CN105791796A - Image processing method and image processing apparatus - Google Patents
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Abstract
The embodiment of the invention provides an image processing method and an image processing apparatus, which are applied to an electronic device, the electronic device is configured to display and process an image, the electronic device comprises a first image collection apparatus, and the image processing method provided by the invention comprises the steps of shooting a first image of a scene by the image collection apparatus, wherein the first image contains image depth information; obtaining the image depth information of the first image; obtaining foreground information of the first image by the image depth information; and fusing the second image with the foreground information of the first image as a background image to generate a third image. Therefore, a user can conveniently change different background images in different environments, and various demands of the user are satisfied.
Description
Technical field
The present invention relates to a kind of image processing method being applied in electronic equipment and corresponding image processing apparatus.
Background technology
Along with the development of mechanics of communication, video communication technology has obtained relatively broad utilization, for instance, visual telephone, video conference etc..In traditional video communication technology, background frame is usually the shooting to real scene, but, single background image often makes user feel exhausted and lacks new meaning, and user expects the chat background that in different environments, can use different sensation；Or, for the requirement of secrecy, user is often open without wishing to oneself real background frame, therefore, how to realize the replacing of background in three-dimensional video-frequency technology, is three-dimensional video-frequency communications field problem in the urgent need to address.It addition, existing apparatus for video communication cost is high, volume is relatively big, is not easy to daily carry and use, and people in the industry is look for a kind of low cost, the implementation of simple and practical three-dimensional video-frequency.
Summary of the invention
The purpose of the embodiment of the present invention is in that to provide a kind of image processing method being applied to electronic equipment and image processing apparatus, to solve above-mentioned technical problem.
Embodiments provide a kind of image processing method, it is applied to electronic equipment, electronic equipment is configured to image be displayed and processes, electronic equipment includes the first image collecting device, image processing method includes: utilizes image collecting device to absorb the first image of a scene, comprises image depth information in the first image；Obtain the image depth information of the first image；Image depth information is utilized to obtain the foreground information of the first image；The foreground information using the second image image as a setting and the first image blends to generate the 3rd image.
Another embodiment of the present invention provides a kind of image processing apparatus, it is applied to electronic equipment, electronic equipment is configured to image be displayed and processes, electronic equipment includes the first image collecting device, it is characterized in that, image processing apparatus comprises the following steps: the first image acquisition unit, for utilizing image collecting device to absorb the first image of a scene, comprises image depth information in the first image；Image depth information acquiring unit, for obtaining the image depth information of the first image；Foreground information acquiring unit, for utilizing image depth information to obtain the foreground information of the first image；Image co-registration unit, for using the foreground information of the second image image as a setting and the first image to blend to generate the 3rd image.
By the scheme that the invention described above embodiment provides, it is possible to achieve low cost, simple and practical real time imaging background is replaced.It addition, the scheme provided by the invention described above embodiment, user can change different background images easily in different environments, meets user's each side demand.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in the description to embodiment is briefly described.Accompanying drawing in the following describes is only the exemplary embodiment of the present invention.
Fig. 1 describes image processing method flow chart according to an embodiment of the invention.
Fig. 2 depicts the image processing method flow chart of an alternative embodiment of the invention.
Fig. 3 is image processing apparatus according to embodiments of the present invention.
Fig. 4 is image processing apparatus according to another embodiment of the present invention.
Detailed description of the invention
Hereinafter, by preferred embodiments of the present invention will be described in detail with reference to the annexed drawings.Note in the present description and drawings, there is substantially the same step and element is denoted by the same reference numerals, and the repetition of explanation of these steps and element will be omitted.
In following example of the present invention, electronic equipment refers to the equipment that can communicate with other equipment.The concrete form of electronic equipment includes but not limited to mobile phone, personal computer, digital camera, personal digital assistant, portable computer, game machine etc..This electronic equipment can be configured to image be displayed and processes, for instance, image can display in this electronic equipment, the image of display can be stored by electronic equipment, contours extract, identification, segmentation, cutting, the various process such as fusion.This electronic equipment includes the first image collecting device, this image collecting device can gather image, such as, the first image collecting device can be one or more in the devices such as photographic head, photographing unit, video camera, it is possible to gathers a sub-picture or gathers multiple image simultaneously.An example according to the present invention, the first image collecting device can be the stereoscopic camera of such as binocular camera, and this stereoscopic camera can obtain the steric information of captured scene while taking pictures.
Fig. 1 describes the flow chart of image processing method 100 according to an embodiment of the invention.The image processing method of one embodiment of the present of invention is described below with reference to Fig. 1.Image processing method 100 can apply to above-mentioned electronic equipment.As it is shown in figure 1, in step S101, utilize image collecting device to absorb the first image of a scene, the first image comprise image depth information.Such as, a photographic head can be used in different angles, one scene to be carried out image capture respectively, a binocular camera can also be used in different angles, this scene to be carried out image capture at synchronization, different objects in this scene is different due to the distance of distance photographic head, therefore has different depth informations.
In step s 102, the image depth information of the first image is obtained.An example according to the present invention, binocular camera is used at synchronization, one scene to be shot, obtain two width images of this scene, by a wherein width figure as the first image, using another width figure as assistant images, assistant images and the first image is used to contrast, to obtain the depth information of each pixel in the first image.Matching efficiency can be accelerated, strengthen the robustness of matching algorithm, it is possible to the multiple regions the first image and assistant images being divided into, each region in the first image is corresponding with each region in assistant images respectively.Then, in units of described corresponding region, the pixel in the first image is mated with the pixel in assistant images.Such as, first the position in the first image of a point in the first image is determined, then according to profile and/or the parameter such as picture material and/or/pixel value, find the corresponding region in assistant images, and find the pixel with identical parameters in this region, such as in the corresponding region of assistant images, relevant information according to this pixel scans for, to be quickly found out corresponding pixel points.Afterwards, according to the position relationship of corresponding pixel points in the first image and assistant images, utilize depth computing method well-known to those skilled in the art, calculate the depth information of each pixel in the first image.
In step s 103, image depth information is utilized to obtain the foreground information of the first image.For example, it is possible to arrange the depth threshold of a foreground information and background information separation, the depth information of each pixel and this depth threshold are compared, when the depth information of pixel is less than depth threshold, then this pixel is defined as foreground information；And when the depth information of pixel is more than depth threshold, then this pixel is defined as background information.
In step S104, the foreground information of the second image image as a setting and the first image is used to blend to generate the 3rd image.When determine according to depth threshold the foreground area formed as the pixel of foreground information in the first image and as a setting information pixel composition background area after, the image-region belonging to background information and the region segmentation being determined to belong to foreground information can be will determine as open, then, use the background image that user wants to merge as the second image and foreground area, generate and achieve the 3rd image that background is replaced.Such as, redundant data between foreground area and second image of the first image is processed to improve the reliability of the 3rd image generated, by the process of the complementary information between the foreground area of the first image and the second image being improved the definition of the 3rd image.
According in the image processing method of the present embodiment, by the prospect of Depth Information Acquistion image and background area, and foreground area and the desired background image of user are blended, it is possible to replace different background according to varying environment easily, meet the demand of user.
In addition, another example according to the present invention, above-mentioned electronic equipment is except the first image collecting device, also include the second image collecting device, second image collecting device and the first image collecting device lay respectively at the both sides of described electronic equipment, user can utilize the second image collecting device picked-up image as the second image easily, then by according to extraction of depth information to the second image of absorbing of foreground information and the second image collecting device blend, generate new image.So, user can utilize the electronic equipment with multiple photographic head to shoot multiple photo respectively, and carries out background replacement in real time according to personal like, convenient for users to use, also enriches the function of electronic equipment.
Fig. 2 depicts the image processing method flow chart of an alternative embodiment of the invention.The image processing method of another embodiment of the present invention is described below with reference to Fig. 2.Image processing method 200 can apply to above-mentioned electronic equipment, and electronic equipment can show and process image information.Some step of image processing method 200 is similar with the step of image processing method 100, such as, in step s 201, image collecting device is utilized to absorb the first image of a scene, first image comprises image depth information, in step S205, described image depth information is utilized to obtain the foreground information of described first image.In step S206, the foreground information of the second image image as a setting and the first image is used to blend to generate the 3rd image.Succinct for description, repeats no more again.
Difference below for image processing method 200 with image processing method 100 carries out describing emphatically.In step S202, the first image is carried out image recognition, to determine main information district and the non-principal information area of the first image.Such as, being blue sky at a distance, be face information nearby in the first image, owing to the distance in blue sky, face camera distance camera lens is different, therefore its depth information is significantly different.Face information as close shot can as main information district, and the Forescape Information as blue sky can as the non-principal information area.Carry out image segmentation after first image is carried out image recognition, Forescape Information is separated with close shot information area.In step S203, the first depth calculation is performed to obtain depth information for main information district, for instance, use similar triangles algorithm, error back propagation method etc. to carry out depth calculation；In step S204, the second depth calculation is performed to obtain depth information for the non-principal information area, for instance, if the image-region such as blue sky, white clouds, it is possible to directly arranging its depth information is infinity.
Another example according to the present invention, contours extract can be passed through the approximate region of face identified in advance, then when extracting the foreground information of image, region beyond human face region can be calculated image depth information and carry out foreground extraction, afterwards, the foreground information of acquisition is combined with the human face region identified, obtains foreground information expeditiously.Furthermore it is also possible to the face approximate region identified in advance is carried out depth calculation, it is accurately determined human face region, using this human face region part as foreground information, improves the efficiency that foreground information obtains.
According in the image processing method of the present embodiment, by predefined main information district and the non-principal information area, zones of different is carried out different degree of depth algorithms, main information region is adopted complicated depth computing method, non-principal information area can be adopted simple depth calculation algorithm, thus being effectively increased the efficiency of depth calculation.
Fig. 3 is image processing apparatus according to embodiments of the present invention.Below, the image processing apparatus of embodiments of the invention is described with reference to Fig. 3, this image processing apparatus is applied to above-mentioned electronic equipment, electronic equipment is configured to image be displayed and processes, this electronic equipment includes the first image collecting device, and image processing apparatus 300 includes: the first image acquisition unit 310, image depth information acquiring unit 320, foreground information acquiring unit 330, image co-registration unit 340.Above-mentioned first image acquisition unit 310, image depth information acquiring unit 320, foreground information acquiring unit 330, image co-registration unit 340 can be physically independent hardware componenies, it can also be the processor of above-mentioned electronic equipment, such as, realized by central processing unit.
The modules of image processing apparatus 300 performs each step/function of the image processing method in above-mentioned Fig. 1, therefore, succinct in order to describe, and no longer specifically describes.
Such as, the first image acquisition unit 310, utilize image collecting device to absorb the first image of a scene, the first image comprises image depth information.Such as, a photographic head can be used in different angles, one scene to be carried out image capture respectively, a binocular camera can also be used in different angles, this scene to be carried out image capture at synchronization, different objects in this scene is different due to the distance of distance photographic head, therefore has different depth informations.
Image depth information acquiring unit 320, obtains the image depth information of the first image.An example according to the present invention, binocular camera is used at synchronization, one scene to be shot, obtain two width images of this scene, by a wherein width figure as the first image, using another width figure as assistant images, assistant images and the first image is used to contrast, to obtain the depth information of each pixel in the first image.Matching efficiency can be accelerated, strengthen the robustness of matching algorithm, it is possible to the multiple regions the first image and assistant images being divided into, each region in the first image is corresponding with each region in assistant images respectively.Then, in units of described corresponding region, the pixel in the first image is mated with the pixel in assistant images.Such as, first the position in the first image of a point in the first image is determined, then according to profile and/or the parameter such as picture material and/or/pixel value, find the corresponding region in assistant images, and find the pixel with identical parameters in this region, such as in the corresponding region of assistant images, relevant information according to this pixel scans for, to be quickly found out corresponding pixel points.Afterwards, according to the position relationship of corresponding pixel points in the first image and assistant images, utilize depth computing method well-known to those skilled in the art, calculate the depth information of each pixel in the first image.
Foreground information acquiring unit 330, utilizes image depth information to obtain the foreground information of the first image.For example, it is possible to arrange the depth threshold of a foreground information and background information separation, the depth information of each pixel and this depth threshold are compared, when the depth information of pixel is less than depth threshold, then this pixel is defined as foreground information；And when the depth information of pixel is more than depth threshold, then this pixel is defined as background information.
Image co-registration unit 340, uses the foreground information of the second image image as a setting and the first image to blend to generate the 3rd image.When determine according to depth threshold the foreground area formed as the pixel of foreground information in the first image and as a setting information pixel composition background area after, the image-region belonging to background information and the region segmentation being determined to belong to foreground information can be will determine as open, then, use the background image that user wants to merge as the second image and foreground area, generate and achieve the 3rd image that background is replaced.Such as, redundant data between foreground area and second image of the first image is processed to improve the reliability of the 3rd image generated, by the process of the complementary information between the foreground area of the first image and the second image being improved the definition of the 3rd image.
According in the image processing method of the present embodiment, by the prospect of Depth Information Acquistion image and background area, and foreground area and the desired background image of user are blended, it is possible to replace different background according to varying environment easily, meet the demand of user.
In addition, another example according to the present invention, above-mentioned electronic equipment is except the first image collecting device, also include the second image collecting device, second image collecting device and the first image collecting device lay respectively at the both sides of described electronic equipment, second image acquisition unit utilizes the second image collecting device picked-up image as the second image, then by according to extraction of depth information to the second image of absorbing of foreground information and the second image collecting device blend, generate new image.So, user can utilize the electronic equipment with multiple photographic head to shoot multiple photo respectively, and carries out background replacement in real time according to personal like, convenient for users to use, also enriches the function of electronic equipment.
Fig. 4 is image processing apparatus according to another embodiment of the present invention.Below, the image processing apparatus of the embodiment of the present invention is described with reference to Fig. 4.As shown in Figure 4, the image processing apparatus 400 of the embodiment of the present invention includes: the first image acquisition unit 410, recognition unit 420, the first Depth Information Acquistion unit 430, the second Depth Information Acquistion list 440, foreground information acquiring unit 450, image co-registration unit 460.The modules of image processing apparatus 400 performs each step/function of the image processing method in above-mentioned Fig. 2, therefore, succinct in order to describe, and no longer specifically describes.
Image processing apparatus 400 can apply to above-mentioned electronic equipment, and electronic equipment can show and process image information.Some functional module of image processing apparatus 400 is similar with the functional module of image processing apparatus 200, for instance, the first image acquisition unit 410, utilize image collecting device to absorb the first image of a scene, the first image comprises image depth information；Foreground information acquiring unit 450, utilizes described image depth information to obtain the foreground information of described first image.Image co-registration unit 460, uses the foreground information of the second image image as a setting and the first image to blend to generate the 3rd image.Succinct for description, repeats no more again.
Difference below for image processing apparatus 400 with image processing apparatus 300 carries out describing emphatically.Recognition unit 420, carries out image recognition to the first image, to determine main information district and the non-principal information area of the first image.Such as, being blue sky at a distance, be face information nearby in the first image, owing to the distance in blue sky, face camera distance camera lens is different, therefore its depth information is significantly different.Face information as close shot can as main information district, and the Forescape Information as blue sky can as the non-principal information area.Carry out image segmentation after first image is carried out image recognition, Forescape Information is separated with close shot information area.First Depth Information Acquistion unit 430, performs the first depth calculation to obtain depth information for main information district, for instance, use similar triangles algorithm, error back propagation method etc. to carry out depth calculation；Second Depth Information Acquistion list 440, performs the second depth calculation to obtain depth information for the non-principal information area, for instance, if the image-region such as blue sky, white clouds, it is possible to directly arranging its depth information is infinity.
Another example according to the present invention, first image acquisition unit 410 also includes human face region recognition unit, contours extract can be passed through the approximate region of face identified in advance, then when extracting the foreground information of image, region beyond human face region can be calculated image depth information and carry out foreground extraction by the second Depth Information Acquistion list 440 and foreground information acquiring unit 450, afterwards, the foreground information of acquisition is combined with the human face region identified, obtain foreground information expeditiously.Alternatively, in order to improve the efficiency that foreground information obtains, the face approximate region identified in advance can also be carried out depth calculation by the first Depth Information Acquistion unit 430, is accurately determined human face region, using this human face region part as foreground information.
According in the image processing apparatus of the present embodiment, by predefined main information district and the non-principal information area, zones of different is carried out different degree of depth algorithms, main information region is adopted complicated depth computing method, non-principal information area can be adopted simple depth calculation algorithm, thus being effectively increased the efficiency of depth calculation.
Those of ordinary skill in the art are it is to be appreciated that the unit of each example that describes in conjunction with the embodiments described herein and algorithm steps, it is possible to electronic hardware, computer software or the two be implemented in combination in.And software module can be placed in any form of computer-readable storage medium.In order to clearly demonstrate the interchangeability of hardware and software, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Those skilled in the art specifically can should be used for using different methods to realize described function to each, but this realization is it is not considered that beyond the scope of this invention.
It should be appreciated by those skilled in the art that can be dependent on design requirement and other factors carries out various amendment, combination, part combination and replace the present invention, as long as they are in the scope of appended claims and equivalent thereof.
Claims (10)
1. an image processing method, is applied to electronic equipment, and described electronic equipment is configured to described image is displayed and processed, and described electronic equipment includes the first image collecting device, it is characterised in that said method comprising the steps of:
Utilize described image collecting device to absorb the first image of a scene, described first image comprises image depth information；
Obtain the image depth information of described first image；
Described image depth information is utilized to obtain the foreground information of described first image；
The foreground information using the second image image as a setting and described first image blends to generate the 3rd image.
2. method according to claim 1, wherein, the step of the image depth information of described first image of described acquisition includes:
Described first image is carried out image recognition, to determine main information district and the non-principal information area of described first image；
First depth calculation is performed to obtain described depth information for described main information district；
Second depth calculation is performed to obtain described depth information for the described non-principal information area.
3. method according to claim 1, wherein, the step of the described foreground information utilizing described image depth information to obtain described first image includes:
The depth threshold judging described foreground information is set；
When the depth value of pixel of described first image is less than described depth threshold, then this pixel is defined as foreground information.
4. method according to claim 1, wherein, described scene includes face；
Utilizing described image collecting device to absorb the first image of a scene, the step comprising image depth information in described first image includes:
It is identified determining the human face region in described first image to described first image；
The step utilizing the foreground information of described image depth information described first image of acquisition includes:
Described image depth information and described human face region is utilized to obtain described foreground information.
5. method according to claim 1, wherein,
Described electronic equipment also includes, the second image collecting device, and described second image collecting device and described first image collecting device lay respectively at the both sides of described electronic equipment；
Described method farther includes:
Utilize described second image collecting device picked-up image as described second image.
6. an image processing apparatus, is applied to electronic equipment, and described electronic equipment is configured to described image is displayed and processed, and described electronic equipment includes the first image collecting device, it is characterised in that described image processing apparatus includes:
First image acquisition unit, for utilizing described image collecting device to absorb the first image of a scene, comprises image depth information in described first image；
Image depth information acquiring unit, for obtaining the image depth information of described first image；
Foreground information acquiring unit, for utilizing described image depth information to obtain the foreground information of described first image；
Image co-registration unit, for using the foreground information of the second image image as a setting and described first image to blend to generate the 3rd image.
7. device according to claim 6, wherein, described image depth information acquiring unit includes:
Recognition unit, for carrying out image recognition to described first image, to determine main information district and the non-principal information area of described first image；
First Depth Information Acquistion unit, for performing the first depth calculation to obtain described depth information for described main information district；
Second Depth Information Acquistion unit, for performing the second depth calculation to obtain described depth information for the described non-principal information area.
8. device according to claim 6, wherein, described foreground information acquiring unit includes:
Depth threshold setup unit, for arranging the depth threshold judging described foreground information；
Foreground information determines unit, for the depth value of pixel when described first image less than described depth threshold, then this pixel is defined as foreground information.
9. device according to claim 6, wherein, described scene includes face；
Described first image acquisition unit includes:
Human face region recognition unit, for being identified determining the human face region in described first image to described first image；
Described foreground information acquiring unit is further used for utilizing described image depth information and described human face region to obtain described foreground information.
10. device according to claim 6, wherein,
Described electronic equipment also includes, the second image collecting device, and described second image collecting device and described first image collecting device lay respectively at the both sides of described electronic equipment；
Described image processing apparatus farther includes:
Second image acquisition unit, is used for utilizing described second image collecting device picked-up image as described second image.
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| CN201410829516.7A CN105791796B (en) | 2014-12-25 | Image processing method and image processing apparatus | |
| US14/658,756 US9607394B2 (en) | 2014-11-20 | 2015-03-16 | Information processing method and electronic device |
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