KR101324424B1 - Apparatus and method for taking pictures in a wireless terminal - Google Patents

Abstract

The present invention is to provide an image capturing apparatus and method of a mobile terminal.

To this end, the portable terminal of the present invention captures images in the night view mode, checks pixel information of the image taken in the Mth and the images taken from the M to (M + N) th, and the M to ( Among pixels of each image taken up to M + N) th, whether pixels having brighter brightness information than pixels of the image taken in Mth exist are checked for each pixel position corresponding to each other, and photographed in the Mth Each pixel of the image is updated with pixel information of a pixel having the brighter brightness information.

Through this, the present invention has the effect that can be taken as a single image of the trajectory according to the movement of the light source, such as the movement of the constellation or the trajectory of the car passing without a high-performance camera device.

Night view mode, pixel, brightness information

Description

Image capturing device and method of mobile terminal {APPARATUS AND METHOD FOR TAKING PICTURES IN A WIRELESS TERMINAL}

1 is a block diagram of a mobile terminal according to an embodiment of the present invention;

2 is a flowchart illustrating a process of capturing an image according to an exemplary embodiment of the present invention.

3 is a first exemplary view illustrating a process of capturing an image according to an exemplary embodiment of the present invention.

4 is a second exemplary view illustrating a process of photographing an image according to an exemplary embodiment of the present invention.

5 is an exemplary view of a result of photographing an image according to an exemplary embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable terminal, and more particularly, to an image photographing apparatus and method for a portable terminal.

As the convergence of the portable terminal increases, the functions implemented in the portable terminal are diversified. One of the various functions implemented in the mobile terminal is a shooting function of the camera, through which the user takes a still picture or a moving picture. However, the image capturing function of the mobile terminal has a lot of limitations because it is equipped with a small camera module having a functional limitation in consideration of the portability and battery usage of the portable terminal. Under such a situation, photographing the trajectory of the light source by controlling the exposure time at the time of photographing is one of the representative ones that are not implemented in photographing an image using a mobile terminal. In order to photograph the trajectory of the light source, the shutter speed and the aperture of the camera must be controlled. However, implementing the same in the camera of the portable terminal has many difficulties in consideration of the mobility of the portable terminal and the mounting space of the camera module. In view of the fact that the video taken by the mobile terminal is actively used through the blog or the User Created Contents (UCC) community, the limitation of the shooting method due to the hardware limitation of the camera module provided in the mobile terminal Needs to be resolved as soon as possible.

Accordingly, the present invention provides an image capturing apparatus and method for a portable terminal capable of capturing a trajectory of a light source and the like which cannot be captured due to hardware limitations of a camera module.

According to an embodiment of the present invention, in the image capturing method of a mobile terminal, a process of capturing images in a night view photographing mode, an image taken at Mth, and an image taken from M to (M + N) th Checking the pixel information of the image, and correspondingly, among pixels of each image photographed from the M to the (M + N) th pixels, which have brighter brightness information than pixels of the M image captured therein, correspond to each other. And checking each pixel of the M-th photographed image with pixel information of the pixel having the brighter brightness information.

In accordance with another aspect of the present invention, an apparatus for photographing a mobile terminal includes a camera unit for capturing images in a night view photographing mode, an image taken in the Mth image, and an image from M to (M + N) th. Check the pixel information of the captured images, and correspond to each other whether pixels having brightness information brighter than pixels of the M-th image captured among the pixels of the M-th (M + N) -th image photographed And a controller configured to check for each pixel position to be updated, and to update each pixel of the M-th image captured by the pixel information of the pixel having the brighter brightness information.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a portable terminal according to an embodiment of the present invention.

Referring to FIG. 1, the wireless transceiver 23 includes an RF (Radio Frequency) unit and a modem. The RF unit includes an RF transmitter for up-converting and amplifying the frequency of the transmitted signal, and an RF receiver for low-noise amplifying the received signal and down-converting the frequency. A modem (MODEM) includes a transmitter for encoding and modulating a signal to be transmitted, and a receiver for demodulating and decoding a signal received by the RF unit.

The audio processing unit 25 may constitute a codec, and the codec includes a data codec and an audio codec. The data codec processes packet data and the audio codec processes audio signals such as voice and multimedia files. In addition, the audio processor 25 converts and reproduces an analog audio signal received from a modem through the audio codec or converts an analog audio signal generated from a microphone (MIC) into a digital audio signal through the audio codec. It converts and transmits to modem. The codec may be provided separately or may be included in the controller 10.

The key input unit 27 includes keys necessary for inputting numeric and character information and function keys necessary for setting various functions. At this time, the key input unit 27 includes a touch sensor, and can receive a key input through the touch of the user. The key input unit 27 according to an exemplary embodiment of the present invention includes a shooting key for capturing an image. The user may input a photographing key (in the night view photographing mode) to photograph a predetermined number of images for a predetermined time, and to automatically end photographing of the image after a predetermined time. In addition, the user may start capturing an image by inputting a photographing key (in a night view photographing mode), photograph a predetermined number of images for a predetermined time, and end photographing of the image by re-entering the photographing key.

The memory 30 may be constituted by a program memory and data memories. The program memory stores a program for controlling a general operation of the portable terminal. The memory 30 according to an embodiment of the present invention may temporarily store the captured images and store the images according to a user's storage request.

The display unit 50 outputs various display information generated in the portable terminal. In this case, the display unit 50 may be formed of a liquid crystal display (LCD) or organic light emitting diodes (OLED). In addition, the display unit may include a touch screen to operate as an input unit for controlling the mobile terminal together with the key input unit 27. Therefore, the display unit 50 according to an exemplary embodiment of the present invention may perform an operation of a shooting key for capturing an image. In addition, the display unit 50 according to an embodiment of the present invention may display respective images photographed according to the input of the photographing key, and display the finally updated image to the user.

The camera unit 60 captures an image. The camera 60 includes a camera sensor (not shown) for converting the photographed optical signal into an electrical signal, and an image processor (not shown) for converting the analog image signal photographed from the camera sensor into digital data. The camera sensor may be implemented by a CCD sensor or a CMOS sensor, and the image processor may be implemented by a digital signal processor (DSP) or an image signal processor (ISP). In this case, the camera sensor and the image processing unit may be implemented as an integrated type or a separate type.

The controller 10 switches and controls the overall operation or drive mode of the portable terminal. The control unit 10 according to an embodiment of the present invention captures a predetermined number of images (eg, N + 1 images photographed from Mth to M + Nth) according to the input of the photographing key. Subsequently, the controller 10 compares the pixel information of each of the images taken after the Mth with the pixel information of each of the images taken after the Mth, and compares the pixel information of the Mth image captured with the Mth image. The pixel information of the pixels having higher brightness than the image is checked, and the pixel information of the pixels having higher brightness than the image taken in the Mth is updated to the pixel information of the image taken in the Mth. A detailed description thereof will be described in detail with reference to FIGS. 2 to 5 below.

2 is a flowchart illustrating a process of capturing an image according to an exemplary embodiment of the present invention.

3 is a first exemplary view illustrating a process of capturing an image according to an exemplary embodiment of the present invention, in which light sources moving in the order of 310-> 320-> 330-> 340 are shown in FIGS. b)-> (c)-> (d) in this order. FIG. 4 is a second exemplary view illustrating a process of capturing an image according to an exemplary embodiment of the present invention. An example of updating the image of FIG. 3A through the images of FIGS. 3B through 3D is illustrated in FIG. It is shown. 5 is an exemplary diagram of a result of capturing an image according to an exemplary embodiment of the present invention.

Referring to Figures 2 to 5 for the process of taking an image according to an embodiment of the present invention.

Referring to FIG. 2, when entering the night view photographing mode is requested (S201), and when a photographing key is input (S202), the controller 10 captures a predetermined number of images (from M to (M + N)). It is controlled to (S203).

In the night view mode where the light source (for example, a light or a car's light) can be photographed, the user can enter the M to (M + N) th image (ie, N +) through the input of the shooting key. 1 video) can be taken. At this time, the control unit 10 according to an embodiment of the present invention, if the shooting key is input once, when taking a picture from the M to the (M + N) th predetermined time period for a predetermined time, or if the shooting key is input It is possible to control to take the M-th image and to shoot the M to M + N-th image at a predetermined time interval until the shooting key is re-entered. For example, with reference to FIG. 3, when the photographing key is input, the controller 10 starts recording of the M-th image as shown in FIG. It is possible to control to capture an image of the (M + 3) th (that is, when N is 3) shown. In addition, the controller 10 captures the image shown in (b) and (c) of FIG. 3 at a predetermined time interval after taking the image shown in FIG. At the time of input, it may be controlled to capture the image of FIG.

When the photographing is completed, the controller 10 checks pixel information of the M photographed image and each image photographed after the M th (S204).

The pixel information of pixels constituting each captured image includes color information, pixel position information, and the like. The color information of the pixel information provides hue, hue, saturation, and brightness. By checking the pixel information, the control unit 10 according to an embodiment of the present invention confirms the brightness information of the pixels of the four photographed images shown in (a) to (d) of FIG. For example, the controller 10 may determine that the image of FIG. 3 (a) is photographed as the light source is located at 310, so that brightness information of at least one pixel constituting the location of 310 is brighter than other pixels. Can be. Similarly, the controller 10 may determine that the image of FIG. 3B is 320, the image of FIG. 3C is 330, and the image of FIG. 3D is 340 of at least one pixel. It can be seen that the brightness information is brighter than other pixels.

Thereafter, the controller 10 checks whether there is a brighter pixel than the pixel of the M-th photographed image for each pixel position corresponding to each other among the pixels of the image photographed after the M-th (S205).

For example, the image shown in (a) of FIG. 3 is not captured as the light source is moved to the position of 320 as shown in (b) of FIG. The pixel (or pixels) constituting the position 320 (that is, the position corresponding to 320 in FIG. 3B) is darker (the brightness is smaller) than the image photographed in FIG. 3B. That is, in the image illustrated in FIG. 3B, at least one pixel constituting the position of 320 has brighter (higher) brightness information than in FIG. 3A. As a result, the controller 10 may include a pixel corresponding to at least one pixel constituting a position of 320 in FIG. 3B, a position in FIG. 3C in 330, and a position in FIG. 3D in 340. It is confirmed that each position has higher brightness information than the pixel of the image shown in FIG.

Thereafter, the controller 10 controls to update the pixel information of the bright (higher brightness information) pixel to the corresponding pixel of the M-th photographed image (S206).

For example, the controller 10 shows pixel information of at least one pixel constituting the 320 position of the image shown in (b) of FIG. 3 taken at the (M + 1) th in FIG. 3 (a). Control to update the corresponding pixel of the image, and the result is as shown in FIG. Thereafter, the controller 10 updates pixel information of at least one pixel constituting the position 330 of the image shown in (c) of FIG. 3 taken at (M + 2) th as shown in (a) of FIG. 4. Control to update to the corresponding pixel of the image, the result is as shown in Fig. 4 (b). In the same manner, the controller 10 updates the pixel information of the pixel (or pixels) constituting the position 340 of FIG. 3D to the updated image as shown in FIG. Acquire an image like c). As a result, FIG. 4C shows that the moving light source is reconfigured as if it was captured in one image. 4 (c) of FIG. 4 shows that the light source and the light source are not connected by explaining an embodiment of the present invention through four images of M to (M + 3) (that is, when N is 3), As the number of N increases, the acquired image will be closer to the image as shown in FIG. In this embodiment of the present invention, by acquiring an image similar to (or the same as) the image of photographing the trajectory of the light source with a high performance camera, an image such as (a) and (b) of FIG. 5 can be obtained without a high performance camera device. It becomes possible.

According to the embodiment of the present invention, in updating (b) to (d) of FIG. 3 to (a) of FIG. 3, the photographing sequence is as shown in (b)-> (c)-> (d) of FIG. Although updated, the brightness information may be compared and updated using the pixel information regardless of the photographing order.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of example, It is to be understood that within the scope of the appended claims the invention may be practiced otherwise than as specifically described herein. For example, in an embodiment of the present invention, the pixels of the captured images are compared and updated according to the input of the photographing key, but the pixels of the images selected by the user among the stored images may be compared and updated.

As described above,

The present invention has the effect that can be taken as a single image of the trajectory according to the movement of the light source, such as the movement of the constellation or the trajectory of the car passing without a high-performance camera device.

In addition, the present invention has the effect of setting a unique special effect on the captured image by checking the pixel information of the image selected by the user and updating the brightness information.

Claims (10)

In the video photographing method of the mobile terminal, Taking pictures in night view mode, Checking pixel information of the M-th image and the M-to- (M + N) -th image, Checking, for each pixel position corresponding to each other, whether there is a pixel having brightness information brighter than the pixel of the image taken in the Mth among pixels of the image taken from the M to (M + N) th images; And updating each pixel of the M-th image captured by the pixel information of the pixel having the brighter brightness information. The method of claim 1, wherein the capturing the images comprises: Entering the night view mode according to the request of the night view mode; And when the photographing key is input in the night view photographing mode, capturing the M to (M + N) th images at a predetermined time period for a preset time. The method of claim 1, wherein the capturing the images comprises: Entering the night view mode according to the request of the night view mode; Photographing the M-th image according to an input of a photographing key, and photographing the images from M to (M + N) th at predetermined time periods until the photographing key is re-entered. Image capturing method of a mobile terminal. The method of claim 1, wherein the updating is performed. Among the pixels of the (M + 1) th image, pixel information of a pixel having higher brightness information than the pixel of the Mth image captured for each pixel position is assigned to the pixel of the image taken of the Mth image. The first renewal process to update, Among the pixels of the (M + 2) th image, the first update of pixel information of a pixel having higher brightness information than the pixel of the Mth shot image updated in the first update process for each corresponding pixel position A second update process of updating the pixels of the M-th captured image, Repeating the first and second update processes from the (M + 3) th image to the (M + N) th image, and updating the Nth pixel of the Mth image. Image capturing method of a mobile terminal comprising a. The method of claim 1, wherein the updating is performed. Randomly selecting any one of images taken from the M to (M + N) th images; And updating a pixel having higher brightness information than the pixel of the M-th image photographed for each pixel position among the pixels of the randomly selected image to the pixel of the M-th image. Image capturing method of a mobile terminal. In the video photographing device of a mobile terminal, A camera unit for capturing images in night view mode, The pixel information of the M-th image and the M-to-M + N-th image is checked, and among the pixels of the M-to-M + N-th image, To determine whether there is a pixel having brighter brightness information than the pixel of the captured image for each pixel position corresponding to each other, and to update each pixel of the M-th image captured with pixel information of the pixel having the brighter brightness information. And a control unit for controlling the image photographing apparatus of the mobile terminal. 7. The apparatus of claim 6, And a photographing key is input to control photographing of the M to (M + N) th images at a predetermined time period for a predetermined time period. 7. The apparatus of claim 6, The photographing key captures the M-th image according to an input, and controls to photograph the M to (M + N) -th images at a predetermined time interval until the photographing key is input again. Imaging device of the terminal. 7. The apparatus of claim 6, The pixel information of the pixel having brightness information that is brighter than the pixel of the M-th image captured by the corresponding pixel position in the order of photographing among the pixels of each image taken from the M to (M + N) -th images is recalled. An image capturing apparatus of a mobile terminal, characterized in that it is controlled to update each pixel of the image taken in the Mth. 7. The apparatus of claim 6, If any one of the images taken from the M to the (M + N) th images is randomly selected, higher than the pixel of the image taken at the Mth for each pixel position among the pixels of the randomly selected image. And updating the pixel having the brightness information to the pixel of the image taken in the M-th.

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