CN114339367A - Video frame processing method, device and equipment - Google Patents
Video frame processing method, device and equipment Download PDFInfo
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- CN114339367A CN114339367A CN202111642787.8A CN202111642787A CN114339367A CN 114339367 A CN114339367 A CN 114339367A CN 202111642787 A CN202111642787 A CN 202111642787A CN 114339367 A CN114339367 A CN 114339367A
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Abstract
The embodiment of the application discloses a video frame processing method, a video frame processing device and video frame processing equipment. According to the method and the device, when the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed, the first position of the target object is determined from the video frame to be displayed, and then the high-altitude parabolic track area of the target object is determined in the video frame to be displayed according to the first position, the size of the target object and the second position of the target object in each video frame before the collected video frame to be displayed, so that specified fuzzy processing is carried out on the privacy area which is except the high-altitude parabolic track area and meets the privacy condition in the video frame to be displayed and displayed. According to the method, the to-be-displayed video frame can be a currently acquired video frame in a section of video being acquired or a video frame in a section of video already acquired, and by the method, the exposure of the privacy of residents can be avoided no matter the currently acquired video frame is displayed in real time or the video frame acquired before playback.
Description
Technical Field
The present application relates to the field of electronic devices, and in particular, to a method, an apparatus, and a device for processing video frames.
Background
The action of high-altitude object throwing is easy to damage pedestrians, properties and the like, in order to automatically detect the high-altitude object throwing, automatically alarm when the high-altitude object throwing is detected, and avoid damage caused by the high-altitude object throwing as much as possible, cameras are arranged around a building in many places, and the high-altitude object throwing appearing around the building is detected through the cameras.
However, as the high-altitude parabolic objects mostly appear in residential buildings, when the high-altitude parabolic objects are detected by using the camera, the original video pictures shot by the camera and containing the high-altitude parabolic objects are easy to expose the privacy of residents.
Disclosure of Invention
The application discloses a video frame processing method, a video frame processing device and video frame processing equipment, which are used for avoiding exposing privacy of residents when a video picture containing a high-altitude parabola is viewed.
According to a first aspect of embodiments of the present application, there is provided a video frame processing method, which is applied to an electronic device, and includes:
acquiring a collected video frame to be displayed;
under the condition that a target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, determining a first position of the target object from the video frame to be displayed;
determining a high-altitude parabolic track area corresponding to the target object in the video frame to be displayed according to the first position, the size of the target object and the determined second position of the target object in each video frame before the acquired video frame to be displayed; the high altitude parabolic track area at least comprises: the first position corresponds to a region in the video frame to be displayed, and the second position corresponds to a region in the video frame to be displayed;
and when the video frame to be displayed is displayed, carrying out specified fuzzy processing on privacy areas which are except the high-altitude parabolic track area and accord with privacy conditions in the video frame to be displayed, and displaying.
Optionally, the determining that a target object meeting a high-altitude parabolic condition exists in the video frame to be displayed includes:
checking whether a recorded target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, and if so, determining that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed;
if the suspected object of the high-altitude parabola recorded in the video frame to be displayed does not accord with the high-altitude parabola condition, whether the suspected object of the high-altitude parabola recorded in the video frame to be displayed accords with the high-altitude parabola condition is checked, and if the suspected object of the high-altitude parabola condition accords with the high-altitude parabola condition, the target object of the high-altitude parabola condition in the video frame to be displayed is determined to exist and recorded.
Optionally, in a case that it is currently not possible to determine whether a target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, the method further includes:
and when the video frame to be displayed is displayed, carrying out specified fuzzy processing on the privacy area meeting the privacy condition in the video frame to be displayed and displaying.
Optionally, the checking whether the suspected object of the high altitude parabola recorded in the video frame to be displayed meets the high altitude parabola condition includes:
and determining whether the suspected object is a target object meeting a high-altitude parabolic condition according to the position of the suspected object in the video frame to be displayed and the position of the same suspected object in at least one video frame obtained before the video frame to be displayed is obtained, and if the suspected object is determined to be the target object, determining that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed.
Optionally, the high altitude parabolic condition at least comprises: feature filter conditions, object filter conditions;
the feature filtering condition is used for filtering objects which exist in high altitude but do not accord with high altitude parabolic features;
the object filtering condition is used for filtering objects which exist in high altitude and conform to the characteristics of the high altitude parabola but belong to non-high altitude parabolas.
Optionally, the specifying the blurring process at least includes: mosaic processing, or layer occlusion processing.
Optionally, if the specified blurring processing is layer occlusion processing, the method further includes:
storing an occlusion layer used in the layer occlusion processing process, the video frame to be displayed and the first position in the same code stream, wherein the occlusion layer and the video frame to be displayed have the same timestamp; the shielding layer at least comprises a shielding sub-image, and the position of the shielding sub-image in the shielding layer is the same as the position of the privacy area meeting the privacy conditions in the video frame to be displayed;
and when the video frame to be displayed is displayed, the shielding layer is positioned above the video frame to be displayed.
According to a second aspect of the embodiments of the present application, there is provided a video frame processing apparatus, which is applied to an electronic device, and includes:
the video frame obtaining unit is used for obtaining the collected video frame to be displayed;
the position determining unit is used for determining a first position of a target object from the video frame to be displayed under the condition that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed;
a high-altitude parabolic track area determination unit, configured to determine, according to the first position, the size of the target object, and a second position of the determined target object in each video frame before the acquired video frame to be displayed, a high-altitude parabolic track area corresponding to the target object in the video frame to be displayed; the high altitude parabolic track area at least comprises: the first position corresponds to a region in the video frame to be displayed, and the second position corresponds to a region in the video frame to be displayed;
and the video frame processing unit is used for carrying out specified fuzzy processing on privacy areas which are except the high-altitude parabolic track area and accord with privacy conditions in the video frame to be displayed and displaying the privacy areas when the video frame to be displayed is displayed.
Optionally, the determining, by the position determining unit, that a target object meeting a high-altitude parabolic condition exists in the video frame to be displayed includes:
checking whether a recorded target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, and if so, determining that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed;
if the suspected object of the high-altitude parabola recorded in the video frame to be displayed does not accord with the high-altitude parabola condition, whether the suspected object of the high-altitude parabola recorded in the video frame to be displayed accords with the high-altitude parabola condition is checked, and if the suspected object of the high-altitude parabola condition accords with the high-altitude parabola condition, the target object of the high-altitude parabola condition in the video frame to be displayed is determined to exist and recorded.
According to a third aspect of embodiments of the present application, there is provided an electronic apparatus including: a processor and a memory;
the memory for storing machine executable instructions;
the processor is used for reading and executing the machine executable instructions stored by the memory so as to realize the video frame processing method.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
according to the technical scheme, when the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed, the first position of the target object is determined from the video frame to be displayed, and then the high-altitude parabolic track area of the target object is determined in the video frame to be displayed according to the first position, the size of the target object and the second position of the target object in each video frame before the collected video frame to be displayed, so that the privacy area which is except the high-altitude parabolic track area and meets the privacy condition in the video frame to be displayed is subjected to specified fuzzy processing and displayed. According to the method, the to-be-displayed video frame can be a currently acquired video frame in a section of video being acquired or a video frame in a section of video already acquired, and by the method, the exposure of the privacy of residents can be avoided no matter the currently acquired video frame is displayed in real time or the video frame acquired before playback.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present specification and together with the description, serve to explain the principles of the specification.
Fig. 1 is a flowchart of a video frame processing method according to an embodiment of the present application;
fig. 2 is a schematic range diagram of a designated area of a shot by a video capture device provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of two privacy zones provided by embodiments of the present application;
FIG. 4 is a schematic diagram of a video frame to be displayed according to an embodiment of the present application;
FIG. 5 is a diagram illustrating an original picture of each video frame in a segment of video according to an embodiment of the present application;
FIG. 6 is a diagram illustrating a display process of video frames in a video segment according to an embodiment of the present application;
FIG. 7 is a diagram illustrating another process for displaying video frames in a video segment according to an embodiment of the present application;
fig. 8 is a schematic diagram of a video frame processing apparatus according to an embodiment of the present application;
fig. 9 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
In order to make the technical solutions provided in the embodiments of the present application better understood and make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions in the embodiments of the present application are described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a flowchart of a video frame processing method according to an embodiment of the present disclosure. As an embodiment, the process shown in fig. 1 may be applied to electronic devices, such as a Video camera, an NVR (Network Video Recorder), and the like. Optionally, when the electronic device is a camera, the video frame to be displayed in this embodiment may be video data acquired by the camera in real time, or the video frame to be displayed may be video data captured by another camera and then sent to the camera. When the device is an NVR, the video frame to be displayed may be video data captured and transmitted by a camera connected to the NVR, or remote video data transmitted from a network, or the like.
As shown in fig. 1, the process may include the following steps:
As an embodiment, the video frame to be displayed may be a video frame in a video recording that needs to be previewed in real time or a video frame in a video recording that needs to be played back. If the video frame to be displayed is a video frame in a video record to be previewed in real time, the video frame to be displayed is an image of a specified area acquired by video acquisition equipment (such as a camera) at the current moment; if the video frame to be displayed is a video frame in the video record that needs to be played back, the video frame to be displayed is an image of a specified area that has been captured by a video capture device (such as a video camera) before the current time. For example, the designated area may refer to an area relating to privacy of residents where a residential building is exposed to the outside (as shown in fig. 2, an image of the designated area is captured by a monitoring camera provided near the residential building).
And 102, under the condition that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed, determining a first position of the target object from the video frame to be displayed.
As an embodiment, if the video frame to be displayed in step 102 is a video frame obtained by the video capture device in real time, determining that the target object meeting the high altitude parabolic condition exists in the video frame to be displayed includes at least the following two cases:
in the first case, a suspected object of a high altitude parabola exists in a video frame to be displayed, the video frame to be displayed is a first video frame capable of determining whether the suspected object is a target object meeting a high altitude parabola condition, and in any video frame before the video frame to be displayed, whether the same suspected object in the video frame is the target object meeting the high altitude parabola condition cannot be determined.
In this embodiment, since it is determined whether the suspected object is a high altitude parabola, at least the positions corresponding to at least two time points of the suspected object in the high altitude are required to determine whether the moving direction, acceleration, and the like of the suspected object in the high altitude meet the high altitude parabola condition. Therefore, in this embodiment, it is required to determine whether the suspected object is a target object meeting a high-altitude parabolic condition according to the position of the suspected object in the video frame to be displayed and the position of the same suspected object in at least one video frame obtained before the video frame to be displayed is obtained, if it is determined that the suspected object is the target object, it is determined that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed, and if it is detected that the suspected object of the high-altitude parabolic condition recorded in the video frame to be displayed meets the high-altitude parabolic condition, it may be determined that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed and is recorded.
After the suspected object in the video frame to be displayed is determined to be the target object, the position of the detected suspected object in the video frame to be displayed can be determined as the first position of the target object, and the position of the same suspected object in each video frame collected before the video frame to be displayed can be determined as the second position of the target object.
In the second case, the video frame to be displayed is a video frame after the first video frame of the target object meeting the high-altitude parabolic condition is determined, that is, before the video frame to be displayed is obtained, the target object meeting the high-altitude parabolic condition is determined and recorded by the previous video frame in the present embodiment, so that it is determined whether the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed, the determination can be achieved by checking whether the target object exists in the video frame to be displayed, and if the target object exists, it is determined that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed.
As another embodiment, if the video frame to be displayed in step 102 is one of the already acquired video frames in a piece of playback video, if the information related to the high altitude parabola in the return visit video is acquired at the same time as the acquisition of the playback video, the information records whether a target object conforming to a high altitude parabola is present in the video frames of the playback video and, when present, the position of the target object in each video frame, therefore, when the present embodiment determines whether there is a target object conforming to the high altitude parabolic condition in the video frame to be displayed, whether the recorded target object which accords with the high-altitude parabola exists in the video frame to be displayed can be checked through the obtained information related to the high-altitude parabola, if so, the target object which accords with the high-altitude parabola condition exists in the video frame to be displayed is determined, and if the target object does not exist, determining that the target object meeting the high-altitude parabolic condition does not exist in the video frame to be displayed.
Optionally, for any of the above embodiments, the high altitude parabolic condition at least includes: feature filter criteria, object filter criteria. The characteristic filtering condition is used for filtering objects which exist in high altitude but do not accord with the high altitude parabolic characteristic, for example, leaves rolled into the high altitude by wind are filtered, and the moving track, the moving direction and the like of the leaves are different from those of the high altitude parabolic characteristic; the object filtering condition is used for filtering objects which exist in high altitude and accord with the high altitude parabolic feature but belong to non-high altitude parabolic features, such as filtering out flying birds which are dived down and accord with the high altitude parabolic feature.
In the embodiment of the application, when determining whether the suspected object meets the high altitude parabolic condition, the feature filtering condition may be used to determine whether the suspected object meets the high altitude parabolic feature, and if so, it may be determined whether the suspected object belongs to an object that is not a high altitude parabolic feature. In this embodiment, the high altitude parabolic feature may include a moving track and a moving speed of an object belonging to a high altitude parabolic feature, for example, the high altitude parabolic feature may include: the moving track is from top to bottom, and the moving speed is within the speed requirement range of the object in free fall.
And 103, determining a high-altitude parabolic track area corresponding to the target object in the video frame to be displayed according to the first position, the size of the target object and the second position of the determined target object in each video frame before the acquired video frame to be displayed.
In this embodiment of the present application, a high altitude parabolic track area corresponding to a target object in a video frame to be displayed at least includes: the first position corresponds to a region in a video frame to be displayed, and the second position corresponds to a region in the video frame to be displayed. In this embodiment, the high-altitude parabolic track area in the video frame to be displayed indicates a moving track of the target object in the high altitude in a time period from a time when the target object first appears in the high altitude to a time when the video frame to be displayed is acquired.
As an embodiment, in this embodiment, when the high-altitude parabolic track area corresponding to the target object is determined in the video frame to be displayed, in order to enable the high-altitude parabolic track area to include an area corresponding to the target object in the video frame to be displayed, the embodiment obtains the size of the target object, so that when the high-altitude parabolic track area corresponding to the target object is determined, the width of the high-altitude parabolic track area is greater than or equal to the size of the target object, so that when the high-altitude parabolic track area corresponding to the target object is displayed in the video frame to be displayed, the target object in the video frame to be displayed can be also completely displayed.
And 104, when the video frame to be displayed is displayed, carrying out specified fuzzy processing on privacy areas which are except the high-altitude parabolic track area and meet privacy conditions in the video frame to be displayed and displaying the privacy areas.
In the embodiment of the present application, the specified blurring process is used to indicate that the privacy area in step 104 is displayed with a mask, and the specified blurring process may be a mosaic process or a layer occlusion process. After the privacy area in the video frame to be displayed is subjected to appointed fuzzy processing, the privacy area in the video frame to be displayed is displayed in a shielding mode, areas except the privacy area are displayed in an unshielded mode, and the privacy information in the privacy area cannot be exposed when the video frame to be displayed is displayed. In this embodiment, in order to avoid exposing the privacy information to the video frame to be displayed, all the areas included in the video frame to be displayed may be set as privacy areas, or an area corresponding to a position in the video frame to be displayed, which is acquired by the video acquisition device, of the area having the privacy information may be set as a privacy area.
Taking the example shown in fig. 3, the area filled with the hatching in fig. 3 is a privacy area, the gray area is a non-privacy area, all the areas included in the video frame to be displayed shown in fig. a in fig. 3 are set as privacy areas, the area inside the dashed line frame in the video frame to be displayed shown in fig. b in fig. 3 is set as a privacy area, and the area outside the dashed line frame is set as a non-privacy area.
In the case that whether a target object meeting a high-altitude parabolic condition exists in a video frame to be displayed or not can be determined currently, specified fuzzy processing can be performed on privacy areas which are in the video frame to be displayed, are except for a high-altitude parabolic track area and meet the privacy condition. And under the condition that whether a target object meeting a high-altitude parabolic condition exists in the video frame to be displayed or not cannot be determined currently, and the target object meeting the high-altitude parabolic condition does not exist in the video frame to be displayed, performing specified fuzzy processing on a privacy area in the video frame to be displayed, so that the privacy area is displayed in a shielded mode (namely the privacy area in the video frame to be displayed is filled with a shielded image, a displayed image of the area is different from a real image of the privacy area, and the displayed image of the privacy area does not expose privacy information in the privacy area), and a non-privacy area in the video frame to be displayed can be displayed in an unshielded mode, so that an original image of the video frame to be displayed in the non-privacy area is displayed. Here, the specific setting process of the privacy zone may refer to a setting process of the privacy zone in the related art, which is not described in detail herein.
For example, if the privacy area is set as a partial area in the video frame to be displayed as shown in fig. 3 b, if it cannot be currently determined whether a target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, and it is determined that a target object meeting a high-altitude parabolic condition does not exist in the video frame to be displayed, the video frame to be displayed in the embodiment is finally displayed according to fig. c as shown in fig. 4, where the area filled with the hatched lines is a privacy area for performing the designated blurring process, and the gray area is a non-privacy area for normal display.
In a case where it is determined that a target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, the video frame to be displayed in this embodiment is finally displayed according to a diagram d as shown in fig. 4, where a hatched area is a privacy area for performing specified blurring processing, a white area (including an image of the target object) in the hatched area is a high-altitude parabolic track area, and a gray area is a non-privacy area for normal display, so that when the high-altitude parabolic track area and the privacy area overlap with each other in the video frame to be displayed in fig. 4, but the high-altitude parabolic track area needs to be displayed, exposure to privacy in the privacy area is reduced as much as possible. It should be noted that, in this embodiment, the display modes of the high-altitude parabolic track area and the non-privacy area are the same, and here, the high-altitude parabolic track area and the non-privacy area are divided according to different colors only for the convenience of distinguishing the two areas.
Thus, the flow shown in fig. 1 is completed.
As can be seen from the flow shown in fig. 1, in the embodiment of the present application, when it is determined that a target object meeting a high altitude parabolic condition exists in a video frame to be displayed, a first position of the target object is determined from the video frame to be displayed, and then a high altitude parabolic trajectory region of the target object is determined in the video frame to be displayed according to the first position, the size of the target object, and a second position of the target object in each video frame before the acquired video frame to be displayed, so as to perform specified blurring processing on a privacy region which is in the video frame to be displayed, is other than the high altitude parabolic trajectory region, and meets a privacy condition, and display the privacy region. According to the method, the currently acquired video frame in the section of video which can be acquired currently or the already acquired video frame in the section of video can be displayed, and by the method, the exposure of the privacy of residents can be avoided no matter the currently acquired video frame is displayed in real time or the video frame acquired before playback.
The following describes a process of performing specified fuzzy processing and displaying on a privacy area which is in accordance with a privacy condition and is other than a high-altitude parabolic track area of the target object in a video frame to be displayed in the embodiment:
if the embodiment specifies that the blurring processing is mosaic processing, when displaying the video frame to be displayed, an overlapping area between the high-altitude parabolic track area and the preset whole privacy area is determined according to the position of the high-altitude parabolic track area and the preset whole privacy area, mosaic coding is performed on the privacy area excluding the overlapping area in the whole privacy area, and then the video frame to be displayed is displayed.
Or, firstly, mosaic coding may be performed on the preset whole privacy area, then an overlapping area of the high-altitude parabolic track area and the preset whole privacy area is determined according to the position of the high-altitude parabolic track area and the preset position of the whole privacy area, mosaic decoding is performed on the overlapping area, and then a video frame to be displayed is displayed.
If the embodiment specifies that the blurring processing is layer-covering processing, when displaying the video frame to be displayed, the covering layer may be first disposed on the layer of the video frame to be displayed (the covering layer at least includes a covering sub-image, the position of the covering sub-image in the covering layer is the same as the position of the privacy area meeting the privacy condition in the video frame to be displayed, the covering sub-image may be a solid-color image, the area other than the privacy area may be a transparent image, the privacy area cannot be seen through the covering sub-image, and the original image in the video frame to be displayed below the transparent image, which is the same as the position of the transparent image in the covering layer, can be seen through the transparent image), and then the overlapping area of the high-altitude parabolic track area and the preset whole privacy area is determined according to the position of the high-altitude parabolic track area and the preset position of the whole privacy area, and performing transparentizing treatment on the area of the overlapped area in the shielding sub-image (the overlapped area in the shielding layer becomes a transparent image after the transparentizing treatment), and then displaying the video frame to be displayed.
It should be noted that, when the specified blurring processing in this embodiment is mosaic processing, performing specified blurring processing on a privacy area that meets the privacy condition and is other than the high-altitude parabolic track area in the video frame to be displayed means performing mosaic encoding on the privacy area to fill the privacy area into a mask image.
In this embodiment, the target object may be recorded at a first position in the video frame to be displayed, the position data of the first position may be packed into a data frame, the video frame to be displayed and the data frame may be stored in the same code stream, so that when the code stream is decoded and played back to the video frame to be displayed, a spatial parabolic track area in the video frame to be displayed may be determined according to the position data parsed from the data frame corresponding to the video frame to be displayed and the position data parsed from the data frame corresponding to at least one played video frame before the video frame to be displayed, and when the video frame to be displayed is played, a privacy area that meets the privacy condition and is other than the spatial parabolic track area in the video frame to be displayed may be subjected to mosaic coding and displayed.
When the specified blurring processing is layer occlusion processing, performing specified blurring processing on a privacy area which is in accordance with privacy conditions and is except for the high-altitude parabolic track area in the video frame to be displayed means that an occlusion layer is added above the privacy area, and the privacy area in the video frame to be displayed is filled as an occlusion image through an occlusion sub-image in the occlusion layer.
In this embodiment, the occlusion layer and the video frame to be displayed used in the layer occlusion processing process may be respectively packaged into video frames, and the same timestamp may be added to the video frame corresponding to the occlusion layer and the video frame corresponding to the video frame to be displayed, and the position data of the first position may be packaged into a data frame, and the two video frames and the data frame may be stored in the same code stream, so that when the code stream is decoded and played back to the video frame to be displayed, the occlusion layer is displayed above the video frame to be displayed (the occlusion layer at least includes an occlusion sub-image whose position in the occlusion layer is the same as the position of the privacy area meeting the privacy condition in the video frame to be displayed), and according to the position data parsed from the data frame, the region corresponding to the high-altitude parabolic track region in the occlusion layer is subjected to the transparentization processing, so that when the video frame to be displayed is displayed, the shielding layer above the high-altitude parabolic track area is transparent, so that the high-altitude parabolic track area is displayed in a non-shielding mode, and the shielding layer above the privacy area except the high-altitude parabolic track area in the privacy area is a shielding sub-image (such as a pure-color image), so that the privacy area is displayed in a shielding mode.
The above processing manners are only some embodiments in the present application, and the present application is not limited to how to perform specified blurring processing on privacy areas, which are in accordance with privacy conditions and are other than the high-altitude parabolic track area, in the video frame to be displayed, and display the privacy areas.
The following explains the scheme provided by this embodiment by taking the processing procedure of each video frame in a video as an example:
for convenience of description, it is assumed that the video to be played next contains 5 frames of video frames in total, as shown in fig. 5 (a picture displayed by a video frame in fig. 5 is an original picture when the video frame is captured, where a white area is a high-altitude parabolic track area corresponding to a target object, and the high-altitude parabolic track area is not displayed differently from other areas in the original picture, and is only for convenience of distinguishing), the high-altitude parabolic track area is respectively marked as a first video frame, a second video frame, a third video frame, a fourth video frame and a fifth video frame from morning to evening according to the capture time, where the first video frame does not have a high-altitude parabola and the second video frame, the third video frame, the fourth video frame and the fifth video frame have a high-altitude parabola.
As an embodiment, if the video segment is a video segment previewed in real time, that is, when a first video frame is obtained, the second video frame, the third video frame, the fourth video frame, and the fifth video frame may not be completely collected or not completely obtained, when a first video frame (that is, the first video frame) of the video segment is obtained, each object (for example, building, sky, tree, and the like) included in the first video frame is detected and recorded through a depth learning target detection algorithm, and then a privacy area meeting privacy conditions in the first video frame is subjected to specified blurring processing and displayed.
Then, when the collected second video frame is obtained (high-altitude parabolas begin to appear in the second video frame), detecting each object (including the high-altitude parabolas) contained in the second video frame through a deep learning target detection algorithm, comparing the detection result with each object contained in the recorded first video frame, detecting that an object which does not exist in the first video frame appears in the second video frame, marking the object as a suspected object of the high-altitude parabolas, generating a corresponding id (identity) for the suspected object through a target tracking algorithm, recording the position of the suspected object in the second video frame through the id, and then carrying out appointed fuzzy processing and displaying on a privacy area which meets privacy conditions in the second video frame.
After the suspected object of the high-altitude parabola is determined to appear in the second video frame, if it is determined that whether the suspected object is the target object meeting the high-altitude parabola condition can be determined according to 3 positions of the suspected object in the high altitude, when the collected third video frame is obtained, each object contained in the third video frame is detected through a deep learning target detection algorithm, the detection result is compared with each object contained in the recorded second video frame, it can be detected that the same suspected object in the second video frame also exists in the third video frame, the position of the suspected object in the third video frame is recorded through the id of the suspected object, then it is detected whether the number of the recorded positions of the suspected object can be used for judging whether the suspected object is the target object meeting the high-altitude parabola condition, because the number of the recorded positions of the suspected object is 2, and if the number of the positions of the suspected object is less than the requirement 3, waiting for obtaining the next video frame (namely, the fourth video frame), and then carrying out specified fuzzy processing on the privacy area meeting the privacy condition in the third video frame and displaying.
When the collected fourth video frame is obtained, detecting each object contained in the fourth video frame through a deep learning target detection algorithm, comparing the detection result with each object contained in the recorded third video frame, it can be detected that the same suspected object in the third video frame also exists in the fourth video frame, the position of the suspected object in the third video frame is recorded by the id of the suspected object, then detecting whether the recorded position number of the suspected object can judge whether the suspected object is a target object meeting a high-altitude parabolic condition, since the number of positions of the suspected object recorded at this time is 3, which is equal to the above requirement 3 for determining whether the suspected object is the target object, the track, the moving speed, and the like of the suspected object can be determined according to the 3 positions to determine whether the suspected object is a target object meeting the high altitude parabolic condition.
Assuming that the suspected object is determined to be a target object meeting a high-altitude parabolic condition in the fourth video frame in this embodiment, recording the suspected object corresponding to the id as the target object, obtaining the recorded 3 positions and the size of the target object through the id, determining a high-altitude parabolic track area corresponding to the target object in the fourth video frame (the width of the high-altitude parabolic track area may be set to be N times the width of the target object, where N is greater than or equal to 1), and performing specified fuzzy processing on a privacy area meeting a privacy condition, except the high-altitude parabolic track area of the target object, in the fourth video frame and displaying the privacy area.
When the acquired fifth video frame is obtained, detecting each object contained in the fifth video frame through a deep learning target detection algorithm, comparing a detection result with each object contained in the recorded fourth video frame, detecting that the same target object in the fourth video frame also exists in the fifth video frame, recording the position of the target object in the fifth video frame through the id of the target object, obtaining the recorded 4 positions through the id of the target object to determine a high-altitude parabolic track area of the target object in the fifth video frame, and performing specified fuzzy processing on a privacy area which is in line with privacy conditions and is except the high-altitude parabolic track area of the target object in the fifth video frame and displaying the privacy area. Illustratively, the display process of the final video segment is shown in fig. 6.
As an embodiment, if the piece of video is a piece of already-acquired playback video, that is, a first video frame, a second video frame, a third video frame, a fourth video frame, and a fifth video frame in the playback video have all been acquired, and information related to a high altitude parabola is also obtained when the playback video is obtained (the information related to the high altitude parabola may include at least a video frame of the video to be displayed in the above embodiment and a data frame corresponding to the video frame to be displayed), and the information related to the high altitude parabola indicates that a high altitude parabola is included in the playback video, and location information of the high altitude parabola is included in second to fifth video frames in the playback video, when the first video frame is displayed, a privacy region meeting a privacy condition in the first video frame is subjected to specified blurring processing and displayed.
When the second video frame is displayed, it can be detected that the second video frame contains a high-altitude parabola, a high-altitude parabolic track area of the target object in the second video frame is determined according to the position of the high-altitude parabola in the second video frame, and a privacy area which is in the second video frame, is except the high-altitude parabolic track area of the target object and meets privacy conditions is subjected to specified fuzzy processing and displayed.
When the third video frame is displayed, it may be detected that the third video frame includes a high altitude parabola, a high altitude parabola track region of the target object in the third video frame is determined according to a position of the high altitude parabola in the third video frame and a position of the high altitude parabola in a second video frame which includes the same high altitude parabola before the third video frame, and a privacy region which is in the third video frame, is except the high altitude parabola track region of the target object and meets privacy conditions is subjected to specified fuzzy processing and displayed. The subsequent display of the fourth video frame and the fifth video frame may refer to the display method of the third video frame, and the display process of the playback video is finally as shown in fig. 7.
The above examples are merely for convenience of understanding, and the embodiments of the present application are not particularly limited.
The method provided by the embodiment of the application is described above. The following describes the apparatus provided in the embodiments of the present application:
referring to fig. 8, fig. 8 is a schematic structural diagram of a video frame processing apparatus according to an embodiment of the present disclosure, where the embodiment of the apparatus is applied to an electronic device, such as a video camera, an NVR, and the like. The device includes:
a video frame obtaining unit 801, configured to obtain a collected video frame to be displayed;
a position determining unit 802, configured to determine, when it is determined that a target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, a first position of the target object from the video frame to be displayed;
a high-altitude parabolic track area determining unit 803, configured to determine, according to the first position, the size of the target object, and a second position of the determined target object in each video frame before the acquired video frame to be displayed, a high-altitude parabolic track area corresponding to the target object in the video frame to be displayed; the high altitude parabolic track area at least comprises: the first position corresponds to a region in the video frame to be displayed, and the second position corresponds to a region in the video frame to be displayed;
and the video frame processing unit 804 is configured to, when the video frame to be displayed is displayed, perform specified fuzzy processing on a privacy area which is in the video frame to be displayed, is other than the high-altitude parabolic track area and meets privacy conditions, and display the privacy area.
Optionally, the determining, by the position determining unit 802, that a target object meeting a high-altitude parabolic condition exists in the video frame to be displayed includes:
checking whether a recorded target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, and if so, determining that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed;
if the suspected object of the high-altitude parabola recorded in the video frame to be displayed does not accord with the high-altitude parabola condition, whether the suspected object of the high-altitude parabola recorded in the video frame to be displayed accords with the high-altitude parabola condition is checked, and if the suspected object of the high-altitude parabola condition accords with the high-altitude parabola condition, the target object of the high-altitude parabola condition in the video frame to be displayed is determined to exist and recorded.
Optionally, in a case that it cannot be currently determined whether a target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, the video frame processing unit 804 is further configured to:
and when the video frame to be displayed is displayed, carrying out specified fuzzy processing on the privacy area meeting the privacy condition in the video frame to be displayed and displaying.
Optionally, the step of checking whether the suspected object of the high altitude parabola recorded in the video frame to be displayed meets the high altitude parabola condition by the position determining unit 802 includes:
and determining whether the suspected object is a target object meeting a high-altitude parabolic condition according to the position of the suspected object in the video frame to be displayed and the position of the same suspected object in at least one video frame obtained before the video frame to be displayed is obtained, and if the suspected object is determined to be the target object, determining that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed.
Optionally, the high altitude parabolic condition at least comprises: feature filter conditions, object filter conditions;
the feature filtering condition is used for filtering objects which exist in high altitude but do not accord with high altitude parabolic features;
the object filtering condition is used for filtering objects which exist in high altitude and conform to the characteristics of the high altitude parabola but belong to non-high altitude parabolas.
Optionally, the specifying the blurring process at least includes: mosaic processing, or layer occlusion processing.
Optionally, if the specified blurring processing is layer occlusion processing, the apparatus further includes a video frame storing unit, configured to store an occlusion layer used in the layer occlusion processing process, the video frame to be displayed, and the first position in a same code stream, where the occlusion layer and the video frame to be displayed have a same timestamp; the shielding layer at least comprises a shielding sub-image, and the position of the shielding sub-image in the shielding layer is the same as the position of the privacy area meeting the privacy conditions in the video frame to be displayed; and when the video frame to be displayed is displayed, the shielding layer is positioned above the video frame to be displayed.
Thus, the structure of the embodiment of the apparatus shown in FIG. 8 is completed.
Correspondingly, an embodiment of the present application further provides a hardware structure diagram of an electronic device, and specifically, as shown in fig. 9, the electronic device may be the device for implementing the video frame processing method. As shown in fig. 9, the hardware structure includes: a processor and a memory.
Wherein the memory is to store machine executable instructions;
the processor is used for reading and executing the machine executable instructions stored by the memory so as to realize the method embodiment of the corresponding video frame processing method.
For one embodiment, the memory may be any electronic, magnetic, optical, or other physical storage device that may contain or store information such as executable instructions, data, and the like. For example, the memory may be: volatile memory, non-volatile memory, or similar storage media. In particular, the Memory may be a RAM (random Access Memory), a flash Memory, a storage drive (e.g., a hard disk drive), a solid state disk, any type of storage disk (e.g., an optical disk, a DVD, etc.), or similar storage medium, or a combination thereof.
So far, the description of the electronic apparatus shown in fig. 9 is completed.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (10)
1. A video frame processing method is applied to an electronic device and comprises the following steps:
acquiring a collected video frame to be displayed;
under the condition that a target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, determining a first position of the target object from the video frame to be displayed;
determining a high-altitude parabolic track area corresponding to the target object in the video frame to be displayed according to the first position, the size of the target object and the determined second position of the target object in each video frame before the acquired video frame to be displayed; the high altitude parabolic track area at least comprises: the first position corresponds to a region in the video frame to be displayed, and the second position corresponds to a region in the video frame to be displayed;
and when the video frame to be displayed is displayed, carrying out specified fuzzy processing on privacy areas which are except the high-altitude parabolic track area and accord with privacy conditions in the video frame to be displayed, and displaying.
2. The method of claim 1, wherein the determining that a target object conforming to a high altitude parabolic condition exists in the video frame to be displayed comprises:
checking whether a recorded target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, and if so, determining that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed;
if the suspected object of the high-altitude parabola recorded in the video frame to be displayed does not accord with the high-altitude parabola condition, whether the suspected object of the high-altitude parabola recorded in the video frame to be displayed accords with the high-altitude parabola condition is checked, and if the suspected object of the high-altitude parabola condition accords with the high-altitude parabola condition, the target object of the high-altitude parabola condition in the video frame to be displayed is determined to exist and recorded.
3. The method of claim 1, wherein in a case that it cannot be currently determined whether a target object conforming to a high altitude parabolic condition exists in the video frame to be displayed, the method further comprises:
and when the video frame to be displayed is displayed, carrying out specified fuzzy processing on the privacy area meeting the privacy condition in the video frame to be displayed and displaying.
4. The method according to claim 2, wherein the checking whether the suspected object of the high altitude parabola recorded in the video frame to be displayed meets the high altitude parabola condition comprises:
and determining whether the suspected object is a target object meeting a high-altitude parabolic condition according to the position of the suspected object in the video frame to be displayed and the position of the same suspected object in at least one video frame obtained before the video frame to be displayed is obtained, and if the suspected object is determined to be the target object, determining that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed.
5. Method according to any one of claims 1 to 4, characterized in that said high altitude parabolic conditions comprise at least: feature filter conditions, object filter conditions;
the feature filtering condition is used for filtering objects which exist in high altitude but do not accord with high altitude parabolic features;
the object filtering condition is used for filtering objects which exist in high altitude and conform to the characteristics of the high altitude parabola but belong to non-high altitude parabolas.
6. The method according to any of claims 1 to 4, wherein the specified blurring process comprises at least: mosaic processing, or layer occlusion processing.
7. The method of claim 6, wherein if the specified blurring process is an overlay occlusion process, the method further comprises:
storing an occlusion layer used in the layer occlusion processing process, the video frame to be displayed and the first position in the same code stream, wherein the occlusion layer and the video frame to be displayed have the same timestamp; the shielding layer at least comprises a shielding sub-image, and the position of the shielding sub-image in the shielding layer is the same as the position of the privacy area meeting the privacy conditions in the video frame to be displayed;
and when the video frame to be displayed is displayed, the shielding layer is positioned above the video frame to be displayed.
8. A video frame processing apparatus applied to an electronic device, comprising:
the video frame obtaining unit is used for obtaining the collected video frame to be displayed;
the position determining unit is used for determining a first position of a target object from the video frame to be displayed under the condition that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed;
a high-altitude parabolic track area determination unit, configured to determine, according to the first position, the size of the target object, and a second position of the determined target object in each video frame before the acquired video frame to be displayed, a high-altitude parabolic track area corresponding to the target object in the video frame to be displayed; the high altitude parabolic track area at least comprises: the first position corresponds to a region in the video frame to be displayed, and the second position corresponds to a region in the video frame to be displayed;
and the video frame processing unit is used for carrying out specified fuzzy processing on privacy areas which are except the high-altitude parabolic track area and accord with privacy conditions in the video frame to be displayed and displaying the privacy areas when the video frame to be displayed is displayed.
9. The apparatus of claim 8, wherein the position determining unit determines that a target object meeting a high altitude parabolic condition exists in the video frame to be displayed comprises:
checking whether a recorded target object meeting a high-altitude parabolic condition exists in the video frame to be displayed, and if so, determining that the target object meeting the high-altitude parabolic condition exists in the video frame to be displayed;
if the suspected object of the high-altitude parabola recorded in the video frame to be displayed does not accord with the high-altitude parabola condition, whether the suspected object of the high-altitude parabola recorded in the video frame to be displayed accords with the high-altitude parabola condition is checked, and if the suspected object of the high-altitude parabola condition accords with the high-altitude parabola condition, the target object of the high-altitude parabola condition in the video frame to be displayed is determined to exist and recorded.
10. An electronic device, comprising: a processor and a memory;
the memory for storing machine executable instructions;
the processor is configured to read and execute the machine executable instructions stored by the memory to implement the method of any one of claims 1 to 7.
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