CN114283097A - Slit lamp point correction method and device for special-shaped LED display screen body - Google Patents
Slit lamp point correction method and device for special-shaped LED display screen body Download PDFInfo
- Publication number
- CN114283097A CN114283097A CN202210190127.9A CN202210190127A CN114283097A CN 114283097 A CN114283097 A CN 114283097A CN 202210190127 A CN202210190127 A CN 202210190127A CN 114283097 A CN114283097 A CN 114283097A
- Authority
- CN
- China
- Prior art keywords
- lamp point
- lamp
- point
- target
- adjacent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention relates to the technical field of LED display screen correction, and particularly discloses a method and a device for correcting a slit lamp point of a special-shaped LED display screen body, wherein the method comprises the steps of obtaining an image of the special-shaped LED display screen and determining an image coordinate of a lamp point at the slit position in the special-shaped LED display screen; selecting and determining image coordinates of a reference lamp point, a first adjacent reference lamp point and a second adjacent reference lamp point; calculating a reference distance parameter of a reference lamp point; selecting a target lamp point, a first adjacent target lamp point and a second adjacent target lamp point; calculating target distance parameters of the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point; calculating a correction coefficient of the gap position lamp point; and correcting the lamp points at the gap positions of the special-shaped LED display screen. The invention corrects the lamp points at the gap positions of the special-shaped LED display screen, realizes the seam repair treatment of the spliced special-shaped LED display screen, solves the problem of bright lines or dark lines during the display of the screen body and improves the display effect of the special-shaped LED display screen.
Description
Technical Field
The invention relates to the technical field of LED display screen correction, in particular to a method and a device for correcting a slit lamp point of a special-shaped LED display screen body.
Background
The LED display screen has wide application, such as application scenes of advertisement media, conference exhibition, information distribution and the like. Along with the market demand, people pay more attention to the display effect of the LED display screen. The large-medium LED display screen is formed by splicing a plurality of LED boxes, a single LED box is formed by splicing a plurality of LED modules, the splicing process is often limited by mechanical processing reasons such as machining precision and splicing precision, the distance between LED lamp points at the edge of the spliced LED box is possibly larger than or smaller than the distance between LED lamps at the edge of the non-LED box (the distance between the LED lamp points), the luminous density of the LED lamp points at the edge is changed, and the problem of bright lines or dark lines can be caused when low-frequency images are displayed.
In order to achieve a good display effect, the lamp point of the LED display screen needs to be corrected. For the spliced LED display screen, the gaps formed by splicing the LED boxes with regular (rectangular) shapes are horizontal and vertical, the conventional seam repairing mode can be used for correction, the seam repairing mode is only suitable for the LED display screen with regular shapes, and is not suitable for the LED display screen formed by splicing the LED boxes with irregular shapes, such as the LED boxes with parallelogram, if the conventional seam repairing mode is used for correction, the correction effect is obviously poor, and even the display effect is poorer.
Therefore, a method is needed to solve the problem of correcting the light point gap of the LED display screen spliced by the LED boxes with irregular shapes.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a method and a device for correcting a slit lamp point of a special-shaped LED display screen body.
The invention discloses a method for correcting a slit lamp point of a special-shaped LED display screen body, which comprises the following steps:
acquiring an image of the special-shaped LED display screen, and determining image coordinates of light points at the position of a gap in the special-shaped LED display screen according to a preset light point calculation strategy;
selecting any one non-gap position lamp point in the special-shaped LED display screen image as a reference lamp point, selecting a first adjacent reference lamp point and a second adjacent reference lamp point for the reference lamp point according to a preset lamp point selection strategy, and determining image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point;
calculating a reference distance parameter of the reference lamp point through image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point and a preset distance parameter calculation strategy;
sequentially selecting target lamp points from the gap position lamp points, and selecting a first adjacent target lamp point and a second adjacent target lamp point for the target lamp points from the gap position lamp points according to a lamp point selection strategy;
calculating target distance parameters of the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point through image coordinates of the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point and a distance parameter calculation strategy;
calculating a correction coefficient of the gap position lamp point by a reference distance parameter, a target distance parameter and a preset coefficient correction algorithm;
and acquiring a lamp point correction coefficient of the full-screen lamp point of the special-shaped LED display screen, and correcting the gap position lamp point of the special-shaped LED display screen according to the lamp point correction coefficient and the correction coefficient of the gap position lamp point.
Further, confirm the image coordinate of gap position lamp point in the special-shaped LED display screen according to predetermined lamp point calculation strategy, include:
determining the edges and the vertexes of the special-shaped LED display screen in the special-shaped LED display screen image;
establishing a rectangular coordinate system on the image of the special-shaped LED display screen, taking the vertex of a preset position as the origin of the rectangular coordinate system, and determining the image coordinates of all the vertices of the special-shaped LED display screen;
the method comprises the steps of filling the special-shaped LED display screen into a rectangle in a rectangular coordinate system according to the vertex of the special-shaped LED display screen, and calculating the image coordinates of the light points at the gap position in the special-shaped LED display screen according to the image coordinates of the rectangle, the light point coordinates of the special-shaped LED display screen and the image coordinates of the vertex.
Further, the lamp point selection strategy comprises:
the first adjacent reference lamp point is a lamp point which is positioned in the same row with the reference lamp point and is adjacent to the reference lamp point;
the second adjacent reference lamp point is a lamp point which is positioned in an adjacent row with the reference lamp point and is closest to the reference lamp point and the first adjacent reference lamp point;
the first adjacent target lamp point is a gap position lamp point which is separated from the target lamp point by a screen gap and corresponds to the same line with the target lamp point;
the second adjacent target lamp point is a gap position lamp point which is positioned at the same side of the screen gap with the first adjacent target lamp point and is closest to the target lamp point and the first adjacent target lamp point.
Further, the distance parameter calculation strategy comprises:
forming a triangle by the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point, and calculating the distance between the reference lamp point and a preset point on the line segment where the first adjacent reference lamp point and the second adjacent reference lamp point are located as a reference distance parameter;
and forming a triangle by the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point, and calculating the distance between the target lamp point and preset points on the line segment where the first adjacent target lamp point and the second adjacent target lamp point are located as target distance parameters of the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point.
Further, the reference distance parameter is the distance between the reference lamp point and the midpoint of the line segment where the first adjacent reference lamp point and the second adjacent reference lamp point are located;
the target distance parameter is the distance between the target lamp point and the middle point of the line segment where the first adjacent target lamp point and the second adjacent target lamp point are located.
Further, the reference distance parameter is the distance from the reference lamp point to the line segment where the first adjacent reference lamp point and the second adjacent reference lamp point are located;
the target distance parameter is the distance between the target lamp point and the line segment where the first adjacent target lamp point and the second adjacent target lamp point are located.
Further, calculating a correction coefficient of the gap position lamp point by a reference distance parameter, a target distance parameter and a preset coefficient correction algorithm, including:
and setting the reference distance parameter as y, and setting the target distance parameter corresponding to the target lamp point as h, wherein the correction coefficient f = | y-h/y |/3 of the lamp point at the gap position.
Further, calculating a correction coefficient of the gap position lamp point by referring to the distance parameter, the target distance parameter and a preset coefficient correction algorithm, and further comprising:
judging whether the gap position lamp points exist in at least two triangles or not; if so,
summing the correction coefficients corresponding to the lamp points at the gap position, calculating an average value, and taking the average value as a final correction coefficient of the lamp points at the gap position;
if not, the correction coefficient of the gap position lamp point is not changed.
Further, obtain the lamp point correction coefficient of the full-screen lamp point of dysmorphism LED display screen to according to lamp point correction coefficient and the correction coefficient of gap position lamp point, rectify the gap position lamp point of dysmorphism LED display screen, include:
judging the size relation between the target distance parameter corresponding to each gap position lamp point and the reference distance parameter;
if the target distance parameter is greater than the reference distance parameter, the corrected correction coefficient of the gap position lamp point = the lamp point correction coefficient + the correction coefficient;
if the target distance parameter is smaller than the reference distance parameter, the corrected correction coefficient of the gap position lamp point = lamp point correction coefficient-correction coefficient;
correspondingly correcting the gap position lamp points of the special-shaped LED display screen according to the corrected correction coefficient;
and correcting the non-gap position lamp points of the special-shaped LED display screen according to the lamp point correction coefficients.
The invention also comprises a device for correcting the gap lamp point of the special-shaped LED display screen body, which comprises an image acquisition module, an image coordinate determination module, a distance calculation module, a correction coefficient calculation module and a correction module, wherein:
the image acquisition module is connected with the image coordinate determination module; the image acquisition module is used for acquiring an image of the special-shaped LED display screen;
the image coordinate determination module is connected with the image acquisition module and the distance calculation module; the image coordinate determination module is used for determining the image coordinates of the light points at the gap positions in the special-shaped LED display screen according to a preset light point calculation strategy; determining image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point;
the distance calculation module is connected with the image coordinate determination module and the correction coefficient calculation module; the distance calculation module is used for selecting any one non-slit position lamp point in the special-shaped LED display screen image as a reference lamp point, selecting a first adjacent reference lamp point and a second adjacent reference lamp point for the reference lamp point according to a preset lamp point selection strategy, and calculating a reference distance parameter of the reference lamp point according to the image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point and a preset distance parameter calculation strategy; sequentially selecting target lamp points from the gap position lamp points, selecting a first adjacent target lamp point and a second adjacent target lamp point for the target lamp points from the gap position lamp points according to a lamp point selection strategy, and calculating target distance parameters of the target lamp points, the first adjacent target lamp point and the second adjacent target lamp point through image coordinates of the target lamp points, the first adjacent target lamp point and the second adjacent target lamp point and a distance parameter calculation strategy;
the correction coefficient calculation module is connected with the distance calculation module and the correction module; the correction coefficient calculation module is used for calculating the correction coefficient of the gap position lamp point through the reference distance parameter, the target distance parameter and a preset coefficient correction algorithm;
the correction module is connected with the correction coefficient calculation module; the correction module is used for acquiring a lamp point correction coefficient of a full-screen lamp point of the special-shaped LED display screen and correcting the gap position lamp point of the special-shaped LED display screen according to the lamp point correction coefficient and the correction coefficient of the gap position lamp point.
According to the method and the device for correcting the slit lamp points of the special-shaped LED display screen body, any non-slit position lamp point is selected from an image of the special-shaped LED display screen body as a reference lamp point, the reference distance parameter of the reference lamp point is calculated, the target distance parameter of the slit position lamp point is calculated through the image coordinate of the slit position lamp point in the special-shaped LED display screen, and the correction coefficient of the slit position lamp point is calculated through the reference distance parameter and the target distance parameter, so that the slit position lamp point of the special-shaped LED display screen is corrected by combining the lamp point correction coefficient of the full-screen lamp point of the special-shaped LED display screen, the splicing type special-shaped LED display screen is repaired, the problem of bright lines or dark lines during display of the type of screen body is solved, the special-shaped LED display screen body has proper bright chroma, and the display effect of the screen is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a method for correcting a slit lamp spot of an irregular LED display screen according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for calibrating a slit lamp spot of a special-shaped LED display screen according to another embodiment of the present invention;
FIG. 3 is a schematic screen image diagram of a slit lamp point correction method for a special-shaped LED display screen body according to an embodiment of the present invention;
FIG. 4 is an enlarged schematic diagram of a screen slit of a slit lamp point correction method for a special-shaped LED display screen body according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for calibrating a slit lamp spot of a special-shaped LED display screen according to another embodiment of the present invention;
fig. 6 is a structural composition diagram of a slit lamp point correction device of the special-shaped LED display screen body according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The method for correcting the slit lamp points of the special-shaped LED display screen body is suitable for correcting the slit of the special-shaped LED display screen with the straight edge. As shown in fig. 1, the method comprises the following steps:
step S10: and acquiring an image of the special-shaped LED display screen, and determining the image coordinates of the light points at the gap position in the special-shaped LED display screen according to a preset light point calculation strategy.
The special-shaped LED display screen image can be acquired by shooting through a camera, and the specific acquisition process is not limited. And determining the image coordinates of the lamp points at the positions of the gaps in the special-shaped LED display screen according to the special-shaped LED display screen image. Because the resolution ratio of the special-shaped LED display screen is a known parameter and the pixel coordinates of the special-shaped LED display screen image are also known, the image coordinates of the lamp points in all the special-shaped LED display screens can be calculated.
Specifically, as shown in fig. 2, step S10 is implemented by the following steps:
step S101: and determining the edges and the top points of the special-shaped LED display screen in the special-shaped LED display screen image.
The invention takes an LED display screen with one parallelogram formed by splicing four parallelogram modules as an example, and explains the implementation of the following steps as shown in FIG. 3. It should be noted that the special-shaped LED display screen applicable to the present invention is not limited to a parallelogram, but may be a trapezoid, a pentagon, a hexagon, and the like.
As shown in fig. 3, the parallelogram-shaped LED display includes A, B, C, D vertices and four edges, AB, BC, CD, and DA, respectively.
Step S102: and establishing a rectangular coordinate system on the image of the special-shaped LED display screen, taking the vertex of the preset position as the origin of the rectangular coordinate system, and determining the image coordinates of all the vertexes of the special-shaped LED display screen.
As shown in fig. 3, the embodiment of the present invention uses the lower left corner vertex (vertex a) of the irregular LED display screen as the origin of the rectangular coordinate system, whose image coordinates are (0, 0), and determines the image coordinates of other vertices (vertex B, vertex C, and vertex D). For other shaped LED displays, the leftmost vertex can be used as the origin of the rectangular coordinate system.
Step S103: the method comprises the steps of filling the special-shaped LED display screen into a rectangle in a rectangular coordinate system according to the vertex of the special-shaped LED display screen, and calculating the image coordinates of the light points at the gap position in the special-shaped LED display screen according to the image coordinates of the rectangle, the light point coordinates of the special-shaped LED display screen and the image coordinates of the vertex.
The coordinate of the lamp point of the special-shaped LED display screen is a known quantity, the resolution of the special-shaped LED display screen is also a known quantity, so that assuming that the length from E to B is a, the length from B to C is m, the BD is connected, the distances from AD, AB and BD are known (the distance between two points can be calculated by the coordinate of two points), the angle BAD can be calculated, the angle EAB can be further obtained, the distance from AE and EB can be finally obtained by the angle EAB and AB, the distance from a can be calculated, the image coordinate from the B starting lamp point to the C ending lamp point and the image coordinate from the A starting lamp point to the D ending lamp point can be calculated by the a and m. And respectively calculating respective image coordinates of the lamp points at the gap position in the special-shaped LED display screen in the rectangular image by combining the lamp point coordinates of the special-shaped LED display screen.
Step S20: selecting any one non-gap position lamp point in the special-shaped LED display screen image as a reference lamp point, selecting a first adjacent reference lamp point and a second adjacent reference lamp point for the reference lamp point according to a preset lamp point selection strategy, and determining image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point.
This step may be combined with step S20 to determine the image coordinates of the reference lamp point, the first adjacent reference lamp point, and the second adjacent reference lamp point in the rectangular image respectively. The present embodiment does not limit the specific content of the lamp point selection policy, and only needs to be consistent with the manner in which the first adjacent target lamp point and the second adjacent target lamp point are selected for the target lamp point in step S40.
Step S30: and calculating the reference distance parameter of the reference lamp point through the image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point and a preset distance parameter calculation strategy.
The reference distance parameter calculated in this embodiment is used as one parameter for seam repair coefficient calculation in the subsequent step, and this embodiment does not limit the specific content of the distance parameter calculation strategy, but needs to be consistent with the way of calculating the target distance parameters for the target lamp point, the first adjacent target lamp point, and the second adjacent target lamp point in step S50.
Step S40: and selecting a first adjacent target lamp point and a second adjacent target lamp point for the target lamp point in the gap position lamp points according to a lamp point selection strategy.
Specifically, the lamp point selection strategy according to the embodiment of the present invention includes selecting a first adjacent reference lamp point and a second adjacent reference lamp point for the reference lamp point, and selecting a first adjacent target lamp point and a first adjacent target lamp point for the target lamp point, and specifically includes:
the first adjacent reference lamp point is a lamp point which is positioned in the same row with the reference lamp point and is adjacent to the reference lamp point; the second adjacent reference lamp point is a lamp point which is positioned in an adjacent row with the reference lamp point and is closest to the reference lamp point and the first adjacent reference lamp point. In this embodiment, the second adjacent reference lamp point is the lamp point "closest" to the reference lamp point and the first adjacent reference lamp point, and is generally the lamp point in the row above or below the reference lamp point, and corresponds to the lamp point in the same row and separated by one lamp point distance from the first adjacent reference lamp point.
The first adjacent target lamp point is a gap position lamp point which is separated from the target lamp point by a screen gap and corresponds to the same line with the target lamp point; the second adjacent target lamp point is a gap position lamp point which is positioned at the same side of the screen gap with the first adjacent target lamp point and is closest to the target lamp point and the first adjacent target lamp point. In this embodiment, the second adjacent target lamp point is a lamp point at a gap position "closest" to the target lamp point and the first adjacent target lamp point, and is a lamp point separated from the target lamp point by a screen gap (i.e., located on the same side of the screen gap as the first adjacent target lamp point), and corresponds to a lamp point in the same row and separated by a lamp point distance from the first adjacent target lamp point.
The reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point selected in the embodiment define a specific position relationship, the reference lamp point belongs to a non-gap position lamp point, the three lamp points belong to the same LED display module, and the distance between the three lamp points can be used as a reference distance for achieving a normal display effect of the LED display screen.
The first adjacent reference lamp point and the first adjacent reference lamp point of the reference lamp point can be selected in other modes, but the selection mode of the first adjacent target lamp point and the first adjacent target lamp point of the target lamp point is consistent with the first adjacent reference lamp point and the first adjacent target lamp point, so that the effect of correcting the screen gap can be achieved.
Step S50: and calculating target distance parameters of the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point through the image coordinates of the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point and a distance parameter calculation strategy.
Specifically, the distance parameter calculation strategy of the embodiment of the present invention includes:
and forming a triangle by the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point, and calculating the distance between the reference lamp point and a preset point on the line segment where the first adjacent reference lamp point and the second adjacent reference lamp point are located to be used as a reference distance parameter. Similarly, a triangle is formed by the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point, and the distance between the target lamp point and a preset point on the line segment where the first adjacent target lamp point and the second adjacent target lamp point are located is calculated and used as a target distance parameter of the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point.
In this embodiment, the preset points on the line segment where the first adjacent reference lamp point and the second adjacent reference lamp point are located, and the preset points on the line segment where the first adjacent target lamp point and the second adjacent target lamp point are located should be uniform position points, for example, a midpoint of a bottom side is selected, or an intersection point of a perpendicular line from a vertex of a triangle to the bottom side and the bottom side may be selected.
One embodiment is: the reference distance parameter is the distance between the reference lamp point and the middle point of the line segment where the first adjacent reference lamp point and the second adjacent reference lamp point are located; the target distance parameter is the distance between the target lamp point and the middle point of the line segment where the first adjacent target lamp point and the second adjacent target lamp point are located.
The other implementation mode is as follows: the reference distance parameter is the distance from the reference lamp point to the line segment where the first adjacent reference lamp point and the second adjacent reference lamp point are located (when the reference lamp point is taken as the vertex of the triangle, the distance from the vertex to the bottom edge, that is, the length of the perpendicular line from the vertex of the triangle to the bottom edge); the target distance parameter is the distance between the target lamp point and the line segment of the first adjacent target lamp point and the second adjacent target lamp point (when the target lamp point is used as the vertex of the triangle, the distance between the vertex and the bottom edge). Taking this embodiment as an example, as shown in fig. 4, which is an enlarged schematic diagram of the screen slit, taking the lamp point L1 as the target lamp point, the slit position lamp point which is separated from the lamp point L1 by the screen slit and corresponds to the same row (first row) as the lamp point L1 is the lamp point L2 as the first adjacent target lamp point, and the slit position lamp point which is located on the same side of the screen slit as the lamp point L2 and is closest to the target lamp point L1 and the lamp point L2 is the lamp point L4 as the second adjacent target lamp point; a triangle is formed by the lamp points L1, L2, and L4, and the distance from the target lamp point L1 to the line segment from the first adjacent target lamp point L2 to the second adjacent target lamp point L4, that is, the distance from the lamp point L1 to the bottom side is calculated as the target distance parameters of the target lamp point L1 and the first adjacent target lamp point L2 and the second adjacent target lamp point L4. Similarly, the target distance parameters of the target lamp point and the first and second adjacent target lamp points can be calculated when the lamp points L2, L3, L4, L5, and L6 are the target lamp points.
Through the calculation mode of the target distance parameter of the embodiment of the invention, the partial slit position lamp points have one target distance parameter, and the partial slit position lamp points have two or three target distance parameters, because the partial slit position lamp points only exist in one triangle, and the partial slit position lamp points exist in two or three triangles. As shown in fig. 4, the lamp point L2 exists only in the triangle formed by L1, L2 and L4; the lamp point L1 is arranged in a triangle formed by L1, L2 and L4 and a triangle formed by L1, L3 and L4, so that the lamp point L1 has two target distance parameters; and the lamp point L4 exists in the triangle formed by L1, L2 and L4, the triangle formed by L1, L3 and L4 and the triangle formed by L3, 4 and L6, so the lamp point L4 has three target distance parameters.
In fig. 4, each row of light points of the left module may have a slightly different height from each row of light points of the right module due to product reasons, because there is some deviation in the process of producing the special-shaped LED module, which involves cutting and physically splicing the rectangular module, and thus the triangle formed by the target light point, the first adjacent target light point and the second adjacent target light point in the embodiment of the present application appears in the situation in fig. 4.
Step S60: and calculating a correction coefficient of the gap position lamp point by a reference distance parameter, a target distance parameter and a preset coefficient correction algorithm.
Specifically, in step S60, calculating a correction coefficient of the gap position light point by referring to the distance parameter, the target distance parameter, and a preset coefficient correction algorithm, includes: and setting the reference distance parameter as y, and setting the target distance parameter corresponding to the target lamp point as h, wherein the correction coefficient f = | y-h/y |/3 of the lamp point at the gap position.
According to the above example with reference to fig. 4, the partial slit position lamp point has one correction coefficient, and the partial slit position lamp point has a plurality of correction coefficients, so step S60 according to the embodiment of the present invention further includes:
judging whether the gap position lamp points exist in at least two triangles or not; if so,
summing the correction coefficients corresponding to the lamp points at the gap position, calculating an average value, and taking the average value as a final correction coefficient of the lamp points at the gap position.
If not, the correction coefficient of the gap position lamp point is not changed.
In combination with the calculation process of the target distance parameter in step S50 of the above embodiment, the light point L2 in fig. 4 only exists in the triangle formed by L1, L2, and L4; the lamp point L1 is located in the triangle formed by L1, L2 and L4 and the triangle formed by L1, L3 and L4, so the lamp point L1 is used for 2 times when calculating the correction coefficient of the lamp point at each slit position; since the lamp point L4 is present in the triangle formed by L1, L2 and L4, the triangle formed by L1, L3 and L4, and the triangle formed by L3, L4 and L6, the lamp point L4 is used 3 times when calculating the correction coefficient for the lamp point at each slit position. Finally, when the correction coefficient of each slit position lamp point is calculated in step S60, the lamp point L2 can only obtain one correction coefficient, the lamp point L1 has two correction coefficients, and the lamp point L4 has three correction coefficients, so that in this embodiment, the two correction coefficients of the lamp point L1 are summed and then averaged, and the obtained value is used as the final correction coefficient of the lamp point L1, and for the lamp point L4, the three correction coefficients are also summed and then averaged, and the obtained value is used as the final correction coefficient of the lamp point L4, and the lamp point L2 has only one correction coefficient, so that the correction coefficient of the lamp point is not changed.
After the correction coefficients of all the slit position lamp points are calculated, step S70 is executed.
Step S70: and acquiring a lamp point correction coefficient of the full-screen lamp point of the special-shaped LED display screen, and correcting the gap position lamp point of the special-shaped LED display screen according to the lamp point correction coefficient and the correction coefficient of the gap position lamp point.
As shown in fig. 5, step S70 of the embodiment of the present invention includes:
step S701: and judging the size relation between the target distance parameter corresponding to each gap position lamp point and the reference distance parameter.
If the target distance parameter is greater than the reference distance parameter, the gap formed by the image is a dark line, and step S702 is executed: the corrected correction coefficient of the gap position lamp point = lamp point correction coefficient + correction coefficient;
if the target distance parameter is smaller than the reference distance parameter, the gap formed by the image is a bright line, and step S703 is executed: the corrected correction coefficient = lamp point correction coefficient-correction coefficient for the gap position lamp point;
step S704: and correspondingly correcting the gap position lamp points of the special-shaped LED display screen according to the corrected correction coefficient.
Step S705: and correcting the non-gap position lamp points of the special-shaped LED display screen according to the lamp point correction coefficients.
In this embodiment, the non-slit position lamp points are directly corrected according to the obtained lamp point correction coefficients in the above manner, and for the slit position lamp points, the algorithm of the corrected correction coefficients is determined by comparing the target distance parameter corresponding to each lamp point with the reference distance parameter, so as to perform corresponding correction on the slit position lamp points.
The embodiment of the invention also comprises a device for correcting the slit lamp points of the special-shaped LED display screen body, as shown in FIG. 6, the device comprises an image acquisition module 101, an image coordinate determination module 102, a distance calculation module 103, a correction coefficient calculation module 104 and a correction module 105, wherein:
the image acquisition module 101 is connected with the image coordinate determination module 102; the image acquisition module 101 is used for acquiring an image of the special-shaped LED display screen;
the image coordinate determination module 102 is connected with the image acquisition module 101 and the distance calculation module 103; the image coordinate determination module 102 is configured to determine image coordinates of a light point at a gap position in the special-shaped LED display screen according to a preset light point calculation strategy; determining image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point;
the distance calculation module 103 is connected with the image coordinate determination module 102 and the correction coefficient calculation module 104; the distance calculation module 103 is used for selecting any one non-slit position lamp point in the special-shaped LED display screen image as a reference lamp point, selecting a first adjacent reference lamp point and a second adjacent reference lamp point for the reference lamp point according to a preset lamp point selection strategy, and calculating a reference distance parameter of the reference lamp point according to the image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point and a preset distance parameter calculation strategy; sequentially selecting target lamp points from the gap position lamp points, selecting a first adjacent target lamp point and a second adjacent target lamp point for the target lamp points from the gap position lamp points according to a lamp point selection strategy, and calculating target distance parameters of the target lamp points, the first adjacent target lamp point and the second adjacent target lamp point through image coordinates of the target lamp points, the first adjacent target lamp point and the second adjacent target lamp point and a distance parameter calculation strategy;
a correction coefficient calculation module 104 connected to the distance calculation module 103 and the correction module 105; the correction coefficient calculation module 104 is configured to calculate a correction coefficient of the gap position lamp point by referring to the distance parameter, the target distance parameter, and a preset coefficient correction algorithm;
the correction module 105 is connected with the correction coefficient calculation module 104; the correction module 105 is configured to obtain a lamp point correction coefficient of a full-screen lamp point of the special-shaped LED display screen, and correct the gap position lamp point of the special-shaped LED display screen according to the lamp point correction coefficient and the correction coefficient of the gap position lamp point.
The slit lamp point correction device of the special-shaped LED display screen body according to the embodiment of the present invention can be explained and implemented by comparing the related embodiments of the slit lamp point correction method of the special-shaped LED display screen body, and will not be described herein again.
According to the slit lamp point correction method and device for the special-shaped LED display screen body, any non-slit position lamp point is selected from an image of the special-shaped LED display screen to serve as a reference lamp point, the reference distance parameter of the reference lamp point is calculated, the target distance parameter of the slit position lamp point is calculated through the image coordinate of the slit position lamp point in the special-shaped LED display screen, and the correction coefficient of the slit position lamp point is calculated through the reference distance parameter and the target distance parameter.
The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.
Claims (10)
1. A slit lamp point correction method of a special-shaped LED display screen body is characterized by comprising the following steps:
acquiring an image of the special-shaped LED display screen, and determining image coordinates of light points at the position of a gap in the special-shaped LED display screen according to a preset light point calculation strategy;
selecting any one non-gap position lamp point in the special-shaped LED display screen image as a reference lamp point, simultaneously selecting a first adjacent reference lamp point and a second adjacent reference lamp point for the reference lamp point according to a preset lamp point selection strategy, and determining image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point;
calculating a reference distance parameter of the reference lamp point according to the image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point and a preset distance parameter calculation strategy;
sequentially selecting target lamp points from the gap position lamp points, and selecting a first adjacent target lamp point and a second adjacent target lamp point for the target lamp points from the gap position lamp points according to the lamp point selection strategy;
calculating target distance parameters of the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point according to the image coordinates of the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point and the distance parameter calculation strategy;
calculating a correction coefficient of the gap position lamp point through the reference distance parameter, the target distance parameter and a preset coefficient correction algorithm;
and acquiring a lamp point correction coefficient of the full-screen lamp point of the special-shaped LED display screen, and correcting the gap position lamp point of the special-shaped LED display screen according to the lamp point correction coefficient and the correction coefficient of the gap position lamp point.
2. The method for correcting the slit lamp points of the special-shaped LED display screen body according to claim 1, wherein the step of determining the image coordinates of the slit position lamp points in the special-shaped LED display screen according to a preset lamp point calculation strategy comprises the following steps:
determining the edges and the top points of the special-shaped LED display screen in the special-shaped LED display screen image;
establishing a rectangular coordinate system on the special-shaped LED display screen image, taking the vertex of a preset position as the origin of the rectangular coordinate system, and determining the image coordinates of all the vertexes of the special-shaped LED display screen;
and according to the vertex of the special-shaped LED display screen, the special-shaped LED display screen is filled into a rectangle in the rectangular coordinate system, and according to the image coordinates of the rectangle, the lamp point coordinates of the special-shaped LED display screen and the image coordinates of the vertex, the image coordinates of the lamp points at the gap position in the special-shaped LED display screen are calculated.
3. The method for correcting the slit lamp points of the special-shaped LED display screen body as claimed in claim 1, wherein the lamp point selection strategy comprises:
the first adjacent reference lamp point is a lamp point which is positioned in the same row with the reference lamp point and is adjacent to the reference lamp point;
the second adjacent reference lamp point is a lamp point which is positioned in an adjacent row with the reference lamp point and is closest to the reference lamp point and the first adjacent reference lamp point;
the first adjacent target lamp point is a gap position lamp point which is separated from the target lamp point by a screen gap and corresponds to the same row with the target lamp point;
the second adjacent target lamp point is a gap position lamp point which is positioned at the same side of the screen gap as the first adjacent target lamp point and is closest to the target lamp point and the first adjacent target lamp point.
4. The method for correcting the slit lamp spot of the special-shaped LED display screen body as claimed in claim 1, wherein the distance parameter calculation strategy comprises:
forming a triangle by the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point, and calculating the distance between the reference lamp point and a preset point on a line segment where the first adjacent reference lamp point and the second adjacent reference lamp point are located as the reference distance parameter;
and forming a triangle by the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point, and calculating the distance between the target lamp point and a preset point on a line segment where the first adjacent target lamp point and the second adjacent target lamp point are located as the target distance parameters of the target lamp point, the first adjacent target lamp point and the second adjacent target lamp point.
5. The method for correcting the slit lamp point of the special-shaped LED display screen body as claimed in claim 4, wherein the reference distance parameter is a distance between the reference lamp point and a midpoint of a line segment where the first adjacent reference lamp point and the second adjacent reference lamp point are located;
the target distance parameter is the distance between the target lamp point and the middle point of the line segment where the first adjacent target lamp point and the second adjacent target lamp point are located.
6. The method according to claim 4, wherein the reference distance parameter is a distance from the reference lamp point to a line segment where the first adjacent reference lamp point and the second adjacent reference lamp point are located;
the target distance parameter is the distance between the target lamp point and the line segment where the first adjacent target lamp point and the second adjacent target lamp point are located.
7. The method for correcting the slit lamp point of the special-shaped LED display screen body as claimed in claim 1, wherein the calculating of the correction coefficient of the slit position lamp point through the reference distance parameter, the target distance parameter and a preset coefficient correction algorithm comprises:
setting the reference distance parameter as y, and setting the target distance parameter corresponding to the target lamp point as h, wherein the correction coefficient f = | y-h/y |/3 of the gap position lamp point.
8. The method as claimed in claim 7, wherein the calculating of the correction coefficient of the slit position lamp point by the reference distance parameter, the target distance parameter and a preset coefficient correction algorithm further comprises:
judging whether the gap position lamp points exist in at least two triangles or not; if so,
summing the correction coefficients corresponding to the lamp points at the gap position, calculating an average value, and taking the average value as a final correction coefficient of the lamp points at the gap position;
if not, the correction coefficient of the gap position lamp point is not changed.
9. The method for correcting the slit lamp points of the special-shaped LED display screen body according to claim 1, wherein the step of obtaining the lamp point correction coefficient of the full-screen lamp points of the special-shaped LED display screen and correcting the slit position lamp points of the special-shaped LED display screen according to the lamp point correction coefficient and the correction coefficient of the slit position lamp points comprises the following steps:
judging the size relation between the target distance parameter corresponding to each gap position lamp point and the reference distance parameter;
if the target distance parameter is greater than the reference distance parameter, the corrected correction coefficient of the gap position lamp point = the lamp point correction coefficient + the correction coefficient;
if the target distance parameter is smaller than the reference distance parameter, the corrected correction coefficient of the gap position lamp point = lamp point correction coefficient-correction coefficient;
correspondingly correcting the gap position lamp points of the special-shaped LED display screen according to the corrected correction coefficient;
and correcting the non-gap position lamp points of the special-shaped LED display screen according to the lamp point correction coefficient.
10. The utility model provides a gap lamp point correcting unit of dysmorphism LED display screen body, its characterized in that, the device includes image acquisition module, image coordinate determination module, distance calculation module, correction coefficient calculation module and correction module, wherein:
the image acquisition module is connected with the image coordinate determination module; the image acquisition module is used for acquiring an image of the special-shaped LED display screen;
the image coordinate determination module is connected with the image acquisition module and the distance calculation module; the image coordinate determination module is used for determining the image coordinates of the light points at the gap positions in the special-shaped LED display screen according to a preset light point calculation strategy; determining the image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point;
the distance calculation module is connected with the image coordinate determination module and the correction coefficient calculation module; the distance calculation module is used for selecting any one non-slit position lamp point in the special-shaped LED display screen image as a reference lamp point, selecting a first adjacent reference lamp point and a second adjacent reference lamp point for the reference lamp point according to a preset lamp point selection strategy, and calculating a reference distance parameter of the reference lamp point according to the image coordinates of the reference lamp point, the first adjacent reference lamp point and the second adjacent reference lamp point and a preset distance parameter calculation strategy; sequentially selecting target lamp points from the gap position lamp points, selecting a first adjacent target lamp point and a second adjacent target lamp point for the target lamp points from the gap position lamp points according to the lamp point selection strategy, and calculating target distance parameters of the target lamp points, the first adjacent target lamp point and the second adjacent target lamp point according to the image coordinates of the target lamp points, the first adjacent target lamp point and the second adjacent target lamp point and the distance parameter calculation strategy;
the correction coefficient calculation module is connected with the distance calculation module and the correction module; the correction coefficient calculation module is used for calculating the correction coefficient of the gap position lamp point through the reference distance parameter, the target distance parameter and a preset coefficient correction algorithm;
the correction module is connected with the correction coefficient calculation module; the correction module is used for acquiring a lamp point correction coefficient of a full-screen lamp point of the special-shaped LED display screen and correcting the lamp point at the gap position of the special-shaped LED display screen according to the lamp point correction coefficient and the correction coefficient of the lamp point at the gap position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210190127.9A CN114283097B (en) | 2022-03-01 | 2022-03-01 | Slit lamp point correction method and device for special-shaped LED display screen body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210190127.9A CN114283097B (en) | 2022-03-01 | 2022-03-01 | Slit lamp point correction method and device for special-shaped LED display screen body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114283097A true CN114283097A (en) | 2022-04-05 |
| CN114283097B CN114283097B (en) | 2022-05-17 |
Family
ID=80882165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210190127.9A Active CN114283097B (en) | 2022-03-01 | 2022-03-01 | Slit lamp point correction method and device for special-shaped LED display screen body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114283097B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114999335A (en) * | 2022-06-10 | 2022-09-02 | 长春希达电子技术有限公司 | LED spliced screen seam repairing method based on ultra-wide band and one-dimensional envelope peak |
| CN115862530A (en) * | 2023-03-02 | 2023-03-28 | 长春希达电子技术有限公司 | Correction method and device for special-shaped LED screen, electronic equipment and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002195812A (en) * | 2000-10-20 | 2002-07-10 | Matsushita Electric Ind Co Ltd | Range finder device, three-dimensional measuring method and light source device |
| CN103578429A (en) * | 2013-11-01 | 2014-02-12 | 深圳市奥拓电子股份有限公司 | LED display screen system and rectifying method for bright and dark lines thereof |
| US20180227555A1 (en) * | 2015-08-06 | 2018-08-09 | Philips Lighting Holding B.V. | Lamp control |
| CN108630142A (en) * | 2018-05-13 | 2018-10-09 | 上海诣阔软件有限公司 | A kind of correction LED display piece method |
| CN112419966A (en) * | 2020-11-17 | 2021-02-26 | 长春希达电子技术有限公司 | Method for correcting pixel brightness of nonstandard spacing between display units |
-
2022
- 2022-03-01 CN CN202210190127.9A patent/CN114283097B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002195812A (en) * | 2000-10-20 | 2002-07-10 | Matsushita Electric Ind Co Ltd | Range finder device, three-dimensional measuring method and light source device |
| CN103578429A (en) * | 2013-11-01 | 2014-02-12 | 深圳市奥拓电子股份有限公司 | LED display screen system and rectifying method for bright and dark lines thereof |
| US20180227555A1 (en) * | 2015-08-06 | 2018-08-09 | Philips Lighting Holding B.V. | Lamp control |
| CN108630142A (en) * | 2018-05-13 | 2018-10-09 | 上海诣阔软件有限公司 | A kind of correction LED display piece method |
| CN112419966A (en) * | 2020-11-17 | 2021-02-26 | 长春希达电子技术有限公司 | Method for correcting pixel brightness of nonstandard spacing between display units |
Non-Patent Citations (2)
| Title |
|---|
| GORDON ELGER .ET .AL: "Inline thermal transient testing of high power LED modules for solder joint quality control", 《2011 IEEE 61ST ELECTRONIC COMPONENTS AND TECHNOLOGY CONFERENCE (ECTC)》 * |
| 郑瑞涛: "基于HVS的LED显示屏拼接亮暗线修正方法", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114999335A (en) * | 2022-06-10 | 2022-09-02 | 长春希达电子技术有限公司 | LED spliced screen seam repairing method based on ultra-wide band and one-dimensional envelope peak |
| CN114999335B (en) * | 2022-06-10 | 2023-08-15 | 长春希达电子技术有限公司 | LED spliced screen seam repairing method based on ultra-wideband and one-dimensional envelope peak value |
| CN115862530A (en) * | 2023-03-02 | 2023-03-28 | 长春希达电子技术有限公司 | Correction method and device for special-shaped LED screen, electronic equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114283097B (en) | 2022-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114283097B (en) | Slit lamp point correction method and device for special-shaped LED display screen body | |
| CN108615499B (en) | Display optimization and display driving method and device, display device and storage medium | |
| CN109495729B (en) | Projection picture correction method and system | |
| US7167645B2 (en) | Image processing system, projector, information storage medium, and image processing method | |
| US7102637B2 (en) | Method of seamless processing for merging 3D color images | |
| JP2020522726A (en) | Display panel unevenness correction method and display panel | |
| CN107221306A (en) | Method, device and the display device of brightness of image in correction splicing device screen | |
| CN110290365B (en) | Edge fusion method | |
| CN108234824A (en) | Shadow correction detection parameters determine, correct detection method and device, storage medium, fisheye camera | |
| CN111553870B (en) | Image processing method based on distributed system | |
| CN114267267B (en) | Bright and dark seam repairing method, device and system for virtual pixel LED display screen | |
| CN111258527A (en) | Display adjustment method, device, equipment and storage medium | |
| CN113257167A (en) | Display picture compensation method | |
| CN113257181B (en) | LED screen correction image acquisition method, correction method, acquisition device and correction system | |
| CN111357284B (en) | Method for automatically restoring calibration state of projection system | |
| CN115995208B (en) | Lamp positioning method, correction method and device for spherical LED display screen | |
| CN113658082A (en) | Method for repairing TDOM (time difference of arrival) shielded area of five-lens oblique camera | |
| JP2006033672A (en) | Curved surface multi-screen projection method, and its device | |
| CN115035847A (en) | LED screen coefficient correction method, device and equipment | |
| CN115953981A (en) | Method for positioning special-shaped plane screen lamp points and method for acquiring brightness information | |
| CN115034986A (en) | Three-dimensional video fusion method for performing camera modeling based on single monitoring image | |
| CN112565723B (en) | Image fusion band display control method, device and system | |
| WO2012108003A1 (en) | Projector system and video correction method | |
| CN110428793B (en) | Brightness correction system and method | |
| CN112565722A (en) | Fusion zone adjusting method, device and system based on image fusion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |