CN1469187A

CN1469187A - Image synthesis and synthesizer for digital camera

Info

Publication number: CN1469187A
Application number: CNA021262071A
Authority: CN
Inventors: 杨世安
Original assignee: Inventec Corp
Current assignee: Inventec Corp
Priority date: 2002-07-15
Filing date: 2002-07-15
Publication date: 2004-01-21

Abstract

The image synthesis method and synthesizer for digital camera may display different scenes of the same picture but in different field depths in different position in the picture clearly and simultaneously. By means of image synthesis, the scenes to be taken are multiple exposed and synthesized to form one image file, so that different scenes may be displayed clearly.

Description

The image synthetic method and the device thereof of digital camera

Technical field

The present invention relates to a kind of image synthetic method and device, refer to be applied to a kind of image synthetic method and the device thereof of digital camera especially.

Background technology

Another title of digital camera is " Digital Still Camera " (DSC; Digital StillCamera), in order to distinguish with the digital dynamic video camera, digital camera is to utilize digitized information to store the captured image that obtains, but it utilizes the disk sheet or the PCMCIA memory cards such as (Personal Computer Memory Card International Association) of a recording image, store static image, in order to save the employed storage space of Storage Media, usually the captured image of digital camera all is to store with condensed document, and common have a JPEG (JointPhotographic Experts Group; Joint image professional body) document format.

As shown in Figure 1, known digital camera is to utilize main CPU (central processing unit) 18 to control the action of all, and the user is then by user's interface device 19 control figure cameras; When taking, automatically adjust camera lens 10 in focusing unit 12 by main CPU (central processing unit) 18 controls, and flash unit 14 actions are controlled in automatic exposure unit 13, the image of gained is handled by charge coupled cell 11 earlier and is changed into digital signal, adjust image by digital signal processor 16 and Automatic white balance unit 15 again, then image is reached in the working storage 17 and keep in, and the image of gained can be presented on the display 20; Image can be compressed into document by compression unit 21 with image at last, can be stored in the storage device 22.

Yet traditional digital camera can only be focused in a certain field depth, treating the scenery of taking the photograph takes and exposes, therefore resulting image has only near the scenery of focusing part can obtain image clearly, and the scenery beyond the focusing part, it is unintelligible to thicken.For instance, take a child who stands against a lofty mountain setting when desire, then can focus on one's body the child, so in the photo of gained, the child can be very clear, but high mountain at a distance then can become quite fuzzy.

On the other hand, the camera lens of digital camera is often there to be the aberration of a kind of so-called filed curvature (FieldCurvature), this aberration be since when focusing when scenery is central, the scenery edge can be imaged on any position, the place ahead a little, so can make the edge of scenery thicken; Otherwise at the edge of scenery, then scenery central authorities can be imaged on any position, rear a little as focusing, so that scenery central authorities can seem is fuzzy.

Summary of the invention

The technical problem to be solved in the present invention is provides a kind of image of digital camera synthetic method and device thereof, can be with scenery to be taken the photograph, and depth of field distance no matter, or the central authorities of scenery or edge can both clearly be presented on same image.

In order to achieve the above object, the method that digital camera image disclosed in this invention is synthetic is at first carried out multiexposure, multiple exposure and is obtained a plurality of images a scenery to be taken the photograph; Should keep in to one first working storage by a plurality of images again; Capture the pixel of a plurality of focusings in these a plurality of images again; The synthetic image documents of pixel that again will these a plurality of focusings; In temporary then this image documents to one second working storage.Wherein treating and take the photograph the step that scenery carries out multiexposure, multiple exposure, can be this to be waited to take the photograph scenery exposed to focusing far in regular turn by near, or this is waited to take the photograph scenery focus in regular turn from central authorities to edge and expose.So, scenery to be taken all can clearly be presented.

In order to achieve the above object, but the present invention also provides a kind of digital camera of resultant image, except that each unit with known digital camera, also comprise a synthesis unit, one first working storage and one second working storage, to one wait to take the photograph scenery according to the depth of field by near to far away or by the central authorities of scenery to the edge, after multiexposure, multiple exposure is carried out in focusing in regular turn, a plurality of images of obtaining are temporary to this first working storage, and capture the pixel of a plurality of focusings in these a plurality of images, utilize this synthesis unit to synthesize an image documents pixel of these a plurality of focusings, temporary to one second working storage.So can make no matter depth of field distance of scenery to be taken the photograph, or the central authorities of scenery or marginal portion, can both clearly present.

For making purpose of the present invention, structural attitude and function thereof are had further understanding, conjunction with figs. is described in detail as follows now.

Description of drawings

Fig. 1 is the device synoptic diagram of known digital camera;

Fig. 2 is a process flow diagram of the present invention;

Fig. 3 is a device synoptic diagram of the present invention; And

Fig. 4 is the embodiments of the invention process flow diagram.

Embodiment

The image synthetic method of digital camera disclosed in this invention, see also Fig. 2, at first treat and take the photograph scenery and carry out multiexposure, multiple exposure (step 31), according to the depth of field by near to far away or by the central authorities of scenery to the edge, multiexposure, multiple exposure is carried out in focusing in regular turn, and obtain a plurality of images, and it is temporary to the working storage (step 32), again the pixel of focusing in the image in the working storage is captured out (step 33), and the synthetic image documents (step 34) of the pixel of a plurality of focusings that will capture, again that synthetic image documents is temporary to another working storage (step 35).

For instance, it is the child's of background photo (not shown) with the distant place high mountain that desire is taken one, digital camera can be focused to the child earlier and expose, and the pixel that the child partly focuses is captured to a working storage, focusing exposes to the distant place high mountain again, at a distance the high mountain pixel of partly focusing captures out then, and synthesize an image documents with pixel that previous child partly focuses, just can obtain a distant place high mountain and reach nearby all clear photographs of child.

Or for example want to take the photo (not shown) of a sport car, digital camera can be focused to the middle body of sport car earlier and expose, and the pixel that the middle body of sport car is focused captures to a working storage, focusing exposes to sport car by the mediad edge in regular turn again, the pixel that to wherein focus captures out then, and synthesized an image documents with the pixel of previous focusing, just can obtain a sport car middle body to the marginal portion clear photographs all.

But and the synthetic digital camera of the present invention's image, see also Fig. 3, be to have a synthesis unit 24 with the topmost difference of known digital camera, can synthesize an image documents in order to pixel with capture focusing, at first remove the content (step 36) in the working storage during shooting, see also Fig. 4, comprise first working storage 23 and second working storage 25; Focusing in regular turn exposes (step 37), utilizes the automatic focusing unit 12 and the automatic exposure unit 13 of digital camera, treat the scenery taken the photograph by near to far away, or focus in regular turn by central authorities to the edge of scenery and to expose; After captured image is handled via charge coupled cell 11 and digital signal processor 16, temporary to first working storage 23 (step 38) again in the image with first working storage 23, pixel (Pixel) acquisition of focusing is come out, again with the previous pixel that captures and be temporary in second working storage 25, utilize synthesis unit 24 in a synthetic image documents (step 39), therefore be empty in second working storage 25 time, do not have any pixel, therefore the pixel in first working storage 23 directly can be deposited to second working storage 25 (step 40); Judge the pixel in second working storage 25 then, whether equate (step 41) with the pixel of desire shooting picture, because the scenery to a certain focal length exposes (the nearest scenery or the central part of scenery), so only there is the focusing part clear, so the pixel that captured can not equal desire the pixel of shooting picture, and can return step 37, the scenery to next focal length exposes again; Captured image after treatment, temporary to first working storage 23 (step 38) then in the image with first working storage 23, pixel (Pixel) acquisition of focusing is come out, again with the previous pixel that captures and be temporary in second working storage 25, utilize synthesis unit 24 in a synthetic image documents (step 39), temporary again to second working storage 25 (step 40); So constantly focusing, expose, capture pixel in regular turn assembles, until the pixel in second working storage 25, when equating with the pixel of desire shooting picture, after then utilizing compression unit 21 to be compressed into image documents the pixel in second working storage 25, be stored in the storage device 22 (step 42).

So, can make the captured scenery of digital camera, no matter be that the depth of field is far away or near, or the central authorities of scenery or edge, all can obtain image clearly.

The synthetic method of image of utilizing of the present invention can overcome the limited shortcoming of the general camera depth of field, obtains to nearby to the image of the overlength depth of field all clearly at a distance; Also can overcome the shortcoming of camera lens filed curvature, obtain scenery central authorities to the edge image all clearly.

The above only is the present invention's preferred embodiment wherein, is not to be used for limiting practical range of the present invention; Be that all equalizations of doing according to scope of patent protection of the present invention change and modification, be all scope of patent protection of the present invention and contain.

Claims

1, the synthetic method of a kind of digital camera image is characterized in that comprising at least the following step:

One scenery to be taken the photograph is carried out multiexposure, multiple exposure and obtains a plurality of images;

Should keep in to one first working storage by a plurality of images;

Capture the pixel of a plurality of focusings in these a plurality of images;

With the synthetic image documents of the pixel of these a plurality of focusings; And

In temporary this image documents to one second working storage.

2, the synthetic method of digital camera image according to claim 1 is characterized in that this is treated to take the photograph the step that scenery carries out multiexposure, multiple exposure, is this to be waited to take the photograph scenery exposed to focusing far in regular turn by near.

3, the synthetic method of digital camera image according to claim 1 is characterized in that this is treated to take the photograph the step that scenery carries out multiexposure, multiple exposure, is to wait to take the photograph scenery central authorities to edge by this to focus in regular turn and expose.

4, a kind of digital camera that can image is synthetic is characterized in that:

Also comprise a synthesis unit, one first working storage and one second working storage, one scenery to be taken the photograph is carried out multiexposure, multiple exposure, keep in to this first working storage after obtaining a plurality of images, and capture the pixel of a plurality of focusings in these a plurality of images, pixel that again will these a plurality of focusings utilizes this synthesis unit to synthesize an image documents, and is temporary to this second working storage.