to polygon vertex sequence
It is denoted as C respectively1(x1, y1), C2(x2, y2)…Cn(xn, yn), Cn+1(xn+1, yn+1)；Wherein, C1First for the polygon
Vertex, x1And y1The abscissa and ordinate on respectively first vertex；C2For second vertex of the polygon, x2And y2For
The abscissa and ordinate on second vertex respectively；Cn+1For (n+1)th vertex of the polygon, xn+1And yn+1It is respectively n-th
The abscissa and ordinate on+1 vertex；
According to each vertex abscissa and ordinate of the polygon, the control base for showing device color gamut is measured in the following way
The area of a polygon that chromaticity coordinates is formed：
Wherein, SpolyThe area of a polygon that control primary coordinate for display device color gamut is formed, xiAnd yiTo be respectively i-th
The abscissa and ordinate on vertex, xi+1And yi+1The respectively abscissa and ordinate on i+1 vertex.
6. the measuring method of multiple bases NTSC color gamut coverage rate according to claim 5, which is characterized in that traversal display is set
The control primary coordinate on any two vertex of polygon that the control primary coordinate of standby colour gamut is formed, measure the random point with
The area and S of control colour triangle that arbitrary described two adjacent vertexs are formedpolysum, include the following steps：
Obtain the corresponding abscissa x of random pointRanWith ordinate yRan；
The area of each control colour triangle is measured in the following way：
Wherein, Stri,iThe colour triangle area formed for random point and i-th and with i+1 vertex, xiAnd yiFor respectively
For the abscissa and ordinate on i-th of vertex, xi+1And yi+1The respectively abscissa and ordinate on i+1 vertex, xRanWith
xRanThe respectively corresponding abscissa of random point and ordinate；
The area for each control colour triangle that adds up in the following way：
Wherein, SpolysumThe area for compareing colour triangle that is formed for the random point and arbitrary described two adjacent vertexs and,
Stri,iFor random point with i-th and with i+1 vertex form the area for compareing colour triangle.
7. the measuring method of multiple bases NTSC color gamut coverage rate according to claim 2, which is characterized in that traversal reference colored
Reference the primary coordinate on any two vertex for the triangle that the reference primary coordinate in domain is formed, measure the random point with arbitrarily
The area and S for the reference colour triangle that described two adjacent vertexs are formedNTSCsum, include the following steps：
Obtain the corresponding abscissa x of random pointRanWith ordinate yRan；
Obtain three reference primary colours abscissa x with reference to colour gamutR、xGAnd xBAnd three reference primary colours ordinate yR、yGAnd yB；
The face of reference colour triangle that the random point is formed with arbitrary described two adjacent vertexs is measured in the following way
Product and SNTSCsum：
Wherein, SNTSCsumThe area of the reference colour triangle formed with arbitrary described two adjacent vertexs for the random point and,
xRanAnd xRanThe respectively corresponding abscissa of random point and ordinate, xR、xGAnd xBThe horizontal seat of primary colours is referred to for three with reference to colour gamut
Mark, yR、yGAnd yBFor NTSC system, three with reference to colour gamut refer to primary colours ordinate.
8. the measuring method of the multiple bases NTSC color gamut coverage rate according to any one of claim 1-7, which is characterized in that
Random point number ranging from 1000~1000000.
9. a kind of measuring device of multiple bases NTSC color gamut coverage rate, which is characterized in that including：
With reference to primary coordinate acquisition module, for obtaining the reference primary coordinate with reference to colour gamut；
Primary coordinate acquisition module is compareed, for obtaining the control primary coordinate for showing device color gamut；
Random point generates and detection module, for being generated in the gamut map with reference to where colour gamut and display device color gamut
Random point and the generation position for detecting the random point；
First count value increases module, if formed for reference primary coordinate of the generation position of random point in reference colour gamut
In closed area, then increase random point in the first count value occurred with reference to colour gamut；
Second count value increases module, if the generation position for random point is sat simultaneously in the control primary colours for showing device color gamut
It marks in the closed area formed, then increases the second count value that random point occurs in display device color gamut；
Multiple bases NTSC color gamut coverage measure module, if generating number for random point reaches preset times, according to
First count value and the second count value measure multiple bases NTSC color gamut coverage rate, wherein, the multiple bases NTSC color gamut covering
Rate is equal to second count value divided by the first count value.
10. the measuring device of multiple bases NTSC color gamut coverage rate according to claim 9, which is characterized in that first counts
Value increases module and includes：
With reference to colour gamut area measurement module, for measuring the area S of the triangle formed with reference to primary coordinateNTSC；
The triangle formed with reference to the area and measurement module of colour triangle, the reference primary coordinate for traversing with reference to colour gamut
Any two vertex reference primary coordinate, measure the reference color that the random point is formed with arbitrary described two adjacent vertexs
The area and S of domain triangleNTSCsum；
First identification module, if for SNTSCAnd SNTSCsumIt is equal, then increase by first count value.
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| CN104394408A (en) * | 2011-12-30 | 2015-03-04 | 南阳首控光电有限公司 | Laser television colour gamut coverage rate measuring method |
| CN103389199B (en) * | 2013-07-10 | 2015-11-25 | 中国电子科技集团公司第四十一研究所 | A kind of calibration steps for colour gamut and color domain coverage ratio |
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