CN106791425B - Prompting system and method for prompting user of optimal imaging distance and mobile phone - Google Patents
Prompting system and method for prompting user of optimal imaging distance and mobile phone Download PDFInfo
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- CN106791425B CN106791425B CN201710003374.2A CN201710003374A CN106791425B CN 106791425 B CN106791425 B CN 106791425B CN 201710003374 A CN201710003374 A CN 201710003374A CN 106791425 B CN106791425 B CN 106791425B
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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
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
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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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Abstract
The invention provides a prompt system for prompting a user of an optimal imaging distance, which comprises: the distance acquisition module is used for calculating and acquiring a first distance between human eyes and the camera through convex lens imaging and sending the first distance to the judgment module for judgment; the judging module is used for calculating a difference value between the first distance and the target distance according to the first distance and sending the difference value to the prompting module; and the prompting module is used for planning a path according to the difference value and prompting a user to move to an optimal position according to the planned path. A prompting method for prompting an optimal imaging distance of a user comprises the steps of calculating and obtaining a first distance between human eyes and a camera through convex lens imaging; calculating a difference value between the first distance and the target distance according to the first distance; and planning a path according to the distance difference, and prompting the user to move to the optimal position according to the planned path. The invention also provides a mobile phone. Compared with the prior art, the method and the device enable the user to know how far the optimal position still needs to be moved, and improve the photographing efficiency.
Description
Technical Field
The invention relates to the field of image measurement, in particular to a device capable of prompting a user of an optimal imaging distance and a using method.
Background
Many mobile communication equipment or intelligent bracelet all have eyeball identification function now. For a mobile phone with eyeball identification, when a user picks up the mobile phone and aligns to a front camera, the mobile phone is often not in the best imaging position, so that the imaging quality is poor, and the user experience is influenced. At this time, the user does not know the optimal imaging distance, that is, even if the imaging is not good, the user does not know which direction the front camera of the mobile phone should be moved, and how much distance the front camera of the mobile phone needs to be moved to obtain the optimal imaging distance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a prompting system and method for prompting a user of an optimal imaging distance, and a mobile phone, so that the user can be prompted of the optimal imaging distance, and the image quality is improved.
The invention provides a prompt system for prompting a user of an optimal imaging distance, which comprises:
the distance acquisition module is used for calculating and acquiring a first distance between human eyes and the camera through convex lens imaging and sending the first distance to the judgment module for judgment;
the judging module is used for calculating a difference value between the first distance and the target distance according to the first distance and sending the difference value to the prompting module;
and the prompting module is used for planning a path according to the difference value and prompting a user to move to an optimal position according to the planned path.
Further, the step of calculating and acquiring the first distance between the human eyes and the camera by the distance acquisition module comprises the following steps:
step S01, calculating an included angle formed by a light ray penetrating through the center of the lens of the camera at the edge of the human eye and a horizontal line;
step two S02, calculating the distance between the human eyes and the lens as u;
step three S03, calculating the distance between the sensor of the camera and the lens as v, and the original size of the human eyes as Sorig, and then calculating the first distance u2 between the human eyes and the camera as:
u2＝v*tan(angle)＝v*(Sorig/u)＝Sorig*v/s2
where u2 is the actual distance, Sorig is the original size of the human eye, s2 is the size of the image of the human eye at the first distance, and v is the distance from the sensor to the lens.
Further, the judging module is implemented by adopting the following method according to the difference value between the first distance and the target distance:
according to a first distance u2 between the human eyes and the camera, calculating the distance (u1-u2) that the mobile phone camera needs to move, wherein the formula is as follows:
Sorig*v/s2＝(s1*u1/v)*v/s2＝u1*s1/s2
u1-u2＝Sorig*v/s1-Sorig*v/s2
wherein u1 is a target distance, u2 is a first distance between human eyes and a camera, Sorig is an original size of the human eyes, s1 is an imaging size of the human eyes at the target distance, s2 is the imaging size of the human eyes at the first distance, and v is a distance from a sensor to a lens.
Further, the optimal position obtained by the prompt module is calculated by adopting the following formula:
u1*(1–s1/s2)。
the invention also provides a prompting method for prompting the optimal imaging distance of the user, which comprises the following steps:
calculating and acquiring a first distance between human eyes and a camera through convex lens imaging;
calculating a difference value between the first distance and the target distance according to the first distance;
and planning a path according to the distance difference, and prompting the user to move to the optimal position according to the planned path.
Further, the calculating and acquiring the first distance between the human eyes and the camera comprises the following steps:
step S01, calculating an included angle formed by a light ray penetrating through the center of the lens of the camera at the edge of the human eye and a horizontal line;
step two S02, calculating the distance between the human eyes and the lens as u;
step three S03, calculating the distance between the sensor of the camera and the lens as v, and the original size of the human eyes as Sorig, and then calculating the first distance u2 between the human eyes and the camera as:
u2＝v*tan(angle)＝v*(Sorig/u)＝Sorig*v/s2
wherein u2 is a first distance between a human eye and a camera, Sorig is an original size of the human eye, s2 is an imaging size of the human eye at the first distance, and v is a distance from a sensor to a lens.
Further, the judging module is implemented by adopting the following method according to the difference value between the first distance and the target distance:
according to a first distance u2 between the human eyes and the camera, calculating the distance (u1-u2) that the mobile phone camera needs to move, wherein the formula is as follows:
Sorig*v/s2＝(s1*u1/v)*v/s2＝u1*s1/s2
u1-u2＝Sorig*v/s1-Sorig*v/s2
wherein u1 is a target distance, u2 is a first distance between human eyes and a camera, Sorig is an original size of the human eyes, s1 is an imaging size of the human eyes at the target distance, s2 is the imaging size of the human eyes at the first distance, and v is a distance from a sensor to a lens.
Further, the optimal position obtained by the prompt module is calculated by adopting the following formula:
u1*(1–s1/s2)。
the invention also provides a mobile phone which comprises the prompt system for prompting the user of the optimal imaging distance.
Compared with the prior art, the method and the device have the advantages that the convex lens imaging calculation obtains the first distance between the human eyes and the camera and calculates the difference value between the first distance and the target distance, so that the optimal position is obtained, a user can know how far the optimal position needs to be moved, and the photographing efficiency is improved.
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FIG. 1 is a schematic diagram of a method of use of the present invention;
FIG. 2 is a block diagram of the reminder system of the present invention;
FIG. 3 is a flow chart of a hinting method of the present invention;
fig. 4 is a flowchart of acquiring a first distance between a human eye and a camera according to the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, these embodiments are provided to explain the principles of the invention and its practical application to thereby enable others skilled in the art to understand the invention for various embodiments and with various modifications as are suited to the particular use contemplated.
As shown in fig. 1, the imaging principle of the convex lens is known, and in the case that the image distance and the focal length are fixed, the difference of the object distance causes the imaging size to change correspondingly. As shown in the following figures, the same size object is at the position of u1 and u2, and the sizes imaged on the Sensor are s1 and s2, respectively.
If the included angle formed by the light rays of the edge of the object penetrating through the center of the lens and the horizontal line is angle, the distance from the object to the lens is u, the distance from the Sensor to the lens is v, and the original size of the object is Sorig, the calculation formula of the imaging size Simg is as follows:
Simg＝v*tan(angle)＝v*(Sorig/u)＝Sorig*v/u
since the front cameras are all fixed-focus modules, that is, the focal lengths are fixed, and the image distances are not changed once adjusted, the value of the target distance can be calculated by the above formula, assuming that the optimal object distance at which the eyes of the image are located is u1 in fig. 1, that is, the target distance, that is, the imaging size is s1, and when u1 is fixed, s1 is also a fixed value because the size of the eyes is a fixed value.
As shown in fig. 2, a prompt system for prompting a user of an optimal imaging distance according to the present invention includes:
the distance acquisition module is used for calculating and acquiring a first distance between human eyes and the camera through convex lens imaging and sending the first distance to the judgment module for judgment;
the judging module is used for calculating a difference value between the first distance and the target distance according to the first distance and sending the difference value to the prompting module;
and the prompting module is used for planning a path according to the difference value and prompting a user to move to an optimal position according to the planned path. As shown in fig. 1 and 4, the calculating and acquiring a first distance between a human eye and a camera by the distance acquiring module includes the following steps:
step S01, calculating an included angle formed by a light ray penetrating through the center of the lens of the camera at the edge of the human eye and a horizontal line;
step two S02, calculating the distance between the human eyes and the lens as u;
step three S03, calculating the distance between the sensor of the camera and the lens as v, and the original size of the human eyes as Sorig, and then calculating the first distance u2 between the human eyes and the camera as:
u2＝v*tan(angle)＝v*(Sorig/u)＝Sorig*v/s2
wherein u2 is a first distance between a human eye and a camera, Sorig is an original size of the human eye, s2 is an imaging size of the human eye at the first distance, and v is a distance from a sensor to a lens.
The judgment module is realized by adopting the following method according to the difference value between the first distance and the target distance:
according to a first distance u2 between the human eyes and the camera, calculating the distance (u1-u2) that the mobile phone camera needs to move, wherein the formula is as follows:
Sorig*v/s2＝(s1*u1/v)*v/s2＝u1*s1/s2
u1-u2＝Sorig*v/s1-Sorig*v/s2
wherein u1 is a target distance, u2 is a first distance between human eyes and a camera, Sorig is an original size of the human eyes, s1 is an imaging size of the human eyes at the target distance, s2 is the imaging size of the human eyes at the first distance, and v is a distance from a sensor to a lens.
The optimal position obtained by the prompt module is calculated by adopting the following formula:
u1*(1–s1/s2)。
as shown in fig. 3, a prompting method for prompting a user of an optimal imaging distance is characterized in that: the method comprises the following steps:
calculating and acquiring a first distance between human eyes and a camera through convex lens imaging;
calculating a difference value between the first distance and the target distance according to the first distance;
and planning a path according to the distance difference, and prompting the user to move to the optimal position according to the planned path.
As shown in fig. 1 and 4, the calculating and acquiring the first distance between the human eye and the camera includes the following steps:
step S01, calculating an included angle formed by a light ray penetrating through the center of the lens of the camera at the edge of the human eye and a horizontal line;
step two S02, calculating the distance between the human eyes and the lens as u;
step three S03, calculating the distance between the sensor of the camera and the lens as v, and the original size of the human eyes as Sorig, and then calculating the first distance u2 between the human eyes and the camera as:
u2＝v*tan(angle)＝v*(Sorig/u)＝Sorig*v/s2
wherein u2 is a first distance between a human eye and a camera, Sorig is an original size of the human eye, s2 is an imaging size of the human eye at the first distance, and v is a distance from a sensor to a lens.
The judgment module is realized by adopting the following method according to the difference value between the first distance and the target distance:
according to a first distance u2 between the human eyes and the camera, calculating the distance (u1-u2) that the mobile phone camera needs to move, wherein the formula is as follows:
Sorig*v/s2＝(s1*u1/v)*v/s2＝u1*s1/s2
u1-u2＝Sorig*v/s1-Sorig*v/s2
wherein u1 is a target distance, u2 is a first distance between human eyes and a camera, Sorig is an original size of the human eyes, s1 is an imaging size of the human eyes at the target distance, s2 is the imaging size of the human eyes at the first distance, and v is a distance from a sensor to a lens.
The optimal position obtained by the prompt module is calculated by adopting the following formula:
u1*(1–s1/s2)。
the method of the present invention is described below in conjunction with a system;
the distance judgment module obtains a first distance between human eyes and the camera through convex lens imaging calculation and sends the iang first distance to the judgment module;
the judging module calculates a difference value between the first distance and the target distance according to the first distance and sends the difference value to the prompting module;
and the prompting module is used for planning a path according to the difference value and prompting the user to move to the optimal position according to the planned path.
The prompt module prompts through a prompt box in a display screen of the mobile terminal.
The invention also provides a mobile phone which comprises the prompt system for prompting the user of the optimal imaging distance, and the description is omitted here.
While the invention has been shown and described with reference to certain embodiments, those skilled in the art will understand that: various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (3)
1. A prompt system for prompting a user for an optimal imaging distance, comprising: this reminder system includes:
the distance acquisition module is used for calculating and acquiring a first distance between human eyes and the camera through convex lens imaging and sending the first distance to the judgment module for judgment;
the judging module is used for calculating a difference value between the first distance and the target distance according to the first distance and sending the difference value to the prompting module;
a prompting module for planning the path according to the difference value, prompting the user to move to the optimal position according to the planned path,
the distance acquisition module calculates and acquires a first distance between human eyes and the camera, and comprises the following steps: step S01, calculating an included angle formed by a light ray penetrating through the center of the lens of the camera at the edge of the human eye and a horizontal line; step two S02, calculating the distance between the human eyes and the lens as u; step three S03, calculating the distance between the sensor of the camera and the lens as v, and the original size of the human eyes as Sorig, and then calculating the first distance u2 between the human eyes and the camera as: u2 (v tan) (angle) v (Sorig/u) (Sorig v/s 2), where u2 is the first distance between the human eye and the camera, Sorig is the original size of the human eye, s2 is the size of the image of the human eye at the first distance, v is the distance from the sensor to the lens,
the judgment module is realized by adopting the following method according to the difference value between the first distance and the target distance: according to a first distance u2 between the human eyes and the camera, calculating the distance (u1-u2) that the mobile phone camera needs to move, wherein the formula is as follows: sorig × v/s2 (s1 × u1/v) × v/s2 (u1 × s1/s2), u1-u2 (Sorig × v/s1-Sorig × v/s2, where u1 is the target distance, u2 is the first distance between the human eye and the camera, Sorig is the original size of the human eye, s1 is the size of the image of the human eye at the target distance, s2 is the size of the image of the human eye at the first distance, v is the distance from the sensor to the lens,
the optimal position obtained by the prompt module is calculated by adopting the following formula: u1 (1-s 1/s 2).
2. A prompting method for prompting a user of an optimal imaging distance is characterized by comprising the following steps: the method comprises the following steps:
calculating and acquiring a first distance between human eyes and a camera through convex lens imaging;
calculating a difference value between the first distance and the target distance according to the first distance;
planning a path according to the distance difference, prompting a user to move a lens to an optimal position according to the planned path,
the step of calculating and acquiring the first distance between the human eyes and the camera comprises the following steps: step S01, calculating an included angle formed by a light ray penetrating through the center of the lens of the camera at the edge of the human eye and a horizontal line; step two S02, calculating the distance between the human eyes and the lens as u; step three S03, calculating the distance between the sensor of the camera and the lens as v, and the original size of the human eyes as Sorig, and then calculating the first distance u2 between the human eyes and the camera as: u2 (v tan) (angle) v (Sorig/u) (Sorig v/s 2), where u2 is the first distance between the human eye and the camera, Sorig is the original size of the human eye, s2 is the size of the image of the human eye at the first distance, v is the distance from the sensor to the lens,
the judgment module is realized by adopting the following method according to the difference value between the first distance and the target distance: according to a first distance u2 between the human eyes and the camera, calculating the distance (u1-u2) that the mobile phone camera needs to move, wherein the formula is as follows: sorig × v/s2 (s1 × u1/v) × v/s2 (u1 × s1/s2), u1-u2 (Sorig × v/s1-Sorig × v/s2, where u1 is the target distance, u2 is the first distance between the human eye and the camera, Sorig is the original size of the human eye, s1 is the size of the image of the human eye at the target distance, s2 is the size of the image of the human eye at the first distance, v is the distance from the sensor to the lens,
the optimal position obtained by the prompt module is calculated by adopting the following formula: u1 (1-s 1/s 2).
3. A mobile phone, characterized in that: a prompting system including the system of claim 1 for prompting a user for an optimal imaging distance.
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| CN104506773A (en) * | 2014-12-22 | 2015-04-08 | 天津市亚安科技股份有限公司 | Camera automatic zoom control method based on human eye distance |
| CN105554384A (en) * | 2015-12-17 | 2016-05-04 | 上海青橙实业有限公司 | Wearable apparatus and shooting method |
| CN105787435A (en) * | 2016-02-03 | 2016-07-20 | 北京天诚盛业科技有限公司 | Indication method and apparatus for iris acquisition |
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| CN104506773A (en) * | 2014-12-22 | 2015-04-08 | 天津市亚安科技股份有限公司 | Camera automatic zoom control method based on human eye distance |
| CN105554384A (en) * | 2015-12-17 | 2016-05-04 | 上海青橙实业有限公司 | Wearable apparatus and shooting method |
| CN105787435A (en) * | 2016-02-03 | 2016-07-20 | 北京天诚盛业科技有限公司 | Indication method and apparatus for iris acquisition |
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