KR20070010419A - Method and device for embodying osd by employing preview memory - Google Patents

Abstract

A method and apparatus for executing OSD(On Screen Display) using a preview memory are provided to execute OSD using only a memory space for preview without requiring an additional memory space for OSD so as to improve efficiency of the memory. An OSD execution instruction is inputted. OSD image information including OSD image data corresponding to the OSD execution instruction is extracted from an image storage unit. An OSD region corresponding to preview image data is recognized using the OSD image information and pixel values of the preview image data, and the OSD image data are loaded to a preview memory. The image data is displayed such that the image data corresponds to the pixel values loaded to the preview memory.

Description

Method and device for running OSD using preview memory {Method and Device for embodying OSD by employing preview memory}

1 is a view showing a method of executing an OSD according to the prior art.

2 is a block diagram showing a configuration of an image device for executing a preview and an OSD according to an embodiment of the present invention.

3 is a diagram illustrating a state in which a preview image and an OSD image are displayed according to an exemplary embodiment of the present invention.

4 illustrates a method of executing an OSD using a preview memory according to an exemplary embodiment of the present invention.

5A is a diagram illustrating a pixel configuration of a preview area according to an exemplary embodiment of the present invention.

5B is a diagram illustrating a pixel configuration of an OSD region according to an exemplary embodiment of the present invention.

6 illustrates a palette having color values of the OSD in accordance with one preferred embodiment of the present invention.

7 is a view showing a process of executing an OSD during preview execution according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

210: imaging unit

220: preview memory

230: register

240: image storage unit

250: output unit

260: input unit

270 control unit

The present invention relates to a method and apparatus for executing an On Screen Display (OSD), and more particularly, to a method and apparatus for executing an OSD using a preview memory without a separate memory.

Most modern imaging devices such as cameras or camcorders provide a preview function, which is a preview function. In addition, an OSD function is provided to provide information on cable connection, picture deletion, menu, etc. during the preview. Therefore, a preview image and an OSD image are output together on the screen, thereby requiring the efficiency of memory usage.

According to the prior art, when it is necessary to perform the OSD over the entire preview area, a memory space for the OSD of the same size as the preview is required. Hereinafter, the prior art will be described with reference to the accompanying drawings.

1 is a view showing a method of executing an OSD according to the prior art.

According to FIG. 1, the OSD execution method according to the related art requires a memory area for preview and a memory area for OSD separately. Typically, each pixel (e.g., 16 bits) 50 of the OSD region 50 has OSD region information with information about the transparency of the OSD, and R, G, B (Red, Green, Blue with information about color). ) Has information.

According to the related art, since the memory areas for the preview image and the OSD image are separately required, it does not matter if the preview image is not more than half of the memory (10), but if the preview size is larger than half of the entire memory (30) ) Has a problem that the OSD cannot be executed in the entire preview area using only the remaining memory. According to the prior art, in order to solve the above problems, it is necessary to provide a separate OSD memory or provide only a preview not more than half of the total memory. This is a problem that reduces the efficiency of the memory.

Accordingly, the present invention has been made to solve the above-described problem, and does not require a separate memory space for the OSD, OSD implementation method that can increase the efficiency of the memory by executing the OSD using only the memory space for preview and The purpose is to provide a device.

Another object of the present invention is to provide a method and apparatus for executing an OSD, which can minimize the size of a memory area required for displaying the preview image and the OSD image, and does not need to limit the size of the preview image and the OSD image. There is this.

Other objects of the present invention will become more apparent through the preferred embodiments described below.

According to an aspect of the present invention for achieving the above object, a method for executing an OSD in the image device, comprising: receiving an OSD execution command; Extracting OSD image information from the image storage unit including OSD image data corresponding to the OSD execution command; Recognizing an OSD region corresponding to preview image data using the OSD image information, and loading the preview image data and each pixel value of the OSD image data into the preview memory to correspond to each region divided according to the OSD region. Making; And a method of executing the OSD using the preview memory and displaying the recording medium corresponding to each pixel value loaded in the preview memory.

Here, the OSD region may be recognized using region information included in the OSD image information, and each pixel value of the OSD region may include the preview image data and the information about the OSD image data.

In addition, when the preview image data previously stored in the preview memory is being output, the step of receiving an OSD execution command may include: stopping output of the preview image data; And setting the OSD register bits.

In addition, each pixel of the OSD region may be recognized as type information corresponding to at least one of transparency information and palette information of the OSD image, color information of the OSD image data, color information of the preview image data, and the OSD region. OSD area information may be included.

The displaying of the pixel corresponding to each pixel value loaded in the preview memory may further include determining whether the image is an OSD region through bits having preset OSD region information of each pixel to be output. The method may further include: recognizing a palette corresponding to the type information when it corresponds to the OSD region; Recognizing an index of the palette corresponding to color information of the OSD image and extracting a corresponding color value; And outputting to correspond to the color value.

The color information of the OSD image may be set by extracting a predetermined bit among raw R, G, and B values of the preview image.

According to another aspect of the present invention for achieving the above object, an image device for executing an OSD, comprising: an image storage unit for storing image information including at least one OSD image data; A preview memory configured to load data according to the preview image data and pixel values corresponding to the OSD image data for preview and OSD execution; An input unit to receive an OSD execution command; According to the OSD execution command input through the input unit, the OSD image information is extracted from the image storage unit, and the OSD region corresponding to the preview image data to be output together using the OSD image information, and the OSD region A controller configured to load the preview image data and each pixel value of the OSD image data into the preview memory so as to correspond to each of the divided areas; And an output unit configured to display an image corresponding to a pixel value loaded in the preview memory under the control of the controller.

The apparatus may further include a register to which an OSD register bit is set, which is set under the control of the controller in response to the OSD execution command.

Hereinafter, a method and apparatus for executing an OSD using a preview memory according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings, and in the following description with reference to the accompanying drawings, the same or corresponding configuration regardless of the reference numerals. Elements are given the same reference numerals and redundant description thereof will be omitted.

2 is a block diagram illustrating a configuration of an image device for executing a preview and an OSD according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the imaging apparatus according to the present invention includes an imaging unit 210, a preview memory 220, a register 230, an image storage unit 240, an output unit 250, an input unit 260, and a control unit ( 270).

The imaging unit 210 performs a function of capturing an image or an image (hereinafter, referred to as an image). The imaging unit 210 may include, for example, a lens, an image processing module, and the like. The image recognized by the imaging unit 210 may be previewed through the output unit 250 as a preview image in real time, and the image captured by the imaging unit may be used as a preview image after being stored in the image storage unit 240. Can be. That is, the preview here includes a preview function at the time of image capturing and the screen output of the photographed picture.

The preview memory 220 performs a function of temporarily storing (ie, being loaded for output) the preview image and the data corresponding to the OSD image for preview and OSD execution. The storage method of the preview image and the OSD image in the preview memory 220 according to the present invention will be described later with reference to the accompanying drawings.

The register 230 performs a function of a temporary storage device for the operation of the controller 270 and is assigned an OSD register bit for executing the OSD execution method according to the present invention. That is, when the OSD is executed, the OSD register bits are set so that the controller 270 may recognize whether the OSD is output. That is, it is possible to recognize whether the OSD is executed through the OSD register bit, and outputs the data stored in the preview memory 220 through the output unit 250 in a corresponding output method.

The image storage unit 240 stores a OSD image or an image captured by the image capturing unit. The OSD image stored in the image storage unit 240 may have not only color information of the image, but also region information (ie, location information on the preview image) on which the OSD image is output. That is, since the OSD is typically an image which is output only to a part of the preview screen rather than being output on the full screen, according to the OSD execution method according to the present invention, the OSD image has a data structure in which the controller 270 can recognize the area of the OSD. In one embodiment, the separate area information may be stored together in the image storage unit 240.

For example, the pixels may be formed to have separate distinguishing information for each pixel so that the OSD image area and other areas can be distinguished or have area information on the OSD image area.

 The output unit 250 performs a function of displaying an image corresponding to the data loaded in the preview memory 220 under the control of the controller 270. If the color information of the image loaded in the preview memory 220 is R, G, B, the corresponding color is output through the R, G, B table, and in the case of the method using the palette, the corresponding color is displayed through the palette. Print the color. A method of setting color information using a palette and a method of recognizing a corresponding color will be described later with reference to related drawings.

The input unit 260 performs a function of receiving a preview or an OSD execution command from a user. Execution command may be input through any function button, voice recognition, etc., it is obvious that all input means can be applied.

The controller 270 performs a function of controlling the operation of each of the above-mentioned components, and in particular, the preview memory 220 according to the storage method according to the present invention by extracting the OSD image according to the OSD from the image storage unit 240 A function of loading together with the preview image is performed, and the corresponding image is output through the output unit 250.

3 is a diagram illustrating a state in which a preview image and an OSD image are displayed according to an exemplary embodiment of the present invention, and FIG. 4 is a method of executing an OSD using a preview memory according to an exemplary embodiment of the present invention. The figure shown.

As shown in FIG. 3, the preview image 300 and the OSD image 310 may overlap each other to be simultaneously displayed on one screen. Typically, the OSD image is displayed independently or overlapped with the preview image. In addition, the OSD image has a preset transparency when outputted together with the preview image. In the example shown in FIG. 3, the transparency is 0%, and the preview image and the OSD image are overlapped and output according to the transparency.

As described above, according to the related art, the preview memory 220 and the OSD memory for storing the preview image and the OSD image which are output together are separately present or may be stored in one memory, but this is limited to the preview image size. (Less than half the size of memory).

A method of executing an OSD using one memory according to the present invention will be described with reference to FIG. 4.

Before describing the OSD execution method according to the present invention with reference to FIG. 4, for example, the data stored in the preview memory 220 is stored in units of pixels of the output preview image and / or the OSD image. Will be explained.

In addition, the preview image previewed before the OSD is called a raw preview image, and the raw preview image and the OSD image displayed using the loading method (stored in the preview memory 220) according to the present invention according to the OSD execution. The superimposed image is referred to as an update preview image.

In the OSD execution method according to the present invention, by using the preview memory 220, which is a temporary storage medium in which the controller 270 loads data for outputting an image, the OSD image is superimposed and stored on the screen. It is.

According to the present invention, a method of storing the raw preview image in the preview memory 220 and a method of storing the updated preview image in the preview memory 220 are different from each other. Therefore, when the OSD execution command is input during the preview execution, the preview execution is paused and the preview memory 220 is loaded with the corresponding OSD image and the original preview image which have been previewed in a new storage manner. That is, the area in which the OSD image is output (or the area overlapping with the preview image when the OSD image has transparency) is used as the OSD area, and the part in which only the preview image is output is the preview area. Save it together. Here, when the OSD image has transparency, the pixel data of the OSD region may have not only the information of the OSD image but also the preview image information corresponding to the position. Therefore, only memory space equal to the preview image size is used.

As described above, as the method of recognizing the OSD region, a method of recognizing the OSD region by inspecting all pixels of the OSD image may be used. In addition, when storing the OSD image data in the image storage unit 240, by storing the information on the OSD area separately, the corresponding OSD region information when extracting the pixel data for any OSD image from the image storage unit 240 A method of recognizing the OSD region by extracting together may be used.

Referring to FIG. 4, the pixel-by-pixel data configuration of the raw preview image in which 5, 6, and 5-bits are allocated as color information of R, G, and B is changed according to the OSD region and the preview region according to the OSD execution. .

Referring to the drawings, the data format stored in the preview area and the OSD area will be described.

5A is a diagram illustrating a pixel configuration of a preview area according to an exemplary embodiment of the present invention, and FIG. 5B is a diagram illustrating a pixel configuration of an OSD area according to an exemplary embodiment of the present invention.

Hereinafter, the description will be given taking the example that each pixel is 16 bits, but the same or similar method may be applied even when the value of each pixel such as 8 bits and 32 bits is different. Will be.

As shown in FIGS. 5A and 5B, it is assumed that each pixel of the preview area and the OSD area has the least significant bit (LSB) of 16 bits set to have information about the OSD area. . Of course, the OSD area information may be determined as the most significant bit (MSB) or any bit. In the case of the preview region, the OSD region information has a value of 0, and in the case of the OSD region, the OSD region information has a value of 1. That is, the preview area and the OSD area are distinguished according to the value of the least significant bit that is the OSD area information.

Referring to FIG. 5A, when the preview area stores only the preview (that is, when the OSD register bits are not set), all 16 bits have color information of R, G, and B values, but when the OSD is executed. (I.e., when the OSD register bit is set) is reset, 15 bits are allocated to the area for preview information having R, G, and B values, and the remaining 1 bit is determined to be the OSD area or the preview area. The following area is allocated to the area for OSD information.

Typically, R information is assigned 5 bits, G is 6 bits, and B is 5 bits when the preview is executed, but when the OSD is executed, 4 bits are allocated to the B information and one bit is allocated to the bit having the OSD region information. . This is an embodiment of the present invention, and it is obvious that the OSD region information may use one bit allocated to R or B.

Referring to FIG. 5B, referring to the configuration of each pixel of the OSD region when the OSD region information is 1, the most significant bit (MSB: the largest digit among binary numbers) has type information. Subsequent five bits have OSD color information for representing the OSD image, each subsequent bit may be allocated such that the subsequent nine bits have preview information for representing the preview image and the remaining one bit has OSD region information.

The type information is set to be linked to the transparent information and the palette information of the OSD. According to an exemplary embodiment of the present invention, when type information is 0, transparency 0% and palette 1 are set, and when type information is 1, transparency 50% and palette 2 will be described as an example. It is obvious that the size and type of transparency other than, and the number of palettes may be differently applied according to bits allocated to the type information. That is, if the type information 2 bits are allocated, the pallet may have the information of four (i.e., 2 ^2), transparency information and four (i.e., 2 ^2).

In addition, each bit may be allocated to the transparency information and the palette information. That is, the first one bit means transparency information, and the second bit means palette information, so that transparency and palette may be configured separately.

 The former may be easy when the number of bits of the pixel is small, such as 16 bits, and the latter may be readily used when the number of bits of the pixel is large, such as 32 bits.

Here, the palette is a table for representing the color of the OSD. The OSD color information may have values of R, G, and B, but there are limitations in expressing various colors in order to have color information with small bits. Therefore, the method using the palette may be used, and thus OSD color information may be set to have an index value of the palette.

Hereinafter, a method of setting the color of the OSD through the palette and the index value will be described with reference to FIG. 6.

6 is a diagram illustrating a palette having color values of an OSD according to an exemplary embodiment of the present invention.

Referring to FIG. 6, palette 1 corresponds to the case where the type information of the OSD area pixel is 0, has color information when the transparency is 0%, and palette 2 corresponds to the case where the OSD type information is 1. It has color information when the transparency is 50%.

The index is a value of OSD color information of OSD area pixels. Therefore, if 5 bits are assigned to the OSD color information, it can have 32 (ie, 2 ⁵ ) index values, so that 32 color (R, G, B) information is set in the palette. The 32 color information will usually have a color that is used a lot in the OSD image, so that color is set in the palette.

Accordingly, the OSD image is preset and stored as an index value of the palette, and when the OSD is executed, the actual color information of the OSD may be extracted from the palette and displayed on the screen through the index value of the OSD color information.

For example, when one pixel of the OSD area has a value of 100001 ********* 1, the type information is 1, so the transparency of the OSD is 50%, and the OSD color information is 00001 (that is, the index is 1), R, G, B values of OSD are 0,255,0.

In this case, when using the palette, only the type information and the index information of the palette may be used as color information when the OSD image is generated and stored in the image storage unit 240 without setting R, G, and B values (16 bits). Total 6 bits). Therefore, the space of the image storage unit 240 according to the storage of the OSD image can be saved.

Referring back to FIG. 5B, the preview information allocated with 9 bits of the OSD region pixel has color information (R, G, B information) of the preview image. When only preview is executed, 5, 6, and 5 bits are allocated to R, G, and B bits, respectively, to have color information of the preview. When OSD is executed according to an exemplary embodiment of the present invention, the upper portions of R, G, and B are used. The 3-bit value is set to be recorded in the preview information of the OSD area. For example, when the R, G, and B values are 11011, 01100, and 00110, 9 bits of the upper 3 bits 110, 011, and 001 are stored in the preview information of the OSD region.

In general, when the OSD is executed, the portion where the preview image overlaps with the OSD image may not lack the sharpness of the preview image. Therefore, only the upper 3 bits of R, G, and B, which are original preview color information, may be used. However, the palette may be used in the same manner as the OSD image execution for a clearer preview image execution. That is, each R, G, B 3-bit value of the preview information of the OSD region pixels may be set to have an index value of a palette rather than color information. This can be applied to the same or similar to the OSD color execution method described above, so a detailed description thereof will be omitted.

Here, it will be apparent from the above description that the type information, the OSD color information, and the preview information of each pixel of the OSD region may change the number of allocated bits within 15 bits except 1 bit for the OSD region information. will be.

That is, when the total number of pixels is 16, the number of bits of type information is x, the number of bits of OSD color information is y, and the number of bits of preview information is z, x + y + z = 15. The maximum number of pallets is 2 ^x pieces.

For example, the method of storing the above-described OSD image and the preview image in the preview memory 220, the preview image information corresponding to one pixel of the OSD area is 1000011101011010, and the OSD image information is 100001 (type information and palette index Color information), the preview memory 220 stores the OSD image information and the value 1000011001111101 in which only the upper 3 bits of R, G, and B of the preview image information are set.

Hereinafter, the process of executing the OSD during the preview execution will be described with reference to the drawings.

7 is a diagram illustrating a process of executing an OSD during preview execution according to an exemplary embodiment of the present invention.

Referring to FIG. 7, a preview is executed in operation 610. That is, the preview image to be output is stored in the preview memory 220, and is output and displayed.

In operation 720, an OSD execution command is input, and accordingly, execution of the preview is stopped in operation 730. That is, since the method of data for each pixel stored in the preview memory 220 is different, the execution of the preview is paused. In addition, when the controller 270 updates the new preview image, the controller 270 sets the OSD register bit of the register to recognize that the OSD is in the running state.

In operation 740, an OSD image corresponding to the input information is extracted from the image storage unit 240. The area of the OSD image extracted in step 750 is recognized, and the preview area and the OSD area are classified accordingly. According to the OSD execution method according to the present invention, the preview image data and the updated preview image in which the OSD image data are superimposed are loaded into the preview memory 220 so as to correspond to the divided areas in operation 760.

In operation 770, the data loaded in the preview memory 220 is output to the display device. It recognizes whether it is the preview area or the OSD area through the least significant bit of each pixel where the OSD area information is set, and recognizes whether the pixel configuration and color information of the pixel are the indexes of R, G, B, or palette accordingly. Output the image according to the method.

As described above, the method of the present invention may be executed as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention.

As described above, according to the present invention, there is no need for a separate memory space for the OSD, and an OSD execution method and apparatus can be provided to increase the efficiency of the memory by executing the OSD using only the memory space for preview. It has an effect.

 In addition, it is possible to minimize the size of the memory area required for displaying the preview image and the OSD image, and to provide an OSD execution method and apparatus that does not need to limit the size of the preview image and the OSD image.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art that various modifications of the present invention within the scope without departing from the spirit and scope of the invention described in the claims below And can be changed.

Claims (11)

In the method of executing the OSD in the imaging device, Receiving an OSD execution command; Extracting OSD image information from the image storage unit including OSD image data corresponding to the OSD execution command; Recognizing an OSD region corresponding to preview image data using the OSD image information, and loading the preview image data and each pixel value of the OSD image data into the preview memory to correspond to each region divided according to the OSD region. Making; And And displaying the pixel corresponding to each pixel value loaded in the preview memory. The method of claim 1, And a preview memory for recognizing the OSD area by using the area information included in the OSD image information. The method of claim 1, And each pixel value of the OSD region includes the preview image data and information about the OSD image data. The method of claim 1, In the middle of outputting preview image data previously stored in the preview memory, The step of receiving an OSD execution command may include: stopping output of the preview image data; And Setting the OSD Register Bits OSD execution method using a preview memory further comprising. The method of claim 1, Each pixel of the OSD region may recognize type information corresponding to at least one of transparency information and palette information of the OSD image, color information of the OSD image data, color information of the preview image data, and the OSD region. OSD execution method using preview memory including area information. The method of claim 5, Displaying the pixel values corresponding to the pixel values loaded in the preview memory includes: And determining whether or not it is an OSD region by using bits having preset OSD region information of each pixel to be output. The method of claim 6, Recognizing a palette corresponding to the type information when it corresponds to the OSD region; Recognizing an index of the palette corresponding to color information of the OSD image and extracting a corresponding color value; And And outputting the color values so as to correspond to the color values. The method according to any one of claims 5 to 7, The color information of the OSD image is a method of executing an OSD using a preview memory is set by extracting a predetermined bit of the raw R, G, B value of the preview image. In the video device for executing the OSD, An image storage unit for storing image information including at least one OSD image data; A preview memory configured to load data according to the preview image data and pixel values corresponding to the OSD image data for preview and OSD execution; An input unit to receive an OSD execution command; Extract the OSD image information according to the OSD execution command input through the input unit from the image storage unit, recognize the OSD region corresponding to the preview image data to be output together using the OSD image information, according to the OSD region A controller configured to load the preview image data and each pixel value of the OSD image data into the preview memory so as to correspond to each divided region; And  An output unit configured to display an image corresponding to a pixel value loaded in the preview memory under the control of the controller OSD execution device using a preview memory including a. The method of claim 9, And a register to which an OSD register bit is set according to the control of the controller in response to the OSD execution command. In a recording medium which is tangibly embodied to be executed in an imaging device to execute an OSD, and which records a program that can be read by the imaging device, Receiving an OSD execution command; Extracting OSD image information from the image storage unit including OSD image data corresponding to the OSD execution command; Recognizing an OSD region corresponding to preview image data using the OSD image information, and loading the preview image data and each pixel value of the OSD image data into the preview memory to correspond to each region divided according to the OSD region. Making; And And displaying the pixel corresponding to each pixel value loaded in the preview memory.

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