CN103685940A - Method for recognizing shot photos by facial expressions - Google Patents
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Abstract
A method for recognizing shot photos by facial expressions is used for shooting of photos or videos of mobile equipment. A main camera acquires an object or a scene required to be shot; an auxiliary camera acquires complete face information of a photographer and image information; whether the facial expression, which is captured by the auxiliary camera, of the photographer or the image information of an action of the photographer is matched with a preset condition or not is judged; and if the facial expression, which is captured by the auxiliary camera, of the photographer or the image information of the action of the photographer is matched with the preset condition, a shooting shutter procedure is triggered, and a photo is shot. By using the method, the shooting means of the mobile equipment is flexible; when the photographer inconveniently touches a shuttle key, a photo can be shot by a simple facial expression or a simple action of the photographer; and moreover, a shutter triggering method is in a non-contact mode, and the possibility of blurring of photos due to manual shaking is greatly reduced.
Description
Technical field
The present invention relates to a kind of method of taking pictures by Expression Recognition.
Background technology
At present people are more and more higher to the demand of taking, universal along with intelligentized mobile device particularly, and people wish to accomplish whenever and wherever possible, take pictures flexibly and easily or video segment.Yet current most image pickup method is all contact, such as machinery and electronic shutter, be all physical button, when photographer uses, need to stablize mobile device on the one hand, need on the other hand to press shutter, be not suitable for very much one-handed performance, lack flexibility.Along with smart mobile phone development, the button of taking pictures is replaced by shutter icon on screen, but owing to there is no sense of touch, often occurs the situation of pressing wrong position.And contact inevitably causes equipment shake during mobile device, more or less can cause the fuzzy pictures of shooting.
Existing and Expression Recognition trigger the relevant patent of taking pictures China's disclosed smiling face tracking system in 2009 and method (application number: 200710203477.X), this patent is a kind of smiling face's method for tracing, by the lens shooting picture of camera model; Convert the picture of above-mentioned shooting to black and white picture; Read the brightness value of each point on described black and white picture; By the head portrait figure in the elementary contour intercepting picture of above-mentioned brightness value and face, and intercept lip figure in the head portrait figure of above-mentioned intercepting; The similarity of lip figure when people's face that the lip figure of more above-mentioned intercepting and camera model are preserved is smiled, draws the value of a percentage, and the value of described percentage is as the value of similarity; Whether the value that judges described similarity is greater than the value that camera model is set; When the value of described similarity is greater than the value of camera model setting, the picture of shooting is saved in the storage medium of camera model.
The function that smiling face tracking system and method have triggering shutter to take pictures, but say exactly, this method is not the shooting means that photographer initiatively triggers, it is personage that application scenarios only has subject, and just can automatically trigger shutter in the situation of smiling.If when there is no personage smiling face in the picture that needs to take, photographer still need to initiatively trigger shutter shooting by physical button and touch button.
Therefore, be badly in need of providing a kind of contactless method of taking pictures flexibly.
Summary of the invention
A kind of method of taking pictures by Expression Recognition provided by the invention, the method that triggers shutter is contactless, has improved the flexibility of taking, accuracy has reduced the possibility of photographic fog.
In order to achieve the above object, the invention provides a kind of method of taking pictures by Expression Recognition, the method is for mobile device, hardware based on mobile device is realized, described hardware comprises main control module, circuit connects the main camera of this main control module, auxiliary camera, digital signal processor DSP, internal storage and display screen, and the method includes the steps of:
Step 1, mobile device enter photographing program, and main control module judges in internal storage whether stored the image information of facial expression or action, if had, carry out step 2, if do not had, carry out step 1.1;
Whether step 1.1, main control module reminding user will input expression or motion images information, if user selects input expression or motion images information, main control module is controlled auxiliary camera and is caught photographer's expression or the image information of action, then for triggering the Rule of judgment of shutter below, if user does not select input expression or motion images information, the follow-up image processing algorithm that relies on completely when judging whether to trigger shutter, finally jumps to step 2;
Step 2, enter into preview mode, main control module is controlled object or the scene that main camera collection need to be taken, after processing through digital signal processor DSP, showing screen display, simultaneously, main control module is controlled auxiliary camera and is also started to gather image information, processes the face contour information of catching by digital signal processor DSP;
The auxiliary camera collection of step 3, main control module judgement to image information whether comprise the facial information that photographer is complete, if photographer is not in the face of auxiliary camera, main control module should be reminded the current state of photographer by display screen, and jump to step 1, reenter shooting flow process next time, continue capturing facial information;
Step 4, digital signal processor DSP start the complete facial image information of photographer to calculate and analyze;
Step 5, main control module judge the result of calculation of step 4, if the condition of the view data of catching and user preset is coincide, carry out step 6 so, if condition misfits, main control module is reminded the current state of photographer by display screen, and jump to step 1, reenter shooting flow process next time, continue capturing facial information;
Step 6, main control module trigger the shutter flow process of taking, and set suitable acquisition parameters, complete auto-focus process, control main camera and take pictures, by photo storage in the middle of internal storage.
It is pre-conditioned that step 7, main control module judge whether photographer's facial expression or action still meet, if met, jumps to step 6, realizes continuous shoot function, if do not met, jumps to step 8;
Step 8, photographing program are got back to preview mode, and jump to step 1, reenter shooting flow process next time, continue capturing facial information, wait for next time and taking.
In described step 4, longitudinally, digital signal processor DSP is processed respectively each frame image information obtaining, the change procedure of records photographing person facial expression or action, transversely, the image information obtaining and the expression or the action message comparison that are pre-stored in photographer in internal storage for digital signal processor DSP; If user does not use pre-stored image information, digital signal processor DSP is only done vertical analysis so.
Described mobile device is smart mobile phone, or digital camera.
The invention has the advantages that:
1, the present invention has realized and a kind ofly by Expression Recognition, has triggered the method that shutter is taken, and usings photographer's facial expression or action as trigger condition, uses more flexibly, has interest.
2, the present invention has key data acquisition module (main camera) and auxiliary data acquisition module (auxiliary camera), and auxiliary data acquisition module does not rely on subject and scene, continuously photographer's facial expression or action is caught.
3, the present invention is a kind of shutter trigger means of non-touch, avoids contact to cause mobile device shake, reduces the possibility of photographic fog.
Accompanying drawing explanation
Fig. 1 is hardware configuration schematic diagram of the present invention.
Fig. 2 is flow chart of the present invention.
Embodiment
Following according to Fig. 1 and Fig. 2, illustrate preferred embodiment of the present invention.
The invention provides a kind of method of taking pictures by Expression Recognition, the method can be used on mobile device.
Described mobile device can be smart mobile phone, digital camera, but be not limited to these mobile devices.
The hardware the present invention is based on mobile device is realized, as shown in Figure 1, these hardware comprise main control module 101, circuit connects the main camera 102 of this main control module 101, auxiliary camera 103, digital signal processor DSP 104, internal storage 105 and display screen 106.
Described main control module 101 can adopt the micro-chip processor of the frameworks such as arm, MIPS, completes monitoring and the control of whole shooting flow process.
Described main camera 102 and auxiliary camera 103 are data input devices, main camera 102 is used for gathering subject or scene, select as required suitable specification, auxiliary camera 103 is used for catching expression and the action of photographer's face, so select the larger camera in visual angle, to intactly obtain photographer's facial zone, and frame per second is enough large, can obtain the face action that photographer is complete like this.
The view data that described 104 pairs of main control modules 101 of digital signal processor DSP obtain by camera is processed, and between this digital signal processor DSP 104 and main control module 101, by internal bus, communicates.
View data comprises two parts, a part is the subject of main camera 102 acquisitions and the view data of scene, this part is that photographer intends to record, so process white balance algorithm in digital signal processor DSP 104, exposure algorithm, focus algorithm scheduling algorithm is processed automatically, the truest, be shown to high-quality on display screen 106, give photographer's preview; Another part is photographer's facial expression or the view data of action that auxiliary camera 103 obtains; this part is intended for the Rule of judgment that triggers shutter; therefore do not need to be shown on display screen 106; digital signal processor DSP 104 mainly calculates the profile information of view data, judgement photographer eyes, face; portion's bit positions such as eyebrow; whether do not stopping to obtain in the process of photographer's face image data, calculating the corners of the mouth and kick up, it is first-class whether photographer puts.
The invention provides a kind of method of taking pictures by Expression Recognition, the method includes the steps of:
Step 1, mobile device enter photographing program, and main control module 101 judges in internal storage 105 whether stored the image information of facial expression or action, if had, carry out step 2, if do not had, carry out step 1.1;
Everyone express one's feelings action varied, store in advance photographer's expression information, such as smile, nod, frown etc. and can improve the accuracy of judgement, such as, photographer selects the Rule of judgment of smiling as triggering shutter, program can be preserved the profile information at each position of photographer face, photographer's Skin Color Information, shape and the amplitude of photographer from strictly moving to the corners of the mouth this process of smiling;
Whether step 1.1, main control module 101 reminding users will input expression or motion images information, if user selects input expression or motion images information, main control module 101 is controlled auxiliary camera 103 and is caught photographer's expression or the image information of action, then for triggering the Rule of judgment of shutter below, if user does not select input expression or motion images information, the follow-up image processing algorithm that relies on completely when judging whether to trigger shutter, finally jumps to step 2;
Step 2, enter into preview mode, main control module 101 is controlled main camera 102 and is gathered object or the scene that needs shooting, after processing through digital signal processor DSP 104, on display screen 106, show, simultaneously, main control module 101 is controlled auxiliary camera 103 and is also started to gather image information, by digital signal processor DSP 104, processes the face contour information of catching;
Whether the image information that step 3, the auxiliary camera 103 of main control module 101 judgement collect comprises the facial information that photographer is complete, if photographer is not in the face of auxiliary camera 103, main control module 101 should be reminded the current state of photographer by display screen 106, and jump to step 1, reenter shooting flow process next time, continue capturing facial information;
Step 4, digital signal processor DSP 104 start the complete facial image information of photographer to calculate and analyze;
Photographer is in the process of preview, and auxiliary camera keeps the seizure to photographer's facial expression or action, during picture in photographer wishes to take preview instantly, only need to make default facial expression or action;
Longitudinally, digital signal processor DSP 104 is processed respectively each frame image information obtaining, the change procedure of records photographing person facial expression or action, transversely, the image information that digital signal processor DSP 104 use obtain and the expression or the action message comparison that are pre-stored in 105 li of photographers of internal storage;
If user does not use pre-stored image information, 104 of digital signal processor DSPs are done vertical analysis so;
The result of calculation of step 5,101 pairs of steps 4 of main control module judges, if the condition of the view data of catching and user preset is coincide, carry out step 6 so, if condition misfits, main control module 101 is reminded the current state of photographer by display screen 106, and jump to step 1, reenter shooting flow process next time, continue capturing facial information;
Step 6, main control module 101 triggers the shutter flow process of taking, and sets suitable acquisition parameters, completes auto-focus process, control main camera 103 and take pictures, by photo storage in the middle of internal storage 105.
It is pre-conditioned that step 7, main control module 101 judge whether photographer's facial expression or action still meet, if met, jumps to step 6, realizes continuous shoot function, if do not met, jumps to step 8;
Step 8, photographing program are got back to preview mode, and jump to step 1, reenter shooting flow process next time, continue capturing facial information, wait for next time and taking.
The present invention is mainly used in mobile device photo or video capture, photographer's facial expression that the auxiliary camera of judgement captures or the image information of action and pre-conditioned whether coincideing, if condition meets, trigger the shutter flow process of taking, complete photograph taking, the present invention makes the shooting means of mobile device more flexible, when photographer is inconvenient to touch tripper, only need a simple facial expression or action just can photograph photo, on the other hand, the method of triggering shutter of the present invention is contactless, greatly reduce the chance that artificial shake causes photographic fog.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Those skilled in the art, read after foregoing, for multiple modification of the present invention with to substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (3)
1. a method of taking pictures by Expression Recognition, the method is for mobile device, hardware based on mobile device is realized, and described hardware comprises main control module (101), circuit connects the main camera (102) of this main control module (101), auxiliary camera (103), digital signal processor DSP (104), internal storage (105) and display screen (106);
It is characterized in that, the method includes the steps of:
Step 1, mobile device enter photographing program, and main control module (101) judges in internal storage (105) whether stored the image information of facial expression or action, if had, carry out step 2, if do not had, carry out step 1.1;
Whether step 1.1, main control module (101) reminding user will input expression or motion images information, if user selects input expression or motion images information, main control module (101) is controlled auxiliary camera (103) and is caught photographer's expression or the image information of action, then for triggering the Rule of judgment of shutter below, if user does not select input expression or motion images information, the follow-up image processing algorithm that relies on completely when judging whether to trigger shutter, finally jumps to step 2;
Step 2, enter into preview mode, main control module (101) is controlled main camera (102) collection needs object or the scene of taking, after processing through digital signal processor DSP (104), in the upper demonstration of display screen (106), simultaneously, main control module (101) is controlled auxiliary camera (103) and is also started to gather image information, processes the face contour information of catching by digital signal processor DSP (104);
Whether the image information that step 3, the auxiliary camera (103) of main control module (101) judgement collect comprises the facial information that photographer is complete, if photographer is not in the face of auxiliary camera (103), main control module (101) should pass through display screen (106) and remind the current state of photographer, and jump to step 1, reenter shooting flow process next time, continue capturing facial information;
Step 4, digital signal processor DSP (104) start the complete facial image information of photographer to calculate and analyze;
Step 5, main control module (101) judge the result of calculation of step 4, if the condition of the view data of catching and user preset is coincide, carry out step 6 so, if condition misfits, main control module (101) is reminded the current state of photographer by display screen (106), and jump to step 1, reenter shooting flow process next time, continue capturing facial information;
Step 6, main control module (101) trigger the shutter flow process of taking, and set suitable acquisition parameters, complete auto-focus process, control main camera (103) and take pictures, by photo storage in the middle of internal storage (105);
It is pre-conditioned that step 7, main control module (101) judge whether photographer's facial expression or action still meet, if met, jumps to step 6, realizes continuous shoot function, if do not met, jumps to step 8;
Step 8, photographing program are got back to preview mode, and jump to step 1, reenter shooting flow process next time, continue capturing facial information, wait for next time and taking.
2. method of taking pictures by Expression Recognition as claimed in claim 1, it is characterized in that, in described step 4, longitudinally, digital signal processor DSP (104) is processed respectively each frame image information obtaining, the change procedure of records photographing person facial expression or action, transversely, the image information obtaining and the expression or the action message comparison that are pre-stored in the inner photographer of internal storage (105) for digital signal processor DSP (104); If user does not use pre-stored image information, digital signal processor DSP (104) is only done vertical analysis so.
3. method of taking pictures by Expression Recognition as claimed in claim 1, is characterized in that, described mobile device is smart mobile phone, or digital camera.
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