CN106488128B - Automatic photographing method and device - Google Patents

Automatic photographing method and device Download PDF

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Publication number
CN106488128B
CN106488128B CN201610956772.1A CN201610956772A CN106488128B CN 106488128 B CN106488128 B CN 106488128B CN 201610956772 A CN201610956772 A CN 201610956772A CN 106488128 B CN106488128 B CN 106488128B
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Prior art keywords
photographing
area
attention area
attention
change
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CN106488128A (en
Inventor
焦松
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Chengdu Ck Technology Co ltd
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Chengdu Ck Technology Co ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/222Studio circuitry; Studio devices; Studio equipment ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
    • H04N5/225Television cameras ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, camcorders, webcams, camera modules specially adapted for being embedded in other devices, e.g. mobile phones, computers or vehicles
    • H04N5/232Devices for controlling television cameras, e.g. remote control ; Control of cameras comprising an electronic image sensor
    • H04N5/23216Control of parameters, e.g. field or angle of view of camera via graphical user interface, e.g. touchscreen
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/222Studio circuitry; Studio devices; Studio equipment ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
    • H04N5/225Television cameras ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, camcorders, webcams, camera modules specially adapted for being embedded in other devices, e.g. mobile phones, computers or vehicles
    • H04N5/232Devices for controlling television cameras, e.g. remote control ; Control of cameras comprising an electronic image sensor
    • H04N5/23293Electronic viewfinders

Abstract

The invention discloses a method and a device for automatically photographing, wherein the method comprises the following steps: entering a scene tracking photographing mode; setting a focus area of a viewing interface; and when the image change in the attention area reaches a first preset condition, automatically photographing. The invention sets the attention area of a photographing device, automatically photographs according to the content change of the attention area and carries out automatic continuous photographing recording.

Description

Automatic photographing method and device
Technical Field
The invention relates to an automatic photographing method and device.
Background
With the progress of scientific technology and the popularization of intelligent devices and cameras, more and more people use them to capture beautiful scenes in life, take photos and videos, and share in social platforms.
However, in some scenarios, such as capturing document contents played in a meeting, a user of a camera or an intelligent device needs to manually perform a capturing action according to a page turning action of the played document; the information can be recorded in the whole course by using the video recording mode, so that the situation that a user continuously shoots by paying attention to the page turning action is avoided, but the recorded video is very considerable in size, and key information is not convenient to browse and search. Similar situations also occur when the scene content changes infrequently, but the photographing record needs to be performed when the scene content changes, such as scenery, animal photographing.
Meanwhile, because the sizes of the shot pictures of different intelligent devices and cameras are different (for example, the sizes of the shot pictures of a mobile phone and a panoramic camera are different), the sizes of the contents which need to be paid attention to are also different, for example, when the document contents played in a shooting conference are shot, only the content change of the document in the shot picture is interested, but other content changes in the shot picture are not interested, and the shooting is only carried out when the document changes, but the prior art does not limit the change.
Specifically, for example:
the invention patent with application number CN201410404932.2 discloses a method and a device for automatically taking a picture according to the change speed of the picture, which are applied to intelligent photographic equipment with the function of analyzing preview picture data, the change speed of the preview picture is detected by a camera, focusing and taking operations are automatically triggered according to the change speed, a scene which is vanished in the short term is accurately and quickly grasped, and the user experience is improved. The invention discloses an intelligent photographing device, which is used for acquiring preview picture data information, processing the preview picture data information according to the change of the preview picture data information, and enabling the intelligent photographing device to enter an automatic simple focusing and automatic photographing mode if the value T of the change speed of the preview picture data information is larger than a preset threshold value T0. However, the invention patent cannot independently select the change of a certain part in the picture, that is, the picture can be photographed and stored even when the part which is not concerned by the user changes, which is inconvenient for the user to browse and search the required information.
The invention patent with the application number of CN201410604474.7 discloses a snapshot method, a snapshot device, and a terminal, which collect two frames of images, compare differences between pixel points of the two frames of images at the same coordinate position based on the same coordinate system, determine whether a preset condition is met according to a comparison result, and automatically store the next frame of image of the two frames of images as a snapshot if the preset condition is met. According to the technical scheme, manual operation of a user is not needed, delay is avoided, focusing time is saved, snapshot is automatically triggered based on the change of a shot object, and accurate automatic snapshot is achieved. However, the patent of the invention can not locate, judge and photograph a certain interested part in the whole photographed picture.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an automatic photographing method and device, which are used for setting a camera attention area and automatically and continuously photographing and recording according to the content change of the attention area, and solve the problems that the prior art cannot select the attention area in a picture, so that a photo obtained by automatic photographing is non-critical data, and further the user is inconvenient to browse and search required information.
The purpose of the invention is realized by the following technical scheme:
a method of automatically taking a photograph, comprising:
entering a scene tracking photographing mode;
setting a focus area of a viewing interface;
and when the image change in the attention area reaches a first preset condition, automatically photographing.
The setting of the focus area of the viewing interface comprises the following steps:
receiving a touch event, and generating a photographing region according to the touch event;
or receiving a key-in event, and generating a photographing region through the key-in event.
When the image change in the attention area reaches a first preset condition, the method comprises the following steps:
the variation amplitude of the image content of the attention area exceeds a first threshold value;
or the rate of change of the image content of the region of interest exceeds a second threshold.
And when the image change in the attention area reaches a second preset condition, finishing photographing.
When the image change in the attention area reaches a second preset condition, the method comprises the following steps:
within a preset time, the variation amplitude of the image content of the attention area does not exceed a third threshold;
or within a preset time, the change rate of the image content of the attention area does not exceed the fourth threshold.
An apparatus for automatically taking a picture, comprising:
a photographing mode entering unit: the device is used for the photographing device to enter a scene tracking photographing mode;
a region-of-interest setting unit: the attention area is used for setting a viewing interface;
a first preset condition judgment unit: the method comprises the steps of judging whether image change in a region of interest reaches a first preset condition or not;
an automatic photographing unit: the method is used for automatically taking pictures when the image change in the attention area reaches a first preset condition.
The region of interest setting unit includes:
a receiving unit: for receiving a touch event or typing an event;
a generation unit: the shooting device is used for generating a shooting area according to the touch event or the key-in event received by the receiving unit.
The first preset condition judgment unit includes:
the first change amplitude judging unit is used for judging whether the change amplitude of the image content of the attention area exceeds a first threshold value or not;
or a first change rate judging unit for judging whether the change rate of the image content of the attention area exceeds a second threshold.
The device further comprises:
a second preset condition judgment unit: the method comprises the steps of judging whether image change in a region of interest reaches a first preset condition or not;
and a photographing ending unit: and the shooting is finished when the image change in the attention area reaches a second preset condition.
The second preset condition judgment unit includes:
the second change amplitude judging unit is used for judging whether the change amplitude of the image content of the attention area exceeds a third threshold value within the preset time;
or the second change rate judging unit is used for judging whether the change rate of the image content of the attention area exceeds a fourth threshold value within the preset time.
The invention has the beneficial effects that: the invention sets the attention area of the photographing device, automatically photographs according to the content change of the attention area and carries out automatic continuous photographing recording.
Drawings
FIG. 1 is a flow chart of a method of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further described in detail by combining the attached drawings:
embodiment 1 is to photograph the contents of a document (PPT, etc.) played in a conference, as shown in fig. 1.
First, the user fixes the viewfinder lens of the photographing device so that a document picture appears in the viewfinder interface of the viewfinder lens. In this embodiment, the photographing apparatus may be a touch screen device or a non-touch screen device.
Secondly, the user controls the photographing device to enter a scene tracking photographing mode.
Then, setting the attention area of the viewing interface:
when the photographing device is a touch screen device, after the photographing device enters a scene tracking photographing mode, a framing interface is displayed on a display screen of the photographing device, a user touches the framing interface to select a desired photographing area, and at the moment, the photographing device directly records a touch track of a photographer on the framing interface, wherein the touch track is the photographing area selected by the photographer; or the user draws a line segment on the touch screen, the photographing device determines a rectangular area by taking the line segment as a rectangular diagonal line, and the rectangular area is the determined photographing area; or the photographing device determines a circular area by taking the line segment drawn by the user as the radius and the starting point as the center of a circle, and the circular area is the determined photographing area.
When the photographing device is a non-touch screen device, the photographing region can be determined by a screen division selection method, wherein the screen division selection method comprises the following steps: the screen on the photographing device is divided into a series of regions on average, for example, the screen can be divided into 16 rectangular regions of 4 by 4, and the regions are numbered, and the user can enter the number of the selected region through the input terminal of the photographing device to determine the photographing region.
In this embodiment, the play document of the whole conference needs to be included in the attention area, and the less the other parts in the attention area, the better:
further, the determination of the region of interest may be automatically corrected by the photographing apparatus: when the user selects a rough first attention area, the photographing device calculates and judges the color and brightness value of each pixel point in the first attention area, and when the first attention area is judged to have a frame shape (in this embodiment, a display screen or a projection frame for playing a document) in the first attention area, the photographing device reminds the user whether to perform automatic correction or not and displays the result of the second attention area obtained by automatic correction to the user. And if the user determines that the range is the range which needs attention of the user, taking the second attention area as the attention area of the user.
Meanwhile, the user can set a plurality of attention areas in the viewing interface. For example, when a conference playing document plays different contents through a plurality of display screens, and the plurality of display screens have a distance, one attention area is directly used for setting so that most of the contents which are not attended by the user appear in the attention area, and therefore the plurality of attention areas can be set.
Then, entering automatic photographing: and when the image change in the attention area reaches a first preset condition, automatically photographing.
In this embodiment, the image change in the attention area reaching the first preset condition includes that the change amplitude of the image content of the following two attention areas exceeds a first threshold; or the rate of change of the image content of the region of interest exceeds a second threshold.
Wherein, the calculation of the variation amplitude comprises the following steps:
and S1, collecting (or sampling and collecting) pixel points in the attention area, wherein the number of the sampling points can be reasonably set according to the information processing performance of the photographing device.
S2, the photographing device temporarily stores the color and brightness of each sampled pixel point in an image representation mode with specified specification and records the color and brightness as an Array1, so that the color and brightness of all sampled pixel points can be represented by an Array containing N elements.
And S3, after the interval of the specified time interval A milliseconds, the photographing device collects the attention area once again according to the step S2, records the color and the brightness value of the same N fixed pixel points and records the color and the brightness value as an Array2, wherein the specified time interval A is preset.
S4, calculating the absolute value of the difference of each corresponding element in the arrays 1 and 2, calculating and storing the SUM of the absolute values of the N differences, recording the SUM as SUM, and dividing the SUM by the SUM N of all the elements of the arrays to obtain the change amplitude of the picture before and after the specified time interval A milliseconds.
In addition, the rate of change is calculated as the magnitude of the change divided by the time interval.
The user selects whether to judge the change amplitude or the change rate according to the requirement: when the change is large (such as document shooting of the embodiment), the judgment of the change amplitude is selected; when the variation is small (such as sunrise/cloud shot in example 2), the variation rate judgment is selected.
Therefore, in the present embodiment, the variation width judgment is selected.
And after the played document is turned over, the change amplitude in the attention area is larger than a first threshold value, and the photographing device automatically performs photographing processing on the attention area.
Finally, in order to avoid the situation that the user forgets to turn off the photographing device, the embodiment further includes a step of automatically ending the photographing: and when the image change in the attention area reaches a second preset condition, finishing photographing. Wherein the image change in the region of interest reaches a second preset condition, including: within a preset time, the variation amplitude of the image content of the attention area does not exceed a third threshold; or within a preset time, the change rate of the image content of the attention area does not exceed the fourth threshold.
Example 2 is a shooting sunrise/cloud shot.
First, a user fixes a viewfinder lens of a photographing device, so that a sky picture appears in a viewfinder interface of the viewfinder lens. In this embodiment, the photographing apparatus is a panoramic photographing apparatus.
Secondly, the user controls the photographing device to enter a scene tracking photographing mode.
Then, setting the attention area of the viewing interface:
in this embodiment, the whole sky needs to be included in the region of interest, and the fewer other parts in the region of interest, the better:
firstly, when a user selects a rough first focus area, namely the upper half part in the whole viewing interface; then, the photographing device performs automatic correction: the photographing device calculates and judges the color and brightness value of each pixel point in the first attention area, and when the first attention area is judged to have up-down segmentation (in the embodiment, the upper sky and other pictures at the lower part, and other pictures include buildings, trees and the like), the photographing device reminds a user whether to perform automatic correction or not and displays the result of the second attention area obtained by automatic correction to the user. And if the user determines that the range is the range which needs attention of the user, taking the second attention area as the attention area of the user.
Meanwhile, a user can set a plurality of levels of attention area units in the same attention area, and different attention areas have different thresholds. For example, in this embodiment, a user first sets the whole sky as a maximum attention area, and then sets multiple cloud areas or sun areas in the attention area as attention area units of different levels, where a threshold of the sun area is smaller than a threshold of the cloud area, and a threshold of the cloud area is smaller than a threshold of the remaining area.
Then, entering automatic photographing: and when the image change in the attention area reaches a first preset condition, automatically photographing.
In this embodiment, the image change in the attention area reaching the first preset condition includes that the change amplitude of the image content of the following two attention areas exceeds a first threshold; or the rate of change of the image content of the region of interest exceeds a second threshold.
The calculation of the variation width and the calculation of the variation rate are already described in embodiment 1, and are not described herein again.
The user selects whether to judge the change amplitude or the change rate according to the requirement: when the change is large (such as document shooting of embodiment 1), the judgment of the change amplitude is selected; when the variation is small (such as sunrise/cloud shooting in the present embodiment), the variation rate judgment is selected.
Therefore, in the present embodiment, the change rate judgment is selected.
When the cloud moves/deforms or the position of the sun moves, the change rate in the attention area is larger than a first threshold value, and the photographing device automatically performs photographing processing on the cloud.
Based on the implementation process of the method, an embodiment of the present invention provides an automatic photographing apparatus, as shown in fig. 2, including:
a photographing mode entering unit: the device is used for the photographing device to enter a scene tracking photographing mode;
a region-of-interest setting unit: the attention area is used for setting a viewing interface;
a first preset condition judgment unit: the method comprises the steps of judging whether image change in a region of interest reaches a first preset condition or not;
an automatic photographing unit: the method is used for automatically taking pictures when the image change in the attention area reaches a first preset condition.
According to the photographing device provided by the embodiment, the interested part is determined in the view interface to be used as the attention area, and when the image change in the attention area reaches the preset value, photographing is carried out, so that the photographing data is the data which is interested by the user, and unnecessary data storage is reduced.
Optionally, in this embodiment, the attention area setting unit includes:
a receiving unit: for receiving a touch event or typing an event;
a generation unit: the shooting device is used for generating a shooting area according to the touch event or the key-in event received by the receiving unit.
The corresponding photographing device is a touch screen device or a non-touch screen device.
Optionally, in this embodiment, the first preset condition determining unit includes:
the first change amplitude judging unit is used for judging whether the change amplitude of the image content of the attention area exceeds a first threshold value or not;
or a first change rate judging unit for judging whether the change rate of the image content of the attention area exceeds a second threshold.
Optionally, in this embodiment, the apparatus further includes:
a second preset condition judgment unit: the method comprises the steps of judging whether image change in a region of interest reaches a first preset condition or not;
and a photographing ending unit: and the shooting is finished when the image change in the attention area reaches a second preset condition.
Optionally, in this embodiment, the second preset condition determining unit includes:
the second change amplitude judging unit is used for judging whether the change amplitude of the image content of the attention area exceeds a third threshold value within the preset time;
or the second change rate judging unit is used for judging whether the change rate of the image content of the attention area exceeds a fourth threshold value within the preset time.
In all the above embodiments, the photographing apparatus is composed of a camera or a smartphone and an application installed thereon.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims (8)

1. An automatic photographing method is characterized in that: the method comprises the following steps:
entering a scene tracking photographing mode;
setting a focus area of a viewing interface;
when the image change in the attention area reaches a first preset condition, automatically taking a picture;
the setting of the focus area of the viewing interface comprises the following steps:
receiving a touch event, and generating a photographing region according to the touch event;
or receiving a key-in event, and generating a photographing area through the key-in event;
the touch event comprises:
the method comprises the steps that a photographing device records a touch track on a view finding interface, wherein the touch track is a photographing area selected by a photographer;
the method comprises the steps that a photographing device records a line segment drawn on a touch screen, and a rectangular area is determined to be used as a photographing area by taking the line segment as a diagonal line;
the photographing device records the drawn line segment as a radius, and determines a circular area as a photographing area by taking the starting point as a circle center;
the keying event is to divide the screen into a plurality of rectangular areas and number each area, and a user can determine a photographing area by keying the number of the selection area through the input end of the photographing device;
the region of interest, comprising:
a first region of interest, which is a rough region selected by a user through a touch event and a key-in event;
the photographing device calculates and judges the color and brightness value of each pixel point in the first attention area, when the first attention area is judged to have a frame shape, shadow obstacle or up-down segmentation phenomenon, the photographing device reminds a user whether to perform automatic correction or not and displays a second attention area obtained by automatic correction to the user, and if the user determines that the second attention area is an area needing attention, the second attention area is used as the attention area of the user;
the number of the focusing areas of the set viewing interface can be one or more;
and a plurality of levels of attention area units are arranged in the same attention area, and different attention areas have different thresholds.
2. The method of claim 1, wherein the method comprises: when the image change in the attention area reaches a first preset condition, the method comprises the following steps:
the variation amplitude of the image content of the attention area exceeds a first threshold value;
or the rate of change of the image content of the region of interest exceeds a second threshold.
3. The method of claim 1, wherein the method comprises: the method further comprises the step of ending the scene tracking photographing mode when the image change in the region of interest reaches a second preset condition.
4. The method of claim 3, wherein the method comprises: when the image change in the attention area reaches a second preset condition, the method comprises the following steps:
within a preset time, the variation amplitude of the image content of the attention area does not exceed a third threshold;
or within a preset time, the change rate of the image content of the attention area does not exceed the fourth threshold.
5. The utility model provides an automatic device of shooing which characterized in that: the method comprises the following steps:
a photographing mode entering unit: the device is used for the photographing device to enter a scene tracking photographing mode;
a region-of-interest setting unit: the attention area is used for setting a viewing interface;
a first preset condition judgment unit: the method comprises the steps of judging whether image change in a region of interest reaches a first preset condition or not;
an automatic photographing unit: the method comprises the steps of automatically taking a picture when the image change in a region of interest reaches a first preset condition;
the attention area setting unit, which implements the attention area setting, includes:
receiving a touch event, and generating a photographing region according to the touch event;
or receiving a key-in event, and generating a photographing area through the key-in event;
the touch event comprises:
the method comprises the steps that a photographing device records a touch track on a view finding interface, wherein the touch track is a photographing area selected by a photographer;
the method comprises the steps that a photographing device records a line segment drawn on a touch screen, and a rectangular area is determined to be used as a photographing area by taking the line segment as a diagonal line;
the photographing device records the drawn line segment as a radius, and determines a circular area as a photographing area by taking the starting point as a circle center;
the keying event is to divide the screen into a plurality of rectangular areas and number each area, and a user can determine a photographing area by keying the number of the selection area through the input end of the photographing device;
the region of interest setting unit sets a region of interest including:
a first region of interest, which is a rough region selected by a user through a touch event and a key-in event;
the photographing device calculates and judges the color and brightness value of each pixel point in the first attention area, when the first attention area is judged to have a frame shape, shadow obstacle or up-down segmentation phenomenon, the photographing device reminds a user whether to perform automatic correction or not and displays a second attention area obtained by automatic correction to the user, and if the user determines that the second attention area is an area needing attention, the second attention area is used as the attention area of the user;
the attention area setting unit is used for setting the number of the attention areas of the viewing interface to be one or more;
and a plurality of levels of attention area units are arranged in the same attention area, and different attention areas have different thresholds.
6. The automatic photographing device according to claim 5, wherein: the first preset condition judgment unit includes:
the first change amplitude judging unit is used for judging whether the change amplitude of the image content of the attention area exceeds a first threshold value or not;
or a first change rate judging unit for judging whether the change rate of the image content of the attention area exceeds a second threshold.
7. The automatic photographing device according to claim 5, wherein: the device further comprises:
a second preset condition judgment unit: the image change judging module is used for judging whether the image change in the attention area reaches a second preset condition or not;
and a photographing ending unit: and ending the scene tracking photographing mode when the image change in the attention area reaches a second preset condition.
8. The automatic photographing device according to claim 7, wherein: the second preset condition judgment unit includes:
the second change amplitude judging unit is used for judging whether the change amplitude of the image content of the attention area exceeds a third threshold value within the preset time;
or the second change rate judging unit is used for judging whether the change rate of the image content of the attention area exceeds a fourth threshold value within the preset time.
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