CN104702914A - Monitored video data processing method and system - Google Patents
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Abstract
The invention discloses a monitored video data processing method and system. The method includes the steps: S1, detecting background light and movement of a current image frame of a monitored video, and judging whether the current image frame has a background light change or a movement change; S2, not storing the current image frame if the current image frame does not have the background light change or the movement change; S3, storing the current image frame and marking timestamps of the current image frame if the current image frame has the background light change or the movement change; S4, determining the repeated playing frequency of the stored image frame according to the difference between adjacent timestamps of the stored image frame. High-definition quality of video data can be ensured, storage space needed by the video data can be maximally decreased, data storage use ratio is increased, and cost is reduced.
Description
Technical field
The present invention relates to technical field of video monitoring, be specifically related to a kind of data processing method and system of monitor video.
Background technology
Current, store in memory in high frequency multiplication mode after the video record data monitored adopt digitized processing usually, specifically, when video record, picture pick-up device carries out snapshots to view, and is preserved in order by the picture after taking pictures, and when displaying video time, carry out picture playing with identical speed, because naked eyes can produce continuity impact to fast scene switching, thus define final video image.
In 24 hours watch-dogs, said method usually can be adopted to preserve picture, but, because the video data volume is large, cause the memory space that needs are huge.Existing method, by compressing the quality of video data, then the video data after compression is stored again, but the quality of the video data that will store is compressed, can reduce the project effect of video data, thus existing method cannot balance the capacity of memory space and the problem of video frequency data quality.
Summary of the invention
Object of the present invention provides a kind of data processing method and system of monitor video, under the prerequisite ensureing video data high definition quality, can maximize and reduce memory space.
According to an aspect of the present invention, a kind of data processing method of monitor video is provided, comprises: step S1, background light and motion detection are carried out to the current image frame of monitor video, judge whether current image frame exists the change of background light or motion change; , if current image frame does not exist the change of background light, and also there is not motion change, then do not store current image frame in step S2; Step S3, if described current image frame exists the change of background light or motion change, then stores described current image frame, and marks the timestamp of described current image frame; Step S4, when playback monitor video, according to the difference of adjacent time stamp between the picture frame stored, determines the repeat playing number of times of each picture frame stored, forms the monitor video data of Continuous Play.
Wherein, in the present invention, described step S1 comprises: step S11, record previous image frame and current image frame; Step S12, contrasts current image frame and previous image frame, judges whether described current image frame exists the change of background light or motion change; Described background light change or motion change are the change exceeding predetermined threshold value.
Wherein, in the present invention, described step S3 comprises: step S31, if described current image frame exists the change of background light or motion change, then stores described current image frame; Step S32, marks the memory time of described current image frame.
Wherein, in the present invention, according to the difference of adjacent time stamp between the picture frame stored in described step S4, determine the repeat playing number of times of each picture frame stored, comprise: the difference of memory time obtaining the memory time of current image frame and next picture frame of storage stored, using the repeat playing number of times of the ratio of this difference and monitor video broadcasting speed as the current image frame stored.
According to a further aspect in the invention, a kind of data handling system of monitor video is provided, comprise: detecting unit, background light and motion detection are carried out to the current image frame of monitor video, judge whether current image frame exists the change of background light or motion change; Memory cell, is connected to described detecting unit, for detecting that at described detecting unit described current image frame does not exist the change of background light, and when also there is not motion change, does not store current image frame; When described detecting unit detects that described current image frame exists the change of background light or motion change, store this current image frame, and mark the timestamp of this current image frame; Playback unit, connects described memory cell, for when playback monitor video, according to the difference of adjacent time stamp between the picture frame stored, determines the repeat playing number of times of each picture frame stored, forms the monitor video data of Continuous Play.
Wherein, in the present invention, described detecting unit comprises: logging modle, for recording previous image frame and current image frame; Comparison module, is connected to described logging modle, for current image frame and described previous image frame being contrasted, judges whether described current image frame exists the change of background light or motion change.
Wherein, in the present invention, described memory cell comprises: sub module stored, for detecting that at described detecting unit described current image frame exists the change of background light or motion change, stores described current image frame; Mark module, for marking the memory time of described current image frame.
Wherein, in the present invention, described playback unit comprises: number of times determining unit, for obtaining the memory time of current image frame of storage and the difference of the memory time of next picture frame of storage of described mark module mark, using the repeat playing number of times of the ratio of this difference and monitor video broadcasting speed as the current image frame stored.
According to data processing method and the system of a kind of monitor video of the present invention, by carrying out background light and motion detection to the picture frame of monitor video, the picture frame that the change of background light or motion change occur is carried out storing and marks its memory time of stamp, when playback video, according to the difference of adjacent time stamp between the picture frame stored, determine the repeat playing number of times of each picture frame stored, form the monitor video data of Continuous Play, make the present invention can ensure the high definition quality of video data, the memory space reduced needed for video data can be maximized again, improve the utilization rate that data store, reduce cost.
Accompanying drawing explanation
Fig. 1 shows the flow chart of the data processing method of the monitor video of the preferred embodiment of the present invention;
Fig. 2 shows the sub-process figure of step S1 in Fig. 1;
Fig. 3 shows the sub-process figure of step S3 in Fig. 1;
Fig. 4 shows the structural representation of the data handling system of the monitor video of the preferred embodiment of the present invention;
Fig. 5 shows the structural representation of detecting unit in Fig. 4;
Fig. 6 shows the structural representation of memory cell in Fig. 4;
Fig. 7 shows the structural representation of playback unit in Fig. 4.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment also with reference to accompanying drawing, the present invention is described in more detail.Should be appreciated that, these describe just exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present invention.
As shown in Figure 1, the data processing method of the monitor video of the preferred embodiment of the present invention comprises:
Step S1, carries out background light and motion detection to the current image frame of monitor video, judges whether current image frame exists the change of background light or motion change.
The video data of monitoring is made up of the view data of a frame frame, watch-dog is usually according to the speed memory image of 15 frames per second, 30 frames or 50 frames, in step sl, background light and motion detection are carried out to the current image frame of monitoring, so that the picture frame that timely storage background light or motion state change.
Specifically, the sub-process of step S1 as shown in Figure 2, comprising:
Step S11, record previous image frame and current image frame.
Step S12, contrasts current image frame and previous image frame, judges whether described current image frame exists the change of background light or motion change.Particularly, a upper picture frame of current image frame and buffer memory is contrasted, judge whether to occur in the picture of current image frame the change of background light or whether occur motion change.
, if current image frame does not exist the change of background light, and also there is not motion change, then do not store current image frame in step S2.When there is not the change of background light in the picture judging current image frame, and also there is not motion change, showing that current image frame is identical with previous image frame, without the need to repeated storage, to reduce the memory space of data.
Step S3, if described current image frame exists the change of background light or motion change, then stores described current image frame, and marks the timestamp of described current image frame.
Specifically, the sub-process of step S3 as shown in Figure 3, comprising:
Step S31, if described current image frame exists the change of background light or motion change, then stores described current image frame.Particularly, when judging that current image frame exists the change of background light or motion change, showing that current image frame is different from previous image frame, then storing this current image frame.
Background light change/motion change is all determined by the data difference of picture frame and predetermined threshold value being compared, and the change exceeding predetermined threshold value is background light change/motion change.
Step S32, marks the memory time of described current image frame, after step S31 stores current image frame, marks the memory time of this current image frame.
Step S4, when playback monitor video, according to the difference of adjacent time stamp between the picture frame stored, determines the repeat playing number of times of each picture frame stored, forms the monitor video data of Continuous Play.
Specifically, obtain the difference of memory time of the memory time of current image frame and next picture frame of storage stored, using the repeat playing number of times of the ratio of this difference and monitor video broadcasting speed as the current image frame stored.The such as video recording equipment of shooting 15 frame per second, the speed of its displaying video is play a picture frame in every 1/15th seconds, when first picture frame and second picture frame difference n second, so the broadcasting time of first picture frame is n*15 time, and then play second picture frame, when playing second picture frame, in like manner contrast the difference of the memory time of second picture frame and the 3rd picture frame, suppose that the difference time is m, so just second picture frame is play m*15 time, by that analogy, the effect of Continuous Play can be obtained like this.
To in video data, each needs the picture frame stored to carry out timestamp mark in the present invention, and the current image frame of picture pick-up device monitor video and previous image frame are contrasted, judge that whether current image frame is identical with previous image frame, if not identical, preserve this current image frame, if the same do not preserve this current image frame.When playback video data, determine that each picture frame needs the number of times play according to the difference between timestamp, to obtain the effect of Continuous Play, adopt and this phase diagram picture frame only to be stored once, original for picture pick-up device 3 months data rewinds can be deleted once, become half data rollback in 1 year and delete once, make the present invention can ensure the high definition quality of video data, the memory space reduced needed for video data can be maximized again, improve the utilization rate that data store, reduce cost.
As shown in Figure 4, the data handling system of the monitor video of the preferred embodiment of the present invention comprises detecting unit 1, memory cell 2 and playback unit 3.
Detecting unit 1, for carrying out background light and motion detection to the current image frame of monitor video, judges whether current image frame exists the change of background light or motion change.
The video data of monitoring is made up of the view data of a frame frame, watch-dog is usually according to the speed memory image of 15 frames per second, 30 frames or 50 frames, the current image frame of detecting unit 1 to monitoring carries out background light and motion detection, so that the picture frame that timely storage background light or motion state change.
Specifically, the structure of detecting unit 1 as shown in Figure 5, comprises logging modle 11 and comparison module 12.
Logging modle 11 is for recording previous image frame and current image frame.
Comparison module 12 is connected to logging modle 11, for current image frame and previous image frame being contrasted, judges whether current image frame exists the change of background light or motion change.Particularly, the previous image frame of current image frame and buffer memory contrasts by comparison module 12, judges whether to occur in the picture of current image frame the change of background light or whether occurs motion change.
Memory cell 2 is connected to detecting unit 1, for detecting that at detecting unit 1 current image frame does not exist the change of background light, and when also there is not motion change, does not store current image frame; When detecting unit detects that current image frame exists the change of background light or motion change, store this current image frame, and mark the timestamp of this current image frame.
Specifically, the structure of memory cell 2 as shown in Figure 6, comprising: sub module stored 21 and mark module 22.
Sub module stored 21, for detecting that at detecting unit 1 current image frame exists the change of background light or motion change, stores this current image frame.Specifically, there is not the change of background light when detecting unit 1 detects in the picture of current image frame, and there is not motion change yet, show that current image frame is identical with previous image frame, without the need to repeated storage, to reduce the memory space of data; There is the change of background light or motion change when detecting unit 1 detects in the picture of current image frame, show that current image frame is different from previous image frame, then store this current image frame.Background light change/motion change is all determined by the data difference of picture frame and predetermined threshold value being compared, and the change exceeding predetermined threshold value is background light change/motion change.
Mark module 22 is for marking the memory time of current image frame, and it marks the memory time of this current image frame after sub module stored 21 stores current image frame.
Playback unit 3 connects memory cell 2, for when playback monitor video, according to the difference of adjacent time stamp between the picture frame stored, determines the repeat playing number of times of each picture frame stored, forms the monitor video data of Continuous Play.
Specifically, the structure of playback unit 3 comprises number of times determining unit 31 as shown in Figure 7.
Number of times determining unit 31 for memory time of current image frame of storage of obtaining mark module 22 and marking and the difference of the memory time of next picture frame of storage, using the repeat playing number of times of the ratio of this difference and monitor video broadcasting speed as the current image frame stored.The such as video recording equipment of shooting 15 frame per second, the speed of its displaying video is play a picture frame in every 1/15th seconds, when first picture frame and second picture frame difference n second, so the broadcasting time of first picture frame is n*15 time, and then play second picture frame, when playing second picture frame, in like manner contrast the difference of the memory time of second picture frame and the 3rd picture frame, suppose that the difference time is m, so just second picture frame is play m*15 time, by that analogy, the effect of Continuous Play can be obtained like this.
As mentioned above, according to data processing method and the system of a kind of monitor video of the present invention, by carrying out background light and motion detection to the picture frame of monitor video, the picture frame that the change of background light or motion change occur is carried out storing and marks its memory time of stamp, when playback video, according to the difference of adjacent time stamp between the picture frame stored, determine the repeat playing number of times of each picture frame stored, form the monitor video data of Continuous Play, make the present invention can ensure the high definition quality of video data, the memory space reduced needed for video data can be maximized again, improve the utilization rate that data store, reduce cost.
Should be understood that, above-mentioned embodiment of the present invention only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore, any amendment made when without departing from the spirit and scope of the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.In addition, claims of the present invention be intended to contain fall into claims scope and border or this scope and border equivalents in whole change and modification.
Claims (8)
1. a data processing method for monitor video, is characterized in that, comprising:
Step S1, carries out background light and motion detection to the current image frame of monitor video, judges whether current image frame exists the change of background light or motion change;
, if current image frame does not exist the change of background light, and also there is not motion change, then do not store current image frame in step S2;
Step S3, if described current image frame exists the change of background light or motion change, then stores described current image frame, and marks the timestamp of described current image frame;
Step S4, when playback monitor video, according to the difference of adjacent time stamp between the picture frame stored, determines the repeat playing number of times of each picture frame stored, forms the monitor video data of Continuous Play.
2. method according to claim 1, is characterized in that, described step S1 comprises:
Step S11, record previous image frame and current image frame;
Step S12, contrasts current image frame and previous image frame, judges whether described current image frame exists the change of background light or motion change;
Wherein, described background light change or motion change are the change exceeding predetermined threshold value.
3. method according to claim 1, is characterized in that, described step S3 comprises:
Step S31, if described current image frame exists the change of background light or motion change, then stores described current image frame;
Step S32, marks the memory time of described current image frame.
4. method according to claim 3, is characterized in that, according to the difference of adjacent time stamp between the picture frame stored in described step S4, determines the repeat playing number of times of each picture frame stored, comprising:
Obtain the difference of memory time of the memory time of current image frame and next picture frame of storage stored, using the repeat playing number of times of the ratio of this difference and monitor video broadcasting speed as the current image frame stored.
5. a data handling system for monitor video, is characterized in that, comprising:
Detecting unit (1), carries out background light and motion detection to the current image frame of monitor video, judges whether current image frame exists the change of background light or motion change;
Memory cell (2), be connected to described detecting unit (1), for detecting that at described detecting unit (1) described current image frame does not exist the change of background light, and when also there is not motion change, do not store current image frame; When described detecting unit (1) detects that described current image frame exists the change of background light or motion change, store this current image frame, and mark the timestamp of this current image frame;
Playback unit (3), connect described memory cell (2), for when playback monitor video, according to the difference of adjacent time stamp between the picture frame stored, determine the repeat playing number of times of each picture frame stored, form the monitor video data of Continuous Play.
6. system according to claim 5, is characterized in that, described detecting unit (1) comprising:
Logging modle (11), for recording previous image frame and current image frame;
Comparison module (12), is connected to described logging modle (11), for current image frame and described previous image frame being contrasted, judges whether described current image frame exists the change of background light or motion change.
7. system according to claim 5, is characterized in that, described memory cell (2) comprising:
Sub module stored (21), for detecting that at described detecting unit (1) described current image frame exists the change of background light or motion change, stores described current image frame;
Mark module (22), for marking the memory time of described current image frame.
8. system according to claim 7, is characterized in that, described playback unit (3) comprising:
Number of times determining unit (31), for the difference of the memory time of memory time of current image frame and next picture frame of storage of obtaining the storage that described mark module (22) marks, using the repeat playing number of times of the ratio of this difference and monitor video broadcasting speed as the current image frame stored.
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