CN104811603A - Auxiliary focusing device and auxiliary focusing method - Google Patents
Auxiliary focusing device and auxiliary focusing method Download PDFInfo
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- CN104811603A CN104811603A CN201410037022.5A CN201410037022A CN104811603A CN 104811603 A CN104811603 A CN 104811603A CN 201410037022 A CN201410037022 A CN 201410037022A CN 104811603 A CN104811603 A CN 104811603A
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Abstract
The invention provides an auxiliary focusing device and an auxiliary focusing method. The method comprises the following steps: first, capturing a first real-time image at a first distance relative to an object to be shot; then, calculating the sharpness value of the first real-time image; capturing a second real-time image at a second distance relative to the object to be shot; calculating the sharpness value of the second real-time image; and comparing the sharpness value of the first real-time image and the sharpness value of the second real-time image and transmitting a notification signal which indicates the relationship between the first distance and a focal distance and between the second distance and the focal distance. The method can indicate the relationship between the position of an object to be shot and the focal distance of a camera device to a user and help the user to judge the appropriate direction of movement.
Description
Technical field
The present invention relates to a kind of auxiliary focusing mechanism and method, particularly a kind of auxiliary focusing mechanism and method for having single focal length.
Background technology
Current camera is on the market of a great variety, words for focus function can divide into the camera having automatic focusing function Yu do not have automatic focusing function, there is the camera of automatic focusing function in use, user only needs flicking shutter to start auto-focusing, after camera auto-alignment focal length, press shutter again, can clear photograph be taken.But when use does not have the camera of focus function, user by the focusing ring on rotating lens, must choose to treat and take the photograph the suitable focal length of thing, confirm that after the image definition taking the photograph thing, pressing shutter again in picture window takes pictures until eyes.
If but camera lens also cannot choose different focal lengths, namely when camera lens only has the situation of single focal length, user just needs the focal length being found this camera lens by the mode of shift position, until picture window namely stop after taking the photograph thing image and be clear from fuzzy change because position is moved move and press shutter and take pictures.But, if there is no the equipment of auxiliary focusing, the moving direction that user's caused by inconvenient judgment is suitable or distance.
Summary of the invention
The object of the present invention is to provide a kind of auxiliary focusing mechanism and method, make it focus by assisted user.
For achieving the above object, the present invention proposes a kind of multimedia management device, multi-media management method and performs the computer fetch medium of multi-media management method, to display the play record by broadcasting media interface, the image frame which multi-medium file can be learnt to help user check by other user.
For achieving the above object, the invention provides a kind of auxiliary focusing mechanism, described auxiliary focusing mechanism has image acquisition module and image processing module.Described image acquisition module is used to treat mutually the first distance taking the photograph thing and captures the first real-time imaging and capture the second real-time imaging in treating the second distance taking the photograph thing mutually.Described image processing module couples image acquisition module, image processing module is in order to the sharp keen angle value of the sharp keen angle value and the second real-time imaging that calculate the first real-time imaging, the relatively sharp keen angle value of the first real-time imaging and the sharp keen angle value of the second real-time imaging transmit notification signal, notification signal represents the relativeness of the first distance, second distance and focal length.
Wherein, when this image processing module judges that the sharp keen angle value of the first real-time imaging is greater than the sharp keen angle value of this second real-time imaging, the sharp keen angle value of this first real-time imaging is a threshold value of the sharp keen angle value comparing one the 3rd real-time imaging, and the 3rd real-time imaging is by one the 3rd distance captured in this thing to be taken the photograph relative.
Wherein, when this image processing module judges that the sharp keen angle value of the first real-time imaging is less than the sharp keen angle value of this second real-time imaging, the sharp keen angle value of this second real-time imaging is a threshold value of the sharp keen angle value comparing one the 3rd real-time imaging, and the 3rd real-time imaging is by one the 3rd distance captured in this thing to be taken the photograph relative.
Wherein, when this image processing module judges that the sharp keen angle value of the 3rd real-time imaging is less than this threshold value, this threshold value is the maximum sharpness value in a moving area.
Wherein, when this image processing module judges that the sharp keen angle value of the 3rd real-time imaging equals the maximum sharpness value of this moving area, this notification signal represents that the 3rd distance is this focal length.
Wherein, this notification signal is shown on a display interface.
For achieving the above object, the invention provides a kind of auxilary focusing method, in treating first distance acquisition the first real-time imaging taking the photograph thing mutually.Calculate the sharp keen angle value of the first real-time imaging.The second real-time imaging is captured in treating the second distance taking the photograph thing mutually.The sharp keen angle value of the sharp keen angle value calculating the second real-time imaging and the sharp keen angle value comparing the first real-time imaging and the second real-time imaging also transmits notification signal, and notification signal represents the relativeness of the first distance, second distance and focal length.
Wherein, when the sharp keen angle value of this first real-time imaging is greater than the sharp keen angle value of this second real-time imaging, the sharp keen angle value of this first real-time imaging is a threshold value of the sharp keen angle value comparing one the 3rd real-time imaging, and the 3rd real-time imaging is by one the 3rd distance captured in this thing to be taken the photograph relative.
Wherein, when the sharp keen angle value of this first real-time imaging is less than the sharp keen angle value of this second real-time imaging, the sharp keen angle value of this second real-time imaging is a threshold value of the sharp keen angle value comparing one the 3rd real-time imaging, and the 3rd real-time imaging is by one the 3rd distance captured in this thing to be taken the photograph relative.
Wherein, when the sharp keen angle value of the 3rd real-time imaging is less than this threshold value, this threshold value is the maximum sharpness value in a moving area.
Wherein, when the sharp keen angle value of the 3rd real-time imaging equals the maximum sharpness value of this moving area, this notification signal represents that the 3rd distance is this focal length.
Wherein, this notification signal is shown on a display interface.
In sum, the present invention by comparing, the different distance relative to thing to be taken the photograph captures the sharp keen angle value of real-time imaging, judge according to this this time relative to thing to be taken the photograph distance compared to last time relative to the distance of thing to be taken the photograph be near or away from the focal length taking thing to be taken the photograph, and according to this relative to the distance of thing to be taken the photograph and and the focal length taking thing to be taken the photograph between relativeness transmit different types of notification signal, thus assisted user focusing.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the auxiliary focusing mechanism according to one embodiment of the invention.
Fig. 2 is the flow chart of the auxilary focusing method according to one embodiment of the invention.
Fig. 3 A is the schematic diagram of the first distance according to one embodiment of the invention, second distance and focal length relativeness.
Fig. 3 B is the schematic diagram of the first distance according to another embodiment of the present invention, second distance and focal length relativeness.
Fig. 4 is the schematic diagram of the auxilary focusing method according to one embodiment of the invention.
Wherein, Reference numeral:
1 auxiliary focusing mechanism
10 image acquisition modules
12 image processing modules
14 storage modules
16 power supply modules
D1 first distance
D2 second distance
D3 the 3rd distance
D4 focal length
Embodiment
Below detailed features of the present invention and advantage is described in embodiments in detail, its content is enough to make any those skilled in the art understand technology contents of the present invention and implement according to this, and content disclosed by this specification, claim and graphic, any those skilled in the art can understand the object and advantage that the present invention is correlated with easily.Following embodiment further describes viewpoint of the present invention, but non-to limit category of the present invention anyways.
Please with reference to Fig. 1, Fig. 3 A, Fig. 3 B and Fig. 4.Wherein Fig. 1 is be be the schematic diagram of the auxilary focusing method of foundation one embodiment of the invention according to the schematic diagram of first distance of another embodiment of the present invention, second distance and focal length relativeness and Fig. 4 according to the schematic diagram of first distance of one embodiment of the invention, second distance and focal length relativeness, Fig. 3 B according to the auxiliary focusing mechanism functional block diagram of one embodiment of the invention, Fig. 3 A.As shown in Figure 1, auxiliary focusing mechanism 1 comprises image acquisition module 10, image processing module 12 and storage module 14.Wherein image processing module 12 couples image acquisition module 10 and storage module 14.
Image acquisition module 10 is used to treat mutually the first distance D1 taking the photograph thing and captures the first real-time imaging and capture the second real-time imaging in treating the second distance D2 taking the photograph thing mutually.In other words, image acquisition module 10 can capture the real-time imaging of thing to be taken the photograph on diverse location.In practice, image acquisition module 10 can be that the camera lens with single focal length, camera lens, a network take the photograph device camera lens or or other suitable photographic equipments.In addition, image acquisition module 10 more comprises a kind of by charge coupled cell (chargecoupled device, or CMOS (Complementary Metal Oxide Semiconductor) (complementary metal oxidesemiconductor CCD), CMOS) image sensor (image sensor) made by, but the present invention is not stated as limit with above-mentioned.
After the sharp keen angle value of image processing module 12 in order to the sharp keen angle value and the second real-time imaging that calculate the first real-time imaging respectively, compare the sharp keen angle value of the first real-time imaging and the sharp keen angle value of the second real-time imaging and transmit notification signal.This notification signal represents the relativeness of the first distance D1, second distance D2 and focal length D4.In an example, after image processing module 12 calculates the sharp keen angle value of the real-time imaging that first time receives, the sharp keen angle value being about to calculate temporarily is stored to storage module 14.Then, image processing module 12 calculates the sharp keen angle value of the real-time imaging that second time receives again, and next the sharp keen angle value calculated also temporarily is stored to storage module 14.
Then, taking out from storage module 14 when image processing module 12 and compare these two sharp keen angle value sizes, wherein sharp keen angle value the greater of real-time imaging is used as the threshold value of the sharp keen angle value of next real-time imaging the 3rd real-time imaging of thing to be taken the photograph the 3rd distance D3 (such as apart).Comparative result represents auxiliary focusing mechanism 1 relative to the gap between the distance of thing to be taken the photograph and the focal length D4 taking thing to be taken the photograph.In more detail, namely auxiliary focusing mechanism 1 place position and with wait taking the photograph the gap between the position that thing is auxiliary focusing mechanism during focus 1 place, and transmit corresponding notification signal according to comparative result.As shown in Fig. 3 A and Fig. 3 B, the first signal can be transmitted when the first distance D1 is greater than second distance D2, in order to notify user just away from focal length D4, secondary signal can be transmitted when the first distance D1 is less than second distance D2, in order to notify user just near focal length D4.In addition, also the first signal and secondary signal can be transmitted respectively when the 3rd distance D3 is less than threshold value time and when the 3rd distance D3 is greater than threshold value, and when the 3rd distance D3 is equal with focal length D4, then can transmit the 3rd signal, in order to notify that user is to arrive focal length D4.Because the sharp keen angle value of real-time imaging calculates known by those skilled in the art of the present technique, therefore repeat no more.
Moreover, notification signal can be display and to be sent on display interface, by the mode of light source, sound source also or be sent to calculator device, calculator device transmits corresponding signal in image application program by accepting variety classes notification signal, in order to notify that user is relative to the distance of thing to be taken the photograph and the corresponding relation of gap of focal length D4 of taking thing to be taken the photograph.In practice, calculator device can be computer, notebook computer, intelligent mobile phone or flat computer, and image processing module 12 can be microprocessor (micro processor) or image processor (graphics processing unit), storage module 14 can be a kind of programmble read only memory PROM (programmable read-only memory, PROM), erasable programmble read only memory PROM (erasable programmable read-only memory, EPROM), erasable programmble read only memory PROM (electrically erasable programmable read-only memory, EEPROM), the non-voltile memories (non-volatile memory) such as flash memory (flash memory), but the present invention is not as limit.
In practice, auxiliary focusing mechanism 1 more comprises a power supply module 16, and this power supply module 16 is in order to provide electric energy to image acquisition module 10, image processing module 12 and storage module 14.Power supply module 16 can be that battery module is as solar cell or fuel cell, it can also be alternating current circuit module, comprise alternating-current power supply, one group in order to change the AC/DC converter (AC/DCconverter) of current waveform and one group in order to adjust the DC chopper of charging current, but the present invention is not as limit.
Method in one embodiment of the invention, please with reference to Fig. 1, Fig. 2 and Fig. 4.Fig. 2 is the method flow diagram according to one embodiment of the invention.As shown in step S200, image acquisition module 10 captures the first real-time imaging in treating the one section of first distance D1 taking the photograph thing mutually.As shown in step S202, image processing module 12 calculates the sharp keen angle value of this first real-time imaging and is stored to storage module 14.As shown in step S204, image acquisition module 10 captures the second real-time imaging in treating the second distance D2 taking the photograph thing mutually.As shown in step S206, image processing module 12 calculates the sharp keen angle value of the second real-time imaging, and this result is stored to storage module 14.
At this, when auxiliary focusing mechanism 1 moves to another location (such as apart wait taking the photograph thing second distance D2) from a position (such as apart wait taking the photograph thing first apart from D1), namely image acquisition module 10 captures the real-time imaging of thing to be taken the photograph with this different position, and this real-time imaging is sent to image processing module 12, then image processing module 12 calculates the sharp keen angle value of the real-time imaging of diverse location respectively.
It is worth mentioning that, the order of above-mentioned steps S200 to S206 can be exchanged mutually, namely, after image acquisition module 10 can first capture the real-time imaging of the first distance D1 and second distance D2, image processing module 12 again footpath row calculates the sharp keen angle value of the first real-time imaging and the second real-time imaging.
As shown in step S208, image processing module 12 compares the sharp keen angle value of the first real-time imaging and the sharp keen angle value of the second real-time imaging, and transmits notification signal according to the relativeness of the first distance D1, second distance D2 and focal length D4.As shown in step S210, when the sharp keen angle value of the first real-time imaging is greater than the sharp keen angle value of the second real-time imaging, when namely the difference of the first distance D1 and focal length D4 is less than the difference of second distance D2 and focal length D4, transmit notification signal.In more detail, when the direction moving to second distance D2 is the opposite direction toward focal length direction, this position captures the real-time imaging of thing to be taken the photograph sharp keen angle value can comparatively before the sharp keen angle value of real-time imaging that once captures be low, namely the gap of second distance D2 and focal length D4 increases.Now image processing module 12 transmits the first signal, to notify that user is just taking the focal length D4 of thing to be taken the photograph away from auxiliary focusing mechanism 1, and the sharp keen angle value of previous real-time imaging is set as a threshold value, compare in order to the sharp keen angle value with next real-time imaging.
As shown in step S212, when the sharp keen angle value of the first real-time imaging is less than the sharp keen angle value of the second real-time imaging, when namely the difference of the first distance D1 and focal length D4 is greater than the difference of second distance D2 and focal length D4, transmit notification signal.In other words, when the direction moving to second distance D2 is the direction toward focal length direction, this position captures the real-time imaging of thing to be taken the photograph sharp keen angle value can comparatively before the sharp keen angle value of real-time imaging that once captures for high, namely the gap of second distance D2 and focal length D4 reduces.Now image processing module 12 transmits secondary signal, to notify that user is just taking the focal length D4 of thing to be taken the photograph near auxiliary focusing mechanism 1, and the sharp keen angle value of this real-time imaging is set as a threshold value, compare with the sharp keen angle value with next real-time imaging.
As shown in step S214, image acquisition module 10 captures the 3rd real-time imaging in treating one section of the 3rd distance D3 taking the photograph thing mutually.As shown in step S216, image processing module 12 calculates the sharp keen angle value of this 3rd real-time imaging and is stored to storage module 14.As shown in step S218, relatively whether the 3rd real-time imaging is greater than threshold value, and when the sharp keen angle value of the 3rd real-time imaging is greater than threshold value, namely the sharp keen angle value of the 3rd real-time imaging replaces the threshold value that this threshold value is the sharp keen angle value of more next real-time imaging, and transmits secondary signal to notify that user is just taking the focal length D4 of thing to be taken the photograph near auxiliary focusing mechanism 1 by image processing module 12.
As shown in step S220, when the sharp keen angle value of the 3rd real-time imaging is not more than threshold value, namely judge whether this sharp keen angle value is equal to threshold value.As shown in step S222, when the sharp keen angle value of the 3rd real-time imaging is less than threshold value, in order to represent that the gap of second distance D2 and focal length D4 increases, threshold value is the maximum sharpness value in moving area.In other words, when more leaning on into focal length D4, the sharp keen angle value of the real-time imaging of its acquisition can raise gradually, until after crossing focal length D4, its sharp keen angle value can reduce gradually, therefore, if the sharp keen angle value of the real-time imaging of next acquisition is less than threshold value, namely represent the maximum sharpness value of this threshold value for this reason in moving area.
As shown in step S224, when the sharp keen angle value of the 3rd real-time imaging equals the maximum sharpness value of moving area, notification signal represents that the 3rd distance D3 is focal length D4.More detailed says, after the maximum sharpness value obtaining this moving area, when one of them real-time imaging of follow-up acquisition sharp keen angle value therewith maximum sharpness value equal, namely the position representing this acquisition real-time imaging is pinpointed focus distance D4 in moving area, and now image processing module 12 transmits the 3rd signal and informs that user has moved to the pinpointed focus distance D4 taking thing to be taken the photograph.
The present invention illustrates overall flow in this with an example, when after the image application program that user's opening network video camera is corresponding, namely network camera first captures the real-time imaging of thing to be taken the photograph, and calculates the sharp keen angle value of this real-time imaging, and user starts mobile network's video camera thereafter.Now, namely network camera captures the real-time imaging of another thing to be taken the photograph by the change on position, and the relatively this time sharp keen angle value of real-time imaging of movement and size of the sharp keen angle value of previous real-time imaging.If move up toward the focal length side away from this network camera, then send the second notification signal (secondary signal) and notify user away from the focal position taking thing to be taken the photograph.If move up toward the focal length side near this network camera, then send the first notification signal (the first signal) and notify user near the focal position taking thing to be taken the photograph.And when user moves toward the direction of focal position and crosses this focal position, because the sharp keen angle value of real-time imaging can reduce gradually, now namely find the maximum sharpness value of the real-time imaging in moving range, also the optimal focus position taking thing to be taken the photograph is found, when user moves to this focal position, namely network camera sends the third notification signal (the 3rd signal) and notifies that user is to arrive best shooting distance.
In sum, the present invention captures real-time imaging by image capturing device in the different distance relative to thing to be taken the photograph, image processing apparatus calculates institute and capture the sharp keen angle value of real-time shadow and compare this sharp keen angle value size to judge that this distance relative to thing to be taken the photograph is close relative to the distance of thing to be taken the photograph or away from the focal length taking thing to be taken the photograph compared with last time, and transmit different types of notification signal with the relativeness of the focal length taking thing to be taken the photograph according to this place distance, thus assisted user focusing.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claims in the present invention.
Claims (12)
1. an auxilary focusing method, is characterized in that, comprising:
In one first distance acquisition one first real-time imaging of a relative thing to be taken the photograph;
Calculate the sharp keen angle value of this first real-time imaging;
In second distance acquisition one second real-time imaging of this thing to be taken the photograph relative;
Calculate the sharp keen angle value of this second real-time imaging; And
The relatively sharp keen angle value of this first real-time imaging and the sharp keen angle value of this second real-time imaging transmit a notification signal, this notification signal represents the relativeness of this first distance, this second distance and a focal length.
2. auxilary focusing method according to claim 1, it is characterized in that, when the sharp keen angle value of this first real-time imaging is greater than the sharp keen angle value of this second real-time imaging, the sharp keen angle value of this first real-time imaging is a threshold value of the sharp keen angle value comparing one the 3rd real-time imaging, and the 3rd real-time imaging is by one the 3rd distance captured in this thing to be taken the photograph relative.
3. auxilary focusing method according to claim 1, it is characterized in that, when the sharp keen angle value of this first real-time imaging is less than the sharp keen angle value of this second real-time imaging, the sharp keen angle value of this second real-time imaging is a threshold value of the sharp keen angle value comparing one the 3rd real-time imaging, and the 3rd real-time imaging is by one the 3rd distance captured in this thing to be taken the photograph relative.
4. auxilary focusing method according to claim 3, is characterized in that, when the sharp keen angle value of the 3rd real-time imaging is less than this threshold value, this threshold value is the maximum sharpness value in a moving area.
5. auxilary focusing method according to claim 4, is characterized in that, when the sharp keen angle value of the 3rd real-time imaging equals the maximum sharpness value of this moving area, this notification signal represents that the 3rd distance is this focal length.
6. auxilary focusing method according to claim 1, is characterized in that, this notification signal is shown on a display interface.
7. an auxiliary focusing mechanism, is characterized in that, comprises:
One image acquisition module, one first distance acquisition one first real-time imaging in a relative thing to be taken the photograph and second distance acquisition one second real-time imaging in this thing to be taken the photograph relative; And
One image processing module, couple this image acquisition module, this image processing module calculates the sharp keen angle value of this first real-time imaging and the sharp keen angle value of this second real-time imaging, the relatively sharp keen angle value of this first real-time imaging and the sharp keen angle value of this second real-time imaging transmit a notification signal, this notification signal represents the relativeness of this first distance, this second distance and a focal length.
8. auxiliary focusing mechanism according to claim 7, it is characterized in that, when this image processing module judges that the sharp keen angle value of the first real-time imaging is greater than the sharp keen angle value of this second real-time imaging, the sharp keen angle value of this first real-time imaging is a threshold value of the sharp keen angle value comparing one the 3rd real-time imaging, and the 3rd real-time imaging is by one the 3rd distance captured in this thing to be taken the photograph relative.
9. auxiliary focusing mechanism according to claim 7, it is characterized in that, when this image processing module judges that the sharp keen angle value of the first real-time imaging is less than the sharp keen angle value of this second real-time imaging, the sharp keen angle value of this second real-time imaging is a threshold value of the sharp keen angle value comparing one the 3rd real-time imaging, and the 3rd real-time imaging is by one the 3rd distance captured in this thing to be taken the photograph relative.
10. auxiliary focusing mechanism according to claim 9, is characterized in that, when this image processing module judges that the sharp keen angle value of the 3rd real-time imaging is less than this threshold value, this threshold value is the maximum sharpness value in a moving area.
11. auxiliary focusing mechanisms according to claim 10, it is characterized in that, when this image processing module judges that the sharp keen angle value of the 3rd real-time imaging equals the maximum sharpness value of this moving area, this notification signal represents that the 3rd distance is for this focal length.
12. auxiliary focusing mechanisms according to claim 7, is characterized in that, this notification signal is shown on a display interface.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112463269A (en) * | 2019-09-06 | 2021-03-09 | 青岛海信传媒网络技术有限公司 | User interface display method and display equipment |
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| US20090074396A1 (en) * | 2007-09-14 | 2009-03-19 | Samsung Electronics Co., Ltd. | Auto-focus method, medium, and apparatus for image-capturing |
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| CN100429546C (en) * | 2002-10-24 | 2008-10-29 | 夏普株式会社 | Focus state display |
| CN1865849A (en) * | 2005-05-20 | 2006-11-22 | 日产自动车株式会社 | Image display apparatus and method |
| US20090074396A1 (en) * | 2007-09-14 | 2009-03-19 | Samsung Electronics Co., Ltd. | Auto-focus method, medium, and apparatus for image-capturing |
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