CN110534072B - Real-time correction method for portable diagnosis display - Google Patents
Real-time correction method for portable diagnosis display Download PDFInfo
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- CN110534072B CN110534072B CN201910660556.6A CN201910660556A CN110534072B CN 110534072 B CN110534072 B CN 110534072B CN 201910660556 A CN201910660556 A CN 201910660556A CN 110534072 B CN110534072 B CN 110534072B
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The invention discloses a real-time correction method of a portable diagnosis display, which automatically generates display lookup table data of the portable diagnosis display according to a calculation formula of a standard curve and a user-defined curve by acquiring characteristic data of the portable diagnosis display and judging whether ambient light and screen brightness are adjusted or not and sends the display lookup table data to the portable diagnosis display, thereby achieving the purpose of optimizing the imaging of the portable diagnosis display. The invention can ensure that the portable diagnosis display supports the switching of multiple curves, ensures that the portable diagnosis display meets the diagnosis requirement of medical images, ensures that the color is presented more according to the requirement of human eyes, and ensures that a better film reading effect can be provided for doctors in various environments of a film reading room, thereby improving the diagnosis rate of the doctors, reducing the misdiagnosis rate of difficult and complicated diseases and further improving the diagnosis efficiency of the doctors.
Description
Technical Field
The invention relates to a real-time correction method of a portable diagnosis display, belonging to the technical field of medical display.
Background
Along with the development of science and technology, the display also develops towards being portable, has brought very big convenience for mobile office, liberates the doctor from the office, has more reduced the emergence of occupational disease.
Disclosure of Invention
The invention aims to provide a real-time correction method of a portable diagnosis display, which monitors the brightness change of the portable diagnosis display through an ambient light sensor and a front sensor, reads the currently adopted curve information, carries out real-time curve calibration and correction and displays the real-time correction result.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
a method for real-time calibration of a portable diagnostic display, comprising the steps of:
1) automatically starting correction when the portable diagnosis display is started;
2) performing feature acquisition on the portable diagnostic display;
3) obtaining all characteristic data through interpolation calculation;
4) judging whether the ambient light changes or not, and judging whether the screen brightness of the portable diagnosis display changes or not;
5) when the ambient light changes or the screen brightness of the portable diagnosis display changes, reading curve information adopted by the current portable diagnosis display;
6) calibrating the curve according to the curve target value, and storing the curve into a display lookup table;
7) the acquired display lookup table is sent to a storage mechanism of the portable diagnosis display;
8) the portable diagnosis display displays the image according to the transmitted display lookup table;
8) returning to the step 4) to continue real-time correction.
The aforementioned collection tool is a color analyzer.
The aforementioned characteristic data acquisition is: the portable diagnosis display device collects luminance values (Y) corresponding to 256 gray levels, and the color portable diagnosis display device collects tristimulus values (X, Y, Z) corresponding to 256 red (R), green (G), and blue (B).
In the step 3), the acquired feature data is interpolated according to the bit depth of the portable diagnosis display, and the number corresponding to the bit depth is interpolated.
In the step 4), whether the ambient light changes is detected in real time by the ambient light sensor, and whether the screen brightness of the portable diagnostic display changes is detected in real time by the front sensor.
In the aforementioned step 6), the first step is carried out,
the target value of the curve is calculated for the standard curve by using the following standard calculation formula:
L＝10jnd
where L is the luminance, j is the jnd (just noticeable difference) value, and the remaining parameters are constants: a-1.3011877, b-0.025840191, c-0.080242636, d-0.10320229, e-0.13646699, f-0.028745620, g-0.025468404, h-0.0031978977, k-0.00012992634, m-0.0013635334;
and for the user-defined curve, directly reading a curve target value from the configuration file.
In the foregoing step 6), performing curve calibration means that, in the feature data obtained in the step 3), a point closest to a target value of the curve is searched, and the searched feature data is added to the display lookup table.
The aforementioned finding of the point closest to the target value of the curve includes:
in the gray scale display, judging the point with the minimum absolute value of the difference between the characteristic data and the target value; in a color display, a point at which the variance between feature data and a target value is minimum is determined.
The interpolation calculation of the step 3) and the curve calibration process of the step 6) are executed by a terminal computer, and after the execution is finished, the result is downloaded to a storage mechanism of the portable diagnosis display.
The invention achieves the following beneficial effects:
the method of the invention is real-time calibration, can improve the consistency of the portable diagnosis display, enables the portable diagnosis display to better display the focus under the condition of environmental change, improves the diagnosis rate of doctors, reduces the error-free rate of difficult and complicated diseases, thereby improving the diagnosis efficiency of doctors and finally relieving the pain of patients to the maximum extent.
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FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Fig. 1 shows a real-time calibration method for a portable diagnostic display according to the present invention, and as shown in fig. 1, the method of the present invention comprises the following steps:
1) when the correction is started, the running program of the method is integrated on the chip of the portable diagnosis display and automatically started up along with the startup of the portable diagnosis display.
2) Feature acquisitions are made for the portable diagnostic display, the acquired features including color tristimulus values (X, Y, Z) and color coordinate values (x, y). The collection tool utilizes but is not limited to a color analyzer, and the number of the collected data is divided into two types: the portable diagnosis display can collect brightness values (Y) corresponding to 256 gray scales, and the portable color diagnosis display can collect three stimulation values (X, Y, Z) corresponding to 256 red (R), green (G) and blue (B). The characteristic data can be acquired only once or in real time, and is recommended to be acquired and stored regularly.
After the acquisition is finished, performing interpolation calculation on the acquired characteristic data according to the bit width of the portable diagnosis display, interpolating to the number corresponding to the bit width, downloading all the characteristic data, and storing the characteristic data in a storage mechanism of the portable diagnosis display.
The interpolation process can be executed by a terminal computer, the terminal computer acquires the characteristic data acquired by the color analyzer, calculates all required characteristic data according to the bit depth of the portable diagnosis display, and then downloads the characteristic data to a storage mechanism of the portable diagnosis display, so that a more reliable data source is provided for real-time correction.
3) And judging whether the ambient light changes or not, judging whether the screen brightness of the portable diagnosis display changes or not, detecting whether the ambient light changes or not in real time through an ambient light sensor, and detecting whether the screen brightness of the portable diagnosis display changes or not in real time through a front sensor.
4) And when the ambient light changes or the screen brightness of the portable diagnosis display changes, reading curve information adopted by the current portable diagnosis display.
5) And (3) carrying out curve calibration, specifically: from the read curve information, a curve target value is calculated, and then, in the stored feature data, a point closest to the curve target value is searched for, and the acquired feature data is added to a display look-up table (LUT table).
In this step, the target value of the curve is calculated for the standard curve by adopting the following standard calculation formula:
L＝10jnd
where L is the luminance, j is the jnd (just noticeable difference) value, and the remaining parameters are constants: a is-1.3011877 and b is
-0.025840191，c＝0.080242636，d＝-0.10320229，e＝0.13646699，f＝0.028745620，g＝-0.025468404，h＝-0.0031978977，k＝0.00012992634，m＝0.0013635334。
And for the user-defined curve, the curve target value is directly read from a configuration file, and the configuration file can be a text file, an EXCEL file, an XML file and other file forms which can be used as a storage mechanism. The curve calibration process is also performed by the terminal computer.
The method for searching the point closest to the target value of the curve comprises the following steps: in the gray scale display, judging the point with the minimum absolute value of the difference between the characteristic data and the target value; in a color display, a point at which the variance between feature data and a target value is minimum is determined.
The display look-up table (LUT table) is a one-to-one data table that shows the correspondence between the RGB values input by the display data source and the RGB values output by the display data source, and the data of this table is typically stored in registers of the display.
6) And issuing the acquired display lookup table (LUT table) to a storage mechanism of the portable diagnosis display.
7) The portable diagnostic display displays the image according to the issued display look-up table (LUT table).
8) And (4) finishing correction, namely finishing the real-time correction, wherein the method is also operated at the rear end of the portable diagnosis display, monitors the ambient light change or the display screen brightness change in real time, and carries out real-time correction after the corresponding brightness change at any time, namely, executing the steps 5) -7).
The invention supports the switching of multiple curves of the portable diagnosis display, ensures that the portable diagnosis display meets the diagnosis requirement of medical images, and ensures that the color is presented to better meet the requirement of human eyes.
It is further noted that the method of the present invention may be carried out using a carrier for carrying out the method, including but not limited to using a terminal computer, using but not limited to a color analyzer for measuring characteristic data, and monitoring ambient light level and portable diagnostic display screen brightness changes by but not limited to an ambient light sensor and a front sensor.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A method for real-time calibration of a portable diagnostic display, comprising the steps of:
1) automatically starting correction when the portable diagnosis display is started;
2) collecting characteristic data of the portable diagnosis display; the characteristic data is acquired as follows: acquiring brightness values Y corresponding to 256 gray scales on a gray scale portable diagnosis display, and acquiring three stimulus values X, Y, Z corresponding to 256-level red R, green G and blue B on a color portable diagnosis display;
3) obtaining all characteristic data through interpolation calculation;
4) judging whether the ambient light changes or not, and judging whether the screen brightness of the portable diagnosis display changes or not;
5) when the ambient light changes or the screen brightness of the portable diagnosis display changes, reading curve information adopted by the current portable diagnosis display;
6) calibrating the curve according to the curve target value, and storing the curve into a display lookup table;
the curve calibration according to the curve target value means that a point closest to the curve target value is searched in the characteristic data obtained in the step 3), and the searched characteristic data is added into a display lookup table;
the searching for the point closest to the target value of the curve comprises:
in the gray scale display, judging the point with the minimum absolute value of the difference between the characteristic data and the curve target value; in the color display, judging the point with the minimum variance between the characteristic data and the curve target value;
the target values of the curves are:
the target value of the curve is calculated for the standard curve by using the following standard calculation formula:
L＝10jnd
where L is the luminance, jnd is the minimum perceivable difference, j is the value jnd, and the remaining parameters are constants: a-1.3011877, b-0.025840191, c-0.080242636, d-0.10320229, e-0.13646699, f-0.028745620, g-0.025468404, h-0.0031978977, k-0.00012992634, m-0.0013635334;
for the user-defined curve, directly reading a curve target value from the configuration file;
7) the acquired display lookup table is sent to a storage mechanism of the portable diagnosis display;
8) the portable diagnosis display displays the image according to the transmitted display lookup table;
9) returning to the step 4) to continue real-time correction.
2. The method of claim 1, wherein in step 2), the characteristic data acquisition tool is a color analyzer.
3. The method for real-time calibration of a portable diagnostic display according to claim 1, wherein in the step 3), the collected feature data is interpolated according to the bit depth of the portable diagnostic display, and the number of the feature data is interpolated according to the bit depth.
4. The method as claimed in claim 1, wherein in the step 4), the ambient light sensor detects whether there is a change in ambient light, and the front sensor detects whether there is a change in screen brightness of the portable diagnostic display.
5. The method as claimed in claim 1, wherein the interpolation calculation of step 3) and the curve calibration of step 6) are performed by a terminal computer, and after the interpolation calculation and the curve calibration are completed, the results are downloaded to a storage mechanism of the portable diagnostic display.
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