CN106878701A - The detection method and device of a kind of TVLine - Google Patents
The detection method and device of a kind of TVLine Download PDFInfo
- Publication number
- CN106878701A CN106878701A CN201611266945.3A CN201611266945A CN106878701A CN 106878701 A CN106878701 A CN 106878701A CN 201611266945 A CN201611266945 A CN 201611266945A CN 106878701 A CN106878701 A CN 106878701A
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- interpretation
- tvline
- region
- interpretation region
- original position
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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
- H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
-
- 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
Abstract
The invention discloses the detection method and device of TVLine.The method includes：The RGB image of test pattern is obtained, and RGB image is converted into YUV image；Using the interpretation region in least square method positioning YUV image；Boundary information according to interpretation region determines the original position and final position of TVLine parsing lines, TVLine parses line and carries out interpretation to interpretation region since original position untill the position of the definition less than predetermined threshold value of TVLine parsing lines is reached, and records the coordinate information of the definition less than predetermined threshold value position of TVLine parsing lines；The coordinate information of the definition less than predetermined threshold value position of coordinate information, final position coordinate information and record TVLine parsing lines according to original position, calculates TVLine analytic values and exports.It can be seen that, while the present invention is automatically performed TVLine detections, cost is relatively low, is suitably employed in production test.
Description
Technical field
The present invention relates to detection technique field, the detection method and device of more particularly to a kind of TVLine.
Background technology
Under normal circumstances, camera measures its parsing power using the method for TVLine.TVLine conveniently can intuitively show
Go out the parsing power of camera.But, during production test, can there are problems in TVLine methods, for example, cannot find
A kind of suitable mode carries out automatic detection, so can only greatly be increased by manually carrying out the analytic value of interpretation TVLine
The randomness of interpretation, influences final test result.
Existing test program, on the one hand, original localization method is located through to interpretation region in test pattern, it is fixed
Position low precision, can cause test result inaccurate；On the other hand, even if having the program or algorithm of accurate interpretation zone location,
But it is often expensive, allow people to hang back.It can be seen that, can both carry out the accurate of interpretation region without a kind of in the prior art
The method of positioning and reasonable price carries out the detection of TVLine.
The content of the invention
In view of prior art do not have it is a kind of can both carry out interpretation region be accurately positioned and the method for reasonable price is carried out
The problem of the detection of TVLine, it is proposed that the detection method and device of TVLine of the invention, to solve or at least in part
Solve the above problems.
According to an aspect of the invention, there is provided a kind of detection method of TVLine, methods described includes：
The RGB image of test pattern is obtained, and the RGB image is converted into YUV image；
The interpretation region in the YUV image is positioned using least square method；
Boundary information according to the interpretation region determines the original position and final position of TVLine parsing lines, TVLine
Parsing line carries out interpretation up to reaching the clear of the TVLine parsings line since the original position to the interpretation region
Untill position of the degree less than predetermined threshold value, the definition for recording the TVLine parsings line is believed less than the coordinate of predetermined threshold value position
Breath；
Coordinate information, final position coordinate information according to the original position and described record the TVLine parsings line
Definition less than predetermined threshold value position coordinate information, calculate TVLine analytic values simultaneously export；
Wherein, the pigment value in the interpretation region is more than with the difference of the pigment value in non-interpretation region in the YUV image
Or equal to default pigment limit value.
According to another aspect of the present invention, there is provided a kind of detection means of TVLine, described device includes：
Acquiring unit, the RGB image for obtaining test pattern, and the RGB image is converted into YUV image；
Positioning unit, for positioning the interpretation region in the YUV image using least square method；
Interpretation unit, original position and end for determining TVLine parsing lines according to the boundary information in the interpretation region
Stop bit is put, and TVLine parsing lines carry out interpretation up to reaching the TVLine since the original position to the interpretation region
Untill parsing the position of the definition less than predetermined threshold value of line, the definition for recording the TVLine parsings line is less than predetermined threshold value
The coordinate information of position；
Computing unit, for the coordinate information according to the original position, final position coordinate information and record institute
The coordinate information of the definition less than predetermined threshold value position of TVLine parsing lines is stated, TVLine analytic values is calculated and is exported；
Wherein, the pigment value in the interpretation region is more than with the difference of the pigment value in non-interpretation region in the YUV image
Or equal to default pigment limit value.
In sum, technical scheme, YUV image, Ran Houli are converted to by by the RGB image of test pattern
With least square method position the interpretation region in the YUV image, it is possible to achieve interpretation region is accurately positioned, finally, in root
The interpretation in the interpretation region of TVLine is carried out according to the interpretation region after positioning and the analytic value of TVLine is calculated.The present invention is using most
Small square law, it is not necessary to which expensive algorithm can also carry out being accurately positioned for interpretation region.It can be seen that, the present invention realizes interpretation region
Be accurately positioned, be automatically performed TVLine detect while, cost is relatively low, is suitably employed in production test.
Brief description of the drawings
A kind of flow chart of the detection method of TVLine that Fig. 1 is provided for one embodiment of the invention；
A kind of schematic diagram in the interpretation region of the detection method of TVLine that Fig. 2 is provided for one embodiment of the invention；
The positioning schematic diagram in interpretation region in a kind of detection of TVLine that Fig. 3 is provided for one embodiment of the invention；
A kind of schematic diagram of the detection means of TVLine that Fig. 4 is provided for one embodiment of the invention.
Specific embodiment
Mentality of designing of the invention is：In view of prior art do not have it is a kind of can both carry out interpretation region be accurately positioned and
The method of reasonable price carries out the problem of the detection of TVLine.The present invention carries out the accurate fixed of interpretation region using least square method
Position, then carries out the detection of TVLine again, realizes being accurately positioned for interpretation region, while being automatically performed TVLine detections, into
This is relatively low.To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment of the present invention
It is described in further detail.
A kind of flow chart of the detection method of TVLine that Fig. 1 is provided for one embodiment of the invention.As shown in figure 1, should
Method includes：
Step S110, obtains the RGB image of test pattern, and RGB image is converted into YUV image.
A kind of schematic diagram in the interpretation region of the detection method of TVLine that Fig. 2 is provided for one embodiment of the invention.Will
The effect that the RGB image of test pattern is converted to YUV image is as shown in Figure 2.Wherein, middle black bars are interpretation region.
Step S120, using the interpretation region in least square method positioning YUV image.
It should be noted that the possible more than one in interpretation region in test pattern, then for other interpretation regions
For, as long as one of interpretation region has carried out accurate positioning, it is possible to according to the position relationship reality between interpretation region
The positioning in existing other interpretation regions.
Step S130, the boundary information according to interpretation region determines the original position and final position of TVLine parsing lines,
TVLine parsing lines carry out interpretation to interpretation region since original position and are less than up to reaching the definition of TVLine parsing lines
Untill the position of predetermined threshold value, the coordinate information of the definition less than predetermined threshold value position of record TVLine parsing lines.
TVLine parsing lines carry out interpretation since original position to interpretation region, and mobile benefit step-length can basis every time
Demand is set, for example, 3 fixed moving step lengths of pixel of setting.
It should be noted that position of the definition less than predetermined threshold value in order to accurately find TVLine parsing lines, when
TVLine parsing lines carry out interpretation to interpretation region since original position and are less than up to reaching the definition of TVLine parsing lines
The position of predetermined threshold value is not stopped at once, but TVLine parsing lines are moved into one or two again along interpretation direction
Step-length, after it is determined that the definition of TVLine parsing lines is respectively less than predetermined threshold value, the TVLine parsings for just arriving first time interpretation
The definition of line is less than the position of predetermined threshold value as stop position.
Step S140, coordinate information, final position coordinate information and record TVLine according to original position parse line
Definition calculates TVLine analytic values and exports less than the coordinate information of predetermined threshold value position.
Because needing to be positioned with the value of chromatism in non-interpretation region according to interpretation region using least square method.So,
The pigment value in interpretation region is more than or equal to default pigment limit value with the difference of the pigment value in non-interpretation region in YUV image.
The present invention utilizes least square method, it is not necessary to which expensive algorithm can also carry out being accurately positioned for interpretation region.Can
See, the present invention realizes being accurately positioned for interpretation region, while being automatically performed TVLine detections, cost is relatively low, is suitably employed in life
Produce in testing.
In one embodiment of the invention, the interpretation in the utilization least square method positioning YUV image in step S120
Region includes：
(1) theoretical position of the central pixel point in interpretation region in configuration file is read.
Because having the theoretical position of interpretation regional center point in configuration file, the reality of the central pixel point in interpretation region
Position is too remote without departing from theoretical position.So, in order to realize the positioning of the physical location in interpretation region, can be according to configuration
The theoretical position of the central pixel point in interpretation region carries out the Primary Location in interpretation region in file.
(2) theoretical position according to central pixel point finds several pixels on interpretation zone boundary.
Can be by the method for spiral search when finding several pixels on interpretation zone boundary, then basis
Whether the value of chromatism of pixel, i.e., the aberration mutation for having pixel is found.
(3) after borderline several pixels in interpretation region are found, will be searched out using least square method
Several pixels are fitted to circle, using round central coordinate of circle as the central pixel point in interpretation region physical location；According to sentencing
The dimension information positioning interpretation region in the interpretation region in the physical location and configuration file of the central pixel point of reading field, with
And the size in interpretation region.
Several pixels found according to the theoretical position of central pixel point on interpretation zone boundary in above-mentioned.Find
Can be by the method for spiral search, then according to the aberration of pixel when several pixels on interpretation zone boundary
Whether value, i.e., the aberration mutation for having pixel is found.Specifically refer to：
Theoretical position with the central pixel point in interpretation region is as current point；With current point as starting point, to interpretation region
Outer search, first pixel of pigment value mutation that will be searched is used as first pixel on interpretation zone boundary；With
First pixel is starting point, clockwise or counterclockwise, next interpretation region is determined according to pigment value
Borderline second pixel point, then again with second pixel point as starting point, determines the 3rd on interpretation zone boundary
Pixel, by that analogy, untill around interpretation region one week.
The positioning schematic diagram in interpretation region in a kind of detection of TVLine that Fig. 3 is provided for one embodiment of the invention.Profit
The positioning in the interpretation region in YUV image is realized with least square method, the white dot around interpretation zone boundary is shown in Fig. 3
It is several pixels on the interpretation zone boundary searched out by the method for spiral search, center white spot is interpretation
The theoretical position of the central pixel point in region.
The parsing power of camera needs to be experienced by the TVLine analytic values on different directions.So, of the invention
In one embodiment, the boundary information according to interpretation region in step S130 determines original position and the end of TVLine parsing lines
Stop bit is put and is specifically included：
Right boundary information according to interpretation region determines the original position and final position of TVLine levels parsing line；With
And, the up-and-down boundary position according to interpretation region determines that TVLine vertically parses the original position and final position of line.Then divide
The detection do not gone up from horizontal direction and TVLine is carried out in vertical direction.
So, the boundary information according to interpretation region in step s 130 determine TVLine parsing line original position and
Final position is specifically to be more than the brightness value on the border in interpretation region with the difference of the brightness value in the non-interpretation region of YUV image
The position of predetermined luminance threshold value is defined as the original position or final position of TVLine parsing lines.
For example, at the left margin in interpretation region, searching out the difference of brightness value of borderline pixel more than default
After luminance threshold, the coordinate of the pixel that will be searched out parses the original position of line as TVLine；And in interpretation region
At right margin, the difference of brightness value of borderline pixel is searched out more than after predetermined luminance threshold value, the pixel that will be searched out
The coordinate of point parses the final position of line as TVLine.
A kind of schematic diagram of the detection means of TVLine that Fig. 4 is provided for one embodiment of the invention.As shown in figure 4, should
The detection means 400 of TVLine includes：
Acquiring unit 410, for obtaining the RGB image of test pattern, and is converted to YUV image by RGB image；
Positioning unit 420, for using the interpretation region in least square method positioning YUV image.
Interpretation unit 430, original position and end for determining TVLine parsing lines according to the boundary information in interpretation region
Stop bit is put, and TVLine parsing lines carry out interpretation up to reaching the clear of TVLine parsing lines since original position to interpretation region
Untill position of the degree less than predetermined threshold value, the coordinate information of the definition less than predetermined threshold value position of record TVLine parsing lines.
Computing unit 440, for the coordinate information according to original position, final position coordinate information and record TVLine solutions
The coordinate information of the definition less than predetermined threshold value position of line is analysed, TVLine analytic values is calculated and is exported.
Wherein, the pigment value in interpretation region is more than or equal to pre- with the difference of the pigment value in non-interpretation region in YUV image
If pigment limit value.
In one embodiment of the invention, positioning unit 420 is used for：
Read the theoretical position of the central pixel point in interpretation region in configuration file.
Theoretical position according to central pixel point finds several pixels on interpretation zone boundary.
Several pixels that will be searched out using least square method are fitted to circle, using round central coordinate of circle as interpretation area
The physical location of the central pixel point in domain；Sentencing in the physical location and configuration file of the central pixel point according to interpretation region
The dimension information positioning interpretation region of reading field.
In one embodiment of the invention, positioning unit 420 is used for：
Theoretical position with the central pixel point in interpretation region is as current point.
With current point as starting point, searched for outside interpretation region, first pixel of pigment value mutation that will be searched
As first pixel on interpretation zone boundary.
It is starting point with first pixel, clockwise or counterclockwise, is determined according to pigment value next
Second pixel point on individual interpretation zone boundary, then determines interpretation zone boundary with second pixel point as starting point again
On the 3rd pixel, by that analogy, untill around interpretation region one week.
In one embodiment of the invention, interpretation unit 430 is used for：
Right boundary information according to interpretation region determines the original position and final position of TVLine levels parsing line；With
And,
Up-and-down boundary position according to interpretation region determines that TVLine vertically parses the original position and final position of line.
In one embodiment of the invention, interpretation unit 430 is used for：
The brightness value on the border in interpretation region is bright more than default with the difference of the brightness value in the non-interpretation region of YUV image
The position for spending threshold value is defined as the original position or final position of TVLine parsing lines.
It should be noted that each embodiment of the device shown in Fig. 4 is corresponding identical with each embodiment of method shown in Fig. 1,
It has been described in detail above, has will not be repeated here.
In sum, technical scheme, YUV image, Ran Houli are converted to by by the RGB image of test pattern
With least square method position the interpretation region in the YUV image, it is possible to achieve interpretation region is accurately positioned, finally, in root
The interpretation in the interpretation region of TVLine is carried out according to the interpretation region after positioning and the analytic value of TVLine is calculated.The present invention is using most
Small square law, it is not necessary to which expensive algorithm can also carry out being accurately positioned for interpretation region.It can be seen that, the present invention realizes interpretation region
Be accurately positioned, be automatically performed TVLine detect while, cost is relatively low, is suitably employed in production test.
The above, specific embodiment only of the invention, under above-mentioned teaching of the invention, those skilled in the art
Other improvement or deformation can be carried out on the basis of above-described embodiment.It will be understood by those skilled in the art that above-mentioned tool
The purpose of the present invention is simply preferably explained in body description, and protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. a kind of detection method of TVLine, it is characterised in that methods described includes：
The RGB image of test pattern is obtained, and the RGB image is converted into YUV image；
The interpretation region in the YUV image is positioned using least square method；
Boundary information according to the interpretation region determines the original position and final position of TVLine parsing lines, TVLine parsings
It is small up to reaching the definition of the TVLine parsings line that line carries out interpretation since the original position to the interpretation region
Untill the position of predetermined threshold value, the coordinate information of the definition less than predetermined threshold value position of the TVLine parsings line is recorded；
Coordinate information, final position coordinate information according to the original position and described record the clear of the TVLine parsings line
Clear degree calculates TVLine analytic values and exports less than the coordinate information of predetermined threshold value position；
Wherein, the pigment value in the interpretation region is more than or waits with the difference of the pigment value in non-interpretation region in the YUV image
In default pigment limit value.
2. the method for claim 1, it is characterised in that the utilization least square method is positioned in the YUV image
Interpretation region includes：
Read the theoretical position of the central pixel point in interpretation region described in configuration file；
Theoretical position according to the central pixel point finds several pixels on the interpretation zone boundary；
Using least square method will search out described in several pixels be fitted to circle, using the central coordinate of circle of the circle as institute
State the physical location of the central pixel point in interpretation region；The physical location of the central pixel point according to the interpretation region and institute
The dimension information for stating the interpretation region in configuration file positions the interpretation region.
3. method as claimed in claim 2, it is characterised in that the theoretical position according to the central point finds the interpretation area
Borderline several pixels in domain include：
Theoretical position with the central pixel point in the interpretation region is as current point；
With the current point as starting point, searched for outside the interpretation region, first picture of pigment value mutation that will be searched
Vegetarian refreshments is used as first pixel on the interpretation zone boundary；
With first pixel as starting point, clockwise or counterclockwise, determined according to pigment value next
Second pixel point on the individual interpretation zone boundary, then determines the interpretation with second pixel point as starting point again
The 3rd pixel on zone boundary, by that analogy, untill around the interpretation region one week.
4. the method for claim 1, it is characterised in that described to be determined according to the boundary information in the interpretation region
The original position and final position of TVLine parsing lines, including：
Right boundary information according to the interpretation region determines the original position and final position of TVLine levels parsing line；With
And,
Up-and-down boundary position according to the interpretation region determines that TVLine vertically parses the original position and final position of line.
5. method as claimed in claim 4, it is characterised in that the boundary information according to the interpretation region determines that TVLine is solved
The original position and final position for analysing line include：
The brightness value on the border in the interpretation region and the difference of the brightness value in the non-interpretation region of the YUV image are more than pre-
If the position of luminance threshold is defined as the original position or final position of TVLine parsing lines.
6. a kind of detection means of TVLine, it is characterised in that described device includes：
Acquiring unit, the RGB image for obtaining test pattern, and the RGB image is converted into YUV image；
Positioning unit, for positioning the interpretation region in the YUV image using least square method；
Interpretation unit, original position and stop bit for determining TVLine parsing lines according to the boundary information in the interpretation region
Put, TVLine parsing lines carry out interpretation up to reaching the TVLine parsings since the original position to the interpretation region
Untill position of the definition of line less than predetermined threshold value, the definition for recording the TVLine parsings line is less than predetermined threshold value position
Coordinate information；
Computing unit, for described in the coordinate information according to the original position, final position coordinate information and the record
The coordinate information of the definition less than predetermined threshold value position of TVLine parsing lines, calculates TVLine analytic values and exports；
Wherein, the pigment value in the interpretation region is more than or waits with the difference of the pigment value in non-interpretation region in the YUV image
In default pigment limit value.
7. device as claimed in claim 6, it is characterised in that the positioning unit is used for：
Read the theoretical position of the central pixel point in interpretation region described in configuration file；
Theoretical position according to the central pixel point finds several pixels on the interpretation zone boundary；
Using least square method will search out described in several pixels be fitted to circle, using the central coordinate of circle of the circle as institute
State the physical location of the central pixel point in interpretation region；The physical location of the central pixel point according to the interpretation region and institute
The dimension information for stating the interpretation region in configuration file positions the interpretation region.
8. device as claimed in claim 7, it is characterised in that the positioning unit is used for：
Theoretical position with the central pixel point in the interpretation region is as current point；
With the current point as starting point, searched for outside the interpretation region, first picture of pigment value mutation that will be searched
Vegetarian refreshments is used as first pixel on the interpretation zone boundary；
With first pixel as starting point, clockwise or counterclockwise, determined according to pigment value next
Second pixel point on the individual interpretation zone boundary, then determines the interpretation with second pixel point as starting point again
The 3rd pixel on zone boundary, by that analogy, untill around the interpretation region one week.
9. device as claimed in claim 6, it is characterised in that the interpretation unit is used for：
Right boundary information according to the interpretation region determines the original position and final position of TVLine levels parsing line；With
And,
Up-and-down boundary position according to the interpretation region determines that TVLine vertically parses the original position and final position of line.
10. device as claimed in claim 9, it is characterised in that the interpretation unit is used for：
The brightness value on the border in the interpretation region and the difference of the brightness value in the non-interpretation region of the YUV image are more than pre-
If the position of luminance threshold is defined as the original position or final position of TVLine parsing lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611266945.3A CN106878701A (en) | 2016-12-31 | 2016-12-31 | The detection method and device of a kind of TVLine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611266945.3A CN106878701A (en) | 2016-12-31 | 2016-12-31 | The detection method and device of a kind of TVLine |
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