CN110944135B - Power control method, electronic device and storage medium - Google Patents
Power control method, electronic device and storage medium Download PDFInfo
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- CN110944135B CN110944135B CN201911130150.3A CN201911130150A CN110944135B CN 110944135 B CN110944135 B CN 110944135B CN 201911130150 A CN201911130150 A CN 201911130150A CN 110944135 B CN110944135 B CN 110944135B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/005—Control of transmission; Equalising
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the invention relates to the field of data processing, and discloses a power control method, electronic equipment and a storage medium. In some embodiments of the present application, a power control method includes: determining the hole filling rate of a first image according to the first image shot by a depth camera, wherein the hole filling rate of the first image is determined according to the depth information of the first image; judging whether the hole filling rate of the first image meets a preset hole filling requirement or not; and determining whether to adjust the transmitting power of the infrared transmitter of the depth camera according to the judgment result. In the embodiment, whether power needs to be adjusted or not can be automatically judged, and the intelligence of the electronic equipment is improved.
Description
Technical Field
Embodiments of the present invention relate to the field of data processing, and in particular, to a power control method, an electronic device, and a storage medium.
Background
At present, binocular vision modules are all provided with structured light infrared LEDs. The infrared LED is turned on and appropriate power is output, so that the success rate of binocular stereo matching and the quality of a visual depth map (or parallax) can be remarkably improved in certain scenes, the percentage of holes is remarkably reduced, and the accuracy of depth detection is improved.
However, the inventors found that at least the following problems exist in the prior art: at present, the power of the infrared LED of the binocular vision module needs to be manually adjusted.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of embodiments of the present invention is to provide a power control method, an electronic device, and a storage medium, which enable automatic determination of whether power needs to be adjusted, thereby improving intelligence of the electronic device.
In order to solve the above technical problem, an embodiment of the present invention provides a power control method, including: determining the hole filling rate of a first image according to the first image shot by a depth camera, wherein the hole filling rate of the first image is determined according to the depth information of the first image; judging whether the hole filling rate of the first image meets a preset hole filling requirement or not; and determining whether to adjust the transmitting power of the infrared transmitter of the depth camera according to the judgment result.
An embodiment of the present invention also provides 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 power control method as mentioned in the above embodiments.
Embodiments of the present invention also provide a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the power control method mentioned in the above embodiments.
Compared with the prior art, the method and the device for determining the depth image of the camera in the depth image of the camera are used for judging whether the transmitting power of the infrared transmitter of the depth camera in the current scene needs to be adjusted or not based on the cavity filling rate which is an index indicating the quality of the depth image, so that the transmitting power of the infrared transmitter is more suitable for the current scene, the situation of electric quantity consumption caused by continuously increasing the transmitting power for improving the cavity filling rate is avoided, and the situation of insufficient depth detection precision caused by too low transmitting power is also avoided.
In addition, before determining the hole filling rate of the first image according to the first image shot by the depth camera, the power control method further includes: acquiring a texture value of the first image, wherein the texture value is determined according to the gradient of the interested area of the first image in the X-axis direction and the gradient of the interested area in the Y-axis direction; judging whether the first image has texture or not according to the texture value of the first image and a preset texture threshold; if yes, determining the hole filling rate of the first image according to the first image shot by the depth camera; if not, judging whether the infrared transmitter is started, if so, executing a step of determining the hole filling rate of a first image according to the first image shot by the depth camera; and if the infrared emitter is determined not to be started, adjusting the sending power of the infrared emitter to a preset first default power, re-shooting the first image, and executing the step of determining the hole filling rate of the first image according to the first image shot by the depth camera. In this embodiment, the electronic device is enabled to automatically turn on the infrared emitter in case the infrared emitter needs to be turned on.
In addition, before acquiring the texture value of the first image, the power control method further includes: and determining that the region of interest of the first image is normally exposed. In the implementation, when the determined environment is too bright, the power of the infrared transmitter is not adjusted, so that unnecessary resource waste is avoided.
In addition, the preset cavity filling requirement is as follows: the difference value between the void filling rate of the first image and the target value of the preset void filling rate is smaller than a preset first threshold value; or, the preset cavity filling requirement is as follows: the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset second threshold value; the second image is a previous frame image of the first image; or, the preset cavity filling requirement is as follows: the difference value between the hole filling rate of the first image and the target value is smaller than a preset first threshold value, or the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset second threshold value.
In addition, according to the judgment result, whether the transmitting power of the infrared transmitter of the depth camera is adjusted is determined, and the method specifically comprises the following steps: and if the determined judgment result indicates that the hole filling rate of the first image does not accord with the hole filling requirement, adjusting the transmitting power.
In addition, according to the judgment result, whether the transmitting power of the infrared transmitter of the depth camera is adjusted is determined, and the method specifically comprises the following steps: if the judgment result indicates that the cavity filling rate of the first image meets the cavity filling requirement, judging whether the shooting scene of the first image is a preset special scene or not according to the judgment parameter of the first image and a preset judgment standard; the evaluation parameter comprises depth information of the first image and/or a brightness index of the first image; if yes, adjusting the transmitting power; if not, the transmit power is not adjusted. In the embodiment, the transmission power of the electronic equipment under a special scene is adjusted, so that the applicable scene of the power control method is improved, and a better adjusting effect can be obtained.
In addition, the evaluation parameters are depth information of the first image and a cavity filling rate of the first image, and the preset judgment standard is as follows: if the depth information of the first image indicates that effective depth information exists in the first image, and the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset third threshold value, determining that the shooting scene of the first image is a preset special scene; or, the judgment parameter is a brightness index of the first image, and the preset judgment standard is as follows: if the brightness index of the first image indicates that the current scene is very bright, determining that the shooting scene of the first image is a preset special scene; or, the evaluation parameter is depth information of the first image, and the preset judgment standard is as follows: if the depth information of the first image indicates that effective depth information does not exist in the region of interest of the first image, determining that the shooting scene of the first image is a preset special scene; or the judgment parameters are the cavity filling rate of the first image, the depth information of the first image and the brightness index of the first image, and the preset judgment standard is as follows: if the depth information of the first image indicates that effective depth information exists in the first image, and the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset third threshold value, or if the brightness index of the first image indicates that the current scene is very bright, or the depth information of the first image indicates that effective depth information does not exist in the region of interest of the first image, it is determined that the shooting scene of the first image is a preset special scene.
In addition, adjusting the transmission power specifically includes: and adjusting the transmitting power to a second default power corresponding to the special scene.
In addition, adjusting the transmission power specifically includes: determining the adjustment direction of the transmitting power of the infrared transmitter according to the hole filling rate of the first image, the hole filling rate of the second image and the size relationship between the transmitting power corresponding to the first image and the transmitting power corresponding to the second image; adjusting the transmitting power according to the adjusting direction; the second image is a frame image before the first image.
In addition, before determining the adjustment direction of the transmission power of the infrared transmitter, the power adjustment method further includes: and determining that the hole filling rate of the first image and the hole filling rate of the second image meet a constraint relation, wherein the constraint relation is that the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than or equal to a fourth threshold value.
In addition, adjusting the transmission power specifically includes: judging whether the first image is a first frame image shot after the infrared transmitter is started or not according to the transmitting power corresponding to the first image and the transmitting power corresponding to the second image; if yes, adjusting the transmitting power of the infrared transmitter according to a preset adjusting direction; if not, determining the adjustment direction of the transmitting power of the infrared transmitter according to the hole filling rate of the first image, the hole filling rate of the second image and the size relationship between the transmitting power corresponding to the first image and the transmitting power corresponding to the second image; adjusting the transmitting power according to the adjusting direction; the second image is a frame image before the first image.
In addition, adjusting the transmission power specifically includes: judging whether the infrared emitter is started or not; if the infrared emitter is not started, adjusting the emission power of the infrared detector to a preset third default power; if the infrared emitter is determined to be started, determining the adjustment direction of the emission power of the infrared emitter according to the void filling rate of the first image, the void filling rate of the second image and the size relationship between the emission power corresponding to the first image and the emission power corresponding to the second image; adjusting the transmitting power according to the adjusting direction; the second image is a frame image before the first image.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a flow chart of a power control method according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a process of adjusting power according to a first embodiment of the invention;
FIG. 3 is a schematic flow chart of a first adjustment mode according to the first embodiment of the present invention;
FIG. 4 is a flow chart illustrating a second modification of the first embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for determining whether to adjust the transmission power according to the first embodiment of the present invention;
fig. 6 is a flowchart illustrating a power adjustment process for determining whether a shooting scene of a first image is a special scene and each special scene according to the first embodiment of the present invention;
fig. 7 is a power control method according to a second embodiment of the present invention;
fig. 8 is a schematic configuration diagram of a power control apparatus according to a third embodiment of the present invention;
fig. 9 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including but not limited to".
In the description of the present disclosure, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present disclosure, "a plurality" means two or more unless otherwise specified.
The first embodiment of the present invention relates to a power control method, which is applied to an electronic device, where the electronic device may be a depth camera itself, a device with a depth camera installed therein, or another device, such as a server or a terminal, communicatively connected to the depth camera or the device with a depth camera installed therein. The depth camera may be a binocular camera or the like. As shown in fig. 1, the power control method includes:
step 101: and determining the hole filling rate of the first image according to the first image shot by the depth camera.
Specifically, the hole filling rate of the first image is determined based on the depth information of the first image. The electronic device analyzes the first image to determine depth information in each pixel in the first image. For some pixel points in the first image, because the binoculars are not matched, the pixel points have no depth (or parallax) information, or the depth (or parallax) information is smaller than a preset value, the depth information of the pixel points is considered to be invalid, and the pixel points are the holes. And the electronic equipment divides the number of the pixel points with the effective depth information by the total number of the pixel points of the first image to obtain the hole filling rate of the first image. The preset value can be set as required, for example, set to 0, or other values.
Step 102: and judging whether the hole filling rate of the first image meets the preset hole filling requirement or not.
Specifically, the hole filling requirement may be determined according to the usage scenario of the first image, and the hole filling requirement is exemplified below.
In a first example, the preset hole filling requirement is: the difference value between the hole filling rate of the first image and the target value of the preset hole filling rate is smaller than a preset first threshold value.
In a second example, the predetermined hole filling requirements are: the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset second threshold value; the second image is a frame image before the first image.
In a third example, the preset hole filling requirement is: the difference value between the hole filling rate of the first image and the target value of the preset hole filling rate is smaller than a preset first threshold value, or the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset second threshold value.
It should be noted that, as can be understood by those skilled in the art, in practical applications, the cavity filling requirement may also be other requirements, and this embodiment is merely an example, and does not limit the specific content of the cavity filling requirement.
It should be noted that, as will be understood by those skilled in the art, in practical applications, the target value of the void filling rate may be set as needed, for example, to any value in the range from 50% to 100%, the first threshold may be set as needed, for example, to any value in the range from 0% to 3%, and the second threshold may also be set as needed, for example, to any value in the range from 0% to 2%, which is not limited in the present embodiment.
It is worth mentioning that the emission power of the infrared emitter is automatically adjusted based on the hole filling rate, and the intelligence of the electronic equipment is improved.
Step 103: and determining whether to adjust the transmitting power of the infrared transmitter of the depth camera according to the judgment result.
Specifically, from the principle of binocular stereo vision, the more detailed the subject in the scene is, the higher the accuracy of stereo matching, and the more accurate the depth map (or disparity map) generated, the fewer holes. Therefore, the electronic device can determine whether to adjust the transmitting power of the infrared emitter according to whether the hole filling rate of the first image currently shot by the depth camera meets the hole filling requirement.
In one embodiment, the electronic device adjusts the transmission power if the determination result indicates that the hole filling rate of the first image does not meet the hole filling requirement. And if the filling requirement of the cavity is determined to be met, the transmitting power of the infrared transmitter is not adjusted.
It should be noted that, as can be understood by those skilled in the art, if the hole filling rate of the first image meets the hole filling requirement, the electronic device may not adjust the transmission power of the infrared emitter, and may also determine whether the transmission power of the infrared emitter needs to be adjusted by combining with other parameters of the first image.
The manner in which the electronic device adjusts the transmit power is illustrated below.
In a first example, if it is determined that the hole filling rate does not meet the hole filling requirement, the process of adjusting the transmission power is as follows: determining the adjustment direction of the transmitting power of the infrared transmitter according to the hole filling rate of the first image, the hole filling rate of the second image and the size relationship between the transmitting power corresponding to the first image and the transmitting power corresponding to the second image; adjusting the transmitting power according to the adjusting direction; the second image is a frame image before the first image.
Optionally, before determining the adjustment direction of the emission power of the infrared emitter, the electronic device determines that the hole filling rate of the first image and the hole filling rate of the second image satisfy a constraint relationship, where the constraint relationship is that a difference between the hole filling rate of the first image and the hole filling rate of the second image is less than or equal to a fourth threshold.
In a second example, the electronic device determines whether the first image is a first frame image shot after the infrared transmitter is turned on according to the transmitting power corresponding to the first image and the transmitting power corresponding to the second image; if yes, adjusting the transmitting power of the infrared transmitter according to a preset adjusting direction; if not, determining the adjustment direction of the emission power of the infrared emitter according to the cavity filling rate of the first image, the cavity filling rate of the second image and the size relationship between the emission power corresponding to the first image and the emission power corresponding to the second image; adjusting the transmitting power according to the adjusting direction; the second image is a frame image before the first image. In this case, the preset adjusting direction may be turned up or turned down. When the adjustment is performed according to a certain adjustment direction, a certain preset value may be adjusted, for example, if the adjustment direction is increased, the transmission power is increased by 10 mw.
It should be noted that, as can be understood by those skilled in the art, in practical application, the preset value may be set according to the granularity supported by the hardware of the depth camera, for example, if the minimum adjustment amount supported by the depth camera is 5 milliwatts, the preset value may be set to 5 milliwatts, and the embodiment does not limit the specific value of the preset value.
In a third example, it is determined whether the infrared emitter is on; if the infrared emitter is determined not to be started, adjusting the emission power of the infrared detector to a preset third default power; if the infrared emitter is determined to be started, determining the adjustment direction of the emission power of the infrared emitter according to the void filling rate of the first image, the void filling rate of the second image and the size relationship between the emission power corresponding to the first image and the emission power corresponding to the second image; adjusting the transmitting power according to the adjusting direction; the second image is a frame image before the first image. The value of the third default power may be set according to experience or experimental results, and may be the same as or different from the first default power.
In one embodiment, the electronic device may combine the adjustment modes of the second example and the third example. For example, when the transmission power is adjusted based on a certain image, it is assumed that pre _ TX represents the transmission power of a previous frame, cur _ TX represents the transmission power of a current frame, pre _ hole _ filling represents the hole filling rate of the previous frame, cur _ hole _ filling represents the hole filling rate of the current frame, and the preset adjustment direction is increasing. When triggering an adjustment of the transmit power, assumptions and heuristics are made first, since the algorithm does not know at this point whether to adjust the power up or down. Namely: if the hole filling rate is increased, the transmitting power is increased firstly; if the hole filling rate is reduced, the transmit power is reduced. And judging whether the current scene is the hole filling rate which is increased along with the increase of the power or the current scene which is reduced along with the increase of the power according to the result of the first test. Specifically, the process of adjusting power as shown in fig. 2 includes the following steps:
step 201: it is determined whether pre _ TX is 0 and cur _ TX is the first default power. If yes, go to step 202, otherwise, go to step 204.
Step 202: pre _ hold _ filing is cur _ hold _ filing, and pre _ TX is cur _ TX.
Step 203: the transmit power is increased. And then ending the adjusting process.
Step 204: it is determined whether pre _ TX equals 0 and cur _ TX equals 0. If yes, go to step 205, otherwise, go to step 206.
Step 205: turning on an infrared transmitter, and adjusting the transmitting power of the infrared transmitter to a first default power; pre _ TX equals 0. And then ending the adjusting process.
Step 206: whether pre _ hold _ filing > cur _ hold _ filing is judged. If yes, go to step 207, and if not, go to step 208.
Step 207: the transmit power is adjusted in a first manner. The flow is then ended.
Specifically, as shown in fig. 3, step 207 includes the following sub-steps:
step 2071: whether cur _ TX is larger than or equal to pre _ TX is judged. If not, go to step 2072, otherwise go to step 2073.
Step 2072: let pre _ TX be cur _ TX, the transmit power is reduced. Wherein the reduced value can be set as desired. The flow is then ended.
Step 2073: let pre _ TX be cur _ TX.
Step 2074: it is determined whether cur TX is greater than or equal to the maximum transmit power. If yes, go to step 2075, otherwise go to step 2076.
Step 2075: the transmit power is adjusted to a maximum transmit power. The flow is then ended.
Step 2076: the transmit power is increased. Wherein the increased value can be set as desired.
Step 208: it is determined whether pre _ hold _ filing ═ cur _ hold _ filing holds. If yes, the adjustment process is ended, otherwise, step 209 is executed.
Step 209: the transmit power is adjusted in a second manner.
Specifically, as shown in fig. 4, step 209 comprises the following sub-steps:
step 2091: whether cur _ TX is larger than or equal to pre _ TX is judged. If yes, go to step 2092, otherwise go to step 2093.
Step 2092: let pre _ TX ═ cur _ TX, reduce the transmit power. Wherein the reduced value can be set as desired. The flow is then ended.
Step 2093: let pre _ TX be cur _ TX.
Step 2094: it is determined whether cur TX is greater than or equal to the maximum transmit power. If yes, go to step 2095, otherwise, go to step 2096.
Step 2095: the transmit power is adjusted to a maximum transmit power. The flow is then ended.
Step 2096: the transmit power is increased. Wherein the increased value can be set as desired.
It should be noted that, as can be understood by those skilled in the art, other adjustment manners may be adopted in practical applications, which are not listed here.
In one embodiment, the electronic device adjusts the transmission power if the determination result indicates that the hole filling rate of the first image does not meet the hole filling requirement. If the situation that the cavity filling requirement is met is determined, judging whether the shooting scene of the first image is a preset special scene or not according to the judgment parameters of the first image and a preset judgment standard; the evaluation parameters comprise depth information of the first image and/or a brightness index of the first image; if yes, adjusting the transmitting power; if not, the transmit power is not adjusted.
It should be noted that, those skilled in the art can understand that, in practical applications, the judgment parameter may also be other image parameters, and this embodiment is merely an example, and does not limit the type of the parameter used in practical applications.
It is worth mentioning that the emission power of the electronic equipment under a special scene is adjusted, so that the applicable scene of the power control method is improved, and a better adjusting effect can be obtained.
The evaluation parameters and the corresponding evaluation criteria are exemplified below.
In one embodiment, the evaluation parameters are depth information of the first image and a hole filling rate of the first image, and the preset judgment criteria are as follows: and if the depth information of the first image indicates that effective depth information exists in the first image, and the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset third threshold value, determining that the shooting scene of the first image is a preset special scene. Specifically, if the object is far from the depth camera, the infrared transmitter is turned on or off, and the transmission power is adjusted in a small amplitude based on the current transmission power, the change of the cavity filling rate is small. If the transmitting power is increased to the infrared effective transmitting power value under the long distance obtained based on experiments or experiences, the adjustment of the transmitting power can increase the hole filling rate, and therefore, the situation can be treated as a special scene.
It should be noted that the third threshold may be set as needed, and this embodiment is not limited, and the third threshold may be equal to or different from the first threshold.
In one embodiment, the evaluation parameter is a brightness index of the first image, and the predetermined criteria are: and if the brightness index of the first image indicates that the current scene is very bright, determining that the shooting scene of the first image is a preset special scene. Specifically, if the ambient brightness is too high, the emission power is adjusted under the condition of low emission power, and the void filling rate does not change greatly before and after the adjustment. If the transmitting power is adjusted to be higher, the adjustment of the transmitting power can effectively improve the hole filling rate. Therefore, this case can be treated as a special scene. If the brightness index is increased along with the increase of the brightness, the current scene is considered to be very bright when the brightness index is larger than the brightness index threshold, and if the brightness index is increased along with the increase of the brightness, the brightness index is smaller than the brightness index threshold, the current brightness is considered to be very bright. The brightness index threshold may be set according to the selected brightness index and the project requirement, and the embodiment is not limited.
In one embodiment, the auto-exposure control algorithm defines a corresponding relationship between the actual brightness and a value of the brightness parameter (lux _ index), and can convert the actual brightness into the lux _ index. If the brightness index is the brightness parameter (lux _ index) in the automatic exposure control algorithm, the brightness index threshold may be defined according to the implementation of the automatic exposure control algorithm and the light sensitivity of the light sensor in the depth camera. For example, if the luminance parameter (lux _ index) ranges from 0 to 400, i.e. the luminance parameter is 0 when the actual luminance is the brightest, and the luminance index decreases as the luminance increases, the luminance index threshold may be any value in 180-.
In one embodiment, the evaluation parameter is depth information of the first image, and the preset judgment criteria are: and if the depth information of the first image indicates that no effective depth information exists in the region of interest of the first image, determining that the shooting scene of the first image is a preset special scene. Specifically, the region of interest is centered in a Field of View (FOV) of the first image, the size of the region being defined as a percentage of the FOV, e.g., 40% of the FOV, and the size of the ROI region being adjustable. Since the ROI region has no valid depth information, it may be far from the object or the object is blind, which may adjust the transmit power to a maximum for further judgment.
In one embodiment, the evaluation parameter is a hole filling rate of the first image, depth information of the first image, and a brightness index of the first image, and the preset evaluation criterion is: if the depth information of the first image indicates that effective depth information exists in the first image, and the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset third threshold value, or if the brightness index of the first image indicates that the current scene is very bright, or the depth information of the first image indicates that effective depth information does not exist in the region of interest of the first image, it is determined that the shooting scene of the first image is a preset special scene.
It should be noted that, those skilled in the art may understand that the evaluation parameter may also be other parameters, and in practical applications, those skilled in the art may increase the evaluation parameter of the response, the judgment standard of the special scenario, and the processing manner of the special scenario according to other special scenarios found in the use or experiment process of the electronic device, which are only exemplified herein.
In one embodiment, if the shooting scene of the first image is a preset special scene, the adjusting the transmission power specifically includes: and adjusting the transmitting power to a second default power corresponding to the special scene.
For example, as shown in fig. 5, taking a third example of the hole filling requirement as an example, the electronic device determining whether to adjust the transmission power based on the hole filling rate includes the following steps:
step 501: and judging whether the difference value between the hole filling rate of the first image and the target value of the preset hole filling rate is smaller than a preset first threshold value.
Specifically, if the difference between the hole filling rate of the first image and the target value of the hole filling rate is small, step 503 is executed, and if the difference between the hole filling rate of the first image and the target value of the hole filling rate is large, it indicates that the image captured under the current emission power of the infrared emitter cannot meet the use requirement of the first image, and step 502 is executed.
Step 502: and judging whether the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset second threshold value. If yes, step 503 is executed, and if the difference between the hole filling rate of the first image and the hole filling rate of the second image is large, it is indicated that, in the present situation, the quality of the image shot by the depth camera can be effectively improved by adjusting the transmission power of the infrared transmitter, and the transmission power can be further adjusted, and step 504 is executed.
Step 503: and judging whether the shooting scene of the first image is a preset special scene. Specifically, in some special scenes, the reason why the hole filling rate of the first image reaches the target value, or the reason why the change value before and after the hole filling rate is not large after the transmission power is adjusted is that the current ambient brightness is very bright, and other special factors. Therefore, in the present embodiment, a special scene determination step is added to screen some known special scenes. When the shooting scene is a special scene, even if the hole filling rate of the first image meets the hole filling requirement, step 504 is executed to further improve the shooting quality, otherwise, step 505 is executed.
Step 504: the transmit power is adjusted.
Step 505: the transmit power is not adjusted.
It should be noted that, in the example shown in fig. 5, the manner of adjusting the transmission power when the first image does not meet the cavity filling requirement is the same as the manner of adjusting the transmission power when the shooting scene of the first image is a special scene, and those skilled in the art can understand that in practical application, different adjustment manners may also be adopted. For example, when the first image does not meet the hole filling requirement, the manner of adjusting the transmission power is as follows: determining the adjustment direction of the transmitting power of the infrared transmitter according to the hole filling rate of the first image, the hole filling rate of the second image and the size relationship between the transmitting power corresponding to the first image and the transmitting power corresponding to the second image; adjusting the transmitting power according to the adjusting direction; the second image is a frame image before the first image. When the shooting scene of the first image is a special scene, the mode of adjusting the transmitting power is as follows: adjusting the transmitting power to a second default power corresponding to the special scene; or adjusting the transmitting power to a second default power corresponding to the special scene; determining the adjustment direction of the transmitting power of the infrared transmitter according to the hole filling rate of the first image, the hole filling rate of the second image and the size relationship between the transmitting power corresponding to the first image and the transmitting power corresponding to the second image; adjusting the transmitting power according to the adjusting direction; the second image is a frame image prior to the first image. Fig. 5 is an example only, and is not intended to be limiting.
In one example, the electronic device determines whether the shooting scene of the first image is a special scene and a power adjustment process in each special scene is shown in fig. 6, and includes the following steps:
step 601: and judging whether the first image meets the first requirement. The first requirement is that the depth information of the first image indicates that effective depth information exists in the first image, and the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset third threshold value.
Specifically, if the depth camera is far away from the measured object, after the infrared transmitter is turned on with the first default power, the value of the effective distance exists in the region of interest, and the hole filling rate does not change much after the infrared transmitter is turned off/on, which indicates that the current first default power is not helpful to the improvement of the hole filling rate due to the distance. Therefore, if the depth information of the first image indicates that there is valid depth information in the first image, and the difference between the hole filling rate of the first image and the hole filling rate of the second image is smaller than the preset third threshold, step 602 is executed to change the transmission power to the second default power in the special scene, that is, the remote default power (tx _ far _ default) with a larger value, otherwise, step 603 is executed.
Step 602: the transmit power is adjusted to the remote default power. The flow is then ended.
Step 603: and judging whether the first image meets the second requirement. The second requirement is that the luminance index is greater than a preset luminance index threshold.
Specifically, in some scenarios, the ambient brightness is very bright, resulting in an insignificant effect of increasing the transmit power based on the current transmit power. The ambient brightness is determined based on the brightness index (lux _ index), and the brighter the ambient, the smaller the lux _ index. If the brightness index of the first image is greater than the preset brightness index threshold, step 604 is executed to modify the transmission power to a second default power in the special scene, that is, a higher-brightness default power with a larger value, otherwise, step 605 is executed.
Step 604: the transmit power is adjusted to a high brightness default power. The flow is then ended.
It should be noted that, in practical applications, if it is determined that lux _ index is smaller than the brightness index threshold, it is determined that the current environment is too bright, and in a case that the current scene does not belong to other special scenes, turning on or turning off the infrared emitter has little influence on the hole filling rate, in which case, the infrared detector may be turned off, so that the transmission power of the infrared detector is 0.
Step 605: and judging whether the first image meets the third requirement. A third requirement is that no valid depth information is present in the region of interest of the first image.
Specifically, there is no valid depth information (distance value) in the region of interest, and it may be that the object is far from the depth camera or that the object is in a dead zone. Therefore, if there is no effective depth information in the region of interest of the first image, step 606 may be executed to adjust the transmission power to a second default power, i.e. a maximum power, in the special scene, so as to further determine the specific situation.
Step 606: the transmission power is adjusted to the maximum power, and then the process ends.
It should be noted that fig. 6 is only an example, and in practical applications, after step 602, step 604 and step 606, other judgments may be performed to further adjust the transmission power, for example, after step 602, step 604 and step 606 are executed, the adjustment direction of the transmission power of the infrared emitter is determined according to the hole filling rate of the first image and the hole filling rate of the second image, and the magnitude relationship between the transmission power corresponding to the first image and the transmission power corresponding to the second image; adjusting the transmitting power according to the adjusting direction; the second image is a frame image before the first image. The present embodiment is illustrative only and not limiting.
The above description is only for illustrative purposes and does not limit the technical aspects of the present invention.
Compared with the prior art, the power control method provided in the embodiment judges whether the transmitting power of the infrared transmitter of the depth camera needs to be adjusted in the current scene based on the hole filling rate, which is an index indicating the quality of the depth image, so that the transmitting power of the infrared transmitter is more suitable for the current scene, the situation of power consumption caused by continuously increasing the transmitting power for improving the hole filling rate is avoided, and the situation of insufficient depth detection precision caused by too low transmitting power is also avoided.
The second embodiment of the present invention relates to a power control method, and is further improved on the basis of the first embodiment, and the specific improvements are as follows: before step 101, it is determined whether to turn on the infrared emitter based on the texture value of the first image.
Specifically, as shown in fig. 7, the present embodiment includes steps 701 to 707, wherein steps 705 to 707 are substantially the same as steps 101 to 103 in the first embodiment, and are not repeated here. The following mainly introduces the differences:
step 701: a texture value of the first image is obtained.
Specifically, the texture value is determined based on the gradient in the X-axis direction and the gradient in the Y-axis direction of the region of interest of the first image. For example, the texture value may be an average gradient in the X-axis direction and the Y-axis direction of the region of interest of the first image.
It should be noted that, as will be understood by those skilled in the art, in practical applications, other parameters may be used for the texture value, and this embodiment is merely an example.
In one embodiment, the region of interest of the first image is determined to be normally exposed prior to acquiring the texture values of the first image. Specifically, when the electronic device starts to operate, automatic exposure adjustment is performed first. The electronics count the gray scale values (Y) of the pixels in the region of interest and make exposure adjustments based on the gray scale value of each pixel. For example, the region of interest is divided into m x n sub-regions, such as 3 x 3, where m and n may be any positive integer. For each sub-region of m x n, a weighting coefficient is set, which is adjustable. And calculating the gray level average value of the subarea by the pixels in each subarea. And multiplying the gray average value of each sub-area by the weighting coefficient of the corresponding sub-area to obtain a weighted gray value. And adding the weighted gray values of all the sub-areas in the region of interest to obtain the gray value of the region of interest. If the gray value of the region of interest indicates that the region of interest is overexposed, the electronics can adjust the Exposure by an Auto Exposure Control (AEC) algorithm until the region of interest is not overexposed. Alternatively, if the exposure time is adjusted to be the shortest under high light conditions, such as an outdoor glare environment, and the exposure is still overexposed after the minimum sensor gain and the processor gain, the subsequent steps are not executed and the infrared emitter is determined not to be turned on directly.
It is worth mentioning that, because the infrared emitter is turned on or off in a high-brightness environment, the influence on the image quality is small, and when the environment is determined to be too bright, the power adjustment of the infrared emitter is not performed, so that unnecessary resource waste is avoided.
Step 702: and judging whether the first image has texture or not according to the texture value of the first image and a preset texture threshold.
Specifically, if it is determined that the first image has no texture, step 703 is performed, otherwise, step 705 is performed.
Step 703: and judging whether the infrared emitter is started or not.
Specifically, step 705 is performed if the ir emitter is turned on, and step 704 is performed if the ir emitter is not turned on.
Step 704: and adjusting the sending power of the infrared transmitter to a preset first default power, and shooting the first image again. Step 705 is then performed.
It is worth mentioning that when the first image has no texture, the pattern required to be projected by the infrared emitter is illustrated, and the details of the texture of the object to be shot are increased. Therefore, whether the infrared emitter is started or not is judged firstly when the first image has no texture, and the infrared emitter is started firstly under the condition that the infrared emitter is not started, so that the electronic equipment can automatically start the infrared emitter under the condition that the infrared emitter needs to be started. Subsequent adjustment operation is carried out based on the image shot after the infrared transmitter is started, so that a judgment cycle can be reduced, and unnecessary resource waste is reduced.
Step 705: and determining the hole filling rate of the first image according to the first image shot by the depth camera.
Step 706: and judging whether the hole filling rate of the first image meets the preset hole filling requirement or not.
Step 707: and determining whether to adjust the transmitting power of the infrared transmitter of the depth camera according to the judgment result.
The above description is only for illustration and does not limit the technical solution of the present invention.
Compared with the prior art, the power control method provided in the embodiment judges whether to start the infrared transmitter based on the texture value when performing infrared adjustment based on the hole filling rate, so that the electronic device can automatically start the infrared transmitter, and performs subsequent adjustment operation based on an image shot after the infrared transmitter is started, thereby reducing one judgment cycle and reducing unnecessary resource waste.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
A third embodiment of the present invention relates to a power control device, as shown in fig. 8, including: a determination module 801, a determination module 802, and an adjustment module 803. The determining module 801 is configured to determine a hole filling rate of a first image according to the first image captured by the depth camera, where the hole filling rate of the first image is determined according to the depth information of the first image. The determining module 802 is configured to determine whether a hole filling rate of the first image meets a preset hole filling requirement. The adjusting module 803 is configured to determine whether to adjust the transmitting power of the infrared emitter of the depth camera according to the determination result.
It should be understood that the present embodiment is a system example corresponding to the first embodiment, and the present embodiment may be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first embodiment.
It should be noted that each module referred to in this embodiment is a logical module, and in practical applications, one logical unit may be one physical unit, may be a part of one physical unit, and may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, elements that are not so closely related to solving the technical problems proposed by the present invention are not introduced in the present embodiment, but this does not indicate that other elements are not present in the present embodiment.
A fourth embodiment of the present invention relates to an electronic apparatus, as shown in fig. 9, including: at least one processor 901; and, memory 902 communicatively connected to at least one processor 901; the memory 902 stores instructions executable by the at least one processor 901, and the instructions are executed by the at least one processor 901, so that the at least one processor 901 can execute the power control method according to the above embodiments.
The electronic device includes: one or more processors 901 and a memory 902, where one processor 901 is taken as an example in fig. 9. The processor 901 and the memory 902 may be connected by a bus or by other means, and fig. 9 illustrates the connection by the bus as an example. Memory 902, which is a non-volatile computer-readable storage medium, may be used to store non-volatile software programs, non-volatile computer-executable programs, and modules 9. The processor 901 performs various functional applications of the device and data processing, i.e., implements the above-described power control method, by executing nonvolatile software programs, instructions, and modules stored in the memory 902.
The memory 902 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store a list of options, etc. Further, the memory 902 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 902 may optionally include memory located remotely from the processor 901, which may be connected to an external device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
One or more modules are stored in the memory 902 and when executed by the one or more processors 901 perform the power control method of any of the method embodiments described above.
The product can execute the method provided by the embodiment of the application, has corresponding functional modules and beneficial effects of the execution method, and can refer to the method provided by the embodiment of the application without detailed technical details in the embodiment.
A fifth embodiment of the present invention relates to a computer-readable storage medium storing a computer program. The computer program realizes the above-described method embodiments when executed by a processor.
That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (13)
1. A method of power control, comprising:
determining a hole filling rate of a first image according to the first image shot by a depth camera, wherein the hole filling rate of the first image is determined according to the depth information of the first image;
judging whether the hole filling rate of the first image meets a preset hole filling requirement or not;
determining whether to adjust the transmitting power of an infrared transmitter of the depth camera according to the judgment result;
before determining the hole filling rate of the first image according to the first image shot by the depth camera, the power control method further comprises the following steps:
acquiring a texture value of the first image, wherein the texture value is determined according to the gradient of the interested area of the first image in the X-axis direction and the gradient of the interested area in the Y-axis direction;
judging whether the first image has texture or not according to the texture value of the first image and a preset texture threshold;
if yes, executing the first image shot according to the depth camera, and determining the hole filling rate of the first image;
if not, judging whether the infrared transmitter is started, if so, executing the first image shot according to the depth camera, and determining the hole filling rate of the first image; if the infrared emitter is determined not to be started, adjusting the sending power of the infrared emitter to a preset first default power, re-shooting the first image, executing the first image shot according to the depth camera, and determining the hole filling rate of the first image.
2. The power control method of claim 1, wherein prior to said obtaining texture values for the first image, the power control method further comprises:
and determining that the region of interest of the first image is normally exposed.
3. The power control method according to claim 1, wherein the predetermined cavity filling requirement is: the difference value between the void filling rate of the first image and the target value of the preset void filling rate is smaller than a preset first threshold value; alternatively, the first and second electrodes may be,
the preset cavity filling requirements are as follows: the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset second threshold value; wherein the second image is a previous frame image of the first image.
4. The power control method according to any one of claims 1 to 3, wherein the determining whether to adjust the transmission power of the infrared emitter of the depth camera according to the determination result specifically includes:
and if the judgment result indicates that the hole filling rate of the first image does not accord with the hole filling requirement, adjusting the transmitting power.
5. The power control method according to any one of claims 1 to 3, wherein the determining whether to adjust the transmission power of the infrared emitter of the depth camera according to the determination result specifically includes:
if the judgment result indicates that the cavity filling rate of the first image meets the cavity filling requirement, judging whether the shooting scene of the first image is a preset special scene or not according to the judgment parameter of the first image and a preset judgment standard; the evaluation parameter comprises depth information of the first image and/or a brightness index of the first image;
if yes, adjusting the transmitting power;
if not, the transmit power is not adjusted.
6. The power control method according to claim 5, wherein the evaluation parameters are depth information of the first image and a hole filling rate of the first image, and the preset evaluation criteria are: if the depth information of the first image indicates that effective depth information exists in the first image, and the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than a preset third threshold value, determining that the shooting scene of the first image is a preset special scene; alternatively, the first and second electrodes may be,
the judgment parameter is a brightness index of the first image, and the preset judgment standard is as follows: if the brightness index of the first image indicates that the current scene is very bright, determining that the shooting scene of the first image is a preset special scene; alternatively, the first and second electrodes may be,
the evaluation parameter is depth information of the first image, and the preset judgment standard is as follows: if the depth information of the first image indicates that no effective depth information exists in the region of interest of the first image, determining that the shooting scene of the first image is a preset special scene.
7. The power control method according to claim 6, wherein the adjusting the transmission power specifically comprises:
and adjusting the transmitting power to a second default power corresponding to the special scene.
8. The power control method according to claim 5, wherein the adjusting the transmission power specifically comprises:
determining the adjustment direction of the emission power of the infrared emitter according to the cavity filling rate of the first image, the cavity filling rate of the second image and the size relationship between the emission power corresponding to the first image and the emission power corresponding to the second image;
adjusting the transmitting power according to the adjusting direction; the second image is a previous frame image of the first image.
9. The power control method of claim 8, wherein prior to determining the direction of adjustment of the transmission power of the infrared emitter, the power adjustment method further comprises:
and determining that the hole filling rate of the first image and the hole filling rate of the second image meet a constraint relation, wherein the constraint relation is that the difference value between the hole filling rate of the first image and the hole filling rate of the second image is smaller than or equal to a fourth threshold value.
10. The power control method according to claim 5, wherein the adjusting the transmission power specifically comprises:
judging whether the first image is a first frame image shot after the infrared transmitter is started or not according to the transmitting power corresponding to the first image and the transmitting power corresponding to the second image;
if the infrared emitter is determined to be the target object, adjusting the emission power of the infrared emitter according to a preset adjustment direction;
if not, determining the adjustment direction of the emission power of the infrared emitter according to the cavity filling rate of the first image, the cavity filling rate of the second image and the size relationship between the emission power corresponding to the first image and the emission power corresponding to the second image; adjusting the transmitting power according to the adjusting direction; the second image is a previous frame image of the first image.
11. The power control method according to claim 5, wherein the adjusting the transmission power specifically comprises:
judging whether the infrared emitter is started or not;
if the infrared emitter is not started, adjusting the emission power of the infrared emitter to a preset third default power;
if the infrared emitter is determined to be started, determining the adjustment direction of the emission power of the infrared emitter according to the void filling rate of the first image, the void filling rate of the second image and the size relationship between the emission power corresponding to the first image and the emission power corresponding to the second image; adjusting the transmitting power according to the adjusting direction; the second image is a frame image previous to the first image.
12. An electronic device, comprising: at least one processor; and the number of the first and second groups,
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 power control method of any one of claims 1 to 11.
13. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the power control method of any of claims 1 to 11.
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