CN112331159B - Fast matching correction device and method for display - Google Patents
Fast matching correction device and method for display Download PDFInfo
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- CN112331159B CN112331159B CN202011309573.4A CN202011309573A CN112331159B CN 112331159 B CN112331159 B CN 112331159B CN 202011309573 A CN202011309573 A CN 202011309573A CN 112331159 B CN112331159 B CN 112331159B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
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Abstract
The invention discloses a display quick matching correction device and a correction method thereof, wherein the correction method comprises the following steps: acquiring original gamma data, maximum target brightness and contrast of a display; adjusting a display backlight to set a maximum brightness of the display to a maximum target brightness; receiving display brightness data collected by a color detector; calculating standard gamma brightness according to the brightness data of the display; calculating new gamma data according to the standard gamma brightness; and writing the new gamma data into the display. The invention is suitable for the medical display, and the influence of gamma on the display effect directly influences the judgment of the doctor on the illness state of the patient, so the invention has very good application value in the field of medical display.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display quick matching correction device and a correction method thereof.
Background
Compared with a common display, the medical display has better stability, but the brightness is attenuated along with time, so that the difference between the brightness curve of the display and the standard brightness curve is larger and larger, the display effect is poorer and poorer, and the correction of the medical display is very important.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a display quick matching correction device and a correction method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, a display fast-matching correction apparatus includes a color detector and a computer; the color detector is arranged in front of a display screen of the display and used for collecting brightness data of the display screen of the display; and the computer is in communication connection with the color detector and the Scalar chip of the display.
The further technical scheme is as follows: the color detector is an x-rite color detector.
The further technical scheme is as follows: the computer is a PC.
The further technical scheme is as follows: and the PC is in communication connection with the Scalar chip of the display through the adapter plate.
In a second aspect, a calibration method of the above calibration apparatus for fast matching of displays includes:
acquiring original gamma data, maximum target brightness and contrast of a display;
adjusting a display backlight to set a maximum brightness of the display to a maximum target brightness;
receiving display brightness data collected by a color detector;
calculating standard gamma brightness according to the brightness data of the display;
calculating new gamma data according to the standard gamma brightness;
and writing the new gamma data into the display.
The further technical scheme is as follows: the step of calculating the standard gamma brightness according to the brightness data of the display specifically comprises:
analyzing luminance data of 0-255 orders;
and calculating the gamma brightness of the n-th order standard through a first calculation formula and a second calculation formula according to the brightness data of 0-255 th order.
The further technical scheme is as follows: the first calculation formula is:
wherein, Lv 'min is standard minimum brightness, Lv' max is 255 th-order brightness, and C is contrast;
the second calculation formula is:
wherein, Lv ' min is the standard minimum brightness, Lv ' max is the 255 th-order brightness, i is the order value to represent the ith order, n is the total order, x is the gamma value corresponding to gamma, and Lv ' i is the standard brightness value of the ith order.
The further technical scheme is as follows: the step of calculating new gamma data according to the standard gamma brightness specifically comprises the following steps:
inquiring the interval of the actual gamma brightness corresponding to the gamma brightness of each standard step;
and differentiating the gamma data value corresponding to the gamma brightness of each standard order from the interval through a third calculation formula to obtain new gamma data of n orders.
The further technical scheme is as follows: the third calculation formula is:
wherein, L ' V is standard gamma brightness value, Lv [ i ] is actual gamma brightness value of ith order, Lv [ i +1] is actual gamma brightness value of i +1 order, and Lv [ i ] < L ' V < Lv [ i +1], V [ i ] is original gamma data value corresponding to ith order, V [ i +1] is original gamma data value corresponding to i +1 order, V ' is new gamma data value.
The further technical scheme is as follows: after the step of writing the new gamma data into the display, the method further comprises the following steps:
detecting whether the display effect meets the correction requirement or not;
if the correction requirement is met, the correction is finished;
and if the gamma data do not meet the correction requirement, writing the original gamma data into the display, executing the step of adjusting the backlight of the display and setting the maximum brightness of the display as the maximum target brightness.
Compared with the prior art, the invention has the beneficial effects that: the invention collects the brightness data of the display by adopting the x-rite color detector, obtains new accurate and effective gamma data according to the special relation between the brightness of the gamma standard and the original gamma data of the display, and realizes the correction of the gamma curve of the display by replacing the original gamma data with the new gamma data.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more apparent, the following detailed description will be given of preferred embodiments.
Drawings
FIG. 1 is a diagram of the hardware architecture of the display fast matching calibration apparatus of the present invention;
FIG. 2 is a graph of the JND luminance shift rate of each JND in an embodiment of the correction method for the display quick matching correction apparatus of the present invention;
FIG. 3 is a first flowchart illustrating a calibration method of the display quick-match calibration apparatus according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a second embodiment of a calibration method for a display quick-match calibration apparatus according to the present invention;
FIG. 5 is a flowchart illustrating a third exemplary embodiment of a calibration method of the display fast-matching calibration apparatus according to the present invention.
Detailed Description
In order to more fully understand the technical content of the present invention, the technical solution of the present invention will be further described and illustrated with reference to the following specific embodiments, but not limited thereto.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of 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.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," some embodiments, "" an example, "" a specific example, "" or "some examples," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.
The invention is applied to the field of displays, in particular to the field of medical display, because the display effect of the medical display directly influences the judgment of doctors on the illness state of patients, although the stability of the medical display is better compared with that of a common display, the brightness of the medical display is attenuated along with time, so that the difference between the brightness curve of the display and the standard brightness curve is larger and larger, the display effect is poorer and poorer, and the correction of the medical display is of great importance.
The display can be kept stable in brightness at any time in the service life by correcting the display, so that the display effect of the display is stable.
The invention provides a display quick matching correction device and a correction method thereof, and the correction method is generally divided into a built-in Sensor correction method and an external Sensor correction method.
Referring to fig. 1, an embodiment of the present invention provides a display fast matching calibration apparatus, which includes a color detector and a computer; the color detector is installed in front of the display screen of the display and is used for collecting the brightness data of the display screen of the display 100; the computer is in communication connection with the color detector and the Scalar chip of the display. The computer is a PC 102, and the PC 102 is connected with the Scalar chip 104 of the display in a communication way through the adapter board.
Specifically, the display quick matching correction device belongs to an external Sensor correction device, and is different from a built-in Sensor correction principle and method. Preferably, the color detector is an x-rite color detector 101. For a complex environment where a display is placed, the characteristics of small size, portability and easiness in placement of the x-rite color detector 101 are utilized, the brightness of any position on a screen of the display can be collected, and the x-rite color detector can be well suitable for various comprehensive and complex application environments at present to solve the problem that the collected brightness data has errors due to different display characteristics of the display caused by different liquid crystal ion offsets. And the characteristic that the x-rite color detector 101 is sensitive to light can be utilized, so that the collected data is more accurate and precise.
Referring to fig. 3, an embodiment of the present invention further provides a calibration method of a display fast-matching calibration apparatus, wherein the method for calibrating a display by using the display fast-matching calibration apparatus includes the following steps:
s10, acquiring the original gamma data, the maximum target brightness and the contrast of the display, and executing the step S20.
And acquiring the original gamma data, the maximum target brightness and the contrast of the display from the display through the PC.
S20, adjusting the display backlight, setting the maximum brightness of the display as the maximum target brightness, and executing the step S30.
S30, receiving the display brightness data collected by the color detector, and executing S40.
The x-rite color detector collects 0-255 order brightness data of the display and transmits the data to the PC.
S40, calculating the standard gamma brightness according to the display brightness data, and executing the next step S50.
Referring to fig. 4, step S40 specifically includes the following steps:
s401, analyzing 0-255-order brightness data, and executing the step S402;
s402, calculating n-order standard gamma brightness through a first calculation formula and a second calculation formula according to 0-255-order brightness data.
After the PC receives 0-255-order brightness data of the display acquired by the x-rite color detector, the gamma brightness of the n-order standard is calculated according to the first calculation formula and the second calculation formula.
Specifically, the first calculation formula is:
wherein, Lv 'min is standard minimum brightness, Lv' max is 255 th-order brightness, and C is contrast;
the second calculation formula is:
wherein, Lv ' min is the standard minimum brightness, Lv ' max is the 255 th-order brightness, i is the order value to represent the ith order, n is the total order, x is the gamma value corresponding to gamma, and Lv ' i is the standard brightness value of the ith order.
S50, calculating new gamma data according to the standard gamma brightness, and executing the next step S60.
Referring to fig. 5, step S50 specifically includes the following steps:
s501, inquiring an interval where actual gamma brightness corresponding to each-order standard gamma brightness is located, and executing a step S502;
and S502, differentiating the gamma data value corresponding to the gamma brightness of each standard order from the interval through a third formula to obtain new gamma data of n orders.
Because 256 groups of original gamma data exist in the actual 0-255-order brightness and correspond to the original gamma data one by one, the interval where each-order standard brightness corresponds to the actual brightness is found out, and the value of the gamma data corresponding to each-order standard brightness is differentiated from the interval according to a third calculation formula, so that n-order new gamma data is obtained.
Specifically, the third calculation formula is:
wherein, L ' V is standard gamma brightness value, Lv [ i ] is actual gamma brightness value of ith order, Lv [ i +1] is actual gamma brightness value of i +1 order, and Lv [ i ] < L ' V < Lv [ i +1], V [ i ] is original gamma data value corresponding to ith order, V [ i +1] is original gamma data value corresponding to i +1 order, V ' is new gamma data value.
S60, writing the new gamma data into the display, and executing the step S70.
S70, detecting whether the display effect meets the correction requirement, if yes, S80, the correction is completed, if no, S90, the original gamma data is written into the display, and step S20 is executed.
Collecting the brightness of the display after burning new gamma data, calculating standard brightness according to a second calculation formula, comparing the brightness deviation rate of each JND of the actual brightness with the brightness deviation rate of each JND of the standard brightness, wherein the error of the two is within +/-10%, the correction requirement is met, the correction operation of the display is finished, otherwise, the original gamma data is written into the display, and the display can be corrected again. The JND value corresponding to each standard brightness is calculated according to a fourth calculation formula, and then the brightness offset rate of each JND of each actual brightness and the brightness offset rate of each JND of each standard brightness are calculated according to a fifth calculation formula, so that a brightness offset rate curve graph of each JND shown in fig. 2 is obtained, wherein 201 is a brightness offset rate curve of each JND with standard brightness + 10%, 202 is a brightness offset rate curve of each JND of standard brightness, 203 is a brightness offset rate curve of each JND of actual brightness after correction, 204 is a brightness offset rate curve of each JND with standard brightness-10%, and 203 represents that the correction requirement is met between a curve 201 and a curve 204.
Specifically, the fourth calculation formula is:
J＝iA+iB*log10Lv+iC*(log10Lv)2+iD*(log10Lv)3+iE*(log10Lv)4+iF*(log10Lv)5+iG*(log10Lv)6+iH*(log10Lv)7+iI*(log10Lv)8(ii) a Where iA is 71.498068, iB is 94.593053, iC is 41.912053, iD is 9.8247004, iE is 0.28175407, iF is 1.1878455, iG is 0.18014349, iH is 0.14710899, iI is 0.017046845, J is the value of JND, and Lv is the luminance value.
The fifth calculation formula is:
where v is a luminance shift rate of each JND, Lv [ i ] is ith order luminance, Lv [ i +1] is ith +1 th order luminance, J [ i ] is a value of ith order JND, and J [ i +1] is a value of ith +1 th order JND.
The technical contents of the present invention are further illustrated by the examples only for the convenience of the reader, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.
Claims (2)
1. A correction method of a display quick matching correction device is characterized in that the device comprises a color detector and a computer; the color detector is arranged in front of a display screen of the display and used for collecting brightness data of the display screen of the display; the computer is in communication connection with the color detector and a Scalar chip of the display; the method comprises the following steps:
acquiring original gamma data, maximum target brightness and contrast of a display;
adjusting a display backlight to set a maximum brightness of the display to a maximum target brightness;
receiving display brightness data collected by a color detector;
calculating standard gamma brightness according to the brightness data of the display;
calculating new gamma data according to the standard gamma brightness;
writing the new gamma data into the display;
the step of calculating the standard gamma brightness according to the brightness data of the display specifically comprises:
analyzing luminance data of 0-255 orders;
calculating n-order standard gamma brightness through a first calculation formula and a second calculation formula according to 0-255-order brightness data;
the first calculation formula is:
wherein, Lv 'min is standard minimum brightness, Lv' max is 255 th-order brightness, and C is contrast;
the second calculation formula is:
wherein, Lv ' min is standard minimum brightness, Lv ' max is 255 th-order brightness, i is an order value to represent the ith order, n is a total order, x is a gamma value corresponding to gamma, and Lv ' [ i ] is the standard brightness value of the ith order;
the step of calculating new gamma data according to the standard gamma brightness specifically comprises the following steps:
inquiring the interval of the actual gamma brightness corresponding to the gamma brightness of each standard step;
differentiating the value of gamma data corresponding to the gamma brightness of each standard order from the interval through a third calculation formula to obtain new gamma data of n orders;
the third calculation formula is:
wherein, L ' V is standard gamma brightness value, Lv [ i ] is actual gamma brightness value of ith order, Lv [ i +1] is actual gamma brightness value of i +1 order, and Lv [ i ] < L ' V < Lv [ i +1], V [ i ] is original gamma data value corresponding to ith order, V [ i +1] is original gamma data value corresponding to i +1 order, V ' is new gamma data value.
2. The method of claim 1, wherein after the step of writing the new gamma data to the display, the method further comprises:
detecting whether the display effect meets the correction requirement or not;
if the correction requirement is met, the correction is finished;
and if the gamma data do not meet the correction requirement, writing the original gamma data into the display, executing the step of adjusting the backlight of the display and setting the maximum brightness of the display as the maximum target brightness.
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