CN114845048A - Photographing method and system based on intelligent terminal - Google Patents
Photographing method and system based on intelligent terminal Download PDFInfo
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- CN114845048A CN114845048A CN202210354139.0A CN202210354139A CN114845048A CN 114845048 A CN114845048 A CN 114845048A CN 202210354139 A CN202210354139 A CN 202210354139A CN 114845048 A CN114845048 A CN 114845048A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/61—Control of cameras or camera modules based on recognised objects
- H04N23/611—Control of cameras or camera modules based on recognised objects where the recognised objects include parts of the human body
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/22—Image preprocessing by selection of a specific region containing or referencing a pattern; Locating or processing of specific regions to guide the detection or recognition
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/24—Aligning, centring, orientation detection or correction of the image
- G06V10/245—Aligning, centring, orientation detection or correction of the image by locating a pattern; Special marks for positioning
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
- G06V40/166—Detection; Localisation; Normalisation using acquisition arrangements
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
Abstract
The invention relates to the field of photographing, in particular to a method for prompting a user to perform head lifting, lowering, left turning and right turning operations by 1) acquiring a user image; 2) identifying a face region in the image obtained in the step 1), measuring maximum length and maximum width data of the face region in the whole process of lifting, lowering, turning left and turning right of the head of a user, and respectively extracting the maximum value of the maximum length data and the maximum width data as standard values of the length and the width of the face region; 3) setting the length and width threshold values of the face region during photographing according to the standard values of the length and the width of the face region; 4) prompting a user to take a picture, acquiring a user image, identifying a face region in the image, and measuring data of the maximum length and the maximum width of the face region; when the intelligent terminal-based photographing method provided by the invention is used for self-service photographing, whether the head of a user is correct or not can be identified, and when the head of the user is not correct, the user can be automatically prompted to adjust the head posture, so that the method is suitable for further popularization and application.
Description
Technical Field
The invention relates to the field of photographing, in particular to a photographing method and a photographing system based on an intelligent terminal.
Background
With the rapid development of society, the terminal machine has been gradually popularized, so that inconvenience caused by manual handling is avoided, and the handling speed of resident certificates is greatly improved. At present, the identity card terminal on the market integrates self-service photographing and self-service application, and self-service acceptance and self-service photographing of the second generation card can be realized.
The head of the user is required to be correct when the certificate photo is shot, whether the head posture of the user is correct or not cannot be identified when the identity card terminal takes a self-service photo, and when the head of the user is not correct when the user takes a self-service photo, a prompt suggestion for adjusting the head posture cannot be given like manual photo, so that the use of the user is inconvenient.
Disclosure of Invention
In order to solve the problems, the invention provides a photographing method based on an intelligent terminal.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a photographing method based on an intelligent terminal comprises the following steps:
1) acquiring a user image and prompting the user to carry out head lifting, lowering, left turning and right turning operations;
2) identifying a face region in the image obtained in the step 1), measuring maximum length and maximum width data of the face region in the whole process of lifting, lowering, turning left and turning right of the head of a user, and respectively extracting the maximum value of the maximum length data and the maximum width data as standard values of the length and the width of the face region;
3) Setting a length and width threshold value when the face area is photographed according to standard values of the length and width of the face area;
4) prompting a user to take a picture, acquiring a user image, identifying a face region in the image, and measuring data of the maximum length and the maximum width of the face region;
5) when the measured maximum length and maximum width data of the face area are both larger than the set length and width threshold values, prompting a user to keep the posture stable and taking a picture;
6) when the maximum length of the measured face area is smaller than a set length threshold, prompting a user to lift or lower the head;
when the maximum width of the measured face area is smaller than a set width threshold value, prompting a user to turn left or turn right the head;
and when the maximum length and the maximum width of the measured face area are both greater than the set length and width threshold values, prompting the user to keep the posture and taking a picture.
Preferably, the mode of prompting the user selects any one or more of voice prompt and text prompt.
Preferably, the length threshold value in the step 3) ranges from 92% to 96% of the length standard value; the width threshold value range is 92-96% of the width standard value.
Further, in step 6), when the maximum length of the detected face area is smaller than a set length threshold, prompting the user to lift or lower the head, specifically comprising the following steps:
When the measured maximum length of the face area is smaller than a set length threshold, prompting a user to rotate the head to the upper side or the lower side, and monitoring the change of the maximum length of the face area in the rotating process;
when the maximum length of the face area is gradually increased, prompting the user to continue rotating the head to the side direction until the measured maximum length of the face area is larger than a set length threshold;
when the maximum length of the face area is gradually reduced, prompting the head of the user to rotate in the opposite direction until the measured maximum length of the face area is larger than a set length threshold.
Further, in step 6), when the maximum width of the detected face region is smaller than a set width threshold, prompting the user to turn the head left or right, specifically including the steps of:
when the maximum width of the measured face region is smaller than a set width threshold value, firstly prompting a user to rotate the head to the left side or the right side, and monitoring the change of the maximum width of the face region in the rotating process;
when the maximum width of the face area is gradually increased, prompting the user to continue rotating the head to the side direction until the measured maximum width of the face area is larger than a set width threshold value;
when the maximum width of the face area is gradually reduced, prompting the head of the user to rotate towards the opposite direction until the measured maximum width of the face area is larger than the set width threshold value.
Further, in the step 6), the user compares the maximum length and the maximum width of the currently measured face region with the set length and width threshold values in real time in the processes of raising, lowering, turning left and turning right of the head according to the prompt, and feeds back the comparison result in real time.
Furthermore, the maximum length of the currently measured face area is larger than a length threshold value, and a user is prompted not to raise the head or lower the head; and when the maximum width of the measured face area is larger than the width threshold value, prompting the user not to turn the head left or right.
Based on the above photographing method based on the intelligent terminal, the present invention further provides a photographing system based on the intelligent terminal, comprising:
the camera module is used for shooting images;
the display module is used for shooting images, feeding back results and displaying user operation prompts;
the voice module is used for operating voice playing of the prompt;
and the control unit is loaded with the shooting method based on the intelligent terminal and is used for controlling the camera module to shoot under the condition of meeting a preset condition.
Compared with the prior art, the invention has the following beneficial effects:
when the self-service photographing method based on the intelligent terminal is used for self-service photographing, whether the head of a user is correct or not can be recognized, when the head of the user is not correct, the user can be automatically prompted to adjust the head posture, photographing is carried out when the head posture of the user to be used accords with photographing conditions, the use of the user is facilitated, and the method is suitable for further popularization and application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1, the present embodiment provides a photographing method based on an intelligent terminal, including:
1) and acquiring a user image and prompting the user to carry out head lifting, lowering, left turning and right turning operations.
2) And (2) acquiring a face area in the image in the identification step 1), measuring maximum length and maximum width data of the face area in the whole process of lifting, lowering, turning left and turning right of the head of a user, and respectively extracting the maximum value of the maximum length data and the maximum width data as standard values of the length and the width of the face area.
When the face is lifted or lowered, the maximum length of the face displayed in a plane form can be changed, namely when the face is over against the camera and the head is not lifted or lowered, the full end is right, the projection length of the face on the horizontal plane is the longest, and when the head is lifted or lowered, the projection length of the face on the horizontal plane can be shortened. Similarly, when the human face is right opposite to the camera, the head is completely right and left rotated, the projection width of the human face on the horizontal plane is widest, and when the head is left rotated or right rotated, the projection length of the human face on the horizontal plane can be narrowed. Wherein, the maximum width of the human face area can preferably detect the projection width of the two ends of the ears of the human face on the horizontal plane. The invention identifies whether the head posture of the user is correct or not by the mode.
3) Setting the length and width threshold values of the face region during photographing according to the standard values of the length and the width of the face region; wherein the length threshold value range is 92-96% of the length standard value; the width threshold value range is 92-96% of the width standard value; the threshold value is 92-96% of the standard value, and because the head posture of the user is difficult to be corrected in a hundred percent manner, certain deviation is allowed in the normal shooting process, and the shooting efficiency can be greatly improved under the condition of ensuring the shooting quality.
4) Prompting a user to take a picture, acquiring a user image, identifying a face region in the image, and measuring data of the maximum length and the maximum width of the face region;
5) when the measured maximum length and maximum width data of the face area are both larger than the set length and width threshold values, prompting a user to keep the posture stable and taking a picture;
6) when the maximum length of the measured face area is smaller than a set length threshold, prompting a user to lift or lower the head, and specifically comprising the following steps:
when the measured maximum length of the face area is smaller than a set length threshold, the head of the user is firstly prompted to rotate to the upper side or the lower side, namely, the user is prompted to rotate to the upper side or the lower side, and the change of the maximum length of the face area in the rotating process is detected.
When the head of a user rotates from the inclined side to the end front side, the maximum length data of the face area of the user is gradually increased, and the maximum length data of the face area is maximum when the head is completely aligned; when the head of the user continues to rotate towards the inclined side, the maximum length data of the face area of the user gradually becomes smaller.
When the maximum length of the face area is gradually increased, prompting the user to continue rotating the head to the side direction until the measured maximum length of the face area is larger than a set length threshold;
when the maximum length of the face area is gradually reduced, prompting the head of the user to rotate in the opposite direction until the measured maximum length of the face area is larger than a set length threshold. The maximum length of the currently measured face area is larger than a length threshold value, and a user is prompted not to raise the head or lower the head, namely, the head is kept not to move up and down.
When the maximum width of the measured face area is smaller than a set width threshold, prompting a user to turn left or turn right the head, and specifically comprising the following steps:
when the maximum width of the detected face area is smaller than the set width threshold, the head of the user is firstly prompted to rotate towards the left side or the right side, namely, the user is prompted to rotate towards the left side or the right side, and the change of the maximum width of the face area in the rotating process is detected.
Similarly, when the head of the user rotates from the inclined side to the end front side, the maximum width data of the face area of the user is gradually increased, and the maximum width data of the face area is maximum when the head of the user is completely aligned; when the head of the user continues to rotate towards the inclined side, the maximum width data of the face area of the user gradually becomes smaller.
When the maximum width of the face area is gradually increased, prompting the user to continue rotating the head to the side direction until the measured maximum width of the face area is larger than a set width threshold value;
when the maximum width of the face area is gradually reduced, prompting the head of the user to rotate towards the opposite direction until the measured maximum width of the face area is larger than the set width threshold value. And when the maximum width of the measured face area is larger than the width threshold value, prompting the user not to turn the head left or right.
And in the processes of raising, lowering, turning left and turning right the head of the user according to the prompt, comparing the maximum length and the maximum width of the currently measured face region with the set length and width threshold in real time, and feeding back the comparison result in real time, so that the user can conveniently adjust the head posture of the user in real time according to the real-time feedback result, and the accurate adjustment of the head posture of the user is facilitated.
Through the method, a prompt can be given to the user, and the user can turn the head to be correct according to the prompt.
And when the maximum length and the maximum width of the measured face area are both greater than the set length and width threshold values, prompting the user to keep the posture and taking a picture.
Wherein, the prompt mode can be any one or more of voice prompt and text prompt. As a further improvement, the method can also carry out image dynamic prompting, namely prompting the user in a dynamic video image mode, and can also carry out prompting in combination with a text mode, an image mode and a voice mode.
This embodiment still provides a system of shooing based on intelligent terminal, includes:
the camera module is used for shooting images;
the display module is used for shooting images, feeding back results and displaying user operation prompts;
the voice module is used for operating voice playing of the prompt;
and the control unit is loaded with the shooting method based on the intelligent terminal and is used for controlling the camera module to shoot under the condition of meeting the preset condition.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A photographing method based on an intelligent terminal is characterized by comprising the following steps:
1) acquiring a user image and prompting the user to carry out head lifting, lowering, left turning and right turning operations;
2) identifying a face region in the image obtained in the step 1), measuring maximum length and maximum width data of the face region in the whole process of lifting, lowering, turning left and turning right of the head of a user, and respectively extracting the maximum value of the maximum length data and the maximum width data as standard values of the length and the width of the face region;
3) setting the length and width threshold values of the face region during photographing according to the standard values of the length and the width of the face region;
4) prompting a user to take a picture, acquiring a user image, identifying a face area in the image, and measuring data of the maximum length and the maximum width of the face area;
5) when the measured maximum length and maximum width data of the face area are both larger than the set length and width threshold values, prompting a user to keep the posture stable and taking a picture;
6) when the maximum length of the measured face area is smaller than a set length threshold, prompting a user to lift or lower the head;
when the maximum width of the measured face area is smaller than a set width threshold value, prompting a user to turn left or turn right the head;
And when the maximum length and the maximum width of the measured face area are both greater than the set length and width threshold values, prompting the user to keep the posture and taking a picture.
2. The intelligent terminal-based photographing method according to claim 1, wherein the user is prompted by one or more of voice prompt and text prompt.
3. The intelligent terminal based photographing method according to claim 1, wherein the length threshold value in the step 3) ranges from 92% to 96% of the length standard value; the value range of the width threshold value is 92-96% of the width standard value.
4. The intelligent terminal-based photographing method according to claim 1, wherein in step 6), when the maximum length of the detected face area is smaller than a set length threshold, the user is prompted to lift or lower the head, and the specific steps are as follows:
when the measured maximum length of the face area is smaller than a set length threshold, prompting a user to rotate the head to the upper side or the lower side, and monitoring the change of the maximum length of the face area in the rotating process;
when the maximum length of the face area is gradually increased, prompting the user to continue rotating the head to the side direction until the measured maximum length of the face area is larger than a set length threshold;
When the maximum length of the face area is gradually reduced, prompting the head of the user to rotate in the opposite direction until the measured maximum length of the face area is larger than a set length threshold.
5. The intelligent terminal-based photographing method according to claim 4, wherein in step 6), when the maximum width of the detected face region is smaller than a set width threshold, the user is prompted to turn the head left or right, and the specific steps are as follows:
when the maximum width of the measured face region is smaller than a set width threshold value, firstly prompting a user to rotate the head to the left side or the right side, and monitoring the change of the maximum width of the face region in the rotating process;
when the maximum width of the face area is gradually increased, prompting the user to continue rotating the head towards the side direction until the measured maximum width of the face area is larger than a set width threshold value;
when the maximum width of the face area is gradually reduced, prompting the head of the user to rotate towards the opposite direction until the measured maximum width of the face area is larger than the set width threshold value.
6. The intelligent terminal-based photographing method according to claim 5, wherein in step 6), during the process of raising, lowering, turning left and turning right the head according to the prompt, the user compares the maximum length and the maximum width of the currently measured face region with the set length and width threshold in real time, and feeds back the comparison result in real time.
7. The intelligent terminal based photographing method according to claim 6, wherein the maximum length of the currently measured face area is greater than a length threshold value, prompting the user not to raise or lower the head; and when the maximum width of the measured face area is larger than the width threshold value, prompting the user not to turn the head left or right.
8. The utility model provides a system of shooing based on intelligent terminal which characterized in that includes:
the camera module is used for shooting images;
the display module is used for shooting images, feeding back results and displaying user operation prompts;
the voice module is used for operating voice playing of the prompt;
the control unit is loaded with the intelligent terminal-based photographing method of any one of claims 1 to 7 and is used for controlling the camera module to photograph under the condition that a preset condition is met.
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| CN202210354139.0A CN114845048B (en) | 2022-04-06 | 2022-04-06 | Photographing method and system based on intelligent terminal |
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| CN202210354139.0A CN114845048B (en) | 2022-04-06 | 2022-04-06 | Photographing method and system based on intelligent terminal |
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| Publication number | Publication date |
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| CN114845048B (en) | 2024-01-19 |
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