CN109360229B - Laser projection image processing method, device and equipment - Google Patents
Laser projection image processing method, device and equipment Download PDFInfo
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- CN109360229B CN109360229B CN201811288749.5A CN201811288749A CN109360229B CN 109360229 B CN109360229 B CN 109360229B CN 201811288749 A CN201811288749 A CN 201811288749A CN 109360229 B CN109360229 B CN 109360229B
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- G06T7/30—Determination of transform parameters for the alignment of images, i.e. image registration
Abstract
The embodiment of the invention provides a laser projection image processing method, a laser projection image processing device and laser projection image processing equipment, wherein the method comprises the following steps: determining a first pixel address according to the acquired row and column index number; acquiring a brightness control table; wherein the brightness control table comprises: pixel addresses and corresponding luminance correction values; and sequentially projecting and displaying each pixel according to the brightness correction value in the brightness control table according to the first pixel address to obtain a projected image. And sequentially adjusting the brightness value of each pixel point in the row-column index number according to the first starting pixel address and the first ending pixel address, so that a projected image with uniform brightness can be obtained, and the brightness adjustment of each pixel point in the image is simply and accurately realized.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a laser projection image processing method, device and equipment.
Background
At present, projection technologies are widely applied, and common projection modes include dlp (digital Light processing) projection, lcos (liquid Crystal on silicon) projection, lbs (laser beam scanning) projection, and the like. The LBS projection technology has the advantages of touch interaction, no need of focusing, small size and the like. On the premise of presenting clear projection, the LBS technology can realize infinite focusing, wide color gamut and bright display of static/dynamic image projection; based on the same resolution, the LBS technology has high contrast, low power consumption, light weight and excellent embedding performance. Importantly, the LBS technology can realize accurate positioning touch without increasing a depth-of-field camera module, and is beneficial to reducing cost.
In the prior art, the LBS projection technology controls laser projection through an MEMS (micro electro mechanical system), and since the operation angular velocity of the MEMS is not uniform in the periodic oscillation process under the control of a driving signal, the size of an image displayed by a pixel point obtained by projection is changed, and the larger the deformation amount of the pixel point is, the lower the brightness of the pixel point is, and the uneven brightness of the image obtained by projection is caused.
Based on this, a simple and effective scheme for processing the projected image so as to realize uniform brightness display of the projected image is needed.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a method, an apparatus, and a device for processing a laser projection image, and the present invention needs a simple and effective scheme for processing a projection image so as to achieve uniform brightness display of the projection image.
In a first aspect, an embodiment of the present invention provides a laser projection image processing method, including:
determining a first pixel address according to the acquired row and column index number;
acquiring a brightness control table; wherein the brightness control table comprises: pixel addresses and corresponding luminance correction values;
and sequentially projecting and displaying each pixel according to the brightness correction value in the brightness control table according to the first pixel address to obtain a projected image.
In a second aspect, an embodiment of the present invention provides a laser projection image processing apparatus, including:
the address determining module is used for determining a first pixel address according to the acquired row and column index number;
the acquisition module is used for acquiring a brightness control table; wherein the brightness control table comprises: pixel addresses and corresponding luminance correction values;
and the projection module is used for sequentially projecting and displaying each pixel according to the brightness correction value in the brightness control table according to the first pixel address to obtain a projection image.
In a third aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes: .
An embodiment of the present invention provides a computer storage medium for storing a computer program, where the computer program is used to enable a computer to implement the image processing method in the first aspect when executed.
In a fourth aspect, an embodiment of the present invention provides a laser projection image processing apparatus, including:
an image data module, configured to provide image data to be displayed, where the image data to be displayed at least includes: a pixel luminance value;
the brightness control table module comprises pixel addresses and corresponding brightness correction values;
and the image data superposition module is used for sequentially projecting and displaying each pixel according to the brightness correction value and the corresponding pixel brightness value in the brightness control table according to the first pixel address in the acquired row-column index number to obtain a projected image.
The laser projection image processing method provided by the embodiment of the invention acquires the first start pixel address and the first end pixel address of the laser projection image corresponding to each row index number, and further acquires a brightness control table, wherein the brightness control table comprises the pixel addresses and the corresponding brightness correction values. When laser projection is carried out, the brightness values of all pixel points to be projected are sequentially corrected according to the sequence of pixel addresses, and the corrected projection pixel brightness values are obtained. Further, laser projection is performed from the first start pixel address according to the corrected projection pixel luminance value, and a projection image is obtained. By the technical scheme, the brightness values of all the pixel points in the row-column index number are sequentially adjusted according to the first starting pixel address and the first ending pixel address, so that a projected image with uniform brightness can be obtained, and the brightness adjustment of all the pixel points in the image is simply and accurately realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a laser beam scanning projector (LBS) according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a projected image provided by an embodiment of the present invention;
FIG. 3 is a flowchart illustrating an image processing method according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a brightness control table according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a luminance distribution of a pixel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a laser projection image processing apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another laser projection image processing apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
In addition, the sequence of steps in each method embodiment described below is only an example and is not strictly limited.
The technical scheme of the invention can be applied to the technical fields of laser beam scanning projectors (LBS), Head Up Displays (HUD) and the like. For ease of understanding, the LBS is described below as an example.
As shown in fig. 1, the LBS mainly includes: and the image input interface is used for receiving image data output by a PC (personal computer), a set-top box and the like and processing the image data.
And a laser controller for controlling brightness of RGB laser, and simultaneously lighting and synthesizing pixel data of the image received from the image input interface into a pixel color by using the RGB laser.
RGB three-color laser, under the control of laser controller, three-color laser synthesizes image pixel point according to image information in proper order.
And a scanning control system for outputting a driving signal to control the MEMS (micro electro mechanical system) to rotate in the horizontal direction and the vertical direction at the same time.
MEMS (micro electro mechanical system), the control mirror swings around two axes of horizontal and vertical directions.
The projected image obtained by the projection equipment is shown in fig. 2, because the speed of the MEMS is changed from moment to moment in the swing process, it can be seen from the figure that the lengths of the pixel points in the columns with the column numbers P1-P7 are different, the lengths of the pixel points in P1 and P7 are shorter, and the P4 is longer, so that the luminance of the pixel points in P1 and P7 is higher, and the luminance of P4 is lower. The obtained laser projection image has uneven brightness. In order to solve the above problems, the technical solution of the present invention may be adopted to adjust the brightness of each pixel point in the image. The method comprises the following specific steps:
fig. 3 is a flowchart illustrating an image processing method according to an embodiment of the present invention, where the image processing method may be executed by a projection device. The method comprises the following steps:
step 301: and determining a first pixel address according to the acquired row and column index number.
In practical applications, laser projection is achieved by a laser. During projection, the laser scans in a preset scanning order, for example, from top to bottom and from left to right; specifically, when a certain row of pixels are displayed, the pixels are displayed one by one according to the sequence from left to right; and after the display of one pixel row is finished, displaying the pixel points in the next pixel row according to the sequence from top to bottom.
The row and column index number may be a row index number (e.g., Y rows) or a column index number (e.g., X columns). The first pixel address may be a pixel address including a row index number (e.g., Y) and a column index number (e.g., X), and may be represented by a horizontal and vertical coordinate (e.g., (X, Y)). It should be noted that each row-column index number has a corresponding first pixel address, for example, assuming that the row-column index number is a row index number, the corresponding pixel address may be a column index number, and the first pixel address may be a pixel address having the same column index number. Generally, the row-column index number is determined according to the resolution of the current image to be projected, for example, when the resolution of the image to be projected is X × Y, the corresponding row index number is 0 to Y-1.
Step 302: acquiring a brightness control table; wherein the brightness control table comprises: pixel addresses and corresponding brightness correction values.
Fig. 4 is a schematic diagram of a brightness control table provided by an embodiment of the present invention, in which pixel addresses and brightness correction values are in corresponding relationship with each other. The brightness correction value may be positive, negative or zero. The brightness correction value here is a value for adjusting the brightness value of the pixel obtained by the current projection so as to obtain a projection pixel having a desired brightness. It should be noted that the brightness correction value may be a brightness control table that is determined by testing the laser projection apparatus during the production commissioning of the laser projection apparatus, and thus, in practical applications, different laser projection apparatuses (e.g., LBS laser projectors) have different brightness control tables.
Step 303: and sequentially projecting and displaying each pixel according to the brightness correction value in the brightness control table according to the first pixel address to obtain a projected image.
The first pixel address referred to herein includes a first start pixel address and a first end pixel address. In practical applications, the MEMS swing range is larger than the effective display range, in other words, the start position of the MEMS swing range leads the first start pixel address, and the end position of the MEMS swing range lags the first end pixel address. In the MEMS swinging process, before reaching a first initial pixel address corresponding to the row-column index number, closing laser projection; turning off the laser projection after reaching the first end pixel address; and starting laser projection between the first starting pixel address and the first ending pixel address, and adjusting the brightness value of each pixel point. The sequential projection here can be understood as performing projection sequentially according to the sequence of the row and column index numbers (for example, the numbering sequence of the row index numbers) and the sequence of the pixel points in the row or column corresponding to each row and column index number (for example, the sequence from left to right); it should be noted that, in some practical applications, in the horizontal scanning process, the scanning is performed sequentially end to end according to the left-to-right sequence of the current line and the right-to-left sequence of the next line.
The sequential projection display of the pixels is a projection order of the pixels when the laser projects the laser light to perform projection display, and may be, for example, a projection display in order from top to bottom and from left to right. Since the display is performed in the order of the pixel addresses in the brightness control table, the pixel points in all rows and columns in the data table are displayed.
The scanning display process is a process of displaying one frame of image, and each frame of image is also updated in real time according to a certain period. Therefore, in practical applications, the frame image update period is greater than or equal to the row-column scanning period.
In one or more embodiments of the present invention, the determining, according to the obtained row and column index number, a corresponding first pixel address may specifically include: acquiring the pixel brightness value displayed by each pixel address in the row-column index number; and determining a first pixel address corresponding to the row-column index number according to a preset first brightness threshold and the pixel brightness value.
As can be seen from the foregoing description and fig. 2, when performing laser projection display, the brightness of each pixel in the same row is not uniform, and fig. 5 is a schematic diagram of the brightness distribution of the pixels according to the embodiment of the present invention. In fig. 5, the abscissa represents the relative position of each pixel point in the current scanning range, the ordinate represents the luminance value of the pixel before correction, the U-shaped point represents the luminance value of each pixel point and the corresponding relative position, and the U-shaped line represents the luminance mean value.
As can be seen from the figure, the brightness at the start position and the end position of each line is relatively high, the middle brightness is relatively low, and the brightness at the positions other than the start position and the end position is relatively uniform and easy to adjust. In the case of brightness adjustment, in order to simplify the adjustment operation, the projection is turned off at a clearly too bright position, in other words, so that the start position and the end position of the too bright are not displayed. The first luminance threshold value referred to herein may be a luminance value corresponding to an intersection between two vertical lines and a curve as in fig. 5; of course, in practical applications, the brightness values corresponding to the two intersection points may be the same or different.
In one or more embodiments of the present invention, the determining, according to a preset first brightness threshold and the pixel brightness value, a first pixel address corresponding to the row-column index number may specifically include: and determining a first start pixel address and a first end pixel address corresponding to the row-column index number according to the preset first brightness threshold and the obtained brightness value of each pixel.
For example, as shown in fig. 5, assuming that the first luminance threshold is E, the intersection point on the U-shaped luminance mean line is determined according to the first luminance threshold, and the abscissa of the two vertical lines is determined based on the intersection point. Further, the abscissa corresponding to the two vertical lines is the first pixel address (i.e., column index number), which is the first start pixel address and the first end pixel address, respectively. The first pixel addresses corresponding to the respective row index numbers may be the same.
In one or more embodiments of the present invention, after determining the first start pixel address and the first end pixel address corresponding to the row-column index number, the method may further include: and determining the number of effective pixels contained in the row or the column corresponding to the row-column index number and the corresponding pixel address according to the first starting pixel address and the first ending pixel address.
In practical applications, due to the difference of the actual projection ranges, if the same content (content with the same resolution) is to be displayed, the display period of each pixel point needs to be adjusted correspondingly. Therefore, after the first start pixel address and the first end pixel address are determined, the display period of each pixel point needs to be recalculated according to the pixel resolution (in other words, the number of pixel points included in each row or column) of the current image to be displayed.
After determining the number of effective pixels between the first start pixel address and the first end pixel address, it is further required to determine the pixel address corresponding to each pixel point based on the current display range. For example, assuming that the resolution of the image to be displayed is X × Y, X × Y pixel points are obtained by dividing in the current display range, and the positions corresponding to the pixel points are numbered as pixel addresses.
In one or more embodiments of the present invention, the obtaining the brightness control table may specifically include: determining a pixel brightness value corresponding to each pixel address according to the row-column index number; determining the brightness correction value according to a preset second brightness threshold and the pixel brightness value; and obtaining the brightness control table based on the pixel address and the corresponding brightness correction value.
After the first start pixel address and the first end pixel address are determined, the luminance mean value of each pixel point in the effective display range can be further determined, and the luminance mean value is used as a preset second luminance threshold value. Of course, in practical applications, the preset second brightness threshold may not be determined by the average value, and may be specified by the user according to requirements.
Assuming that the current pixel brightness value is A and the second brightness threshold value is B; then, the luminance correction value C — B-a may be determined. Further, based on the luminance correction value C and the pixel address, a luminance control table is obtained. In the table, there is a one-to-one correspondence between the luminance correction values and the pixel addresses.
In one or more embodiments of the present invention, the obtaining the brightness control table based on the pixel address and the corresponding brightness correction value may specifically include: sequentially determining the pixel address of each pixel according to the row-column index number and the number of the effective pixels; and obtaining the brightness control table based on the pixel address and the corresponding brightness correction value.
In practical applications, the pixel address may be represented by a column index number. Suppose that, in the pixel row with row-column index number X, the pixel address is the corresponding column index number Y. When numbering pixel addresses, the numbers of 0 to (Y) can be sequentially numbered according to the number n of effective pixelsn-1). In the luminance control table, the luminance correction value C is in a one-to-one correspondence with the column index number Y.
In one or more embodiments of the present invention, the sequentially projecting and displaying the pixels according to the brightness correction value in the brightness control table according to the first pixel address to obtain the projection image may specifically include: projecting a first pixel according to the first starting pixel address; adjusting the brightness value of each pixel according to the brightness correction value; and sequentially projecting and displaying each pixel according to the pixel address in the brightness control table to obtain a projected image.
As previously described, the scan order is assumed to be left to right, top to bottom. Assume that the first start pixel address is (X)0，Y0) The first pixel is projected starting at the address. In the projection process, the brightness value of each pixel point to be projected is adjusted, and in practical application, the brightness correction value can be positive, negative or zero. When the adjustment is performed, the current pixel brightness value and the brightness correction value may be summed to be an adjustment result (of course, in practical applications, the operation relationship between the pixel brightness value and the brightness correction value may be adjusted according to an actual scene, and the summation here is one of the embodiments). When pixel projection is performed, projection is performed sequentially in accordance with the order of pixel addresses.
In one or more embodiments of the present invention, the adjusting the luminance value of each pixel according to the luminance correction value may specifically include: acquiring the pixel brightness value and the brightness correction value; and superposing the pixel brightness value and the brightness correction value to obtain a projection pixel brightness value.
Assuming that the luminance value of the projection pixel is D, the luminance correction value is C and the luminance value of the pixel is a as described above, D is a + C. During actual projection, projection and display of pixel points are required according to the projection brightness values.
Based on the same idea, an embodiment of the present invention further provides a laser projection image processing apparatus, as shown in fig. 6, the apparatus including:
the address determining module 61 is configured to determine a first pixel address according to the obtained row and column index number;
an obtaining module 62, configured to obtain a brightness control table; wherein the brightness control table comprises: pixel addresses and corresponding luminance correction values;
and the projection module 63 is configured to sequentially project and display each pixel according to the brightness correction value in the brightness control table according to the first pixel address, so as to obtain a projection image.
Further, the address determining module 61 is configured to obtain a pixel brightness value displayed by each pixel address in the row-column index number;
and determining a first pixel address corresponding to the row-column index number according to a preset first brightness threshold and the pixel brightness value.
Further, the determining a first pixel address corresponding to the row-column index number according to a preset first brightness threshold and the pixel brightness value includes:
and determining a first start pixel address and a first end pixel address corresponding to the row-column index number according to the preset first brightness threshold and the obtained brightness value of each pixel.
Further, after determining the first start pixel address and the first end pixel address corresponding to the row-column index number, the method further includes:
and determining the number of effective pixels contained in the row or the column corresponding to the row-column index number and the corresponding pixel address according to the first starting pixel address and the first ending pixel address.
Further, the obtaining module 62 is configured to determine a pixel brightness value corresponding to each pixel address according to the row-column index number;
determining the brightness correction value according to a preset second brightness threshold and the pixel brightness value;
and obtaining the brightness control table based on the pixel address and the corresponding brightness correction value.
Further, the obtaining the brightness control table based on the pixel address and the corresponding brightness correction value includes:
sequentially determining the pixel address of each pixel according to the row-column index number and the number of the effective pixels;
and obtaining the brightness control table based on the pixel address and the corresponding brightness correction value.
Further, the sequentially projecting and displaying the pixels according to the brightness correction value in the brightness control table according to the first pixel address to obtain a projection image includes:
projecting a first pixel according to the first starting pixel address;
adjusting the brightness value of each pixel according to the brightness correction value;
and sequentially projecting and displaying each pixel according to the pixel address in the brightness control table to obtain a projected image.
Further, the adjusting the brightness value of each pixel according to the brightness correction value includes:
acquiring the pixel brightness value and the brightness correction value;
and superposing the pixel brightness value and the brightness correction value to obtain a projection pixel brightness value.
As described above, the first start pixel address and the first end pixel address of the laser projection image corresponding to each row-column index number are obtained, and further, the luminance control table is obtained, and the luminance control table includes the pixel addresses and the corresponding luminance correction values. When laser projection is carried out, the brightness values of all pixel points to be projected are sequentially corrected according to the sequence of pixel addresses, and the corrected projection pixel brightness values are obtained. Further, laser projection is performed from the first start pixel address according to the corrected projection pixel luminance value, and a projection image is obtained. By the technical scheme, the brightness values of all the pixel points in the row-column index number are sequentially adjusted according to the first starting pixel address and the first ending pixel address, so that a projected image with uniform brightness can be obtained, and the brightness adjustment of all the pixel points in the image is simply and accurately realized.
Based on the same idea, as shown in fig. 7, an electronic device includes: a memory 71, a processor 72; wherein the content of the first and second substances,
the memory 71 is configured to store one or more computer instructions, wherein the one or more computer instructions, when executed by the processor 72, implement the laser projection image processing method as described above.
Based on the same idea, fig. 8 is a schematic structural diagram of another laser projection image processing apparatus according to an embodiment of the present invention. The device includes:
an image data module 81, configured to provide image data to be displayed, where the image data to be displayed at least includes: a pixel luminance value;
a brightness control module 82 containing pixel addresses and corresponding brightness correction values;
and the image data superposition module 83 is configured to sequentially project and display each pixel according to the brightness correction value and the corresponding pixel brightness value in the brightness control table according to the first pixel address in the acquired row and column index number, so as to obtain a projected image.
The image data module 81 is configured to provide image data to be displayed, where the image data to be displayed includes data related to image display, such as color of pixel to be projected, brightness value of pixel, and the like.
In order to accurately control the display effect of each pixel point in the projected image, when laser projection is controlled, correction is performed according to the brightness correction value of each pixel point in the brightness control module 82, and projection is performed according to the corrected pixel brightness value.
In practical applications, the pixel brightness needs to be corrected by the image data superposition module 83. Specifically, assuming that the luminance value of the projection pixel is D, the luminance correction value is C and the luminance value of the pixel is a as described above, D is a + C. During actual projection, projection and display of pixel points are required according to the projection brightness values.
In one or more embodiments of the invention, further comprising: an image data buffer 84 for controlling the projection time of the received image data to be displayed;
an address counter 85, configured to count in the order of the pixel addresses in the brightness control table module according to the projection time provided by the image data buffer.
The image buffer 84 is used for buffering received image data to be displayed. Specifically, as described above, when the brightness is adjusted by actually performing laser projection, the projection is turned off at a position where the brightness is significantly too bright, in other words, the start position and the end position of the brightness are not displayed, in order to simplify the adjustment operation.
As described above, after determining the row and column index numbers to be displayed, each pixel point in the current row or column is projected and displayed once, and the address counter 85 is required to output corresponding pixel address information (e.g., a pixel address pointer) for searching the corresponding brightness correction value in the brightness control table.
In the apparatus, the connection relationship of each module specifically includes: the image data module 81 is connected to the image buffer 84; the image buffer 84 is connected to both the image data superimposing module 83 and the address counter 85; the address counter 85 is connected with the brightness control module 82; the brightness control module 82 is connected with the image data superposition module 83; the image data superposition module 83 is connected to the Laser.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by adding a necessary general hardware platform, and of course, can also be implemented by a combination of hardware and software. With this understanding in mind, the above-described aspects and portions of the present technology which contribute substantially or in part to the prior art may be embodied in the form of a computer program product, which may be embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including without limitation disk storage, CD-ROM, optical storage, and the like.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable coordinate determination device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable coordinate determination device, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable coordinate determination apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable coordinate determination device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer implemented process such that the instructions which execute on the computer or other programmable device provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (11)
1. A laser projection image processing method, applied to a laser controller, the method comprising:
determining a first pixel address according to the acquired row and column index number;
acquiring a brightness control table; wherein the brightness control table comprises: pixel addresses and corresponding luminance correction values;
according to the first pixel address, sequentially projecting and displaying each pixel according to the brightness correction value in the brightness control table to obtain a projection image;
determining a corresponding first pixel address according to the obtained row and column index number, including:
acquiring the pixel brightness value displayed by each pixel address in the row-column index number;
and determining a first pixel address corresponding to the row-column index number according to a preset first brightness threshold and the pixel brightness value.
2. The method according to claim 1, wherein determining the first pixel address corresponding to the row and column index number according to the preset first brightness threshold and the pixel brightness value comprises:
and determining a first start pixel address and a first end pixel address corresponding to the row-column index number according to the preset first brightness threshold and the obtained brightness value of each pixel.
3. The method of claim 2, wherein determining the first start pixel address and the first end pixel address corresponding to the row-column index number further comprises:
and determining the number of effective pixels contained in the row or the column corresponding to the row-column index number and the corresponding pixel address according to the first starting pixel address and the first ending pixel address.
4. The method of claim 3, wherein obtaining the brightness control table comprises:
determining a pixel brightness value corresponding to each pixel address according to the row-column index number;
determining the brightness correction value according to a preset second brightness threshold and the pixel brightness value;
and obtaining the brightness control table based on the pixel address and the corresponding brightness correction value.
5. The method of claim 4, wherein obtaining the brightness control table based on the pixel address and the corresponding brightness correction value comprises:
sequentially determining the pixel address of each pixel according to the row-column index number and the number of the effective pixels;
and obtaining the brightness control table based on the pixel address and the corresponding brightness correction value.
6. The method according to claim 2, wherein the obtaining a projection image by sequentially projecting and displaying pixels according to the brightness correction values in the brightness control table based on the first pixel address comprises:
projecting a first pixel according to the first starting pixel address;
adjusting the brightness value of each pixel according to the brightness correction value;
and sequentially projecting and displaying each pixel according to the pixel address in the brightness control table to obtain a projected image.
7. The method of claim 4, wherein said adjusting each of said pixel luminance values according to said luminance correction value comprises:
acquiring the pixel brightness value and the brightness correction value;
and superposing the pixel brightness value and the brightness correction value to obtain a projection pixel brightness value.
8. A laser projection image processing apparatus, characterized in that the apparatus comprises:
the address determining module is used for determining a first pixel address according to the acquired row and column index number;
the acquisition module is used for acquiring a brightness control table; wherein the brightness control table comprises: pixel addresses and corresponding luminance correction values;
the projection module is used for sequentially projecting and displaying each pixel according to the brightness correction value in the brightness control table according to the first pixel address to obtain a projection image;
the address determining module is used for acquiring the pixel brightness value displayed by each pixel address in the row-column index number; and determining a first pixel address corresponding to the row-column index number according to a preset first brightness threshold and the pixel brightness value.
9. An electronic device, comprising: a memory, a processor; wherein the content of the first and second substances,
the memory is to store one or more computer instructions, wherein the one or more computer instructions, when executed by the processor, implement the laser projection image processing method of any of claims 1 to 7.
10. A laser projection image processing apparatus, characterized in that the apparatus comprises:
an image data module, configured to provide image data to be displayed, where the image data to be displayed at least includes: a pixel luminance value;
the brightness control table module comprises pixel addresses and corresponding brightness correction values;
the image data superposition module is used for sequentially projecting and displaying each pixel according to a first pixel address in the acquired row and column index number and the brightness correction value and the corresponding pixel brightness value in the brightness control table to obtain a projected image, wherein the first pixel address is the first pixel address determined according to the acquired row and column index number;
determining a corresponding first pixel address according to the obtained row and column index number, including:
acquiring the pixel brightness value displayed by each pixel address in the row-column index number;
and determining a first pixel address corresponding to the row-column index number according to a preset first brightness threshold and the pixel brightness value.
11. The apparatus of claim 10, further comprising:
the image data buffer is used for controlling the projection time of the received image data to be displayed;
and the address counter is used for counting according to the projection time provided by the image data buffer and the sequence of the pixel addresses in the brightness control table module.
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| CN110087068B (en) * | 2019-06-05 | 2021-06-08 | 歌尔光学科技有限公司 | Image brightness measuring method, device, equipment and computer readable storage medium |
| CN111385946B (en) * | 2020-03-23 | 2022-05-27 | 北京经纬恒润科技股份有限公司 | Pixel lamp brightness control method and device |
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