CN105049728A - Method and device for acquiring shot image - Google Patents
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- CN105049728A CN105049728A CN201510505004.XA CN201510505004A CN105049728A CN 105049728 A CN105049728 A CN 105049728A CN 201510505004 A CN201510505004 A CN 201510505004A CN 105049728 A CN105049728 A CN 105049728A
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Abstract
The embodiment of the invention discloses a method and device for acquiring a shot image. The method comprises the following steps: after a shutter trigger event is detected, acquiring a plurality of currently-stored preview images; and selecting a preview image with highest definition from the plurality of preview images according to a brightness difference value between every pair of adjacent pixel points in a preset area corresponding to each preview image in the plurality of preview images to serve as a target image to be displayed. Through adoption of the technical scheme provided by the embodiment of the invention, the technical problem of display image fuzziness since a preview image captured at a shutter pressing moment is still taken as the target image to be displayed even vibration is generated at a moment when a user presses down the shutter in the prior art is solved; an existing shot image acquisition technology is optimized; and the definition of the shot image is increased.
Description
Technical field
The embodiment of the present invention relates to technical field of data processing, particularly relates to a kind of acquisition methods and device of photographic images.
Background technology
Along with the development of electronic technology, digital photographing equipment (such as, digital camera or have the mobile phone etc. of digital camera head) gos deep into huge numbers of families, becomes the indispensable instrument that everybody records beautiful natural views, data plate life splendid moment.The requirement of user to shooting is also more and more higher, not only needs the speed of shooting fast, but also needs the image of shooting more clear.
Zero propagation snap, in image preview obtained exactly in simple terms, immediate a few two field picture is saved in internal memory in real time, when user presses the moment of shutter, system directly will read this in buffer memory frame image data of capturing instantaneously, form the image finally shown on photographing device, thus realize the ultrafast shooting effect of zero shutter delay.
At present, a lot of digital photographing equipment all have the function of zero propagation snap, for user brings good experience.But, inevitably, user may produce shake in various degree when shooting, if user shakes a little at the moment hand of shooting, so the view data that gets of moment is fuzzy by what have to a certain degree, the view data this moment got is as final photographic images, and that this can be caused to take is not fogging clear, has a strong impact on the experience of user.
Summary of the invention
The embodiment of the present invention provides a kind of acquisition methods and device of photographic images, to optimize the acquiring technology of existing photographic images, improves the definition of photographic images.
In first aspect, embodiments provide a kind of acquisition methods of photographic images, comprising:
After shutter trigger event being detected, obtain several preview images of current storage;
According to the luminance difference of often pair of neighbor pixel in the predeterminable area that width preview image each in several preview images described is corresponding, from several preview images described, select preview image that a width definition is the highest as target image to show.
In second aspect, embodiments provide a kind of acquisition device of photographic images, comprising:
Preview image acquiring unit, for after shutter trigger event being detected, obtains several preview images of current storage;
Target image selection unit, for the luminance difference according to often pair of neighbor pixel in predeterminable area corresponding to width preview image each in several preview images described, from several preview images described, select preview image that a width definition is the highest as target image to show.
The embodiment of the present invention several preview images by storing, the definition of several preview images relatively more described is carried out according to the luminance difference of often pair of neighbor pixel in every width preview image, choose wherein a width the most clearly preview image show as target image, to solve in prior art user and produce shake when pressing shutter moment, the preview image that shutter catches instantaneously will be pressed carry out showing as target image and cause showing image blurring technical problem, optimize the acquiring technology of existing photographic images, improve the definition of photographic images.
Accompanying drawing explanation
Fig. 1 is the flow chart of the acquisition methods of the photographic images that the embodiment of the present invention one provides;
Fig. 2 is the flow chart of the acquisition methods of the photographic images that the embodiment of the present invention two provides;
Fig. 3 is the structural representation of pixel in the preview image that provides of the embodiment of the present invention two;
Fig. 4 is the another structural representation of pixel in the preview image that provides of the embodiment of the present invention two;
Fig. 5 is the structural representation of the acquisition device of the photographic images that the embodiment of the present invention three provides.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the specific embodiment of the invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content.Before in further detail exemplary embodiment being discussed, it should be mentioned that some exemplary embodiments are described as the process or method described as flow chart.Although operations (or step) is described as the process of order by flow chart, many operations wherein can be implemented concurrently, concomitantly or simultaneously.In addition, the order of operations can be rearranged.Described process can be terminated when its operations are completed, but can also have the additional step do not comprised in the accompanying drawings.Described process can correspond to method, function, code, subroutine, subprogram etc.
Embodiment one
Fig. 1 gives the flow chart of the acquisition methods of the photographic images that the embodiment of the present invention one provides, the method of the present embodiment can be performed by the acquisition device of photographic images, this device realizes by the mode of hardware and/or software, and the part that described device can be used as the terminal with camera function is arranged on described terminal inner.
As shown in Figure 1, the acquisition methods of photographic images that the present embodiment provides specifically comprises the following steps:
Step 101, after shutter trigger event being detected, obtain several preview images of current storage.
In the present embodiment, after terminal detects shutter trigger event, obtain several preview images of current storage, wherein, described terminal can be the equipment such as mobile phone, notebook, PAD intelligent terminal, panel computer, digital camera.
Several preview images of described storage are included at least one width preview image that terminal before user presses shutter captures and terminal captures when user presses shutter moment a width preview image.
Step 102, luminance difference according to often pair of neighbor pixel in predeterminable area corresponding to width preview image each in several preview images described, select preview image that a width definition is the highest as target image to show from several preview images described.
The benefit that this step is arranged like this is: because, the luminance difference that there is more neighbor pixel in one highest wisdom photographic images is less, then think that this photographic images is clearly, contrary, if the luminance difference existed in photographic images between more neighbor pixel is larger, then think that this photographic images is fuzzy, so according to the luminance difference of often pair of neighbor pixel in predeterminable area corresponding to width preview image each in preview image, determine the definition of each width preview image, the technique effect determining preview image definition fast and accurately can be reached.
Wherein, described predeterminable area can be view picture preview image region, also can be a certain piece of region in a width preview image, not limit in the present embodiment to this.Preferably, described predeterminable area is focusing area, because, general for a width photographic images, as long as certain region of entire image is fuzzy, then this entire image is also fuzzy, as long as certain region of entire image is clearly, then this entire image is also clearly, so can determine that whether this preview image is clear according to the whether clear of certain block region preset of preview image, and reduce amount of calculation, in addition, adopt focusing area can the brightness value of each pixel in this region of quick obtaining, improve the acquisition speed of the luminance difference of often pair of neighbor pixel in predeterminable area corresponding to each width preview image.
The acquisition methods of the photographic images that the embodiment of the present invention one provides, by several preview images that will store, the definition of several preview images relatively more described is carried out according to the luminance difference of often pair of neighbor pixel in every width preview image, choose wherein a width the most clearly preview image show as target image, to solve in prior art user and produce shake when pressing shutter moment, the preview image that shutter catches instantaneously will be pressed carry out showing as target image and cause showing image blurring technical problem, optimize the acquiring technology of existing photographic images, improve the definition of photographic images.
Embodiment two
Fig. 2 gives the flow chart of the acquisition methods of the photographic images that the embodiment of the present invention two provides.The present embodiment is optimized based on above-described embodiment, in the present embodiment, by the luminance difference according to often pair of neighbor pixel in predeterminable area corresponding to width preview image each in several preview images described, from several preview images described, the highest preview image of a width definition is selected specifically to be optimized for carry out showing as target image: by the every width preview image in several preview images described as present image, order chooses pixel in described present image as current pixel point, calculate the difference of the brightness of described current pixel point and the brightness of adjacent pixel, when described difference is greater than predetermined threshold value, corresponding for present image counter is added one, the value of the relatively described corresponding counter of several preview images, using preview image maximum for the value of counter as target image to show.
Accordingly, the acquisition methods of the photographic images that the present embodiment provides, comprises the following steps:
Step 201, after shutter trigger event being detected, obtain several preview images of current storage.
Step 202, using the every width preview image in several preview images described as present image, order chooses pixel in described present image as current pixel point, calculate the difference of the brightness of described current pixel point and the brightness of adjacent pixel, when described difference is greater than predetermined threshold value, corresponding for present image counter is added one.
In this step, calculate the definition of the every width preview image in several preview images described, described definition is characterized by the value of counter corresponding to preview image, and value this preview image larger of counter is more clear.Wherein, the value of the counter that described preview image is corresponding calculates according to the difference of the brightness of neighbor pixel in all pixels of predeterminable area corresponding in this preview image, when described difference is greater than predetermined threshold value, corresponding for this preview image counter is added one, calculates the value of counter corresponding to each width preview image in the manner described above.
Fig. 3 gives the structural representation of pixel in the preview image that the embodiment of the present invention two provides.As shown in Figure 3, sequentially can choose pixel in this preview image as current pixel point, such as, order selected pixels point 1, pixel 2, pixel 16 is as current pixel point, in this step, described adjacent pixel can be with current pixel point right adjacent right pixel and with adjacent lower pixel under current pixel point, such as, current pixel point is pixel 1, then right pixel is pixel 2, lower pixel is pixel 5, the difference of the brightness of the described current pixel point of described calculating and the brightness of adjacent pixel, when described difference is greater than predetermined threshold value, corresponding for present image counter is added one can comprise:
Calculate the second difference of the brightness of the first difference of the brightness of described current pixel point 1 and the brightness of right pixel 2 and the brightness of described current pixel point 1 and lower pixel 5, when described first difference is greater than predetermined threshold value, corresponding for present image counter is added one, when described second difference is greater than predetermined threshold value, corresponding for present image counter is added one.
After the difference of brightness having calculated pixel 1 and adjacent pixel, pixel 2 is continued calculating pixel point 2 and the difference between right neighbor pixel 3 and lower neighbor pixel 6 as current pixel point, until calculate complete using pixel 16 as current pixel point.It should be noted that, when current pixel point is without right pixel or lower pixel, then without the need to calculating the difference of brightness between current pixel point and right pixel or lower pixel, such as, pixel 4 does not have right pixel to only have lower pixel 8, then the difference of a brightness between calculating pixel point 4 and lower pixel 8.
Fig. 4 gives the another structural representation of pixel in the preview image that the embodiment of the present invention two provides.As shown in Figure 4, in this step, the difference of the brightness of the described current pixel point of described calculating and the brightness of adjacent pixel, when described difference is greater than predetermined threshold value, corresponding for present image counter is added one also specifically can comprise: first choose pixel in this preview image as current pixel point according to row order, calculate the first difference of the brightness of described current pixel point and the brightness of right neighbor pixel, when described first difference is greater than predetermined threshold value, corresponding for present image counter is added one; Pixel in this preview image is chosen as current pixel point again according to row order, calculate the second difference of the brightness of described current pixel point and the brightness of lower adjacent pixel, when described second difference is greater than predetermined threshold value, corresponding for present image counter is added one.
As shown in the figure on Fig. 4 left side, first according to row order respectively selected pixels point 1, pixel 2 ..., pixel 16 is as current pixel point, if current pixel point is 1, then calculate the difference of the brightness between current pixel point 1 and right neighbor pixel 2, if current pixel point is 2, then calculate the difference of the brightness between current pixel point 2 and right neighbor pixel 3, if current pixel point is 5, then calculate the difference of the brightness between current pixel point 5 and right neighbor pixel 6, until calculate complete using pixel 16 as current pixel point.It should be noted that, when current pixel point is without right pixel, then skip this pixel using next pixel as current pixel point, such as, pixel 4 does not have right pixel, then skip the difference of the brightness between pixel 4 calculating pixel point 5 and right pixel 6.
After the first difference of the brightness of the right pixel corresponding with it according to the complete all pixels of row order computation, pixel in this preview image is chosen as current pixel point again according to row order, calculate the second difference of the brightness of described current pixel point and the brightness of lower adjacent pixel, as shown in the figure on the right of Fig. 4, according to row order selected pixels point 1 respectively, pixel 2, pixel 16 is as current pixel point, if current pixel point is 1, then calculate the difference of the brightness between current pixel point 1 and lower neighbor pixel 2, if current pixel point is 2, then calculate the difference of the brightness between current pixel point 2 and lower neighbor pixel 3, if current pixel point is 5, then calculate the difference of the brightness between current pixel point 5 and lower neighbor pixel 6, until pixel 16 is calculated complete as current pixel point.It should be noted that, when current pixel point is without lower pixel, then skip this pixel using next pixel as current pixel point, such as pixel 4 does not descend pixel, then skip the difference of the brightness between pixel 4 calculating pixel point 5 and lower pixel 6.
Wherein, the predetermined threshold value described in the present embodiment can for be more than or equal to 50 candelas/square metre value.
It should be noted that, the pixel region giving the preview image of a 4*4 that Fig. 3 and Fig. 4 is only exemplary, in preview image, the concrete size of predeterminable area is determined by actual conditions.
The value of step 203, the relatively described corresponding counter of several preview images, using preview image maximum for the value of counter as target image to show.
Wherein, the value of counter characterizes the definition of this preview image, using preview image maximum for the value of counter as target image, by the highest preview image of definition as target image.
The acquisition methods of the photographic images that the embodiment of the present invention two provides, by will store several preview images as present image, order chooses pixel in described present image as current pixel point, calculate the difference of the brightness of described current pixel point and the brightness of adjacent pixel, when described difference is greater than predetermined threshold value, corresponding for present image counter is added one, obtain the value of counter corresponding to every width preview image respectively, by the value of the relatively more described corresponding counter of several preview images, using preview image maximum for the value of counter as target image to show, to solve in prior art user and produce shake when pressing shutter moment, the preview image that shutter catches instantaneously will be pressed carry out showing as target image and cause showing image blurring technical problem, optimize the acquiring technology of existing photographic images, improve the definition of photographic images.
Embodiment three
Fig. 5 gives the structural representation of the acquisition device of the photographic images that the embodiment of the present invention three provides.As shown in Figure 5, the acquisition device of photographic images that the present embodiment provides comprises: preview image acquiring unit 51 and target image selection unit 52.Wherein, described preview image acquiring unit 51, for after shutter trigger event being detected, obtains several preview images of current storage; Described target image selection unit 52, for the luminance difference according to often pair of neighbor pixel in predeterminable area corresponding to width preview image each in several preview images described, from several preview images described, select preview image that a width definition is the highest as target image to show.
Further, described target image selection unit 52 comprises:
Counter computation subunit, for using the every width preview image in several preview images described as present image, order chooses pixel in described present image as current pixel point, calculate the difference of the brightness of described current pixel point and the brightness of adjacent pixel, when described difference is greater than predetermined threshold value, corresponding for present image counter is added one;
Target image display subelement, for the value of the relatively described corresponding counter of several preview images, using preview image maximum for the value of counter as target image to show.
Further, described counter computation subunit specifically for:
Calculate the second difference of the brightness of the first difference of the brightness of described current pixel point and the brightness of right pixel and the brightness of described current pixel point and lower pixel, when described first difference is greater than predetermined threshold value, corresponding for present image counter is added one, when described second difference is greater than predetermined threshold value, corresponding for present image counter is added one.
Further, described predeterminable area is focusing area.
Further, described predetermined threshold value be greater than 50 candelas/square metre value.
The acquisition device of the photographic images that the embodiment of the present invention provides can perform the acquisition methods of the photographic images that any embodiment of the present invention provides, and possesses the corresponding functional module of manner of execution and beneficial effect.
The know-why that above are only preferred embodiment of the present invention and use.The invention is not restricted to specific embodiment described here, the various significant changes can carried out for a person skilled in the art, readjust and substitute all can not depart from protection scope of the present invention.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by the scope of claim.
Claims (10)
1. an acquisition methods for photographic images, is characterized in that, comprising:
After shutter trigger event being detected, obtain several preview images of current storage;
According to the luminance difference of often pair of neighbor pixel in the predeterminable area that width preview image each in several preview images described is corresponding, from several preview images described, select preview image that a width definition is the highest as target image to show.
2. method according to claim 1, it is characterized in that, according to the luminance difference of often pair of neighbor pixel in the predeterminable area that width preview image each in several preview images described is corresponding, from several preview images described, the highest preview image of a width definition is selected to comprise to carry out display as target image:
Using the every width preview image in several preview images described as present image, order chooses pixel in described present image as current pixel point, calculate the difference of the brightness of described current pixel point and the brightness of adjacent pixel, when described difference is greater than predetermined threshold value, corresponding for present image counter is added one;
The value of the relatively described corresponding counter of several preview images, using preview image maximum for the value of counter as target image to show.
3. method according to claim 2, it is characterized in that, described adjacent pixel be with current pixel point right adjacent right pixel and with adjacent lower pixel under current pixel point, the difference of the brightness of the described current pixel point of described calculating and the brightness of adjacent pixel, when described difference is greater than predetermined threshold value, corresponding for present image counter is added one and comprises:
Calculate the second difference of the brightness of the first difference of the brightness of described current pixel point and the brightness of right pixel and the brightness of described current pixel point and lower pixel, when described first difference is greater than predetermined threshold value, corresponding for present image counter is added one, when described second difference is greater than predetermined threshold value, corresponding for present image counter is added one.
4., according to the arbitrary described method of claim 1-3, it is characterized in that, described predeterminable area is focusing area.
5. according to the method in claim 2 or 3, it is characterized in that, described predetermined threshold value be greater than 50 candelas/square metre value.
6. an acquisition device for photographic images, is characterized in that, comprising:
Preview image acquiring unit, for after shutter trigger event being detected, obtains several preview images of current storage;
Target image selection unit, for the luminance difference according to often pair of neighbor pixel in predeterminable area corresponding to width preview image each in several preview images described, from several preview images described, select preview image that a width definition is the highest as target image to show.
7. device according to claim 6, is characterized in that, described target image selection unit comprises:
Counter computation subunit, for using the every width preview image in several preview images described as present image, order chooses pixel in described present image as current pixel point, calculate the difference of the brightness of described current pixel point and the brightness of adjacent pixel, when described difference is greater than predetermined threshold value, corresponding for present image counter is added one;
Target image display subelement, for the value of the relatively described corresponding counter of several preview images, using preview image maximum for the value of counter as target image to show.
8. device according to claim 7, is characterized in that, described counter computation subunit specifically for:
Calculate the second difference of the brightness of the first difference of the brightness of described current pixel point and the brightness of right pixel and the brightness of described current pixel point and lower pixel, when described first difference is greater than predetermined threshold value, corresponding for present image counter is added one, when described second difference is greater than predetermined threshold value, corresponding for present image counter is added one.
9., according to the arbitrary described device of claim 6-8, it is characterized in that, described predeterminable area is focusing area.
10. the device according to claim 7 or 8, is characterized in that, described predetermined threshold value be greater than 50 candelas/square metre value.
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