WO2015127774A1 - 慢速快门拍摄方法和拍摄装置 - Google Patents

慢速快门拍摄方法和拍摄装置 Download PDF

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Publication number
WO2015127774A1
WO2015127774A1 PCT/CN2014/085629 CN2014085629W WO2015127774A1 WO 2015127774 A1 WO2015127774 A1 WO 2015127774A1 CN 2014085629 W CN2014085629 W CN 2014085629W WO 2015127774 A1 WO2015127774 A1 WO 2015127774A1
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Prior art keywords
image
module
photographing
window
framing window
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PCT/CN2014/085629
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English (en)
French (fr)
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里强
魏强
苗雷
王锴
井洪亮
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努比亚技术有限公司
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Priority to KR1020167026110A priority Critical patent/KR101766614B1/ko
Priority to CN201480073264.8A priority patent/CN106063246A/zh
Priority to JP2016554345A priority patent/JP6317466B2/ja
Publication of WO2015127774A1 publication Critical patent/WO2015127774A1/zh
Priority to US15/247,595 priority patent/US10194086B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H04N23/631—Graphical user interfaces [GUI] specially adapted for controlling image capture or setting capture parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/72—Combination of two or more compensation controls
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/743—Bracketing, i.e. taking a series of images with varying exposure conditions

Definitions

  • the present invention relates to the field of imaging technology, and in particular, to a slow shutter shooting method and a photographing apparatus.
  • the shutter speed in the camera indicates the time the shutter stays open while the camera is shooting.
  • the shutter speed and the aperture size of the lens (also called the focal length ratio) determine the amount of light that reaches the film or sensor, or the amount of exposure. The faster the shutter speed, the shorter the exposure time and the less exposure, but moving objects can produce sharper images on the film. The slower the shutter speed, the longer the exposure time, the more the exposure, but the image of the moving object on the film will appear blurred.
  • shooting at a shutter speed of 1/30 second or less is called slow shutter shooting. Take photos with special effects or artistic effects with slow shutter speeds.
  • some imaging devices can collect image data at regular intervals during slow shutter shooting, and continuously generate image images in a single image, thereby realizing real-time display exposure effects.
  • the interval time for continuously acquiring image data in the prior art is fixed, and cannot be changed according to specific conditions, and different cameras process different data speeds, and the same camera device processes data at different speeds in different situations. . Therefore, if the interval time is set too long, the real-time performance of the display exposure effect will be insufficient, which will affect the user experience; if the interval time setting is too short, it may exceed the computing power of the camera and cause data loss.
  • the main object of the present invention is to provide a slow shutter shooting method and a photographing device, which aim to maximize the utilization of the processing capability of the photographing device, improve the real-time performance of the exposure effect display, and improve the user experience.
  • the present invention provides a slow shutter shooting method, including the steps of:
  • the image data is continuously collected to the cache module, and the acquisition speed is adjusted according to the remaining space of the cache module;
  • the image is displayed in the viewfinder window.
  • the adjusting the acquisition speed according to the remaining space of the cache module comprises:
  • the displaying the image in the framing window comprises:
  • the images are displayed one by one in the framing window, and the resulting images are overlaid with images.
  • the step of displaying the image in the framing window further comprises:
  • the image selected by the user in the framing window is stored as a final photographed image in the image storage module.
  • the step of displaying the image in the framing window further comprises:
  • the image currently displayed in the framing window is stored as the final captured photo in the image storage module.
  • the continuously generating the image according to the image data comprises: continuously generating a preview size image and a full-size image according to the image data respectively;
  • the displaying the image in the framing window comprises: displaying the image in a framing window Preview the size image.
  • the displaying the image in the framing window comprises:
  • the preview size image is displayed one by one in the framing window, and the preview size image generated later covers the preview size image.
  • the step of displaying the image in the framing window further comprises:
  • the full-size image corresponding to the preview size image selected by the user in the framing window is stored as a final photographed image in the image storage module.
  • the step of displaying the image in the framing window further comprises:
  • the full-size image corresponding to the preview size image currently displayed in the framing window is stored as the final captured photo in the image storage module.
  • the invention also provides a photographing device, which comprises a control module, a photographing module, a cache module, Generate modules, temporary storage modules, and display modules, where:
  • the control module is set to comprehensively control the operation of each module
  • the photographing module is configured to continuously collect image data to the cache module during the photographing process, and adjust the collection speed according to the remaining space of the cache module;
  • a cache module configured to cache the image data
  • Generating a module configured to continuously generate an image according to the image data
  • a temporary storage module configured to temporarily store the continuously generated image
  • a display module configured to display the image in a viewfinder window.
  • the shooting module is configured to:
  • the temporary storage module includes a first temporary storage unit and a second temporary storage unit;
  • the display module is configured to display the image one by one in a framing window, and the image generated afterwards covers an image formed by the singularity.
  • the photographing apparatus further includes an image storage module, the display module is configured to display all the generated images in the framing window after the shooting ends; the control module is configured to: select the image selected by the user in the framing window The photo taken as the final shot is stored in the image storage module.
  • control module is configured to: after the end of the shooting, store the image currently displayed in the framing window as the final captured photo in the image storage module.
  • the generating module is configured to continuously generate a preview size image and a full size image according to the collected image data, and store the preview size image to the first temporary storage unit, and store the full size image to the Said second temporary storage unit;
  • the control module is configured to output a preview size image in the first temporary storage unit to the display module for display.
  • the display module is configured to display the preview size image one by one in the framing window, and the generated preview size image covers the preview size image.
  • the display module is configured to: after the end of the shooting, display all generated preview size images in the framing window; the control module is configured to: a full-size image corresponding to the preview size image selected by the user in the framing window The photo taken as the final shot is stored in the image storage module.
  • control module is configured to: after the end of the shooting, store the full-size image corresponding to the preview size image currently displayed in the finder window as the final captured photo in the image storage module.
  • the invention provides a slow shutter shooting method, which continuously collects image data during the whole shooting process, and continuously generates images by the collected image data, and displays them in the framing window in real time for the user to preview the exposure effect.
  • the acquisition speed is adjusted in real time according to the remaining space of the cache module, which can maximize the utilization of the processing capability of the camera, and prevent data loss due to excessive acquisition speed, and also improve display exposure.
  • the real-time effect of the effect enhances the user experience.
  • the user is also allowed to select a plurality of photos with different exposure effects from the framing window, so that the user can obtain a plurality of photos with various shooting effects in one shot, thereby further improving the user experience.
  • FIG. 1 is a flow chart of a first embodiment of a slow shutter shooting method of the present invention
  • FIG. 2 is a flow chart of a second embodiment of a slow shutter shooting method of the present invention.
  • Figure 3 is a block diagram showing a first embodiment of the photographing apparatus of the present invention.
  • Figure 4 is a block diagram showing a second embodiment of the photographing apparatus of the present invention.
  • the slow shutter shooting method includes the following steps:
  • Step S101 After the shooting starts, continuously collect image data to the cache module, and adjust the collection speed in real time according to the remaining space of the cache module.
  • the camera starts shooting and continuously collects image data to the cache module.
  • the acquisition speed is adjusted to a preset speed.
  • the photographing device detects that the remaining space of the cache module is more than 50%
  • the image data is collected at the maximum speed
  • the acquisition speed is reduced to half of the current speed
  • the remaining space of the cache module is restored to more than 50%
  • the acquisition speed is restored to the maximum speed again.
  • the preset value and the preset speed can be subdivided into multiples to achieve step-by-step increment or decrement. Therefore, the processing capability of the imaging device can be utilized to the utmost extent, and data overflow due to excessive acquisition speed can be prevented, thereby causing data loss.
  • Step S102 continuously generate an image according to the image data
  • the photographing device performs a series of operations on the acquired image data to generate an image, and temporarily stores the generated image. Specifically, the imaging device adds the currently received image data and the past image data to form a new image, and performs noise reduction processing on the generated image. At the same time, according to the exposure of the existing image, the synthesis ratio of the newly acquired image is controlled, and the overexposure is suppressed.
  • the photographing device continuously generates a preview size image and a full-size image respectively according to the collected image data, and outputs the preview size image to the viewfinder window for real-time display.
  • the preview size image refers to an image with a smaller pixel
  • the full-size image refers to an image with a larger pixel size that the user needs or sets, which is much larger than the pixel of the preview size image. Since the image generation speed of the pixel is also slow, when the calculation speed of the imaging device is slow, the image displayed in real time is relatively stuck.
  • the preview size image and the full-size image are respectively generated by two threads. Since the pixels of the preview size image are small, the generation speed is fast, so that the real-time display to the viewfinder window is smoother and avoids jamming.
  • Step S103 displaying the image one by one in the framing window, and the image generated after the image is covered by the image
  • the generated first image P1 is displayed in the framing window, a section After the time, the second image P2 is displayed on the framing window after covering the image P1, and the nth image Pn is displayed on the framing window after covering the image Pn-1.
  • Step S104 After the shooting ends, the image currently displayed in the framing window is stored as the final taken photo.
  • the shutter for slow shutter shooting includes a B-gate, a T-gate, etc., wherein the shutter remains open during the release of the shutter to the B-gate; when the shutter is pressed and the shutter is pressed again, the shutter remains open.
  • For the T door When the user observes that the exposure effect of the image currently displayed in the viewfinder window is satisfactory, release the B door or press the T door again to end the shooting, so that the entire exposure process also ends, and the camera will display the image currently displayed in the viewfinder window. The photo taken as the final shot is stored. This allows users to get better-performing photos in one shot.
  • the last generated full size image is stored as the final captured photo.
  • the slow shutter shooting method includes the following steps:
  • Step S201 After the shooting starts, continuously collect image data to the cache module, and adjust the collection speed in real time according to the remaining space of the cache module.
  • Step S202 continuously generating an image according to image data
  • Step S203 displaying the image one by one in the framing window, and the image generated after the image is covered by the image
  • Steps S201 to S203 in this embodiment are the same as steps S101 to S103 in the first embodiment, and step S201 corresponds to step S101, step S202 corresponds to step S102, and step S203 corresponds to step S103, and details are not described herein again.
  • Step S204 After the shooting ends, all the generated images are displayed in the framing window.
  • the entire shooting process is ended, and all the images generated by the camera are tiled in the viewfinder window for display, so that the exposure effect of the photos at different exposure times can be displayed in real time during the shooting process. And can display images with different exposure effects at the same time for users to compare and select.
  • Step S205 storing the image selected by the user in the framing window as the final photograph taken
  • the user can browse the image generated in the framing window, select one or more images that he or she likes, and the camera stores the image selected by the user as the final taken photo. This allows the user to get multiple photos with various shots in one shot.
  • the slow shutter shooting method of the present invention continuously collects image data during the entire shooting process, and continuously displays the collected image data in real time in the viewfinder window for the user to preview the exposure effect.
  • the acquisition speed is adjusted in real time according to the remaining space of the cache module, which can maximize the utilization of the processing capability of the camera, and prevent data loss due to excessive acquisition speed, and also improve display exposure.
  • the real-time effect of the effect enhances the user experience.
  • the user is also allowed to select a plurality of photos with different exposure effects from the framing window, so that the user can obtain a plurality of photos with various shooting effects in one shot, thereby further improving the user experience.
  • the photographing apparatus may be a camera or a terminal device such as a mobile phone or a tablet computer having an image capturing function, and the photographing device is a photographing device for realizing the above-described slow shutter shooting method. It includes a control module 110, a photographing module 120, a cache module 130, a generation module 140, a temporary storage module 150, a display module 160, and an image storage module 170.
  • the control module 110 is configured to comprehensively control the operation of each module, thereby controlling the entire process.
  • the photographing module 120 is configured to continuously collect image data to the cache module during the photographing process, and adjust the collection speed according to the remaining space of the cache module.
  • the shooting module 120 starts shooting, and continuously collects image data to the cache module.
  • the acquisition speed is adjusted to a preset speed.
  • the shooting module 120 detects that the remaining space of the cache module 130 is above 50%, the image data is collected at the maximum speed; when it is detected that the remaining space of the cache module 130 is less than 50%, the collection speed is reduced to the current speed. Half; when the remaining space of the cache module 130 is restored to more than 50%, the acquisition speed is restored to the maximum speed again.
  • the preset value and the preset speed can be subdivided into multiples to achieve step-by-step increment or decrement. Therefore, the processing capability of the photographing device can be utilized to the utmost extent, and the data overflow due to the excessively fast acquisition speed can be prevented, thereby causing data loss.
  • the generating module 140 is configured to continuously generate an image based on the image data.
  • the generating module 140 reads the image data in the cache module 130, performs a series of operations on the collected image data to generate an image, and stores the generated image in a temporary storage module. specific, The generating module 140 adds the currently acquired image data and the past image data to form a new image, and performs noise reduction processing on the generated image. At the same time, according to the exposure of the existing image, the synthesis ratio of the newly acquired image is controlled, and the overexposure is suppressed.
  • each image is continuously generated, it is limited by the calculation processing speed of the generation module 140, and the generated adjacent images also have a certain time interval. The faster the calculation speed is, the shorter the time interval is.
  • the generation module 140 generates an image. The speed in turn affects the speed at which the imaging module 120 captures image data. The faster the image is generated, the faster the image data in the buffer module 130 is read, and the space of the cache module is emptied too fast, so that the shooting module 120 collects. Image data is also faster.
  • the display module 160 is configured to display the continuously generated images in real time in the framing window.
  • the control module 110 outputs the images in the temporary storage module 150 to the display module 160 in real time, and the display module 160 displays the images one by one in the framing window, and the generated image covers the image formed by the image. That is, when the user presses the shutter, the generated first image P1 is displayed in the framing window, and after a period of time, the second image P2 is overlaid on the image P1 and displayed in the framing window..., after the nth image Pn covers the image Pn-1 Displayed in the viewfinder window. Thereby realizing the exposure effect of the photo at different exposure times in real time during shooting.
  • the shutter for slow shutter shooting includes a B-gate, a T-gate, etc., wherein the shutter remains open during the release of the shutter to the B-gate; when the shutter is pressed and the shutter is pressed again, the shutter remains open.
  • the T door When the user observes that the exposure effect of the image currently displayed in the framing window is satisfactory, the B gate is released or the T gate is pressed again to end the shooting, so that the entire exposure process also ends.
  • the control module 110 takes the image currently displayed in the framing window as the final taken photo and stores it in the image storage module 170, so that the user can obtain a better-performing photo with only one shooting.
  • control module 110 controls the display module 160 to display all the images generated during the shooting in the framing window for display by the user. Finally, the control module 110 stores one or more images selected by the user in the framing window as the final captured photos in the image storage module 170. Therefore, not only can the exposure effect of the photo at different exposure times be displayed in real time during shooting, but also images with different exposure effects can be simultaneously displayed.
  • the photographing apparatus includes a control module 110, a photographing module 120, a cache module 130, a generating module 140, a temporary storage module 150, a display module 160, and an image storage module 170.
  • the temporary storage module 150 includes a first temporary storage unit 151 and a second temporary storage unit 152, and the generation module 140 continuously generates a preview size image through two threads according to the collected image data. And the full-size image, and storing the preview size image to the first temporary storage unit 151, storing the full-size image to the second temporary storage unit 152, and the control module 110 outputting the preview size image in the first temporary storage unit 151 to the display Module 160 displays in real time. After the shooting ends, the control module 110 stores the last stored image in the second temporary storage unit 152 as the final captured photo in the image storage module 170. In some embodiments, the control module 110 then stores the image selected by the user in the viewfinder window from the second temporary storage unit 152 into the image storage module 170.
  • the preview size image refers to an image with a smaller pixel
  • the full-size image refers to an image with a larger pixel size that the user needs or sets, which is much larger than the pixel of the preview size image. Since the image generation speed of the pixel is also slow, when the calculation speed of the generation module 140 is slow, the image displayed in real time is compared and jammed. Therefore, the preview size image and the full-size image are respectively generated by two threads. Since the pixels of the preview size image are small, the generation speed is fast, and the sound is more smooth and does not get stuck when outputting to the viewfinder for real-time display.
  • the photographing apparatus of the present invention continuously collects image data during the entire photographing process of performing slow shutter shooting, and continuously generates an image by the collected image data, and displays it in the viewfinder window in real time for the user to preview the exposure effect.
  • the acquisition speed is adjusted in real time according to the remaining space of the cache module, which can maximize the utilization of the processing capability of the camera, and prevent data loss due to excessive acquisition speed, and also improve display exposure.
  • the real-time effect of the effect enhances the user experience.
  • the user is also allowed to select a plurality of photos with different exposure effects from the framing window, so that the user can obtain a plurality of photos with various shooting effects in one shot, thereby further improving the user experience.
  • the invention provides a slow shutter shooting method, which continuously collects image data during the whole shooting process, and continuously generates images by the collected image data, and displays them in the framing window in real time for the user to preview the exposure effect.
  • the acquisition speed is adjusted in real time according to the remaining space of the cache module, which can maximize the utilization of the processing capability of the camera, and prevent data loss due to excessive acquisition speed, and also improve display exposure.
  • the real-time effect of the effect enhances the user experience.
  • the user is also allowed to select a plurality of photos with different exposure effects from the framing window, so that the user can obtain a plurality of photos with various shooting effects in one shot, thereby further improving the user experience.

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  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
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  • Exposure Control For Cameras (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)

Abstract

本发明公开了一种慢速快门拍摄方法和拍摄装置，所述慢速快门拍摄方法包括步骤：在拍摄过程中，连续采集图像数据至缓存模块，并根据所述缓存模块的剩余空间调整采集速度；根据所述图像数据连续生成图像；在取景窗口中显示所述图像。从而，既能最大限度的利用拍摄装置的处理能力，又能防止因采集速度过快导致数据丢失，同时还提高了显示曝光效果的实时性，提升了用户体验。曝光结束后，还允许用户从取景窗口中选择多张不同曝光效果的照片，从而用户一次拍摄就能获得多张具有各种拍摄效果的照片，进一步提升了用户体验。

Description

慢速快门拍摄方法和拍摄装置 技术领域
本发明涉及摄像技术领域，尤其是涉及一种慢速快门拍摄方法和拍摄装置。
背景技术
拍摄装置中的快门速度表示相机进行拍摄的时候快门保持开启状态的时间，快门速度和镜头的光圈大小(也叫焦距比数)一起决定光到达胶片或传感器的量，或称曝光量。快门速度越快，则意味着曝光时间越短，曝光量便越少，但运动物体能在胶片上呈现更清晰的影像。快门速度越慢，则意味着曝光时间越长，曝光量越多，但运动物体在胶片上的影像会显得模糊，通常将使用1/30秒以下的快门速度拍摄照片称为慢速快门拍摄，利用慢速快门拍摄能够获得具有特殊效果或艺术效果的照片。
现有技术中，有的拍摄装置在慢速快门拍摄过程中能够每隔一定时间采集一次图像数据，并将图像数据连续生成一张张图像，从而实现了实时显示曝光效果。然而，现有技术中连续采集图像数据的间隔时间是固定的，不能根据具体情况进行变动，而不同的拍摄装置处理数据的速度不同，而同一拍摄装置在不同情形下处理数据的速度也不相同。因此，如果间隔时间设置太长，会导致显示曝光效果的实时性不够，影响用户体验；如果间隔时间设置太短，又有可能超出拍摄装置的计算能力而导致数据丢失。
发明内容
本发明的主要目的在于提供一种慢速快门拍摄方法和拍摄装置，旨在最大限度的利用拍摄装置的处理能力，提高曝光效果显示的实时性，提升用户体验。
为达以上目的，本发明提出一种慢速快门拍摄方法，包括步骤：
在拍摄过程中，连续采集图像数据至缓存模块，并根据所述缓存模块的剩余空间调整采集速度；
根据所述图像数据连续生成图像；
在取景窗口中显示所述图像。
优选地，所述根据所述缓存模块的剩余空间调整采集速度包括：
判断所述缓存模块的剩余空间是否达到预设值；
若是，则将采集速度调整到预设速度。
优选地，所述在取景窗口中显示所述图像包括：
在取景窗口中逐一显示所述图像，且后生成的图像覆盖先生成的图像。
优选地，所述在取景窗口中显示所述图像的步骤之后还包括：
拍摄结束后，在取景窗口中显示所有生成的图像；
将用户在取景窗口中选择的图像作为最终拍摄的照片存储于图像存储模块。
优选地，所述在取景窗口中显示所述图像的步骤之后还包括：
拍摄结束后，将取景窗口中当前显示的图像作为最终拍摄的照片存储于图像存储模块。
优选地，所述根据所述图像数据连续生成图像包括：根据所述图像数据分别连续生成预览尺寸图像和全尺寸图像；所述在取景窗口中显示所述图像包括：在取景窗口中显示所述预览尺寸图像。
优选地，所述在取景窗口中显示所述图像包括：
在取景窗口中逐一显示所述预览尺寸图像，且后生成的预览尺寸图像覆盖先生成的预览尺寸图像。
优选地，所述在取景窗口中显示所述图像的步骤之后还包括：
拍摄结束后，在取景窗口中显示所有生成的预览尺寸图像；
将用户在取景窗口中选择的预览尺寸图像所对应的全尺寸图像作为最终拍摄的照片存储于图像存储模块。
优选地，所述在取景窗口中显示所述图像的步骤之后还包括：
拍摄结束后，将取景窗口中当前显示的预览尺寸图像所对应的全尺寸图像作为最终拍摄的照片存储于图像存储模块。
本发明同时提出一种拍摄装置，包括控制模块、拍摄模块、缓存模块、 生成模块、临时存储模块和显示模块，其中：
控制模块，设置为综合控制各模块的运行；
拍摄模块，设置为在拍摄过程中，连续采集图像数据至缓存模块，并根据所述缓存模块的剩余空间调整采集速度；
缓存模块，设置为缓存所述图像数据；
生成模块，设置为根据所述图像数据连续生成图像；
临时存储模块，设置为临时存储所述连续生成的图像；
显示模块，设置为在取景窗口中显示所述图像。
优选地，所述拍摄模块设置为：
判断所述缓存模块的剩余空间是否达到预设值；
若是，则将采集速度调整到预设速度。
优选地，所述临时存储模块包括第一临时存储单元和第二临时存储单元；
优选地，所述显示模块设置为：在取景窗口中逐一显示所述图像，且后生成的图像覆盖先生成的图像。
优选地，所述拍摄装置还包括图像存储模块，所述显示模块设置为：拍摄结束后，在取景窗口中显示生成的所有图像；所述控制模块设置为：将用户在取景窗口中选择的图像作为最终拍摄的照片存储于所述图像存储模块。
优选地，所述控制模块设置为：拍摄结束后，将取景窗口中当前显示的图像作为最终拍摄的照片存储于所述图像存储模块。
所述生成模块设置为：根据采集到的图像数据分别连续生成预览尺寸图像和全尺寸图像，并将所述预览尺寸图像存储至所述第一临时存储单元，将所述全尺寸图像存储至所述第二临时存储单元；
所述控制模块设置为：将第一临时存储单元中的预览尺寸图像输出至所述显示模块予以显示。
优选地，所述显示模块设置为：在取景窗口中逐一显示所述预览尺寸图像，且后生成的预览尺寸图像覆盖先生成的预览尺寸图像。
优选地，所述显示模块设置为：拍摄结束后，在取景窗口中显示所有生成的预览尺寸图像；所述控制模块设置为：将用户在取景窗口中选择的预览尺寸图像所对应的全尺寸图像作为最终拍摄的照片存储于所述图像存储模块。
优选地，所述控制模块设置为：拍摄结束后，将取景窗口中当前显示的预览尺寸图像所对应的全尺寸图像作为最终拍摄的照片存储于所述图像存储模块。
本发明所提供的一种慢速快门拍摄方法，在整个拍摄过程中连续采集图像数据，并将采集到的图像数据连续生成图像，实时显示于取景窗口供用户预览曝光效果。在采集图像数据的过程中，根据缓存模块的剩余空间来实时调整采集速度，既能最大限度的利用拍摄装置的处理能力，又能防止因采集速度过快导致数据丢失，同时还提高了显示曝光效果的实时性，提升了用户体验。曝光结束后，还允许用户从取景窗口中选择多张不同曝光效果的照片，从而用户一次拍摄就能获得多张具有各种拍摄效果的照片，进一步提升了用户体验。
附图说明
图1是本发明的慢速快门拍摄方法第一实施例的流程图；
图2是本发明的慢速快门拍摄方法第二实施例的流程图；
图3是本发明的拍摄装置第一实施例的模块示意图；
图4是本发明的拍摄装置第二实施例的模块示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
参见图1，提出本发明的慢速快门拍摄方法第一实施例，所述慢速快门拍摄方法包括以下步骤：
步骤S101：拍摄开始后，连续采集图像数据至缓存模块，并根据缓存模块的剩余空间实时调整采集速度
当用户按下快门按键或触发虚拟快门按键后，拍摄装置开始进行拍摄，连续采集图像数据至缓存模块。在采集图像数据的过程中，实时判断缓存模块的剩余空间是否达到预设值，若是，则将采集速度调整到预设速度。
例如，拍摄装置检测到缓存模块的剩余空间在50％以上时，则以最大速度采集图像数据；当检测到缓存模块的剩余空间小于50％时，则将采集速度降至当前速度的一半；当缓存模块的剩余空间又恢复到50％以上时，采集速度再次恢复到最大速度。根据实际需要，预设值和预设速度可以细分为多个，实现逐级递增或递减。从而既能最大限度的利用拍摄装置的处理能力，又能防止因采集速度过快导致数据溢出，进而导致数据丢失。
步骤S102：根据所述图像数据连续生成图像
拍摄装置将采集到的图像数据进行一系列运算后生成图像，并将生成的图像临时存储起来。具体的，拍摄装置将当前接收到的图像数据与过去的图像数据进行加法运算后合成新的图像，并对生成的图像进行降噪处理。同时还根据现有图像的曝光度，控制新采集图像的合成比例，抑制过曝产生。假设第1张图像的RGB或者YUV信息为RGB1或YUV1(因YUV与RGB可互相转换，以下统一采用YUV来描述)，则第n张图像的YUV信息为：YUVn＝(1/m)*(YUV1+….+YUVn-1)，其中m为光圈参数值。各图像虽为连续生成，但受限于拍摄装置的计算处理速度，生成的相邻图像之间实际上也有一定的时间间隔，计算速度越快，时间间隔越短；同时，生成图像的速度反过来影响着前一步骤S101中采集图像数据的速度，生成图像的速度越快，读取缓存模块中的图像数据也越快，则缓存模块的空间被腾空得也快，从而拍摄装置采集图像数据的速度也更快。
在某些优选实施例中，拍摄装置根据采集到的图像数据分别连续生成预览尺寸图像和全尺寸图像，并将预览尺寸图像输出至取景窗口予以实时显示。所述预览尺寸图像是指像素较小的图像，全尺寸图像是指用户需要的或设置的像素较大的图像，比预览尺寸图像的像素大许多。因像素较大的图像生成速度也较慢，当拍摄装置的计算速度较慢时，会导致实时显示的图像比较卡顿。通过两个线程分别生成预览尺寸图像和全尺寸图像，由于预览尺寸图像的像素较小，因此生成速度快，从而在输出至取景窗口进行实时显示时会更加流畅，避免卡顿。
步骤S103：在取景窗口中逐一显示所述图像，且后生成的图像覆盖先生成的图像
即在用户按下快门之时起，生成的第一张图像P1显示于取景窗口，一段 时间后第二张图像P2覆盖图像P1后显示于取景窗口…，第n张图像Pn覆盖图像Pn-1后显示于取景窗口。从而实现在拍摄过程中实时显示照片在不同曝光时间的曝光效果。
步骤S104：拍摄结束后，将取景窗口中当前显示的图像作为最终拍摄的照片予以存储
进行慢速快门拍摄的快门包括B门、T门等，其中快门按下后到快门释放期间，快门保持开启状态的为B门；快门按下后到快门再次按下期间，快门保持开启状态的为T门。当用户观察到取景窗口中当前显示的图像的曝光效果比较满意，则释放B门或再次按下T门结束拍摄，从而整个曝光过程也结束，此时拍摄装置则将取景窗口中当前显示的图像作为最终拍摄的照片予以存储。从而用户只需一次拍摄就能获得效果较佳的照片。
对于某些实施例中分别生成预览尺寸图像和全尺寸图像的情况，则将最后生成的全尺寸图像作为最终拍摄的照片予以存储。
参见图2，提出本发明慢速快门拍摄方法第二实施例，所述慢速快门拍摄方法包括以下步骤：
步骤S201：拍摄开始后，连续采集图像数据至缓存模块，并根据缓存模块的剩余空间实时调整采集速度
步骤S202：根据图像数据连续生成图像
步骤S203：在取景窗口中逐一显示所述图像，且后生成的图像覆盖先生成的图像
本实施例中的步骤S201～S203与第一实施例中的步骤S101～S103相同，且步骤S201对应步骤S101，步骤S202对应步骤S102，步骤S203对应步骤S103，在此不再赘述。
步骤S204：拍摄结束后，在取景窗口中显示生成的所有图像
用户释放B门或再次按下T门后结束整个拍摄过程，拍摄装置将生成的所有图像全部平铺于取景窗口中予以显示，从而在拍摄过程中不但能实时显示照片在不同曝光时间的曝光效果，并且能同时显示具有不同曝光效果的图像，供用户对比挑选。
步骤S205：将用户在取景窗口中选择的图像作为最终拍摄的照片予以存储
用户可以浏览取景窗口中生成的图像，从中选择自己中意的一张或多张图像，拍摄装置将用户选择的图像作为最终拍摄的照片存储起来。从而用户通过一次拍摄就能获得多张具有各种拍摄效果的照片。
据此，本发明的慢速快门拍摄方法，在整个拍摄过程中连续采集图像数据，并将采集到的图像数据连续生成图像实时显示于取景窗口供用户预览曝光效果。在采集图像数据的过程中，根据缓存模块的剩余空间来实时调整采集速度，既能最大限度的利用拍摄装置的处理能力，又能防止因采集速度过快导致数据丢失，同时还提高了显示曝光效果的实时性，提升了用户体验。曝光结束后，还允许用户从取景窗口中选择多张不同曝光效果的照片，从而用户一次拍摄就能获得多张具有各种拍摄效果的照片，进一步提升了用户体验。
参见图3，提出本发明拍摄装置第一实施例，所述拍摄装置可以是相机或具有摄像功能的手机、平板电脑等终端设备，所述拍摄装置为实现上述慢速快门拍摄方法的拍摄装置，其包括控制模块110、拍摄模块120、缓存模块130、生成模块140、临时存储模块150、显示模块160和图像存储模块170。
控制模块110：设置为综合控制各模块的运行，进而控制整个流程。
拍摄模块120：设置为在拍摄过程中，连续采集图像数据至缓存模块，并根据缓存模块的剩余空间调整采集速度。
当用户按下快门按键或触发虚拟快门按键后，拍摄模块120开始进行拍摄，连续采集图像数据至缓存模块。在采集图像数据的过程中，实时判断缓存模块的剩余空间是否达到预设值，若是，则将采集速度调整到预设速度。
例如，拍摄模块120检测到缓存模块130的剩余空间在50％以上时，则以最大速度采集图像数据；当检测到缓存模块130的剩余空间小于50％时，则将采集速度降至当前速度的一半；当缓存模块130的剩余空间又恢复到50％以上时，采集速度再次恢复到最大速度。根据实际需要，预设值和预设速度可以细分为多个，实现逐级递增或递减。从而既能最大限度的利用拍摄装置的处理能力，又能防止因采集速度过快导致数据溢出，进而造成数据丢失。
生成模块140：设置为根据图像数据连续生成图像。
生成模块140读取缓存模块130中的图像数据，将采集到的图像数据进行一系列运算后生成图像，并将生成的图像存储于临时存储模块。具体的， 生成模块140将当前采集到的图像数据与过去的图像数据进行加法运算后合成新的图像，并对生成的图像进行降噪处理。同时还根据现有图像的曝光度，控制新采集图像的合成比例，抑制过曝产生。假设第1张图像的RGB或者YUV信息为RGB1或YUV1(因YUV与RGB可互相转换，以下统一采用YUV来描述)，则第n张图像的YUV信息为：YUVn＝(1/m)*(YUV1+….+YUVn-1)，其中m为光圈参数值。
各图像虽为连续生成，但受限于生成模块140的计算处理速度，生成的相邻图像之间也有一定的时间间隔，计算速度越快，时间间隔越短；同时，生成模块140生成图像的速度反过来影响着拍摄模块120采集图像数据的速度，生成图像的速度越快，读取缓存模块130中的图像数据也越快，则缓存模块的空间被腾空得也快，从而拍摄模块120采集图像数据的速度也更快。
显示模块160：设置为在取景窗口中实时显示连续生成的图像。
控制模块110将临时存储模块150中的图像实时输出至显示模块160，显示模块160在取景窗口中逐一显示所述图像，且后生成的图像覆盖先生成的图像。即在用户按下快门之时起，生成的第一图像P1显示于取景窗口，一段时间后第二张图像P2覆盖图像P1后显示于取景窗口…，第n张图像Pn覆盖图像Pn-1后显示于取景窗口。从而实现在拍摄过程中实时显示照片在不同曝光时间的曝光效果。
进行慢速快门拍摄的快门包括B门、T门等，其中快门按下后到快门释放期间，快门保持开启状态的为B门；快门按下后到快门再次按下期间，快门保持开启状态的为T门。当用户观察到取景窗口中当前显示的图像的曝光效果比较满意，则释放B门或再次按下T门结束拍摄，从而整个曝光过程也结束。拍摄结束后，控制模块110将取景窗口中当前显示的图像作为最终拍摄的照片，并将其存储于图像存储模块170，从而用户只需一次拍摄就能获得效果较佳的照片。
在某些实施例中，拍摄结束后，控制模块110控制显示模块160将拍摄过程中生成的所有图像全部平铺于取景窗口中予以显示，以供用户对比挑选。最后控制模块110将用户在取景窗口中选择的一张或多张图像作为最终拍摄的照片，存储于图像存储模块170中。从而在拍摄过程中不但能实时显示照片在不同曝光时间的曝光效果，并且能同时显示具有不同曝光效果的图像。
参见图4，提出本发明的拍摄装置第二实施例，所述拍摄装置包括控制模块110、拍摄模块120、缓存模块130、生成模块140、临时存储模块150、显示模块160和图像存储模块170。
本实施例与上一实施例的区别在于临时存储模块150包括第一临时存储单元151和第二临时存储单元152，生成模块140根据采集到的图像数据，通过两个线程分别连续生成预览尺寸图像和全尺寸图像，并将预览尺寸图像存储至第一临时存储单元151，将全尺寸图像存储至第二临时存储单元152，控制模块110将第一临时存储单元151中的预览尺寸图像输出至显示模块160予以实时显示。拍摄结束后，控制模块110将第二临时存储单元152中最后存储的图像作为最终拍摄的照片存储于图像存储模块170中。在某些实施例中，控制模块110则将用户在取景窗口中选择的图像从第二临时存储单元152中存储至图像存储模块170中。
所述预览尺寸图像是指像素较小的图像，全尺寸图像是指用户需要的或设置的像素较大的图像，比预览尺寸图像的像素大许多。因像素较大的图像生成速度也较慢，当生成模块140的计算速度较慢时，会导致实时显示的图像比较卡顿。因此通过两个线程分别生成预览尺寸图像和全尺寸图像，由于预览尺寸图像的像素较小，因此生成速度快，从而在输出至取景窗口进行实时显示时会更加流畅，不会卡顿。
本发明的拍摄装置，在进行慢速快门拍摄的整个拍摄过程中连续采集图像数据，并将采集到的图像数据连续生成图像，实时显示于取景窗口供用户预览曝光效果。在采集图像数据的过程中，根据缓存模块的剩余空间来实时调整采集速度，既能最大限度的利用拍摄装置的处理能力，又能防止因采集速度过快导致数据丢失，同时还提高了显示曝光效果的实时性，提升了用户体验。曝光结束后，还允许用户从取景窗口中选择多张不同曝光效果的照片，从而用户一次拍摄就能获得多张具有各种拍摄效果的照片，进一步提升了用户体验。应当理解的是，以上仅为本发明的优选实施例，不能因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。
工业适用性：
本发明所提供的一种慢速快门拍摄方法，在整个拍摄过程中连续采集图像数据，并将采集到的图像数据连续生成图像，实时显示于取景窗口供用户预览曝光效果。在采集图像数据的过程中，根据缓存模块的剩余空间来实时调整采集速度，既能最大限度的利用拍摄装置的处理能力，又能防止因采集速度过快导致数据丢失，同时还提高了显示曝光效果的实时性，提升了用户体验。曝光结束后，还允许用户从取景窗口中选择多张不同曝光效果的照片，从而用户一次拍摄就能获得多张具有各种拍摄效果的照片，进一步提升了用户体验。

Claims (19)

  1. 一种慢速快门拍摄方法，包括步骤：
    在拍摄过程中，连续采集图像数据至缓存模块，并根据所述缓存模块的剩余空间调整采集速度；
    根据所述图像数据连续生成图像；
    在取景窗口中显示所述图像；
    拍摄结束后，在取景窗口中显示所有生成的图像；
    将用户在取景窗口中选择的图像作为最终拍摄的照片存储于图像存储模块。
  2. 一种慢速快门拍摄方法，包括步骤：
    在拍摄过程中，连续采集图像数据至缓存模块，并根据所述缓存模块的剩余空间调整采集速度；
    根据所述图像数据连续生成图像；
    在取景窗口中显示所述图像。
  3. 根据权利要求2所述的慢速快门拍摄方法，其中，所述根据所述缓存模块的剩余空间调整采集速度包括：
    判断所述缓存模块的剩余空间是否达到预设值；
    若是，则将采集速度调整到预设速度。
  4. 根据权利要求2所述的慢速快门拍摄方法，其中，所述根据所述图像数据连续生成图像包括：根据所述图像数据分别连续生成预览尺寸图像和全尺寸图像；所述在取景窗口中显示所述图像包括：在取景窗口中显示所述预览尺寸图像。
  5. 根据权利要求2所述的慢速快门拍摄方法，其中，所述在取景窗口中显示所述图像包括：
    在取景窗口中逐一显示所述图像，且后生成的图像覆盖先生成的图像。
  6. 根据权利要求4所述的慢速快门拍摄方法，其中，所述在取景窗口中显示所述图像包括：
    在取景窗口中逐一显示所述预览尺寸图像，且后生成的预览尺寸图像覆盖先生成的预览尺寸图像。
  7. 根据权利要求2所述的慢速快门拍摄方法，其中，所述在取景窗口中显示所述图像的步骤之后还包括：
    拍摄结束后，在取景窗口中显示所有生成的图像；
    将用户在取景窗口中选择的图像作为最终拍摄的照片存储于图像存储模块。
  8. [根据细则26改正13.10.2014]
    根据权利要求4所述的慢速快门拍摄方法，其中，所述在取景窗口中显示所述图像的步骤之后还包括：
    拍摄结束后，在取景窗口中显示所有生成的预览尺寸图像；
    将用户在取景窗口中选择的预览尺寸图像所对应的全尺寸图像作为最终拍摄的照片存储于图像存储模块。
  9. [根据细则26改正13.10.2014]　
    根据权利要求2所述的慢速快门拍摄方法，其中，所述在取景窗口中显示所述图像的步骤之后还包括：
    拍摄结束后，将取景窗口中当前显示的图像作为最终拍摄的照片存储于图像存储模块。
  10. 根据权利要求4所述的慢速快门拍摄方法，其中，所述在取景窗口中显示所述图像的步骤之后还包括：
    拍摄结束后，将取景窗口中当前显示的预览尺寸图像所对应的全尺寸图像作为最终拍摄的照片存储于图像存储模块。
  11. 一种拍摄装置，包括控制模块、拍摄模块、缓存模块、生成模块、临时存储模块和显示模块，其中：
    控制模块，设置为综合控制各模块的运行；
    拍摄模块，设置为在拍摄过程中，连续采集图像数据至缓存模块，并根据所述缓存模块的剩余空间调整采集速度；
    缓存模块，设置为缓存所述图像数据；
    生成模块，设置为根据所述图像数据连续生成图像；
    临时存储模块，设置为临时存储所述连续生成的图像；
    显示模块，设置为在取景窗口中显示所述图像。
  12. 根据权利要求11所述的拍摄装置，其中，所述拍摄模块还设置为：
    判断所述缓存模块的剩余空间是否达到预设值；
    若是，则将采集速度调整到预设速度。
  13. 根据权利要求11所述的拍摄装置，其中，所述临时存储模块包括第 一临时存储单元和第二临时存储单元；
    所述生成模块设置为：根据采集到的图像数据分别连续生成预览尺寸图像和全尺寸图像，并将所述预览尺寸图像存储至所述第一临时存储单元，将所述全尺寸图像存储至所述第二临时存储单元；
    所述控制模块设置为：将第一临时存储单元中的预览尺寸图像输出至所述显示模块予以显示。
  14. 根据权利要求11所述的拍摄装置，其中，所述显示模块设置为：在取景窗口中逐一显示所述图像，且后生成的图像覆盖先生成的图像。
  15. 根据权利要求13所述的拍摄装置，其中，所述显示模块设置为：在取景窗口中逐一显示所述预览尺寸图像，且后生成的预览尺寸图像覆盖先生成的预览尺寸图像。
  16. 根据权利要求11所述的拍摄装置，其中，所述拍摄装置还包括图像存储模块，所述显示模块还设置为：拍摄结束后，在取景窗口中显示所有生成的图像；所述控制模块还设置为：将用户在取景窗口中选择的图像作为最终拍摄的照片存储于所述图像存储模块。
  17. 根据权利要求13所述的拍摄装置，其中，所述拍摄装置还包括图像存储模块，所述显示模块还设置为：拍摄结束后，在取景窗口中显示所有生成的预览尺寸图像；所述控制模块还设置为：将用户在取景窗口中选择的预览尺寸图像所对应的全尺寸图像作为最终拍摄的照片存储于所述图像存储模块。
  18. 根据权利要求11所述的拍摄装置，其中，所述拍摄装置还包括图像存储模块，所述控制模块还设置为：拍摄结束后，将取景窗口中当前显示的图像作为最终拍摄的照片存储于所述图像存储模块。
  19. 根据权利要求13所述的拍摄装置，其中，所述拍摄装置还包括图像存储模块，所述控制模块还设置为：拍摄结束后，将取景窗口中当前显示的预览尺寸图像所对应的全尺寸图像作为最终拍摄的照片存储于所述图像存储模块。
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