CN115482791B - Imaging method, imaging device, electronic equipment and storage medium - Google Patents
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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
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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Abstract
The embodiment of the disclosure provides an imaging method, an imaging device, electronic equipment and a storage medium. The imaging method comprises the following steps: controlling the display panels to image sequentially one by one based on driving parameters in a driving parameter set of the display panels, and obtaining a first imaging diagram corresponding to each driving parameter in the driving parameter set; the driving parameter set comprises a plurality of driving parameters and a one-to-one mapping relation between each pixel area in the display panel and each driving parameter in the driving parameter set; based on the pixel areas mapped by the driving parameters, respectively capturing the corresponding first imaging images to obtain second imaging images of the pixel areas; and performing image stitching based on the second imaging images of the pixel areas to obtain the target imaging image of the display panel. According to the embodiment of the disclosure, the quality of the image displayed by the panel can be improved.
Description
Technical Field
The present disclosure relates to the field of image processing technologies, and in particular, to an imaging method, an imaging device, an electronic device, and a storage medium.
Background
In an imaging display system, each pixel in a display panel is imaged by a corresponding pixel TFT (Thin Film Transistor ), so there are tens of thousands of pixel TFTs imaged in the display panel. The pixel TFTs are controlled by the same driving circuit or signal acquisition and conversion circuit, etc., which means that the configuration parameters or driving parameters corresponding to all pixels of the same display panel are the same. However, since the manufacturing process of the pixel TFT is unstable, there is also a certain variation in TFT between each lot, and thus, characteristics of each pixel TFT are not uniform. For example, the threshold voltage Vth of each pixel TFT is not uniform, transconductance of TFT devices in a driving circuit driving the pixel TFT is not uniform, and the like. Furthermore, during imaging, the characteristics of each pixel TFT in the display panel are inconsistent, and the corresponding driving parameters are consistent, so that in an image obtained through imaging, the imaging quality of some pixel areas is better, the imaging quality of some pixel areas is poorer, and the images are variegated. Thus, existing imaging schemes affect imaging quality to some extent.
Disclosure of Invention
Embodiments of the present disclosure provide an imaging method, an imaging device, an electronic apparatus, and a storage medium, so as to solve or alleviate one or more technical problems in the prior art.
As a first aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide an imaging method including:
controlling the display panels to image sequentially one by one based on driving parameters in a driving parameter set of the display panels, and obtaining a first imaging diagram corresponding to each driving parameter in the driving parameter set; the driving parameter set comprises a plurality of driving parameters and a one-to-one mapping relation between each pixel area in the display panel and each driving parameter in the driving parameter set;
based on the pixel areas mapped by the driving parameters, respectively capturing the corresponding first imaging images to obtain second imaging images of the pixel areas;
and performing image stitching based on the second imaging images of the pixel areas to obtain the target imaging image of the display panel.
As a second aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide an image forming apparatus including:
the first imaging module is used for controlling the display panels to image sequentially one by one based on the driving parameters in the driving parameter set of the display panels, and obtaining a first imaging diagram corresponding to each driving parameter in the driving parameter set; the driving parameter set comprises a plurality of driving parameters and a one-to-one mapping relation between each pixel area in the display panel and each driving parameter in the driving parameter set;
The image capturing module is used for capturing images of the first imaging images respectively corresponding to the pixel areas based on the pixel areas mapped by the driving parameters respectively to obtain second imaging images of the pixel areas;
and the image stitching module is used for stitching the second imaging images of the pixel areas to obtain the target imaging image of the display panel.
As a third aspect of the embodiments of the present disclosure, the embodiments of the present disclosure provide an electronic device, including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the imaging methods provided by embodiments of the present disclosure.
As a fourth aspect of the disclosed embodiments, the disclosed embodiments provide a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the imaging method provided by the disclosed embodiments.
As a fourth aspect of the disclosed embodiments, the disclosed embodiments provide a computer program product comprising a computer program which, when executed by a processor, implements the imaging method provided by the disclosed embodiments.
According to the technical scheme provided by the embodiment of the disclosure, the driving parameter set of the display panel is obtained, the parameter set comprises mapping relations between each pixel region in the display panel and each driving parameter in the parameter set, and the mapping relations represent image quality of the pixel region in an image formed by the display panel driven by the driving parameters, which is superior to that of other regions. During imaging, controlling the display panel to sequentially image one by one based on driving parameters in a driving parameter set, and obtaining a first imaging diagram corresponding to each driving parameter in the driving parameter set; and based on the pixel areas mapped by the driving parameters, respectively capturing the corresponding first imaging images to obtain second imaging images of the pixel areas, and therefore, image stitching is carried out based on the second imaging images of the pixel areas to serve as a target imaging image of the display panel, so that the condition that quality of each pixel in an image is nonuniform due to characteristic inconsistency among the pixel TFTs in the display panel is eliminated, and quality of the image displayed by the display panel is improved.
The foregoing summary is for the purpose of the specification only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present disclosure will become apparent by reference to the drawings and the following detailed description.
Drawings
In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not to be considered limiting of its scope.
FIG. 1 is a block diagram of an ultrasound probe imaging system according to an embodiment of the present disclosure;
FIG. 2 is a circuit diagram of a pixel circuit of an embodiment of the present disclosure;
FIG. 3 is a circuit diagram of a signal acquisition and conversion circuit according to an embodiment of the present disclosure;
FIG. 4 is a dark diagram of an embodiment of the present disclosure;
FIG. 5 is a dark diagram of another embodiment of the present disclosure;
FIG. 6 is a signal diagram of an output signal of a pixel circuit according to an embodiment of the present disclosure after passing through an I-V conversion circuit;
FIG. 7 is a flow chart of an imaging method of an embodiment of the present disclosure;
FIG. 8 is a waveform diagram of an output signal of a pixel circuit according to an embodiment of the present disclosure after being processed by a signal acquisition and conversion circuit;
FIG. 9 is a parameter matrix corresponding to each pixel region of a display panel according to an embodiment of the disclosure;
FIG. 10 is a parameter matrix corresponding to each image area of a display panel according to another embodiment of the present disclosure;
FIG. 11 is a flow diagram of a merge matrix according to an embodiment of the disclosure;
FIG. 12 is a flow chart of image value stitching and subtraction in accordance with an embodiment of the present disclosure;
FIG. 13 is a schematic diagram of image value normalization for each pixel region of a display panel according to an embodiment of the present disclosure;
FIG. 14 is a schematic diagram of image stitching of an embodiment of the present disclosure;
fig. 15 is a block diagram of the structure of an image forming apparatus of an embodiment of the present disclosure;
fig. 16 is a block diagram of an electronic device of an embodiment of the present disclosure.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present disclosure. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
Fig. 1 is a block diagram of an ultrasound probe imaging system according to an embodiment of the present disclosure.
The ultrasonic detection imaging system comprises a transmitting driving circuit, a transmitting transducer, a piezoelectric film sensor (PVDF), an acquisition driving circuit, a gating amplifying circuit, a data acquisition circuit, an FPGA (Field Programmable Gate Array, programmable array logic) and an imaging unit.
In ultrasound imaging, a transmitting transducer transmits ultrasound waves, which are reflected after striking a target object, and PVDF receives echo signals. At the position ofBefore ultrasonic imaging, ultrasonic signals are not emitted, PVDF performs signal acquisition at RGD time (echo peak time), and the received signals are recorded as Dark values. The image based on the Dark values is called a Dark map. In ultrasound imaging, an ultrasound signal is emitted, PVDF performs signal acquisition at RGD time (echo peak time), and the received signal is recorded as a Light value. The image based on the Light value is called a Light map. Subtracting the Light value from the Dark value to obtain a signal DeltaV with the value of echo signal out 。
Fig. 2 is a block diagram of a pixel circuit in a display panel according to an embodiment of the present disclosure.
As shown in fig. 2, T1 to T4 are TFTs, and PVDF receives echo signals. The Vbias signal provides a bias voltage for T3 conduction; the Vrst signal performs reset discharge after finishing reading one frame of data, and has the functions of controlling the conduction of the Vbias signal and collecting the echo signal; the Vclose signal provides a loop for PVDF induced voltage, and can latch C1 voltage after being turned off; c1 is parasitic capacitance for storing echo signal induced voltage; vdd provides a dc voltage for T3; the Gate signal is a row scan strobe signal.
Fig. 3 is a block diagram of a signal acquisition and conversion circuit in a display panel according to an embodiment of the present disclosure.
As shown in fig. 3, the first stage amplifying circuit is an I-V conversion circuit, which converts the current output from the pixel circuit into a voltage. The second-stage amplifying circuit is an in-phase proportional amplifying circuit, and the gain is 1. The third stage is a 4-order low pass filter. The fourth stage is VGA adjustable gain amplifying circuit, gain is controlled by VG voltage. The final stage is an ADC acquisition circuit, and the amplified voltage signals are acquired and transmitted to an upper computer software FPGA. Wherein Vref1 and Vref2 are bias voltages, and the bias voltage values can be adjusted according to the output current, so that the amplifier works in the amplifying region. Vref1, vref2, VG are all voltage levels controlled by the DAC.
The functions of each stage of circuit can be subdivided into:
(1) And the I-V conversion circuit is used for performing I-V conversion of current-voltage on the current signal output by the pixel circuit and converting the current signal into a voltage signal.
(2) And the in-phase proportional amplifying circuit increases driving capability and performs impedance matching with the rear end.
(3) The cut-off frequency of the 4-order low-pass filter is 1MHz, and high-frequency noise is filtered.
(4) The VGA variable gain amplifier can adjust the amplification factor through a program. The DAC is an 18-bit high-precision voltage source and provides accurate reference voltages for the first and second-stage amplifying circuits and the AD 8336.
(5) And the analog-to-digital conversion circuit converts the analog voltage signal into a digital signal and transmits the digital signal to the FPGA at the rear end for digital signal processing.
(6) The bias voltages Vref1, vref2 function: and respectively adjusting the static working points of the front two-stage amplifying circuits.
(7) Action of voltage VG: and adjusting the amplification factor of the VGA variable gain amplifier.
(8) The voltages of Vref1, vref2 and VG are respectively provided by DAC chips (AD 5781), and the voltage range is-5V to +5V; the output voltage of the DAC chip can be controlled by FPGA program.
Fig. 4 and 5 are Dark diagrams of ultrasound imaging. As can be seen from fig. 4 and 5, the image quality of the Dark chart is poor due to the non-uniformity of the TFT characteristics of each pixel in the display panel.
FIG. 6 is a graph of the amplitude of signals output by the oscilloscope after signals of different rows in a certain column are measured by the I-V conversion circuit. As can be seen from fig. 6, the output signal is saturated positively and negatively due to the non-uniformity of the pixel TFT characteristics. If the bias voltage is increased, the first few row signals change from negative saturation to normal amplification, but the middle row signal is in positive saturation and the larger signals on both sides will continue to remain or enter positive saturation. Similarly, if the bias voltage is reduced, the first and last rows and their adjacent regions will remain or enter a negative saturation state. This is because the modification of the driving parameters is global and cannot be performed for a signal of a certain column.
There are two approaches to solve the above problem, one is to change the global configuration into a single-column configuration by modifying the hardware, i.e. each column is configured separately by adding a parameter configuration circuit, wherein each column includes 3 DAC chips and peripheral driver chips, but this will greatly increase the hardware cost in the context of shortage of global chip supply and price rise. Secondly, by modifying the time sequence and the algorithm, the pixel non-uniformity phenomenon is improved at the expense of a certain frame rate on the premise of not increasing the hardware cost.
Accordingly, the present disclosure provides an imaging method capable of solving the problem of deterioration of image quality caused by non-uniformity of pixel TFTs.
Fig. 7 is a flowchart of an imaging method provided by an embodiment of the present disclosure. As shown in fig. 7, the imaging method may include the steps of:
s110, controlling the display panel to image sequentially one by one based on the driving parameters in the driving parameter set of the display panel, and obtaining a first imaging diagram corresponding to each driving parameter in the driving parameter set; the driving parameter set comprises a plurality of driving parameters and a one-to-one mapping relation between each pixel area in the display panel and each driving parameter in the driving parameter set;
s120, based on pixel areas mapped by the driving parameters, respectively capturing the corresponding first imaging images to obtain second imaging images of the pixel areas;
And S130, performing image stitching based on the second imaging images of the pixel areas to obtain a target imaging image of the display panel.
In this example, by pre-configuring the driving parameter set, when in use, the display panel is controlled to image sequentially according to the driving parameters in the driving parameter set one by one, so as to obtain a first imaging diagram corresponding to each driving parameter in the driving parameter set. Because each driving parameter in the driving parameter set is mapped with each pixel area of the display panel one by one, based on the pixel areas mapped by each driving parameter, the corresponding first imaging images are respectively captured to obtain second imaging images of each pixel area, and the second imaging images are subjected to image stitching to obtain the target imaging images of the display panel. Because each mapping relation of the driving parameter set represents that the image quality of a pixel area in the mapping relation is better than that of other areas in the image obtained by imaging the display panel according to the driving parameters in the mapping relation, the target imaging diagram displayed by the display panel can eliminate the phenomenon of uneven images caused by inconsistent TFT characteristics of all pixels in the display panel, and the quality of the image displayed by the panel is improved.
Illustratively, each mapping in the set of driving parameters characterizes an image of the display panel imaged according to the driving parameters in the mapping, and the image quality of the pixel regions located in the mapping is better than the image quality of other regions.
Illustratively, the driving parameters may include bias voltages, gains, etc. of each stage of amplifying circuits in the driving circuit.
Illustratively, the display panel includes a plurality of pixel regions, each of which may include one pixel or a plurality of pixels. There is no intersection pixel point among the pixel areas, and the union of the pixel areas is the whole display area of the display panel.
The set of driving parameters may be characterized in the form of a matrix comprising a plurality of driving parameters, each driving parameter having a position in the matrix for characterizing a pixel area in the display panel to which the driving parameter is mapped, for example.
Illustratively, the imaging methods of the present disclosure may be applied to ultrasound imaging or general image imaging scenarios.
For example, for the second imaging map, the pixel region thereof, i.e., the screenshot region, is truncated, and may be determined as the mosaic region thereof.
Illustratively, in the step S130, the second imaging images are tiled based on the tile areas of the respective second imaging images, so as to obtain the target imaging image of the display panel. The target imaging map is displayed in a display panel.
In some embodiments, the set of drive parameters may be preconfigured and stored at a specified location. In use, a set of drive parameters for the display panel is extracted from the specified location. For example, the driving parameter set is extracted according to the identification of the display panel or the like. Different display panels have different sets of driving parameters.
In some embodiments, the configuration parameter set may also be generated directly at the time of use, and then the imaging method of the present disclosure is performed based on the configuration parameter set.
Illustratively, the above method may further comprise:
determining a first parameter set based on a first value range of the driving parameter;
controlling the display panel to sequentially image one by one based on the candidate parameters in the first parameter set to obtain a third imaging diagram corresponding to each candidate parameter in the first parameter set;
determining an image area with optimal imaging quality in a third imaging image as a pixel area mapped by the candidate parameters aiming at the third imaging image corresponding to each candidate parameter to obtain a second parameter set; the second parameter set comprises a candidate parameter and a mapping relation between the candidate parameter and the pixel area;
based on the second parameter set, a driving parameter set is determined.
In this example, the driving parameter set is obtained by configuring the preferred driving parameters corresponding to each pixel region of the display panel in advance, so that the image generated based on the driving parameter set can eliminate adverse effects caused by the characteristic of the pixel TFT and improve imaging quality.
For example, each driving parameter may comprise one or more parameters, which in case they comprise a plurality of parameters may be regarded as one driving parameter combination. For example, a drive parameter (Vref 1, vref2, VG), wherein Vref1 characterizes the bias voltage of the primary amplifying circuit, vref2 characterizes the bias voltage of the secondary amplifying circuit, VG characterizes the gain of the tertiary amplifying circuit.
The range or unit of values of each of the sub-parameters in the drive parameter may be different or may be the same, for example.
In the step of determining the driving parameter set based on the second parameter set, driving parameters corresponding to the respective pixel regions may be extracted from the second parameter set based on the respective pixel regions of the display surface structure, to obtain the driving parameter set. If the driving parameter corresponding to the pixel region cannot be found in the second parameter set, the driving parameter corresponding to the adjacent pixel region can be used as the driving parameter of the pixel region.
Or, returning to the previous step to readjust the first parameter set to obtain a new second parameter set, so as to extract the driving parameter corresponding to the pixel region in the new second parameter set. When readjusting the first parameter set, a third value range may be determined based on the values of the driving parameters of the adjacent pixel areas, and the second parameter set may be determined based on the third value range.
In some embodiments, to improve the parameter accuracy of the driving parameter set, after obtaining the second parameter set, a value range of each candidate parameter in the second parameter set may be determined, and based on the value range, the parameters may be selected or combined to obtain the third parameter set. Imaging and screenshot are carried out again based on the third parameter set, a fourth parameter set is obtained, and the second parameter set is updated by the fourth parameter set.
Illustratively, the above method may further comprise:
determining a third parameter set based on a second value range of each candidate parameter in the second parameter set;
aiming at candidate parameters in the third parameter set, controlling the display panel to image sequentially one by one candidate parameter to obtain a fourth imaging diagram corresponding to each candidate parameter in the third parameter set;
determining an image area with optimal imaging quality in a fourth imaging image as a pixel area mapped by the candidate parameters aiming at the fourth imaging image corresponding to each candidate parameter to obtain a fourth parameter set; the fourth parameter set comprises candidate parameters and a corresponding relation between the candidate parameters and the pixel area;
based on the fourth parameter set, the second parameter set is updated.
In this example, the accuracy of the configuration parameter set can be improved, further improving the imaging quality.
For example, the second parameter value may be updated continuously similar to the steps described above.
For example, the second range of values for the candidate parameter may be determined based on the value of each candidate parameter in the second set of parameters. For example, if most of the values of the candidate parameters in the second parameter set are around 2V, it may be determined that the second value range is between 1V and 3V, and then the values are randomly taken between 1V and 3V, so as to obtain the third parameter set.
Illustratively, the second range of values is within the first range of values.
For example, if the first range of values of the parameter Vref1 in the configuration parameters is [ -5V,5V ], the second range of values may be [0,3V ].
Illustratively, in the step of updating the second parameter set based on the fourth parameter set, it may include: and merging the fourth parameter set with the second parameter set to obtain the second parameter set. If the pixel region in the fourth parameter set is the same as the pixel region in the second parameter set, the driving parameter mapped by the pixel region in the second parameter set is updated with the driving parameter mapped by the pixel region in the fourth parameter set. If the pixel area of the fourth parameter set does not appear in the third parameter set, adding the driving parameter mapped by the pixel area in the second parameter set, and recording the mapping relation between the driving parameter and the pixel area.
In some embodiments, since the driving parameters include image magnification, the second image obtained in step S120 is magnified based on different magnification, and the image sizes are not uniform. Thus, the second imaging image needs to be scaled to the same magnification of the enlarged image.
Illustratively, the driving parameter includes an image magnification, and the method may further include:
determining a normalized image magnification of the second imaging modality based on the standard magnification and the image magnification of the second imaging modality;
the second imaging map is scaled based on the normalized image magnification of the second imaging map.
In this example, the second imaging map is normalized so that images cannot be stitched when stitched due to inconsistent image sizes.
Illustratively, the ratio of the image magnification of the second imaging modality to the standard magnification is determined as the normalized image magnification of the second imaging modality.
Illustratively, the image magnification of image a is 2, the magnification of image B is 3, the standard magnification is 10, the normalized image magnification of image a is 0.1, and the normalized image magnification of image B is 0.3.
In practical application, the imaging signal of the image A can be multiplied by 0.1, the imaging signal of the image B can be multiplied by 0.3, then the images are respectively imaged, and then the two images are spliced together.
In some embodiments, the above method may be applied in ultrasound imaging.
Illustratively, acquiring a target imaging diagram obtained by imaging the display panel for the first signal; the first signal is a signal received before ultrasonic imaging is carried out on the display panel;
acquiring a target imaging diagram obtained by imaging the second signal by the display panel; the second signal is a signal received when the display panel performs ultrasonic imaging;
and subtracting the target imaging image corresponding to the second signal from the target imaging image corresponding to the first signal to obtain an ultrasonic imaging image of ultrasonic imaging.
In this example, in the scene of ultrasound imaging, the problem of deterioration of image quality due to non-uniformity of pixel TFT characteristics can be eliminated.
In practical application, the final imaging signal of the target imaging image corresponding to the second signal and the final imaging signal of the target imaging image corresponding to the first signal can be subtracted to obtain the target ultrasonic imaging signal, and the display panel displays images according to the target ultrasonic imaging signal.
An application example of the present disclosure will be described below by taking ultrasound imaging as an example, specifically as follows:
1. after the system is powered on, the maximum peak position of the ultrasonic echo, namely the RGD time point, is found through signal scanning.
2. The determination process of the optimal parameter set comprises the following steps:
for a designated pixel area in the display panel, the image area can comprise one or more pixel points, and three parameters of an acquisition and conversion circuit in the ultrasonic control and measurement imaging system, namely Vref1, vref2 and VG, are adjusted to enable output signals of the pixel area to be stabilized around zero, as shown in fig. 8. Thus, the analog amplifying circuit can adjust the static working point to work in the amplifying region. At this time, the corresponding (Vref 1, vref2, VG) parameter values are the optimal configuration parameters of the pixel region.
According to the method, the optimal configuration parameters of each pixel area of the display panel are determined, so that the optimal parameter set of the display panel is obtained. Or, the two or more pixels are combined into a matrix, wherein the matrix comprises a plurality of optimal configuration parameters, each optimal configuration parameter represents a pixel area corresponding to the optimal configuration parameter in a display area at a matrix position, and when the display panel is driven according to the optimal configuration parameters, the quality of an image in the pixel area corresponding to the optimal configuration parameter in the matrix position is better than that of images in other areas.
3. And (5) not emitting ultrasonic waves, and collecting signals to obtain a Dark graph. And carrying out signal scanning based on each (Vref 1, vref2, VG) parameter value in the optimal parameter set or matrix to obtain corresponding pixel output signal amplitude values, and storing. I.e. one (Vref 1, vref2, VG) parameter corresponds to a graph having N rows and N columns of pixel output voltage magnitudes. After scanning, a plurality of groups of (Vref 1, vref2, VG) parameters and corresponding images (dark images) are obtained.
4. And in the same way, ultrasonic waves are generated, and signal scanning is carried out based on each (Vref 1, vref2, VG) parameter value in the optimal parameter set or matrix, so that a Light diagram corresponding to each parameter value is obtained.
5. And loading images corresponding to the matrix positions of the parameters in the light and dark images corresponding to the parameters according to each parameter and the position of each parameter in the combined optimal parameter matrix, subtracting the dark image from the light image corresponding to each parameter aiming at the intercepted images to obtain a difference value delta V_out, and forming a delta V_out data image according to the matrix positions of the parameters.
6. Normalization. Since the VG functions to adjust the amplification factor, and the amplification factor of each parameter is different, the VG of each pixel interval of the DeltaV_out data graph is different, and the corresponding amplification factor is also different, so that the VG value needs to be normalized and unified to the DeltaV_out value calculated by amplifying by 1 time.
7. The final Δvout numerical image is used for display.
Fig. 9 and fig. 10 are schematic diagrams of pixel non-uniform regions and optimal configuration parameter combining matrices thereof.
The non-uniform pixel TFTs in each display panel are quite different, and the following figures exemplify 2 simple examples, one of which is a stripe-shaped non-uniform region, and the other of which is a non-regular, distributed state.
The left diagram shows an example of division of each pixel region of the display panel, and the right diagram shows a parameter matrix corresponding to the display panel. The same parameters that are adjacent to the regions can be combined and the corresponding pixel regions can be combined. As shown in fig. 10, which is a union-set of pixel regions and an optimal parameter matrix. Wherein the positions of the parameters in the matrix are mapped to the pixel areas corresponding to the parameters one by one.
In this example, the display panel has 200 rows by 200 columns of pixels in total, and the 40000 pixels are partitioned, the configuration parameters are the same or within a specified range, and the positions in the matrix are adjacent, so that the display panel is uniformly divided into one region.
Another application example of the present disclosure will be described below taking ultrasound imaging as an example, specifically as follows:
1. The transmitting transducer does not transmit ultrasonic waves, and a sensor (PVDF) in the display panel receives signals;
2. scanning to obtain RGD value, and detecting the position of ultrasonic echo, namely the time interval RGD=2μs between echo and emission;
3. after the system is powered on, the output current is detected. At this time, the output waveform may be in a normal state or a distorted state (due to non-uniformity among pixels in the display panel). The program automatic control adjusts (Vref 1, vref2, VG) three parameters, vref1 and Vref2 can each be varied from-5V to +5V, and Step can be 1V. The FPGA program controls the output voltages of DAC-1 and DAC-2, and the voltage ranges of the DAC-1 and the DAC-2 are-5V to +5V; and VG was controlled to vary from-0.6V to +0.6V, step to 0.1V. The FPGA program controls the DAC-3 output voltage, and the AD8336 input voltage ranges from-0.6V to +0.6V, so that all amplification factors of the VGA can be covered, namely-14 dB to +46dB. Sequentially determining the numerical values of the three parameter arrangements, and then controlling the display panel to start imaging sequentially according to each parameter in the group to obtain an image value corresponding to each group of parameters, namely obtaining a plurality of dark diagrams. And (3) injection: each voltage scanning range is the range of positive and negative power supply power sources of the circuit.
4. Judgment standard: in the dark diagram, as in the transverse signal line in the middle area in fig. 8, the voltage variable range is maximized after receiving the echo signal, and the parameter corresponding to the dark diagram is considered to be the optimal configuration parameter of the pixel corresponding to the signal. Based on the standard, analyzing each dark graph to obtain optimal configuration parameters corresponding to a plurality of different pixels.
5. And (3) fine scanning, wherein after a group of coarse scanning optimal parameters are obtained, the scanning range is narrowed left and right according to the parameters, and fine scanning is continued. For example, (Vref 1, vref2, VG) = (1, -1, -0.1) is the optimal solution after coarse scanning, vref1 changes from 2V to 0V, step changes from 0V to-2V, step changes from 0.1V, VG changes from 0V to-0.2V, step changes from 0.01V, the values after the three parameters are arranged and combined are sequentially sent, the image values corresponding to each group of parameters are stored, and a plurality of dark diagrams are obtained.
6. And (3) according to the method in the step (4), obtaining the optimal solution corresponding to each pixel. The optimal solution and pixel information (such as position, batch, number, etc.) are stored in a database, and the corresponding configuration parameters are directly extracted from the database according to the numbers of the pixels when the optimal solution and the pixel information are used later.
7. And in the same way, the ultrasonic wave is beaten, the echo signal is received, the steps are repeated, and the optimal solution of the parameters corresponding to each pixel can be determined based on the obtained lihgt graphs corresponding to each parameter.
8. Combining the pixels with output voltages around zero and corresponding configuration parameters into a matrix;
fig. 11 is a configuration parameter matrix diagram. Where row represents a row, column represents a column, and page represents a page (image). And combining the 4 parameter matrixes into one according to the judging standard.
9. In the use process of ultrasonic imaging, the display panel is driven to work according to the configuration parameter matrix, and the DeltaV_out data matrix is obtained according to the obtained light value and the dark value. Transmitting a set of configuration parameters and storing corresponding data; after receiving the multi-frame data, extracting corresponding light and dark values according to the parameter matrix synthesized in fig. 11, and subtracting to obtain a Δv_out data matrix. Meanwhile, fig. 12 may also reflect the correspondence between the configuration parameters and the Δv_out data matrix.
10. Normalization. In the image splicing process, a key step is also provided, and the magnification is normalized. VG determines the adjustable magnification, so that the magnification needs to be uniform to know each pixel DeltaV out Output capability of (c) is provided. And determining the ratio of the VG parameter to the standard multiple as a K parameter value, wherein K is a scaling value obtained after normalization.
Fig. 13 is a schematic diagram of image stitching and magnification normalization.
Fig. 14 is a graph showing the contrast effect before and after image stitching. And displaying by using the normalized data.
The right image in fig. 14 shows that the image splicing method introduced by the patent is used, the transition between the peak and the trough after splicing is more natural, the sense of segmentation of the image is effectively eliminated, and the image is clearer.
The method is not only suitable for medical ultrasonic imaging design, but also suitable for other applications of ultrasonic waves, such as relevant fields of ultrasonic fingerprint identification, ultrasonic space detection and the like.
Fig. 15 is a block diagram of the structure of an image forming apparatus of an embodiment of the present disclosure.
As shown in fig. 15, the image forming apparatus may include:
a first imaging module 151, configured to control, based on driving parameters in a driving parameter set of a display panel, the display panel to sequentially image one by one, so as to obtain a first imaging map corresponding to each driving parameter in the driving parameter set; the driving parameter set comprises a plurality of driving parameters and a one-to-one mapping relation between each pixel area in the display panel and each driving parameter in the driving parameter set;
The image capturing module 152 is configured to capture a screenshot of each corresponding first imaging image based on the pixel area mapped by each driving parameter, so as to obtain a second imaging image of each pixel area;
and the image stitching module 153 is configured to perform image stitching on the second imaging map of each pixel area, so as to obtain a target imaging map of the display panel.
Illustratively, the apparatus may further include:
the first parameter set determining module is used for determining a first parameter set based on a first value range of the driving parameter;
the second imaging module is used for controlling the display panel to sequentially image one by one based on the candidate parameters in the first parameter set to obtain a third imaging diagram corresponding to each candidate parameter in the first parameter set;
the second parameter set determining module is used for determining an image area with optimal imaging quality in a third imaging image corresponding to each candidate parameter as a pixel area mapped by the candidate parameter to obtain a second parameter set; the second parameter set comprises candidate parameters and a mapping relation between the candidate parameters and the pixel area;
and the driving parameter set determining module is used for determining the driving parameter set based on the second parameter set.
Illustratively, the apparatus may further include:
a third parameter set determining module, configured to determine a third parameter set based on a second value range of each candidate parameter in the second parameter set;
the third imaging module is used for controlling the display panel to sequentially image according to the candidate parameters in the third parameter set one by one to obtain a fourth imaging diagram corresponding to each candidate parameter in the third parameter set;
a third parameter set determining module, configured to determine, for a fourth imaging map corresponding to each candidate parameter, an image area with optimal imaging quality in the fourth imaging map as a pixel area mapped by the candidate parameter, to obtain a fourth parameter set; the fourth parameter set comprises candidate parameters and a corresponding relation between the candidate parameters and the pixel area;
and the parameter set updating module is used for updating the second parameter set based on the fourth parameter set.
Illustratively, the second range of values is within the first range of values.
Illustratively, the driving parameters include image magnification, and before the image stitching is performed on the second imaging map of each pixel region, the driving parameters further include:
The normalization multiple determining module is used for determining the normalization image magnification of the second imaging image based on the standard magnification and the image magnification of the second imaging image;
and the image scaling module is used for scaling the second imaging image based on the normalized image magnification of the second imaging image.
Illustratively, the apparatus may further include:
the first image acquisition module is used for acquiring a target imaging image obtained by imaging the display panel aiming at the first signal; the first signal is a signal received before ultrasonic imaging is carried out on the display panel;
the second image acquisition module is used for acquiring a target imaging diagram obtained by imaging the display panel aiming at a second signal; the second signal is a signal received when the display panel performs ultrasonic imaging;
and the ultrasonic imaging diagram determining module is used for subtracting the target imaging diagram corresponding to the second signal from the target imaging diagram corresponding to the first signal to obtain the ultrasonic imaging diagram of the ultrasonic imaging.
The functions of each unit, module or sub-module in each apparatus of the embodiments of the present disclosure may be referred to the corresponding descriptions in the above method embodiments, which are not repeated herein.
According to embodiments of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium and a computer program product.
According to an embodiment of the present disclosure, the present disclosure further provides a display panel including the electronic device of the embodiment of the present disclosure.
Fig. 16 shows a schematic block diagram of an example electronic device 800 that may be used to implement embodiments of the present disclosure. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the disclosure described and/or claimed herein.
As shown in fig. 16, the electronic device 800 includes a computing unit 801 that can perform various appropriate actions and processes according to a computer program stored in a Read Only Memory (ROM) 802 or a computer program loaded from a storage unit 808 into a Random Access Memory (RAM) 803. In the RAM 803, various programs and data required for the operation of the electronic device 800 can also be stored. The computing unit 801, the ROM 802, and the RAM 803 are connected to each other by a bus 804. An input output (I/O) interface 805 is also connected to the bus 804.
Various components in electronic device 800 are connected to I/O interface 805, including: an input unit 806 such as a keyboard, mouse, etc.; an output unit 807 such as various types of displays, speakers, and the like; a storage unit 808, such as a magnetic disk, optical disk, etc.; and a communication unit 809, such as a network card, modem, wireless communication transceiver, or the like. The communication unit 809 allows the electronic device 800 to exchange information/data with other devices through a computer network such as the internet and/or various telecommunication networks.
The computing unit 801 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of computing unit 801 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various computing units running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 801 performs the respective methods and processes described above, such as an imaging method. For example, in some embodiments, the imaging method may be implemented as a computer software program tangibly embodied on a machine-readable medium, such as the storage unit 808. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 800 via the ROM 802 and/or the communication unit 809. When a computer program is loaded into RAM 803 and executed by computing unit 801, one or more steps of the imaging method described above may be performed. Alternatively, in other embodiments, the computing unit 801 may be configured to perform the imaging method by any other suitable means (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), complex Programmable Logic Devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a general purpose computer, special purpose computer or other programmable atmosphere lamp fixture such that the program code, when executed by the processor or controller, causes the functions/operations specified in the flowchart and/or block diagram to be carried out. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and pointing device (e.g., a mouse or trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), and the internet.
The computer system may include a client and a server. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server may be a cloud server, a server of a distributed system, or a server incorporating a blockchain.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps recited in the present disclosure may be performed in parallel, sequentially, or in a different order, provided that the desired results of the disclosed aspects are achieved, and are not limited herein.
The above detailed description should not be taken as limiting the scope of the present disclosure. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure are intended to be included within the scope of the present disclosure.
Claims (15)
1. An imaging method, comprising:
controlling the display panels to image sequentially one by one based on driving parameters in a driving parameter set of the display panels, and obtaining a first imaging diagram corresponding to each driving parameter in the driving parameter set; the driving parameter set comprises a plurality of driving parameters and a one-to-one mapping relation between each pixel region in the display panel and each driving parameter in the driving parameter set, wherein the mapping relation is used for representing that in an image obtained by imaging the driving parameters in the mapping relation of the display panel, the image quality of the pixel region in the mapping relation is better than that of other regions;
Based on the pixel areas mapped by the driving parameters, respectively capturing the corresponding first imaging images to obtain second imaging images of the pixel areas;
and performing image stitching based on the second imaging images of the pixel areas to obtain the target imaging image of the display panel.
2. The method as recited in claim 1, further comprising:
determining a first parameter set based on a first value range of the driving parameter;
controlling the display panel to image sequentially one by one based on the candidate parameters in the first parameter set to obtain a third imaging diagram corresponding to each candidate parameter in the first parameter set;
determining an image area with optimal imaging quality in a third imaging image as a pixel area mapped by the candidate parameters aiming at the third imaging image corresponding to each candidate parameter to obtain a second parameter set; the second parameter set comprises candidate parameters and a mapping relation between the candidate parameters and the pixel area;
the driving parameter set is determined based on the second parameter set.
3. The method as recited in claim 2, further comprising:
determining a third parameter set based on a second value range of each candidate parameter in the second parameter set;
Aiming at candidate parameters in the third parameter set, controlling the display panel to image sequentially one by one candidate parameter to obtain a fourth imaging diagram corresponding to each candidate parameter in the third parameter set;
determining an image area with optimal imaging quality in a fourth imaging image as a pixel area mapped by the candidate parameters aiming at the fourth imaging image corresponding to each candidate parameter to obtain a fourth parameter set; the fourth parameter set comprises candidate parameters and a corresponding relation between the candidate parameters and the pixel area;
updating the second parameter set based on the fourth parameter set.
4. A method according to claim 3, wherein the second range of values is within the first range of values.
5. The method of claim 1, wherein the driving parameter comprises image magnification, the method further comprising:
determining a normalized image magnification of the second imaging modality based on a standard magnification and an image magnification of the second imaging modality;
scaling the second imaging map based on the normalized image magnification of the second imaging map.
6. The method according to any one of claims 1 to 5, further comprising:
acquiring a target imaging diagram obtained by imaging the display panel aiming at a first signal; the first signal is a signal received before ultrasonic imaging is carried out on the display panel;
acquiring a target imaging diagram obtained by imaging the display panel aiming at a second signal; the second signal is a signal received when the display panel performs ultrasonic imaging;
and subtracting the target imaging image corresponding to the second signal from the target imaging image corresponding to the first signal to obtain an ultrasonic imaging image of the ultrasonic imaging.
7. An image forming apparatus, comprising:
the first imaging module is used for controlling the display panels to image sequentially one by one based on the driving parameters in the driving parameter set of the display panels, and obtaining a first imaging diagram corresponding to each driving parameter in the driving parameter set; the driving parameter set comprises a plurality of driving parameters and a one-to-one mapping relation between each pixel region in the display panel and each driving parameter in the driving parameter set, wherein the mapping relation is used for representing that in an image obtained by imaging the driving parameters in the mapping relation of the display panel, the image quality of the pixel region in the mapping relation is better than that of other regions;
The image capturing module is used for capturing images of the first imaging images respectively corresponding to the pixel areas based on the pixel areas mapped by the driving parameters respectively to obtain second imaging images of the pixel areas;
and the image stitching module is used for stitching the second imaging images of the pixel areas to obtain the target imaging image of the display panel.
8. The apparatus as recited in claim 7, further comprising:
the first parameter set determining module is used for determining a first parameter set based on a first value range of the driving parameter;
the second imaging module is used for controlling the display panel to sequentially image one by one based on the candidate parameters in the first parameter set to obtain a third imaging diagram corresponding to each candidate parameter in the first parameter set;
the second parameter set determining module is used for determining an image area with optimal imaging quality in a third imaging image corresponding to each candidate parameter as a pixel area mapped by the candidate parameter to obtain a second parameter set; the second parameter set comprises candidate parameters and a mapping relation between the candidate parameters and the pixel area;
And the driving parameter set determining module is used for determining the driving parameter set based on the second parameter set.
9. The apparatus as recited in claim 8, further comprising:
a third parameter set determining module, configured to determine a third parameter set based on a second value range of each candidate parameter in the second parameter set;
the third imaging module is used for controlling the display panel to sequentially image according to the candidate parameters in the third parameter set one by one to obtain a fourth imaging diagram corresponding to each candidate parameter in the third parameter set;
a third parameter set determining module, configured to determine, for a fourth imaging map corresponding to each candidate parameter, an image area with optimal imaging quality in the fourth imaging map as a pixel area mapped by the candidate parameter, to obtain a fourth parameter set; the fourth parameter set comprises candidate parameters and a corresponding relation between the candidate parameters and the pixel area;
and the parameter set updating module is used for updating the second parameter set based on the fourth parameter set.
10. The apparatus of claim 9, wherein the second range of values is within the first range of values.
11. The apparatus of claim 7, wherein the drive parameters include image magnification, and further comprising, prior to image stitching the second image of each pixel region:
the normalization multiple determining module is used for determining the normalization image magnification of the second imaging image based on the standard magnification and the image magnification of the second imaging image;
and the image scaling module is used for scaling the second imaging image based on the normalized image magnification of the second imaging image.
12. The apparatus according to any one of claims 7 to 11, further comprising:
the first image acquisition module is used for acquiring a target imaging image obtained by imaging the display panel aiming at the first signal; the first signal is a signal received before ultrasonic imaging is carried out on the display panel;
the second image acquisition module is used for acquiring a target imaging diagram obtained by imaging the display panel aiming at a second signal; the second signal is a signal received when the display panel performs ultrasonic imaging;
and the ultrasonic imaging diagram determining module is used for subtracting the target imaging diagram corresponding to the second signal from the target imaging diagram corresponding to the first signal to obtain the ultrasonic imaging diagram of the ultrasonic imaging.
13. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-6.
14. A display panel comprising the electronic device of claim 13.
15. A non-transitory computer readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1-6.
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| US5617229A (en) * | 1993-08-27 | 1997-04-01 | Sharp Kabushiki Kaisha | Field sequential ferroelectric LCD having a single crystalline layer in which a plurality of circuit elements are formed |
| JPH10319909A (en) * | 1997-05-22 | 1998-12-04 | Casio Comput Co Ltd | Display device and driving method therefor |
| WO2014010868A1 (en) * | 2012-07-11 | 2014-01-16 | (주)실리콘화일 | Apparatus for reducing color non-uniformity in organic light-emitting diode display panel |
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