CN102244722B - Image capture module and image capture method for avoiding shutter delay - Google Patents

Abstract

The invention provides an image acquisition module and an image acquisition method. The image capturing module mainly comprises an image signal processing unit, a preview interface module and an image temporary storage module. The image signal processing unit processes the received image data stream to generate a preview image stream and an output image stream, and respectively transmits the preview image stream and the output image stream to the preview interface module for output and the image temporary storage module for temporary storage. The preview image stream comprises a first preview image frame; the output video stream includes a first output video frame corresponding to the first preview video frame. When the image capturing command is generated after the preview interface module receives and outputs the first preview image frame, the image temporary storage module outputs the first output image frame from the buffer memory unit.

Description

Image capture module and image capture method for avoiding shutter delay

technical field

The present invention relates to an image capture module and an image capture method used therein; specifically, the present invention relates to an image capture module capable of avoiding shutter delay and an image capture method used therein.

Background technique

The application range and fields of digital imaging have grown significantly in recent years, and the technical level has also been continuously improved. In order to meet the needs of users for using digital images, digital cameras and other electronic devices provide digital image capture functions to facilitate photography in various occasions and occasions.

FIG. 1A is a schematic diagram of a traditional digital image capture module. A traditional digital image capture module includes an image sensor 20 , an image processor 10 , a preview interface device 30 and a preview display 60 . When in the preview mode before shooting, the image sensor 20 converts the received light into a signal 21 and sends it to the image processor 10 . The image processor 10 processes the signal 21 into an image signal 11 and sends it to the preview interface device 30 and the preview display 60 connected behind it to generate a preview image. When the user sees the image to be shot through the preview display 60 in the preview mode, he presses the shutter to enter the image capture mode, and captures the image from the image processor 10 .

As shown in FIG. 1B , the image signal 11 includes a plurality of first, second, and third image frames 61 , 63 , 65 arranged in time sequence. The first, second, and third image frames 61 , 63 , and 65 are images respectively captured by the image sensor 20 in consecutive times. After the first image frame 61 is completely transmitted from the preview interface device 30 to the preview display 60, the preview display 60 will display the first image frame 61 as a preview image. At this moment, the image signal outputted by the image processor 10 is the second image frame 63 . In other words, when the user sees the previewed first image frame 61 and presses the shutter, the image that can be captured from the image processor 10 is not the completely output first image frame 61 . Since the previewed image is different from the captured output image, a so-called shutter lag phenomenon occurs.

In addition, in order to increase the frame update frequency in the preview mode, the image sensor 20 usually outputs an image signal with a lower resolution but a higher update frequency in the preview mode, which is processed by the image processor 10 into a first image A visual frame 61 and a second image visual frame 63 . When the user presses the shutter button, the image sensor 20 is switched to output an image signal with full resolution but with a lower update frequency, such as the third image frame 65 . However, the image sensor 20 also consumes time during the switching process of the output specification, so that a signal window time is formed between the second image frame 63 and the third image frame 65 . This window time will aggravate the above-mentioned shutter delay phenomenon, so that there will be a greater time and image gap between the user's preview image and the actually captured output image.

Contents of the invention

The purpose of the present invention is to provide an image capture module and an image capture method used therein to solve the problem of shutter delay.

Another object of the present invention is to provide an image capture module and an image capture method used therein, which can make the output image captured by the user the same as the preview image when the shutter is pressed.

Another object of the present invention is to provide an image capture module and an image capture method used therein, which can be easily integrated with back-end systems and other application devices.

The image capture module mainly includes an image signal processing unit, a preview interface module and an image temporary storage module. The image capture module is connected to the image source and receives the image data stream provided by the image source. The image source receives external light and converts it into an electronic signal to generate an image data stream, and the image signal processing unit receives the image data stream from the image source. The image signal processing unit processes the received image data stream to generate a preview image stream and an output image stream. The preview image stream is sent to the preview interface module, and then output to form a preview image. The output image stream is sent to the image temporary storage module for temporary storage; in other words, the preview image stream and the output image stream are formed as two independent signal paths.

The preview image stream includes the first preview image frame; the output image stream includes the first output image frame and corresponds to the first preview image frame. When in the preview mode, the first preview image frame is received and output by the preview interface module, the first output image frame is also received and temporarily stored by the image temporary storage module synchronously. When the preview interface module completely outputs the first preview image frame, the first preview image frame will be displayed as a preview image for users to watch. At this time, the first output image frame has also been temporarily stored by the image The module is completely received and temporarily stored.

When the user presses the shutter or activates other trigger devices to generate an image capture command, the system outputs the temporarily stored first output image frame as the captured output image according to the image capture command. Since the first preview image frame corresponds to the first output image frame, the images displayed by the two are naturally the same. Through this design, the delay of the shutter or the image processing can be avoided, and consequently there will be a gap between the image seen by the user when the shutter is pressed and the actual output image.

Description of drawings

FIG. 1A is a schematic diagram of a traditional image capture module;

FIG. 1B is a schematic diagram of an image signal generated by a traditional image capture module;

2 is a schematic diagram of an embodiment of an image capture module;

3 is a schematic diagram of an embodiment of an image signal inside an image capture module;

4 is a schematic diagram of another embodiment of an image capture module;

FIG. 5 is a schematic diagram of an embodiment including a delay time T;

Fig. 6 is a schematic diagram of an embodiment including an identification number;

7 is a schematic diagram of an embodiment of a buffer memory unit;

FIG. 8A is a schematic diagram of an embodiment including an image capture preparation mode;

FIG. 8B is a schematic diagram of another embodiment including an image capture preparation mode;

FIG. 9 is a flowchart of an embodiment of an image capture method;

FIG. 10 is a flow chart of another embodiment of the image capture method.

Description of main component symbols

100 image capture modules

200 image sources

210 image data stream

300 image signal processing units

310 preview image streaming

311 first preview video frame

312 second preview video frame

313 The third preview video frame

330 output video streaming

331 first output video frame

332 second output video frame

333 third output video frame

411 First Identification Number

500 preview interface modules

600 baseband processor/display

700 image temporary storage module

710 buffer memory unit

711, 712, 719 temporary storage area

730 image compression unit

800 image capture command

810 image capture preparation command

910 central processing unit

930 shutter

931 first segment trigger

932 second segment trigger

Detailed ways

The present invention provides an image capture module and an image capture method used therein. In a preferred embodiment, the image capture module and image capture method of the present invention are applied in a digital camera; however, in different embodiments, the image capture module and image capture method of the present invention can also be applied to In other electronic devices that require image processing functions, such as mobile phones, personal digital assistants, satellite navigation devices, handheld video game consoles, etc.

As shown in FIG. 2 , the image capture module 100 mainly includes an image signal processing unit 300 , a preview interface module 500 and an image temporary storage module 700 . The image capture module 100 is connected to the image source 200 and receives an image data stream 210 provided by the image source 200 . The image source 200 preferably includes various image sensors, such as Charge Coupled Device (CCD), Complementary Metal Oxide Semiconductor (CMOS), and the like. The image source 200 receives external light and converts it into an electronic signal to generate an image data stream 210 , and the image signal processing unit 300 receives the image data stream 210 from the image source 200 . In this preferred embodiment, the image data stream 210 generated by the image source 200 is output at a fixed timing and with a fixed resolution. However, in different embodiments, the timing/frame frequency or resolution of the image data stream 210 generated by the image source 200 can also be appropriately switched to achieve additional functions.

As shown in FIG. 2 , the video signal processing unit 300 processes the received video data stream 210 to generate a preview video stream 310 and an output video stream 330 . The preview image stream 310 is preferably formed by the image signal processing unit 300 processing the image data stream 210 by reducing the resolution or adjusting the data format. The data format of the preview image stream 310 is preferably RGB or YUV format, so as to meet the purpose of subsequent preview or output. In addition, the image signal processing unit 300 can also perform noise filtering or other processing on the image data stream 210 to form a preview image stream 310 .

The preview image stream 310 is sent to the preview interface module 500 . In a specific product design, the preview interface module 500 can be connected to the baseband processor of the system as required, and then connected to an application device such as a display; however, in different embodiments, the preview interface module 500 is also designed as Connect directly to application devices such as monitors to provide preview images. As shown in FIG. 2 , after receiving the preview image stream 310 , the preview interface module 500 outputs the preview image stream to application devices such as the baseband processor/display 600 of the system. After the baseband processor/display 600 completely receives a certain frame in the preview image stream 310 , it will display the image of the frame as a preview image for the user to watch.

As shown in FIG. 2 , the output video stream 330 is preferably formed by the video signal processing unit 300 after processing the video data stream 210 to adjust the data format or filter noise. The data format of the output video stream 330 is preferably in RGB, YUV or RAW format, so as to meet the requirements of subsequent compression or output. In a preferred embodiment, the video signal processing unit 300 does not perform resolution reduction processing on the video data stream 210 to form the output video stream 330; however, in different embodiments, the output video stream 330 can also reduce resolution. The degree of formation is formed to meet different system output requirements.

The generated output image stream 330 is sent to the image temporary storage module 700; in other words, the preview image stream 310 and the output image stream 330 are formed into two independent signal paths, and are sent to different places for follow-up deal with. The image temporary storage module 700 has at least one buffer memory unit 710 , and the output video stream 330 is temporarily stored in the buffer memory unit 710 . In the preferred embodiment shown in FIG. 2 , the image temporary storage module 700 includes an image compression unit 730 disposed before the buffer memory unit 710 . The output video stream 330 is compressed by the video compression unit 730 and then temporarily stored in the buffer memory unit 710 . In a preferred embodiment, the image compression unit 730 is a JPEG image compression engine, and compresses the frames in the output image stream 330 into a JPEG image format respectively; however, in different embodiments, the image compression unit 730 can also be Image compression engines for different formats.

As shown in FIG. 3 , the preview image stream 310 includes a first preview image frame 311 , a second preview image frame 312 and a third preview image frame 313 ; the output image stream 330 includes The first output video frame 331 , the second output video frame 332 and the third output video frame 333 . Wherein the first preview image grid 311, the second preview image grid 312 and the third preview image grid 313 correspond to the first output image grid 331, the second output image grid 332 and the third output image respectively The frame 333 ; in other words, the first preview image frame 311 and the first output image frame 331 are generated from the same frame in the original image data stream 210 provided by the image source 200 . The subsequent other preview and output image frames can also be deduced by analogy. However, in a preferred embodiment, the resolution of the first preview image frame 311 is preferably smaller than that of the first output image frame 331 because the resolution of the preview image frame usually needs to be adjusted according to the pixel specification of the display. Image resolution.

In the preferred embodiment shown in FIG. 3, when in the preview mode, the first preview image frame 311 is received and output by the preview interface module 500, the first output image frame 331 is also imaged synchronously. Received and temporarily stored by the temporary storage module 700. When the preview interface module 500 completely outputs the first preview image frame 311 to the baseband processor/display 600, the first preview image frame 311 will be displayed as a preview image for users to watch. In other words, when the user sees the first preview image frame 311 and presses the shutter or activates other trigger devices to enter the image capture mode, the first preview image frame 311 has been completely output by the preview interface module 500 , and the first output image frame 331 has also been completely received and temporarily stored by the image temporary storage module 700 .

Since the user presses the shutter or activates other trigger devices, an image capture command 800 will be generated to enter the image capture mode. At this time, the system outputs the temporarily stored first output image frame 331 according to the image capture command 800 as the captured image. output image. In addition, the first output image frame 331 can also be sent to the preview image module 500 for external output for the user to confirm or view the captured output image. Since the first preview image frame 311 corresponds to the first output image frame 331 ; that is, the video contents of both are from the same frame of the video data stream 210 , the displayed images of the two are naturally the same. Through this design, the delay of the shutter or the image processing can be avoided, and consequently there will be a gap between the image seen by the user when the shutter is pressed and the actual output image.

In addition, in this preferred embodiment, after the image capture command 800 is generated to enter the image capture mode, the preview interface module 500 and the image temporary storage module 700 can stop receiving the preview image stream 310 and outputting the image stream respectively. flow 330 to reduce power consumption. However, when leaving the image capture mode and entering the preview mode again, the preview interface module 500 and the image temporary storage module 700 start to receive the preview image stream 310 and output the image stream 330 respectively.

In the embodiment shown in FIG. 4 , the image capture module 100 also includes a central processing unit 910 and a shutter 930 . The shutter 930 generates an image capture command 800 according to the user's operation, and sends it to the central processing unit 910 . In different embodiments, the shutter 930 can also be formed by a touch panel or other triggering devices. When the central processing unit 910 receives the image capture command 800 , that is, according to the generation time of the image capture command 800 , it accesses and outputs the corresponding first output image frame 331 from the buffer memory unit 710 .

In the embodiment shown in FIG. 5 , the time point when the system receives the image capture command 800 is during the process that the second preview image frame 312 is received and output by the preview interface module 500 . The displayed preview image is the first preview image frame 311 . However, the second preview image frame 312 is not the next frame immediately after the first preview image frame 311 due to the delay caused by the baseband processor/display 600 or other processing data. One or several other preview image frames 315 are sandwiched between them. In order to correctly output the image corresponding to the first preview image frame 311 that the user previews, the central processing unit 910 can judge to access the correct output image according to the preset preview delay time T. For example, when the image capture command 800 is generated in the process of receiving and outputting the second preview image frame 312 by the preview interface module 500, the central processing unit 910 accesses the preset delay time from the buffer memory unit 710. The first output image frame 331 before T is used as the output image. The pre-delay time T can be known in advance through testing, and can be preset in the central processing unit 910 .

However, in different embodiments, there may be no other preview image frames between the first preview image frame 311 and the second preview image frame 312, that is, the baseband processor/display 600 or other processing data No delays were caused. At this time, if the image capture command 800 is generated during the process that the second preview image frame 312 is received and output by the preview interface module 500 , that is, the first preview image frame 311 is output by the preview interface module 500 At the last frame, the central processing unit 910 may also directly access the first output image frame 331 immediately before the second output image frame 332 from the buffer memory unit 710 as the output image. Wherein the second output image frame 332 is corresponding to the second preview image frame 312, and when the second preview image frame 312 is received and output by the preview interface module 500, the second output image frame 332 is relatively Preferably, it is in the process of being compressed by the image compression unit 730 and temporarily stored in the buffer memory unit 710 .

In the embodiment shown in FIG. 6, each preview image frame has an identification number. For example, the first preview frame 311 has a first identification number 411 . The identification number is preferably included in the data packet forming each frame of the preview image and can be interpreted by the baseband processor/display 600 . When the first preview image frame 311 is displayed as a preview image by the baseband processor/display 600, and the user triggers the shutter 930 to generate the image capture command 800, the baseband processor/display 600 returns the first The first identification number 411 of the preview frame 311 is given to the central processing unit 910 . According to the received first identification number 411 , the central processing unit 910 can access the corresponding first output image 331 from the buffer memory unit 710 as the output image.

As mentioned above, the frame of the preview image displayed as a preview image and the frame of the preview image being received by the preview interface module 500 are not necessarily closely connected, and there may be other preview images between them. depending on the frame. Therefore, in the embodiment shown in FIG. 7 , the buffer memory unit 710 may include a plurality of temporary storage areas 711 and 712 for temporarily storing a plurality of output image frames corresponding to the preview image frames. As shown in FIG. 7 , the first output video frame 331 and the second output video frame 332 included in the output video stream 330 are sequentially stored in the temporary storage areas 711 and 712 . After the final temporary storage area 719 is stored, the output image frames generated subsequently are overwritten and stored sequentially from the initial temporary storage area 711 .

In the embodiment shown in FIG. 8A , an image capture preparation mode is further included between the preview mode and the image capture mode; the activation of the image capture preparation mode is triggered by an image capture preparation command 810 . In a preferred embodiment, the shutter device 930 has a first segment trigger 931 and a second segment trigger 932 . The first stage trigger 931 is preferably a trigger action such as lens focusing or light metering, which can be achieved by lightly touching the first stage shutter or clicking the focus position on the touch panel. The second trigger 932 is preferably a trigger action for capturing images, such as actually pressing the shutter button or clicking the shutter icon on the touch panel.

As shown in FIG. 8A , in the preview mode, the first trigger 931 has not been activated, and only the preview image stream 310 is generated by the image signal processing unit 300 and sent to the preview interface module 500; and the output image The stream 330 is not generated and sent to the image temporary storage module 700 . When the image capture preparation command 810 is generated, that is, the first trigger 931 is activated, the image signal processing unit 300 starts to generate and transmit the output image stream 330 to the image temporary storage module 700 . The subsequent process after entering the image capture mode is as described above, and will not be repeated here. Through this design, the power consumption of the system in the preview mode can be further reduced, thereby reducing system resource consumption and improving performance.

In addition, in different embodiments, as shown in FIG. 8B , when the preview mode is received before the image capture preparation command 810 is received, the system can switch the image source 200 to provide an image data string 210 with a lower resolution, so that The preview image stream 310 has a higher image update frequency. After receiving the image capture preparation command 810 and entering the subsequent image capture preparation mode, the system then switches the image source 200 to provide the image data string 210 with higher resolution, and simultaneously A preview video stream 310 and an output video stream 330 are generated.

FIG. 9 is a flowchart of an embodiment of the image capturing method of the present invention. As shown in FIG. 9 , step 1010 includes generating a preview video stream according to the video data stream; wherein, the preview video stream includes a first preview video frame. The preview image stream is preferably formed by reducing the resolution of the image data stream, adjusting the data format or filtering noise, etc. The data format is preferably RGB or YUV format to meet the subsequent preview or output for.

Step 1030 includes sending the preview image stream to the preview interface module to output the preview image stream. After receiving the preview image stream, the preview interface module outputs it to the system's baseband processor/display and other application devices. After the baseband processor/display completely receives a certain frame in the preview image stream, it will display the image of the frame as a preview image for users to watch.

Step 1050 includes generating an output video stream according to the video data stream; wherein, the output video stream includes a first output video frame corresponding to a first preview video frame. In other words, the first preview image frame and the first output image frame are generated from the same frame in the original image data stream. The output video stream is preferably formed by processing the video data stream through data format adjustment or noise filtering. The data format of the output video stream is preferably RGB, YUV or RAW format, so as to meet the purpose of subsequent compression or output. In a preferred embodiment, the image data stream is not processed to reduce the resolution to form an output image stream; however, in different embodiments, the output image stream can also be formed by reducing the resolution to match different system output requirements.

Step 1070 includes sending the output image stream to the image temporary storage module to temporarily store the output image stream in a buffer memory unit in the image temporary storage module. In other words, the preview image stream and the output image stream are formed into two independent signal paths, and are sent to different places for subsequent processing. In a preferred embodiment, when the first preview image frame is received and output by the preview interface module, the first output image frame is also simultaneously received and temporarily stored by the image temporary storage module. In addition, in order to reduce the load of the buffer memory unit or meet the requirements of the output image format, the output image stream can be compressed by the image compression unit before being temporarily stored in the buffer memory unit. The aforementioned compressed format can be JPEG format, but is not limited thereto.

Step 1090 includes receiving an image capture command and outputting a first output image frame from the buffer memory unit according to the image capture command, wherein the image capture command is generated after the preview interface module receives and outputs the first preview image frame . As mentioned above, when the preview interface module completely outputs the first preview image frame, the first preview image frame will be displayed as a preview image for the user to watch. In other words, when the user sees the first preview image frame and presses the shutter or activates other trigger devices to generate an image capture command, the first output image frame has also been completely received and temporarily stored by the image temporary storage module . At this time, the system outputs the temporarily stored first output image frame as the captured output image according to the image capture command. Since the first preview image frame corresponds to the first output image frame, the video contents of both come from the same frame of the video data stream, and the displayed images of the two are naturally the same. Through this design, the delay of the shutter or the image processing can be avoided, and consequently there will be a gap between the image seen by the user when the shutter is pressed and the actual output image.

In the embodiment shown in FIG. 10 , the step 1050 of generating the output video stream includes step 1051 , starting to generate the output video stream to the image temporary storage module according to the image capture preparation command. The image capture preparation command is preferably simultaneously triggered by the first shutter of the two-stage shutter or a trigger action generated by other trigger devices, and the aforesaid trigger action is preferably used to control lens focusing or light metering and other actions. Since the system does not generate an output image stream before receiving an image capture preparation command, but only needs to generate a preview image stream, this embodiment can further reduce the power consumption of the system in the preview mode, and thereby reduce System resource consumption to improve performance.

The present invention has been described by the above-mentioned related embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and equivalent arrangements included in the spirit and scope of the claims are included in the scope of the present invention.

Claims (20)

1. an image acquisition module supplies pick-up image in the image data crossfire that an image source provides, and this image acquisition module comprises:

One signal of video signal processing unit is to receive this image data crossfire, and produces a previewing video streaming and an image output crossfire respectively according to this image data crossfire; Wherein, this previewing video streaming comprises one first previewing image and looks lattice; This image output crossfire comprises one first image output and looks lattice to looking lattice by the first previewing image;

One previewing interface module, this signal of video signal processing unit receives and exports this previewing video streaming certainly; And

One image is kept in module, has at least one buffer memory unit; The temporary module of this image receives this image output crossfire and is temporary in this buffer memory unit from this signal of video signal processing unit;

Wherein, when an image capture order result from this previewing interface module receive and export this first previewing image look lattice after the time, the temporary module of this image is exported this first image output and is looked lattice in this buffer memory unit.

2. image acquisition module as claimed in claim 1, further comprise a CPU signal and connect the temporary module of this image, this CPU is to receive this image capture order, and looks lattice according to this image capture order from this first image output of this buffer memory cell access output.

3. image acquisition module as claimed in claim 2, wherein this previewing video streaming comprises and is positioned at the one second previewing image that this first previewing image looks after the lattice and looks lattice; The time point that this CPU receives this image capture order is to receive and export this second previewing image and look in the process of lattice in this previewing interface module, and this CPU determines this first image output of access to look lattice according to this time point and a default previewing delay time.

4. image acquisition module as claimed in claim 2, wherein this first previewing image is looked lattice and is had an identiflication number, and this CPU determines to look lattice from this first image output of this buffer memory cell access according to this identiflication number.

5. image acquisition module as claimed in claim 1, wherein this previewing interface module receives and exports that this first previewing image is looked the sequential of lattice and the temporary module of this image receives and temporary this first image output is looked lattice sequential is to carry out synchronously.

6. image acquisition module as claimed in claim 1, wherein to look the image analytic degree that the image analytic degree of lattice looks lattice than this first image output be little to this first previewing image.

7. image acquisition module as claimed in claim 1, wherein the temporary module of this image comprises an image compression unit and is arranged at before this buffer memory unit, and this image output crossfire is to be temporary in this buffer memory unit after this image compression unit is handled.

8. image acquisition module as claimed in claim 1, wherein this buffer memory unit comprises a plurality of working areas, and it is to deposit this plural number working area in regular turn in that the plural image output that this image output crossfire comprises is looked lattice; After this working area of most end was deposited in, this image output that continues was looked lattice and is namely returned to make carbon copies in regular turn from this initial working area and deposit in.

9. image acquisition module as claimed in claim 1, wherein in this buffer memory unit this first image output of output to look lattice be to be sent to this previewing interface module with outside output.

10. image acquisition module as claimed in claim 1, wherein this signal of video signal processing unit according to this image output crossfire of the initial output of an image capture warning order to the temporary module of this image.

11. image acquisition module as claimed in claim 10 further comprises a shutter device and a CPU, this CPU connects this signal of video signal processing unit and the temporary module of this image respectively; Wherein this shutter device has one first section triggering and one second section triggering; This this image capture warning order of first section triggering for generating, and this this image capture order of second section triggering for generating.

12. image acquisition module as claimed in claim 1, wherein this first previewing image is looked lattice and is looked lattice for last of this previewing interface module output.

13. an image acquisition method, for pick-up image in the image data crossfire that an image source provides, this image acquisition method comprises the following step:

Produce a previewing video streaming according to this image data crossfire; Wherein, this previewing video streaming comprises one first previewing image and looks lattice;

Transmit this previewing video streaming to previewing interface module to export this previewing video streaming;

Produce an image output crossfire according to this image data crossfire; Wherein, this image output crossfire comprises one first image output and looks lattice to looking lattice by the first previewing image;

Transmit the temporary module of this image output crossfire to an image, with the buffer memory unit of temporary this image output crossfire in the temporary module of this image; And

Receive an image capture order and in this buffer memory unit, export this first image output according to this image capture order and look lattice; Wherein this image capture order results from this previewing interface module reception and exports this first previewing image and look after the lattice.

14. image acquisition method as claimed in claim 13, wherein this previewing video streaming comprises and is positioned at the one second previewing image that this first previewing image looks after the lattice and looks lattice; A time point that receives this image capture order is to receive and export this second previewing image and look in the process of lattice in this previewing interface module; Wherein this first image output is looked lattice output step and is comprised: determine this first image output of output to look lattice according to this time point and a default previewing delay time.

15. image acquisition method as claimed in claim 13, wherein this first image output is looked lattice output step and comprised: an identiflication number that has according to this first previewing image determines that exporting this first image output from this buffer memory unit looks lattice.

16. image acquisition method as claimed in claim 13, wherein this previewing interface module receives and exports that this first previewing image is looked the sequential of lattice and the temporary module of this image receives and temporary this first image output is looked lattice sequential is to carry out synchronously.

17. image acquisition method as claimed in claim 13, wherein this previewing video streaming generation step comprises: reduce the image analytic degree of this image data crossfire, to produce this previewing video streaming.

18. image acquisition method as claimed in claim 13, wherein this image output crossfire transfer step comprises:

Transmitting this image output crossfire to the image compression unit in the temporary module of this image handles; And

This image output crossfire after the temporary processing in this buffer memory unit.

19. image acquisition method as claimed in claim 13, wherein this image output crossfire transfer step comprises:

It is to deposit plural working area in regular turn in that the plural image output of this image output crossfire is looked lattice; And

After this working area of most end is deposited in, this image output that continues is looked lattice return to make carbon copies in regular turn from this initial working area and deposit in.

20. image acquisition method as claimed in claim 13, wherein this image output crossfire generation step comprises: keep in module according to this image output crossfire of the initial generation of an image capture warning order to this image.

Images