CN103037162A - Zero time delay photographic system and zero time delay photographic method - Google Patents
Zero time delay photographic system and zero time delay photographic method Download PDFInfo
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- CN103037162A CN103037162A CN2012104124038A CN201210412403A CN103037162A CN 103037162 A CN103037162 A CN 103037162A CN 2012104124038 A CN2012104124038 A CN 2012104124038A CN 201210412403 A CN201210412403 A CN 201210412403A CN 103037162 A CN103037162 A CN 103037162A
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Abstract
The invention discloses a zero time delay photographic system. The zero time delay photographic system comprises an image sensor, an image signal front processing unit, a memorizer, an image signal back processing unit, an image display unit and an image display screen, wherein the image signal front processing unit receives outside photographic field images output by the image sensor, processes the images, and then stores the images in the memorizer, the image signal back processing unit reads and processes the images in the memorizer, and then the images are displayed on the image display screen through the image display unit. The zero time delay photographic system further comprises an image signal control unit used for control the image reduction function of the image signal front processing unit. The invention further discloses a zero time delay photographic method. The zero time delay photographic system and the zero time delay photographic method can shorten time difference between an expected photographic field image and an actually-obtained photographic field image, and enable the time difference to be too little to be ignored, namely, zero time delay between the expected photographic field image and the actually-obtained photographic field image is realized.
Description
Technical field
The present invention relates to the image technique process field, relate in particular to a kind of zero propagation photographic system and method.
Background technology
Be divided into two stages with the digital camera photograph: image preview and picture catching.It no matter is which in stage, its process all is that outside scenery converts digital signal to by imageing sensor, this signal is stored in the memory after being received and process by the picture signal pretreatment unit, then by the image in the picture signal post-processing unit read memory, be presented on the image display panel by image-display units after processing accordingly.
Because image preview adopts different resolution during with picture catching, so there is an image resolution ratio handover operation in the photograph process.Present way is the resolution of switching imageing sensor output, is specially imageing sensor is configured to low resolution carries out image preview, when finding object scene, again imageing sensor is configured to high-resolution, then carries out picture catching.
The time that switching the resolution of imageing sensor output needs is comprised of two parts: reconfigure required time of imageing sensor and imageing sensor required time of image of stable output again.At first, also be topmost, it is a second level that imageing sensor is configured again the required time of stable output image, this time that will directly cause switching imageing sensor output resolution ratio needs is at least a second level; Secondly, the frequency of the configuration interface of imageing sensor is slow, substantially all in the K level.So, the object scene image that is equivalent to the camerist expectation to have between the actual scene image that obtains of camerist one second level time difference, the image that camerist obtains has not been image seen when tripping.For one thing, the image when camerist might wish that taking a sportsman lifts leg, it is actual that what obtain has been the image of sportsman will stop over the time.
Summary of the invention
For above-mentioned technical problem, the present invention proposes a kind of zero propagation photographic system, comprise imageing sensor, the picture signal pretreatment unit, memory, the picture signal post-processing unit, image-display units and image display panel, be stored in the memory after wherein the outside scene image of picture signal pretreatment unit reception imageing sensor output is processed, by image-display units image is presented on the image display panel after image in the picture signal post-processing unit read memory is processed, described system also comprises:
Image signal control unit is for the image reduction capability of control chart image signal pretreatment unit.
Accordingly, the invention allows for a kind of photographic means that is applicable to the zero propagation of described system, comprising: when preview image, open the image reduction capability of picture signal pretreatment unit, be stored in the memory after image resolution ratio is dwindled; When catching image, the image reduction capability of forbidding the picture signal pretreatment unit is stored in the memory according to the former resolution of image.
Implement the present invention, can shorten the scene image of expectation to the time difference between the actual scene image that obtains, it be may diminish to be left in the basket, namely the scene image of expectation is realized zero propagation between the actual scene image that obtains.
Description of drawings
In order to be illustrated more clearly in the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art.
Fig. 1 is the photographic system schematic diagram of prior art;
Fig. 2 is a kind of zero propagation photographic system of the present invention schematic diagram;
Fig. 3 is the present invention's flow chart of a kind of zero propagation photographic means picture browsing stage;
Fig. 4 is the present invention's flow chart of a kind of zero propagation photographic means picture catching stage.
Embodiment
In order to make those skilled in the art person understand better technical scheme in the embodiment of the invention, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing technical scheme among the present invention is described in further detail.
Fig. 1 is the schematic diagram of the photographic system of prior art.Wherein, CPU104, picture signal pretreatment unit 105 and picture signal post-processing unit 106, image-display units 107 is positioned at the inside of a system; Imageing sensor 101, memory 102 and image display panel 103 are external devices.The function of each major part is:
Imageing sensor 101: the device that outside scenery can be converted to digital signal.
Picture signal pretreatment unit 105: then the digital signal that the receives imageing sensor output operations such as the color space conversion of the circumstances in which people get things ready for a trip, image scaling of going forward side by side are stored in the memory.
Picture signal post-processing unit 106: the image in the read memory, carry out the operation such as special effect processing, color space conversion of image, and with image signal output to image-display units.
Image-display units 107: receive the picture signal of picture signal post-processing unit, carry out the operations such as image scaling, then export corresponding picture signal sequential in order to image is presented on the screen according to the type of image display panel.
CPU104: the configuration all parts can be worked by the mode of expectation them.
Be divided into two stages with the digital camera photograph: image preview and picture catching.It no matter is which in stage, its process all is: outside scenery converts digital signal to by imageing sensor 101, this signal is stored in the memory 102 after being received and process by picture signal pretreatment unit 105, then the image in picture signal post-processing unit 106 read memories 102 is presented on the image display panel 103 by image-display units 107 after processing accordingly.
The purpose of image preview is that the image with outside scenery is presented on the image display panel 103 continuously, so that camerist can find object scene and right moment for camera from image display panel 103.At this moment, can adopt lower resolution (such as 800x600), higher frame per second (such as 30 frame/seconds) is in order to can obtain the effect of smooth image preview.
The purpose of picture catching is that the image with object scene is stored in the memory 102, in order to do further processing or be kept as a souvenir.Picture catching is the operation for the specific objective frame, can adopt higher resolution (such as 4096x4096), in order to can keep image information as much as possible.
Because image preview adopts different resolution with picture catching, so there is an image resolution ratio handover operation in the photograph process.The time that image resolution ratio is switched is equivalent to scene image that camerist sees and the time interval of the actual scene image that obtains.This time is longer, and the difference between the scene image that camerist is seen and the actual scene image that obtains will be larger.For one thing, the image when camerist might wish that taking a sportsman lifts leg, it is actual that what obtain has been the image of sportsman will stop over the time.
General way is the resolution of switching imageing sensor 101 outputs now, be specially and imageing sensor 101 is configured to low resolution carries out image preview, when finding object scene, again imageing sensor 101 is configured to high-resolution, then carry out picture catching.The time that switching the resolution of imageing sensor 101 outputs needs is comprised of two parts: reconfigure required time of imageing sensor 101 and imageing sensor 101 required time of image of stable output again.At first, it is a second level that imageing sensor 101 is configured again the required time of stable output image, and this time that will directly cause switching imageing sensor 101 output resolution ratio needs is at least a second level; Secondly, imageing sensor 101 and CPU104 are on different chips, and CPU104 configuration image transducer 101 just needs to use peripheral interface so, and the frequency of this configuration interface is slow, substantially all in the K level.So, the object scene image that is equivalent to the camerist expectation to have between the actual scene image that obtains of camerist one second level time difference, the image that camerist obtains has not been image seen when tripping.
For the scene image that can shorten expectation to the time difference between the actual scene image that obtains, it be may diminish to is left in the basket, the present invention proposes a kind of zero propagation photographic system, as shown in Figure 2, wherein, CPU204, picture signal pretreatment unit 205, picture signal post-processing unit 206 and image-display units 207 are positioned at the inside of a system; Imageing sensor 201, memory 202 and image display panel 203 are external devices, comprise in addition:
Image signal control unit 208 is for the image reduction capability of control chart image signal pretreatment unit.
In the described system, prearranged image signal pretreatment unit 205 is to have high-resolution image from the outside scene image that imageing sensor 201 receives.
The invention allows for a kind of photographic means of zero propagation, comprising: when preview image, open the image reduction capability of picture signal pretreatment unit 205, be stored in the memory 202 after image is dwindled resolution; When catching image, the image reduction capability of forbidding picture signal pretreatment unit 205 is stored in the memory 202 according to the former resolution of image.
In the present invention, the image resolution ratio handover operation between image preview and the picture catching is no longer realized by reconfiguring imageing sensor 201, realizes but reconfigure picture signal pretreatment unit 205 by image signal control unit 208.For example, the resolution that image preview requires is D1, and the resolution that picture catching requires is in the D2(practical application, and D2 can be much larger than D1).Be specially, when image preview and picture catching, the resolution of imageing sensor 201 is D2, namely with large resolution work; When image preview, picture signal pretreatment unit 205 stores the resolution of image into memory 202 again by the D1 that narrows down to of D2, and the image reduction capability of when picture catching, forbidding picture signal pretreatment unit 205, directly output resolution ratio is the image of D2.
Specifically, during image preview, method flow work shown in Figure 3 is pressed by described system:
301, imageing sensor 201 output resolution ratios are the image of D2;
302, picture signal pretreatment unit 205 reception resolution are the image of D2;
303, image signal control unit 208 control chart image signal pretreatment units 205 narrow down to D1 with image by D2;
304, picture signal pretreatment unit 205 is that the image of D2 stores memory 202 into resolution;
305, picture signal post-processing unit 206 readout resolution from memory 202 is the image of D2;
306, image-display units 207 is that the image of D2 is shown to image display panel 203 with resolution.
During picture catching, method flow work shown in Figure 4 is pressed by described system:
401, imageing sensor 201 output resolution ratios are the image of D2;
402, picture signal pretreatment unit 205 reception resolution are the image of D2;
403, picture signal pretreatment unit 205 is that the image of D2 stores memory 202 into resolution;
404, picture signal post-processing unit 206 readout resolution from memory 202 is the image of D2;
405, image-display units 207 is that the image of D2 is shown to image display panel 203 with resolution.
In sum, switch to being operating as of picture catching needs by image preview: the image reduction capability of opening picture signal pretreatment unit 205; Switch to being operating as of image preview needs by picture catching: the image reduction capability of forbidding picture signal pretreatment unit 205.
Like this, be converted to the image reduction capability of forbidding or opening picture signal pretreatment unit 205 with switching image resolution ratio by switching imageing sensor 201 output resolution ratios.The needed time is the time of a register manipulation on the chip internal bus, if CPU204 is 1GHz, the time of switching so the image resolution ratio actual needs only was tens nanoseconds, with respect to the movement velocity of outside scenery, can be left in the basket fully, namely realize the zero propagation photograph.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. zero propagation photographic system, comprise imageing sensor, the picture signal pretreatment unit, memory, picture signal post-processing unit, image-display units and image display panel, be stored in the memory after wherein the outside scene image of picture signal pretreatment unit reception imageing sensor output is processed, by image-display units image is presented on the image display panel after image in the picture signal post-processing unit read memory is processed, it is characterized in that, described system also comprises:
Image signal control unit is for the image reduction capability of control chart image signal pretreatment unit.
2. the system as claimed in claim 1 is characterized in that, the picture signal pretreatment unit is to have high-resolution image from the outside scene image that imageing sensor receives.
3. system as claimed in claim 2 is characterized in that, described image signal control unit specifically is used for:
If open the image reduction capability of picture signal pretreatment unit, the high-resolution image that then will receive is reduced into low-resolution image and is stored in the memory;
If forbid the image reduction capability of picture signal pretreatment unit, the high-resolution image that then will receive is stored in the memory.
4. a zero propagation photographic means is characterized in that, is adapted to system claimed in claim 1, and described method comprises: when preview image, open the image reduction capability of picture signal pretreatment unit, be stored in the memory after image resolution ratio is dwindled; When catching image, the image reduction capability of forbidding the picture signal pretreatment unit is stored in the memory according to the former resolution of image.
5. method as claimed in claim 4 is characterized in that, it is to have high-resolution image that the image that imageing sensor obtains outside scenery is set before image is stored in the memory.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108830809A (en) * | 2018-06-05 | 2018-11-16 | 陕西师范大学 | One kind is based on expansion convolved image denoising method |
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| CN101095341A (en) * | 2005-01-05 | 2007-12-26 | 诺基亚公司 | Digital imaging with autofocus |
| CN101163221A (en) * | 2006-10-09 | 2008-04-16 | 三星电子株式会社 | Method and apparatus for photographing an object to produce still image while recording moving picture |
| JP2009065582A (en) * | 2007-09-10 | 2009-03-26 | Olympus Imaging Corp | Camera having enlarged display function and camera control method |
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| CN101095341A (en) * | 2005-01-05 | 2007-12-26 | 诺基亚公司 | Digital imaging with autofocus |
| CN1949828A (en) * | 2005-10-11 | 2007-04-18 | Lg电子株式会社 | Image photographing apparatus and method |
| CN101001325A (en) * | 2006-01-13 | 2007-07-18 | 奥林巴斯映像株式会社 | Digital camera |
| CN101163221A (en) * | 2006-10-09 | 2008-04-16 | 三星电子株式会社 | Method and apparatus for photographing an object to produce still image while recording moving picture |
| JP2009065582A (en) * | 2007-09-10 | 2009-03-26 | Olympus Imaging Corp | Camera having enlarged display function and camera control method |
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| CN108830809A (en) * | 2018-06-05 | 2018-11-16 | 陕西师范大学 | One kind is based on expansion convolved image denoising method |
| CN108830809B (en) * | 2018-06-05 | 2022-05-03 | 陕西师范大学 | Image denoising method based on expansion convolution |
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Application publication date: 20130410 |