CN104853082A - Method and apparatus of shooting panorama picture - Google Patents
Method and apparatus of shooting panorama picture Download PDFInfo
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- CN104853082A CN104853082A CN201410691450.XA CN201410691450A CN104853082A CN 104853082 A CN104853082 A CN 104853082A CN 201410691450 A CN201410691450 A CN 201410691450A CN 104853082 A CN104853082 A CN 104853082A
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Abstract
The embodiment of the invention relates to the mobile terminal technical field, especially a method and apparatus of shooting a panorama picture. The method comprises: determining exposure time of a camera in a mobile device; determining a shooting mode of the camera according to the exposure time; employing a determined camera shooting mode to shoot a panorama picture. The method meets requirements of a camera for exposure time in shooting a panorama picture, and improves the quality of shooting the panorama picture.
Description
Technical field
The embodiment of the present invention relates to technical field of mobile terminals, particularly relates to a kind of method and device of the picture that pans.
Background technology
Intelligent mobile terminal, as smart mobile phone and panel computer etc. are more and more universal in the last few years, adopts the camera pictures taken in intelligent mobile terminal to become the critical function of mobile terminal.Under special scenes, need as during shooting scenery picture the picture that pans.
Adopt electrical motor driven camera to rotate in current intelligent mobile terminal, in camera rotary course, take a series of continuous print picture, and by the picture of shooting synthesis panoramic pictures.
Existingly pan in picture approach, when camera rotates too fast, cause the picture blur taken.The time for exposure shortening camera can improve picture blur problem, but the noise of picture can be made comparatively large, and luminance shortage.That is, the method for the existing picture that pans can not guarantee the quality of panoramic pictures.
Summary of the invention
The object of the invention is the method and the device that propose a kind of picture that pans, to improve the quality of the panoramic pictures of shooting.
On the one hand, embodiments provide a kind of method of the picture that pans, comprising:
Determine the time for exposure of camera in mobile device;
The screening-mode of camera is determined according to the described time for exposure;
The screening-mode of camera determined is adopted to pan picture.
On the other hand, embodiments provide a kind of device of the picture that pans, comprising:
Time determining unit, for determining the time for exposure of camera in mobile device;
Pattern determining unit, for determining the screening-mode of camera according to the described time for exposure;
Picture shooting unit, to pan picture for adopting the screening-mode of the camera determined.
The method of the picture that pans provided in the embodiment of the present invention and device, can improve the quality of the panoramic pictures of shooting.What provide in the embodiment of the present invention pans in the method for picture, determine the time for exposure of camera in mobile device, and the screening-mode of camera is determined according to the described time for exposure, the screening-mode determined is adopted to pan picture, namely, the method pan picture time meet the demand of camera to the time for exposure, improve the quality of the panoramic pictures of shooting.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide the further understanding to the embodiment of the present invention, forms a part for the embodiment of the present invention, does not form the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the realization flow figure of the method for the picture that pans provided in first embodiment of the invention;
Fig. 2 is that the employing card provided in second embodiment of the invention pauses the realization flow figure of exposal model pictures taken;
Fig. 3 is the realization flow figure of the continuous exposal model pictures taken of employing provided in third embodiment of the invention;
Fig. 4 is the schematic diagram of angle corresponding to the single pixel that provides in third embodiment of the invention
Fig. 5 is the fuzzy tolerance level of camera when being 0, the picture of camera shooting;
Fig. 6 is the fuzzy tolerance level of camera when being 2, the picture of camera shooting;
Fig. 7 is the fuzzy tolerance level of camera when being 4, the picture of camera shooting;
Fig. 8 is the fuzzy tolerance level of camera when being 6, the picture of camera shooting;
Fig. 9 is the fuzzy tolerance level of camera when being 8, the picture of camera shooting;
Figure 10 is the fuzzy tolerance level of camera when being 10, the picture of camera shooting;
Figure 11 is the structural representation of the device of the picture that pans provided in fourth embodiment of the invention.
Embodiment
Below in conjunction with drawings and the specific embodiments, the embodiment of the present invention is carried out more in detail and complete explanation.Be understandable that, specific embodiment described herein is only for explaining the embodiment of the present invention, but not the restriction to the embodiment of the present invention.It also should be noted that, for convenience of description, illustrate only the part relevant to the embodiment of the present invention in accompanying drawing but not full content.
First embodiment:
Fig. 1 is the realization flow figure of the method for the picture that pans provided in first embodiment of the invention, the method can be performed by the device of the picture that pans, wherein this device can by software and/or hardware implementing, and the part that can be used as mobile device is built in mobile device inside.As shown in Figure 1, this realization flow comprises:
Step 11, determine time for exposure of camera in mobile device.
International Organization for standardization (the International Standards Organization of camera, ISO) product of photosensitivity and time for exposure, with mobile device residing for the brightness value of environment proportional, when the brightness value of environment is fixed, ISO photosensitivity is larger, and the time for exposure is less; Vice versa.Wherein, the brightness value of environment residing for mobile device can be recorded by imageing sensor in camera.In addition, ISO photosensitivity, time for exposure are also relevant with the light-inletting quantity of camera, and when the brightness value of environment is fixed, the aperture of camera is larger, ISO photosensitivity and the time for exposure less.
As, for same camera, under automatic shooting pattern, when surround lighting is dimmed, ISO photosensitivity and time for exposure all increase.Concrete, under outdoor solar light direct projection, the ISO photosensitivity of camera gets 100, when the time for exposure gets 1/336 second, can shoot picture clearly; When indoor, the ISO photosensitivity of camera gets 200, when the time for exposure gets 1/23 second, can shoot picture clearly; At night and open photoflash lamp time, the ISO photosensitivity of camera gets 800, and the time for exposure gets 1/14 second.
Step 12, determine the screening-mode of camera according to the described time for exposure.
Wherein, determining the screening-mode of camera according to the described time for exposure, can comprise: determine whether the described time for exposure is less than default time for exposure threshold value, if so, then determining that the screening-mode of camera is for presetting continuous exposal model; Otherwise, determine that the screening-mode of camera is for presetting a card exposal model.
When the described time for exposure is more than or equal to default time for exposure threshold value, the time for exposure needed for any picture panned in picture is longer; When the described time for exposure is less than default time for exposure threshold value, the time for exposure needed for any picture panned in picture is shorter.Wherein, described default time for exposure threshold value is preset by user, as it can be 100 milliseconds.
Step 13, the screening-mode of camera determined is adopted to pan picture.
Adopt in step 12 screening-mode of the camera determined to pan picture, e.g., when the time for exposure is less than default time for exposure threshold value, adopts and preset continuous exposal model and to pan picture; When the time for exposure is equal to or greater than default time for exposure threshold value, adopts and preset a card exposal model and to pan picture.
Adopt and preset continuous exposal model pictures taken, that is, pictures taken in the process of camera rotation.Because the time for exposure of camera is shorter, in the process that camera rotates, pictures taken can meet the demand of camera to the time for exposure, can also improve the capture rate of panoramic pictures.
Adopt a card exposal model pictures taken, that is, adopt " rotate-stop the rotation-take pictures " mode pictures taken.Concrete, not pictures taken in the process that camera rotates, and when camera stops the rotation just pictures taken.Because the time for exposure of camera is longer, only the ability pictures taken when camera stops the rotation, meets the demand of camera to the time for exposure, improves the picture quality of shooting.
The method of the picture that pans provided in first embodiment of the invention, determines the time for exposure of camera in mobile device, determines the screening-mode of camera according to time for exposure of determining, adopts the screening-mode determined to pan picture.Concrete, when the described time for exposure is longer, adopts and preset a card exposal model and to pan picture; When the described time for exposure is shorter, adopts and preset continuous exposal model pictures taken, both met the demand to the time for exposure, and improve the quality of the panoramic pictures of shooting, and turn improved the capture rate of panoramic pictures.
Second embodiment:
Second embodiment is the further restriction to step 13 in the first embodiment.Fig. 2 is that the employing card provided in second embodiment of the invention pauses the realization flow figure of exposal model pictures taken, as shown in Figure 2, adopts and presets a card exposal model pictures taken and can comprise:
Step 21, driving camera rotate predetermined angle, and pictures taken.
Motor in mobile device drives camera to rotate predetermined angle, rotate 5 ° as driven camera and stop the rotation, after camera stops the rotation, adopt the time for exposure pictures taken that in above-described embodiment, camera is determined according to the brightness value of environment residing for mobile device.
After camera stops the rotation, pictures taken can meet the demand to the time for exposure, improves the quality of the picture of shooting.
Step 22, repeat to drive camera to rotate predetermined angle, and pictures taken, until camera rotates to angle on target, and till the position pictures taken that angle on target is corresponding.
Motor and camera repeat following operation, until camera rotates to angle on target, and till the position pictures taken that angle on target is corresponding: motor drives camera to rotate predetermined angle, and stops the rotation; After camera stops the rotation, camera pictures taken.
Wherein, user can arrange described angle on target according to shooting demand, and e.g., described angle on target can be 180 degree.
Step 23, the picture of shooting is synthesized panoramic pictures.
Each picture of camera shooting in step 21 and step 22 is synthesized panoramic pictures.
As, each anglec of rotation of camera is 5 °, and stopping and taking a pictures consuming time after rotating is 100ms, and the panoramic pictures required time so having clapped 180 ° is T:
Therefore, adopt that to preset pan time of picture of card exposal model shorter, improve the capture rate of panoramic pictures.
The employing card provided in second embodiment of the invention pauses the method for exposal model pictures taken, and camera stops the rotation after rotating predetermined angle; After camera stops the rotation, shooting one secondary picture; Circulation performs aforesaid operations, after having taken each picture, each picture of shooting is synthesized panoramic pictures.In the method, the shooting of each picture all meets the demand of time for exposure, improves the quality of each picture, thus improves the quality of panoramic pictures.
3rd embodiment:
3rd embodiment is the further restriction to step 13 in the first embodiment.Fig. 3 is the realization flow figure of the continuous exposal model pictures taken of employing provided in third embodiment of the invention, as shown in Figure 3, adopts and presets continuous exposal model pictures taken, can comprise:
Step 31, according to following formula, calculate the angular velocity of rotation R:R=k/exr of camera, wherein, exr is the described time for exposure, and k is preset angle velocity coefficient corresponding to described time for exposure.
When the time for exposure of camera is exr, camera is taken the maximum angular velocity of rotation that unambiguous picture can adopt and is:
R＝k/exr
Wherein k is unit degree of the being/second of the preset angle velocity coefficient that described time for exposure exr is corresponding, angular velocity of rotation R.
Wherein, before calculating the angular velocity of rotation of camera, can also comprise: according to following formula, calculate described preset angle velocity coefficient K:
k＝B*A/Res
Wherein, B is the fuzzy tolerance level of camera in mobile device, and A is the visible angle of camera, and Res is the resolution Res (Resolution) of the current use of camera.
Fig. 4 is the schematic diagram of angle corresponding to the single pixel that provides in third embodiment of the invention, as shown in Figure 4, it is 60 ° in the value of horizontal visible angle (the Angle Of View) A of camera, the resolution used during panorama is 4208x3120, namely, when Res is 4208, angle corresponding to each pixel is 60 °/4208=0.01425 °.The displacement (making image blurring degree because of motion) produced because of unstable when B represents that camera is taken pictures, unit is pixel, when B represents that camera is taken pictures when being 1, jitter amplitude is angle corresponding to a pixel, when B represents that camera is taken pictures when being 2, jitter amplitude is angle corresponding to two pixels, and the rest may be inferred.
When the angular velocity of rotation of camera is less than the maximum angular velocity of rotation calculated in step 31, the anglec of rotation of camera within a time for exposure is less than the displacement produced because of unstable when camera is taken pictures, that is, camera can take unambiguous picture.
Wherein, A and Res is fixing parameter, and B can determine a suitable value according to the Subjective need of user.Fig. 5-10 is B when getting 0,2,4,6,8 and 10 successively, the picture of camera shooting.Shown in composition graphs 5-10, when B gets 0, the most clear wash rice of picture of shooting, starts to fog when B gets 4, and unacceptable when B gets 8, thus can think that B gets 6 is maximum receptible fog-levels.When B gets 6, angular speed COEFFICIENT K is 0.0855, and when the time for exposure is 0.01 second, when clapping the panoramic pictures of 180 degree, the rotational time of camera controls at 21 seconds, is suitable.If the time for exposure is 1/300 second, just can by 7 second time turnback, and also it is not fuzzy to take the picture obtained.
Step 32, with the angular velocity of rotation calculated drive camera rotate and with described time for exposure pictures taken in rotary course.
Motor in mobile device drives camera to rotate with the angular velocity of rotation calculated in step 41, and with the time for exposure pictures taken determined in embodiment one or embodiment two in rotary course.
Step 33, the picture of shooting is synthesized panoramic pictures.
Each picture of shooting in step 32 is synthesized panoramic pictures.
The method of the continuous exposal model pictures taken of the employing provided in third embodiment of the invention, in the process that camera rotates with certain angular velocity of rotation, camera adopts the time for exposure pictures taken that the brightness value of environment residing for mobile device is corresponding, and each picture of shooting is synthesized panoramic pictures.In the process that the method rotates at camera, pictures taken improves the capture rate of panoramic pictures, and the shooting of each picture all meets the demand of time for exposure, improves the quality of panoramic pictures.
Fourth embodiment of the invention is device embodiment, and the inventive method embodiment and device embodiment belong to same design, and the detail content of not detailed description in device embodiment can with reference to said method embodiment.
4th embodiment:
Figure 11 is the structural representation of the device of the picture that pans provided in fourth embodiment of the invention, and as shown in figure 11, the device of this picture that pans can comprise time determining unit 41, for determining the time for exposure of camera in mobile device; Pattern determining unit 42, for determining the screening-mode of camera according to the described time for exposure; Picture shooting unit 43, to pan picture for adopting the screening-mode of the camera determined.
Wherein, pattern determining unit 42 can comprise: the time determines subelement, for determining whether the described time for exposure is less than default time for exposure threshold value; A card shooting subelement, for when the described time for exposure is more than or equal to default time for exposure threshold value, determines that the screening-mode of camera is for presetting a card exposal model; Continuous shooting subelement, for when the described time for exposure is less than default time for exposure threshold value, determines that the screening-mode of camera is for presetting continuous exposal model.
Wherein, when the screening-mode of the camera determined is for presetting card exposal model, picture shooting unit 43 comprises: the first shooting subelement, for driving camera to rotate predetermined angle, and pictures taken; Repeating to take subelement, driving camera to rotate predetermined angle for repeating, and pictures taken, until camera rotates to angle on target, and till the position pictures taken that angle on target is corresponding; First picture synthon unit, for synthesizing panoramic pictures by the picture of shooting.
Wherein, when the screening-mode of the camera determined is for presetting continuous exposal model, picture shooting unit 43 can comprise: angular speed calculation subelement, for according to following formula, calculate the angular velocity of rotation R:R=k/exr of camera, wherein, exr is the described time for exposure, and k is preset angle velocity coefficient corresponding to described time for exposure; Picture shooting subelement, for the angular velocity of rotation calculated drive camera rotate and with described time for exposure pictures taken in rotary course; Second picture synthon unit, for synthesizing panoramic pictures by the picture of shooting.
Wherein, this device can also comprise coefficient calculation unit, for according to following formula, calculate described preset angle velocity coefficient K:K=AB/Res, wherein, A is the visible angle of described camera, B is the fuzzy tolerance level of described camera, and Res is the resolution of described camera.
The time for exposure of camera in the device determination mobile device of the picture that pans provided in fourth embodiment of the invention, and the method for pictures taken is rationally determined according to the described time for exposure, realize panning fast picture and improve the quality of panoramic pictures of shooting.
It should be noted that, in the embodiment of the present invention, additionally provide a kind of mobile device, the device of the picture that pans provided in any embodiment of the present invention is provided.As, this mobile device can comprise time determining unit, pattern determining unit and picture shooting unit.Wherein, pattern determining unit can comprise the time and determines subelement, a card shooting subelement and take subelement continuously.When the screening-mode of the camera determined is for presetting card exposal model, picture shooting unit comprises the first shooting subelement, repeats shooting subelement and the first picture synthon unit; When the screening-mode of the camera determined is for presetting continuous exposal model, picture shooting unit can comprise angular speed calculation subelement, picture shooting subelement and second picture synthon unit.This device can also comprise coefficient calculation unit.
Mobile device to be panned picture fast by electronic rotation camera, it utilizes the time for exposure of the brightness determination camera of environment residing for self, and determine that camera adopts a card exposal model still to adopt continuous exposal model, improve the quality of the panoramic pictures of shooting, and improve the capture rate of panoramic pictures.
Be only the preferred embodiment of the embodiment of the present invention described in upper, be not limited to the embodiment of the present invention, to those skilled in the art, the embodiment of the present invention can have various change and change.Any amendment done within all spirit in the embodiment of the present invention and principle, equivalent replacement, improvement etc., within the protection range that all should be included in the embodiment of the present invention.
Claims (10)
1. pan the method for picture, it is characterized in that, comprising:
Determine the time for exposure of camera in mobile device;
The screening-mode of camera is determined according to the described time for exposure;
The screening-mode of camera determined is adopted to pan picture.
2. method according to claim 1, is characterized in that, determines the screening-mode of camera, comprising according to the described time for exposure:
Determining whether the described time for exposure is less than default time for exposure threshold value, if so, then determining that the screening-mode of camera is for presetting continuous exposal model; Otherwise, determine that the screening-mode of camera is for presetting a card exposal model.
3. method according to claim 2, is characterized in that, when the screening-mode of the camera determined is for presetting card exposal model,
Adopt the screening-mode of camera determined to pan picture, comprising:
Camera is driven to rotate predetermined angle, and pictures taken;
Repeat to drive camera to rotate predetermined angle, and pictures taken, until camera rotates to angle on target, and till the position pictures taken that angle on target is corresponding;
The picture of shooting is synthesized panoramic pictures.
4. method according to claim 2, is characterized in that, when the screening-mode of the camera determined is for presetting continuous exposal model,
Adopt the screening-mode of camera determined to pan picture, comprising:
According to following formula, calculate the angular velocity of rotation R:R=k/exr of camera, wherein, exr is the described time for exposure, and k is preset angle velocity coefficient corresponding to described time for exposure;
With the angular velocity of rotation calculated driving camera rotation and with described time for exposure pictures taken in rotary course;
The picture of shooting is synthesized panoramic pictures.
5. method according to claim 4, is characterized in that, before calculating the angular velocity of rotation of camera, also comprises:
According to following formula, calculate described preset angle velocity coefficient K:K=AB/Res, wherein, A is the visible angle of described camera, and B is the fuzzy tolerance level of described camera, and Res is the resolution of described camera.
6. pan the device of picture, it is characterized in that, comprising:
Time determining unit, for determining the time for exposure of camera in mobile device;
Pattern determining unit, for determining the screening-mode of camera according to the described time for exposure;
Picture shooting unit, to pan picture for adopting the screening-mode of the camera determined.
7. device according to claim 6, is characterized in that, pattern determining unit comprises:
Time determines subelement, for determining whether the described time for exposure is less than default time for exposure threshold value;
A card shooting subelement, for when the described time for exposure is more than or equal to default time for exposure threshold value, determines that the screening-mode of camera is for presetting a card exposal model;
Continuous shooting subelement, for when the described time for exposure is less than default time for exposure threshold value, determines that the screening-mode of camera is for presetting continuous exposal model.
8. device according to claim 7, is characterized in that, when the screening-mode of the camera determined is for presetting card exposal model,
Picture shooting unit comprises:
First shooting subelement, for driving camera to rotate predetermined angle, and pictures taken;
Repeating to take subelement, driving camera to rotate predetermined angle for repeating, and pictures taken, until camera rotates to angle on target, and till the position pictures taken that angle on target is corresponding;
First picture synthon unit, for synthesizing panoramic pictures by the picture of shooting.
9. device according to claim 7, is characterized in that, when the screening-mode of the camera determined is for presetting continuous exposal model,
Picture shooting unit comprises:
Angular speed calculation subelement, for according to following formula, calculate the angular velocity of rotation R:R=k/exr of camera, wherein, exr is the described time for exposure, and k is preset angle velocity coefficient corresponding to described time for exposure;
Picture shooting subelement, for the angular velocity of rotation calculated drive camera rotate and with described time for exposure pictures taken in rotary course;
Second picture synthon unit, for synthesizing panoramic pictures by the picture of shooting.
10. device according to claim 9, is characterized in that, also comprises:
Coefficient calculation unit, for according to following formula, calculate described preset angle velocity coefficient K:K=AB/Res, wherein, A is the visible angle of described camera, and B is the fuzzy tolerance level of described camera, and Res is the resolution of described camera.
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| CN116703742A (en) * | 2022-11-04 | 2023-09-05 | 荣耀终端有限公司 | Method for identifying blurred image and electronic equipment |
| CN116703742B (en) * | 2022-11-04 | 2024-05-17 | 荣耀终端有限公司 | Method for identifying blurred image and electronic equipment |
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