CN105407280B - Panoramic image synthesis method and system - Google Patents
Panoramic image synthesis method and system Download PDFInfo
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- CN105407280B CN105407280B CN201510768210.XA CN201510768210A CN105407280B CN 105407280 B CN105407280 B CN 105407280B CN 201510768210 A CN201510768210 A CN 201510768210A CN 105407280 B CN105407280 B CN 105407280B
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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
- H04N23/698—Control of cameras or camera modules for achieving an enlarged field of view, e.g. panoramic image capture
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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
- H04N23/95—Computational photography systems, e.g. light-field imaging systems
- H04N23/951—Computational photography systems, e.g. light-field imaging systems by using two or more images to influence resolution, frame rate or aspect ratio
Abstract
The present invention relates to a kind of panoramic image synthesis method and system, method is comprising steps of obtain first depth of field, second depth of field of the second image to be synthesized of the first image to be synthesized；The size for comparing first depth of field Yu second depth of field carries out stretching to the described second image to be synthesized according to comparison result；Image synthesis is carried out in conjunction with the described second image to be synthesized after the described first image to be synthesized and progress stretching.Using the solution of the present invention, it is possible to reduce the sawtooth of subject image distortion and stitching portion in the splicing of panoramic picture.
Description
Technical field
The present invention relates to technical field of image processing, more particularly to a kind of panoramic image synthesis method and system.
Background technique
With the development of science and technology, the function of the terminals such as smart phone, tablet computer, camera also obtain it is continuous perfect.Example
Such as, smart phone can also have independent operating system, independent running space can be by user as PC
The voluntarily application program that installation third service provider provides, since smart phone function is stronger and stronger, the application of people is not
It is only limitted to information of conversing or send, can also be taken pictures using smart phone.
Currently, most of mobile phone all has this function of pan-shot, pan-shot is constantly to obtain in shooting process
Present image is taken, is then combined acquired image by way of image mosaic, to obtain high-resolution image.
In order to guarantee the effect of pan-shot, user's steady cell phone in the horizontal direction is required in shooting process, however,
Since mobile phone can cause to move in the front-back direction because of handshaking or other reasons during taking pictures, the panoramic picture finally synthesized
In object (or referred to as scenery) be easily distorted, and often there is sawtooth in stitching portion, so that the object in panoramic picture
Continuity it is poor, influence imaging effect.
Summary of the invention
The purpose of the present invention is to provide a kind of panoramic image synthesis method and systems, it is possible to reduce the splicing of panoramic picture
The sawtooth of subject image distortion and stitching portion in the process.
The purpose of the present invention is achieved through the following technical solutions:
A kind of panoramic image synthesis method, includes the following steps:
Obtain first depth of field of the first image to be synthesized, second depth of field of the second image to be synthesized；
The size for comparing first depth of field Yu second depth of field, according to comparison result to the described second image to be synthesized
Carry out stretching；
Image is carried out in conjunction with the described second image to be synthesized after the described first image to be synthesized and progress stretching
Synthesis.
It is above-mentioned in one of the embodiments, that stretching is carried out to the described second image to be synthesized according to comparison result
Process include the following steps:
The comparison result be second depth of field be less than first depth of field when, to the described second image to be synthesized into
Row reduces transformation；
The comparison result be second depth of field be greater than first depth of field when, to the described second image to be synthesized into
Row stretching conversion.
It is above-mentioned in one of the embodiments, that stretching is carried out to the described second image to be synthesized according to comparison result
Process include the following steps:
According to the corresponding relationship of the preset depth of field and subject image size, the first object corresponding with first depth of field is obtained
Body picture size, the second subject image size corresponding with second depth of field；
Stretching degree is determined in conjunction with the first subject image size, the second subject image size；
Stretching is carried out to the described second image to be synthesized according to the stretching degree.
First image to be synthesized described in above-mentioned combination and the institute after progress stretching in one of the embodiments,
The process for stating the second image progress image synthesis to be synthesized includes the following steps:
Pixel cutting or pixel filling are carried out to the described second image to be synthesized after progress stretching, by institute
It states the first image to be synthesized and carries out pixel cutting or filled second image to be synthesized of pixel and carry out figure
As synthesis.
The described second image to be synthesized after the above-mentioned stretching to progress carries out pixel in one of the embodiments,
Point is cut or the process of pixel filling includes the following steps:
If the stretching is stretching conversion, by the described second image to be synthesized after stretching conversion relative to stretching
The pixel for the marginal portion that the described second image to be synthesized before transformation has more crops；
It is transformed described relative to reducing with the described first image to be synthesized if the stretching is to reduce transformation
The pixel for the marginal portion that second image to be synthesized has more is filled the corresponding position of the described second image to be synthesized.
A kind of panoramic picture synthesis system, comprising:
Module is obtained, for obtaining first depth of field of the first image to be synthesized, second depth of field of the second image to be synthesized；
Conversion module, for the size of first depth of field and second depth of field, according to comparison result to described
Second image to be synthesized carries out stretching；
Synthesis module, for be synthesized in conjunction with described second after the described first image to be synthesized and progress stretching
Image carries out image synthesis.
Above-mentioned conversion module is described in second depth of field is less than in the comparison result in one of the embodiments,
When first depth of field, diminution transformation is carried out to the described second image to be synthesized, is that second depth of field is greater than in the comparison result
When first depth of field, stretching conversion is carried out to the described second image to be synthesized.
Above-mentioned conversion module is closed according to the preset depth of field is corresponding with subject image size in one of the embodiments,
System, obtains and the corresponding first subject image size of first depth of field, the second subject image corresponding with second depth of field
Size determines stretching degree in conjunction with the first subject image size, the second subject image size, according to described flexible
Transformation degree carries out stretching to the described second image to be synthesized.
Above-mentioned synthesis module is to the described second image to be synthesized after carrying out stretching in one of the embodiments,
Carrying out pixel cutting, perhaps the described first image to be synthesized and progress pixel cutting or pixel are filled out in pixel filling
The described second image to be synthesized after filling is synthesized with image is carried out.
Above-mentioned synthesis module becomes when the stretching is stretching conversion by stretching in one of the embodiments,
The marginal portion that the described second image to be synthesized after changing has more relative to the described second image to be synthesized before stretching conversion
Pixel crops, when the stretching is to reduce transformation, after being converted with the described first image to be synthesized relative to diminution
The pixel of marginal portion that has more of the described second image to be synthesized the corresponding position of described second image to be synthesized is carried out
Filling.
It is first depth of field for obtaining the first image to be synthesized, the second image to be synthesized according to the scheme of aforementioned present invention
Second depth of field, the size of first depth of field and second depth of field is to be synthesized to described second according to comparison result
Image carries out stretching, in conjunction with the described second image to be synthesized after the described first image to be synthesized and progress stretching
Image synthesis is carried out, this scheme is used in the image procossing of pan-shot, it can be during image mosaic according to the depth of field
Variation is to do certain adjustment to the article size in image, to guarantee size of the same object in shooting process in image
Unanimously, it is possible to reduce the sawtooth of subject image distortion and stitching portion in splicing.
Detailed description of the invention
Fig. 1 is that capture apparatus occurs to be moved forward and backward captured panorama sketch out in pan-shot；
Fig. 2 is the flow diagram of the embodiment of panoramic image synthesis method of the invention；
Fig. 3 is the refinement process signal that stretching is carried out to the described second image to be synthesized in one embodiment
Figure；
Fig. 4 is a schematic diagram of the marginal portion in embodiment；
Fig. 5 is another schematic diagram of the marginal portion in embodiment；
Fig. 6 is the structural schematic diagram of the embodiment of panoramic picture synthesis system of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, with reference to the accompanying drawings and embodiments, to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
And the scope of protection of the present invention is not limited.
Scheme to facilitate the understanding of the present invention first says problem of the existing technology and producing cause
It is bright.Capture apparatus is moved forward and backward, and the depth of field of object changes, then the size that object shows in the picture also becomes
Change, therefore since objects in images is not of uniform size when splicing, so as to cause distortion and sawtooth, as shown in Figure 1, to clap
It takes the photograph equipment to occur to be moved forward and backward captured panorama sketch out in certain pan-shot, it is seen then that captured panorama sketch out occurs
Distortion and sawtooth.The size of objects in images is inversely proportional with depth of field size namely the depth of field is bigger, and objects in images is smaller, instead
It is bigger.Present invention explanation is illustrated below.
In the following description, it is illustrated first against the embodiment of panoramic image synthesis method of the invention, then to this
Each embodiment of the panoramic picture synthesis system of invention is illustrated.
It is shown in Figure 2, it is the flow diagram of the embodiment of panoramic image synthesis method of the invention.As shown in Fig. 2,
Panoramic image synthesis method in the present embodiment includes the following steps:
Step S101: first depth of field, second depth of field of second image to be synthesized of the first image to be synthesized are obtained；
Here, the described first image to be synthesized, second image to be synthesized are two frame figures captured in pan-shot
Picture, generally, first image to be synthesized, the image that second image to be synthesized is adjacent two frame, for example, described second
Image to be synthesized is present image (i.e. the frame image of current shooting out), and first image to be synthesized is the current figure
The previous frame image of picture；
Specifically, range finding device can be focused using the binocular camera or laser of filming apparatus and obtains first scape
Deep, described second depth of field, but acquisition first depth of field, the mode of second depth of field are also not necessarily limited to both modes；
Step S102: the size of first depth of field and second depth of field, according to comparison result to described second
Image to be synthesized carries out stretching；
It specifically, is described second in the comparison result of first depth of field and the size of second depth of field
When the depth of field is less than first depth of field, diminution transformation is carried out to the described second image to be synthesized, in first scape
When the comparison result of the deep size with second depth of field is that second depth of field is greater than first depth of field, to described second to
Composograph carries out stretching conversion, and the comparison result in first depth of field and the size of second depth of field is
When second depth of field is equal to first depth of field, then do not need to carry out (the diminution of any form to the described second image to be synthesized
Or stretch) stretching, and adopting is the image for directly carrying out the described first image to be synthesized Yu the described second image to be synthesized
Synthesis；
In addition, in order to determine the scale for carrying out stretching, in one of the embodiments, as shown in figure 3, the basis
The process that comparison result carries out stretching to the described second image to be synthesized may include steps of:
Step S201: it according to the corresponding relationship of the preset depth of field and subject image size, obtains and first depth of field pair
The first subject image size, the second subject image size corresponding with second depth of field answered；
Wherein, the acquisition modes of the corresponding relationship of the depth of field and subject image size may is that the same object in difference
Subject image size under the depth of field is largely tested, and the letter of the depth of field Yu subject image size is then obtained by way of fitting
Number relationship, the functional relation are the corresponding relationship of the depth of field and subject image size in the present embodiment；
Here, the subject image size can be the one-dimensional dimension information of subject image, for example, length, height, width
Degree, is also possible to the two-dimensional size information of subject image, but in order to reduce calculation amount, be generally preferred with one-dimensional dimension information；
Step S202: stretching degree is determined in conjunction with the first subject image size, the second subject image size；
Here, what stretching degree reacted is the ratio value of the image and flexible just preceding image after stretching, both may be used
It also may include reducing change degree to include stretching conversion degree；
Specifically, it can use the ratio of the second subject image size and the first subject image size described in
Stretching degree；
Step S203: stretching is carried out to the described second image to be synthesized according to the stretching degree；
Carrying out stretching to the described second image to be synthesized can be carried out by the way of it arbitrarily may be implemented, herein not
It gives and repeating；
Step S103: in conjunction with the described second image to be synthesized after the described first image to be synthesized and progress stretching
Carry out image synthesis；
In view of the described second image to be synthesized and the standard drawing of generation during pan-shot after progress stretching
Picture it is not of uniform size, it is therefore desirable to cutting and filling appropriate are done to the described second image to be synthesized after stretching,
To guarantee the consistency of image size；For this purpose, in one of the embodiments, the first image to be synthesized described in the combination and
The process that the described second image to be synthesized after carrying out stretching carries out image synthesis may include steps of: to stretching
Transformed second image to be synthesized that contracts carries out pixel cutting or pixel filling, by the described first image to be synthesized
It is synthesized with pixel cutting or filled second image to be synthesized of pixel is carried out with image is carried out；
Specifically, if the stretching is stretching conversion, by the described second image phase to be synthesized after stretching conversion
The pixel for the marginal portion that the described second image to be synthesized before stretching conversion has more is cropped, as shown in figure 4, rectangle
ABCD indicates the described second image to be synthesized before stretching conversion, and described second after rectangle EFGH expression stretching conversion is to be synthesized
Image, the region of Fig. 4 acceptance of the bid oblique line are the described second image to be synthesized after stretching conversion relative to the institute before stretching conversion
The marginal portion that the second image to be synthesized has more is stated,
It is transformed described relative to reducing with the described first image to be synthesized if the stretching is to reduce transformation
The pixel for the marginal portion that second image to be synthesized has more is filled the corresponding position of the described second image to be synthesized；Such as
Shown in Fig. 5, rectangle MNOP indicates to reduce transformed second image to be synthesized, and rectangle IJKL indicates that described first is to be synthesized
Image, Fig. 5 get the bid hatched example areas, that is, first image to be synthesized relative to transformed second image to be synthesized of diminution
The marginal portion having more.
It accordingly, is first depth of field for obtaining the first image to be synthesized, second to be synthesized according to the scheme of above-described embodiment
Second depth of field of image, the size of first depth of field and second depth of field, according to comparison result to described second to
Composograph carries out stretching, to be synthesized in conjunction with described second after the described first image to be synthesized and progress stretching
Image carry out image synthesis, this scheme is used in the image procossing of pan-shot, can during image mosaic according to
The depth of field changes to do certain adjustment to the article size in image, to guarantee same object in shooting process in image
It is in the same size, it is possible to reduce the sawtooth of subject image distortion and stitching portion in splicing.
It should be noted that in an embodiment of the present invention, term " first ", " second " are used for description purposes only, without
It can be interpreted as indicating or implying relative importance.
According to the panoramic image synthesis method of aforementioned present invention, the present invention also provides a kind of panoramic picture synthesis system, with
The embodiment of lower just panoramic picture synthesis system of the invention is described in detail.Panoramic picture of the invention is shown in Fig. 6
The structural schematic diagram of the embodiment of synthesis system.For ease of description, part related to the present invention is merely illustrated in Fig. 6.
As shown in fig. 6, a kind of panoramic picture synthesis system comprising obtain module 301, conversion module 302, synthesis module
303, in which:
Module 301 is obtained, for obtaining first depth of field of the first image to be synthesized, the second scape of the second image to be synthesized
It is deep；
Conversion module 302, for the size of first depth of field and second depth of field, according to comparison result to institute
It states the second image to be synthesized and carries out stretching；
Synthesis module 303, in conjunction with the described first image to be synthesized and carry out stretching after described second to
Composograph carries out image synthesis.
Conversion module 302 can be less than institute in the comparison result for second depth of field in one of the embodiments,
When stating first depth of field, diminution transformation is carried out to the described second image to be synthesized, is that second depth of field is big in the comparison result
When first depth of field, stretching conversion is carried out to the described second image to be synthesized.
Conversion module 302 can be corresponding with subject image size according to the preset depth of field in one of the embodiments,
Relationship, obtains and the corresponding first subject image size of first depth of field, the second object figure corresponding with second depth of field
As size, stretching degree is determined in conjunction with the first subject image size, the second subject image size, is stretched according to described
The transformation degree that contracts carries out stretching to the described second image to be synthesized.
Synthesis module 303 can be to the described second figure to be synthesized after progress stretching in one of the embodiments,
As carrying out pixel cutting, perhaps pixel fills the described first image to be synthesized and carries out pixel cutting or pixel
Filled second image to be synthesized is synthesized with image is carried out.
Synthesis module 303 can become when the stretching is stretching conversion by stretching in one of the embodiments,
The marginal portion that the described second image to be synthesized after changing has more relative to the described second image to be synthesized before stretching conversion
Pixel crops, when the stretching is to reduce transformation, after being converted with the described first image to be synthesized relative to diminution
The pixel of marginal portion that has more of the described second image to be synthesized the corresponding position of described second image to be synthesized is carried out
Filling.
Panoramic picture synthesis system of the invention and panoramic image synthesis method of the invention correspond, in above-mentioned panorama
Technical characteristic and its advantages that the embodiment of image composition method illustrates are suitable for the implementation of panoramic picture synthesis system
In example, hereby give notice that.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of panoramic image synthesis method, which comprises the steps of:
Obtain first depth of field of the first image to be synthesized, second depth of field of the second image to be synthesized, wherein described first is to be synthesized
Image, second image to be synthesized are two field pictures captured in pan-shot；
The size for comparing first depth of field Yu second depth of field carries out the described second image to be synthesized according to comparison result
Stretching, wherein to be synthesized to described second when the comparison result is that second depth of field is less than first depth of field
Image carries out diminution transformation, the comparison result be second depth of field be greater than first depth of field when, to described second to
Composograph carries out stretching conversion；
Image synthesis is carried out in conjunction with the described second image to be synthesized after the described first image to be synthesized and progress stretching.
2. panoramic image synthesis method according to claim 1, which is characterized in that it is described according to comparison result to described
The process that two images to be synthesized carry out stretching includes the following steps:
According to the corresponding relationship of the preset depth of field and subject image size, the first object figure corresponding with first depth of field is obtained
As size, the second subject image size corresponding with second depth of field；
Stretching degree is determined in conjunction with the first subject image size, the second subject image size；
Stretching is carried out to the described second image to be synthesized according to the stretching degree.
3. panoramic image synthesis method according to claim 1, which is characterized in that the first figure to be synthesized described in the combination
Picture and the process for carrying out the described second image progress image synthesis to be synthesized after stretching include the following steps:
Pixel cutting or pixel filling are carried out to the described second image to be synthesized after stretching is carried out, by described the
One image to be synthesized and progress pixel cutting or filled second image to be synthesized of pixel and progress image conjunction
At.
4. panoramic image synthesis method according to claim 3, which is characterized in that the described pair of institute carried out after stretching
The process for stating the second image progress pixel cutting or pixel filling to be synthesized includes the following steps:
If the stretching is stretching conversion, by the described second image to be synthesized after stretching conversion relative to stretching conversion
The pixel for the marginal portion that the described second preceding image to be synthesized has more crops；
If the stretching is to reduce transformation, with the described first image to be synthesized relative to diminution transformed described second
The pixel for the marginal portion that image to be synthesized has more is filled the corresponding position of the described second image to be synthesized.
5. a kind of panoramic picture synthesis system characterized by comprising
Module is obtained, for obtaining first depth of field of the first image to be synthesized, second depth of field of the second image to be synthesized, wherein
First image to be synthesized, second image to be synthesized are two field pictures captured in pan-shot；
Conversion module, for the size of first depth of field and second depth of field, according to comparison result to described second
Image to be synthesized carries out stretching, wherein right when the comparison result is that second depth of field is less than first depth of field
Second image to be synthesized carries out diminution transformation, is that second depth of field is greater than first depth of field in the comparison result
When, stretching conversion is carried out to the described second image to be synthesized；
Synthesis module, in conjunction with the described second image to be synthesized after the described first image to be synthesized and progress stretching
Carry out image synthesis.
6. panoramic picture synthesis system according to claim 5, it is characterised in that:
The conversion module obtains corresponding with first depth of field according to the corresponding relationship of the preset depth of field and subject image size
The first subject image size, the second subject image size corresponding with second depth of field, in conjunction with first subject image
Size, the second subject image size determine stretching degree, according to the stretching degree to the described second figure to be synthesized
As carrying out stretching.
7. panoramic picture synthesis system according to claim 5, it is characterised in that:
The synthesis module carries out pixel cutting or pixel to the described second image to be synthesized after carrying out stretching
Filling by the described first image to be synthesized and carries out pixel cutting or filled second image to be synthesized of pixel
It is synthesized with image is carried out.
8. panoramic picture synthesis system according to claim 7, it is characterised in that:
The synthesis module is when the stretching is stretching conversion, by the described second image phase to be synthesized after stretching conversion
The pixel for the marginal portion that the described second image to be synthesized before stretching conversion has more is cropped, in the stretching
When to reduce transformation, with the described first image to be synthesized relative to the side for reducing transformed second image to be synthesized and having more
The pixel of edge point is filled the corresponding position of the described second image to be synthesized.
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| CN106651755A (en) * | 2016-11-17 | 2017-05-10 | 宇龙计算机通信科技(深圳)有限公司 | Panoramic image processing method and device for terminal and terminal |
| CN106803883B (en) * | 2017-02-28 | 2019-08-30 | 努比亚技术有限公司 | The prompt terminal and method that the depth of field is moved forward and backward in pan-shot |
| CN106954020B (en) * | 2017-02-28 | 2019-10-15 | 努比亚技术有限公司 | A kind of image processing method and terminal |
| CN107248141B (en) * | 2017-04-28 | 2021-01-05 | 努比亚技术有限公司 | Image editing method and device and computer readable storage medium |
| CN107493412B (en) * | 2017-08-09 | 2019-09-13 | Oppo广东移动通信有限公司 | Image processing system and method |
| CN107370951B (en) * | 2017-08-09 | 2019-12-27 | Oppo广东移动通信有限公司 | Image processing system and method |
| CN107395974B (en) * | 2017-08-09 | 2019-09-13 | Oppo广东移动通信有限公司 | Image processing system and method |
| CN107493411B (en) * | 2017-08-09 | 2019-09-13 | Oppo广东移动通信有限公司 | Image processing system and method |
| CN108259740A (en) * | 2017-12-29 | 2018-07-06 | 维沃移动通信有限公司 | A kind of method, apparatus and mobile terminal of panoramic picture generation |
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