KR100222971B1 - Apparatus for high definition image scanner using 3 sensor - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-panel high-resolution imaging device, and an object thereof is to provide a high-resolution imaging device using a three-panel imaging device equipped with an image sensor of normal resolution.

In order to achieve the object of the present invention, in the image pickup apparatus using a three-plate image sensor, the pixel position of the red image sensor and the blue image sensor corresponding to the pixel position of the green image sensor 1 pixel in the vertical direction Intersect by pitch and allow adjacent green signals to share red and blue signals in either the radix field or the even field, and red and blue signals or green signals that do not exist on the same scan line in another field According to the three-plate type high resolution imaging apparatus according to the present invention which forms a scanning line by linearly interpolating pixels adjacent to each other, the distance between pixels can be kept uniform during line interpolation, and the conventional three-plate color separation optical system Without distortion and at the same time without additional image sensors The image sensor of FIG. Can implement an image pickup device for a high resolution HDTV.

Description

3-plate high resolution imaging device.

화소 피치 만큼 교차시켜 배치하고, 기수 필드와 우수 필드 중 어느 하나의 필드에서 적색 및 청색 신호를 인접한 녹색 신호가 공유하게 하고, 또 다른 필드에서는 동일 주사 라인 상에 존재하지 않는 적색 및 청색 신호 또는 녹색 신호를 상하에 인접한 화소를 보간(interpolation)하여 주사 라인을 형성함으로써 촬상 장치의 해상도를 높이는 3판식 고해상도 촬상 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-panel high resolution imaging device, comprising: a red image sensor and a blue image in an imaging device having a normal resolution three-plate image sensor composed of a red image sensor, a green image sensor, and a blue image sensor. The pixel position of the sensor is crossed by one pixel pitch in the vertical direction corresponding to the pixel position of the green image sensor.

Intersect by pixel pitch and allow adjacent green signals to share red and blue signals in either the odd or even fields, and red and blue signals or green that do not exist on the same scan line in another field The present invention relates to a three-plate type high resolution imaging device which raises the resolution of an imaging device by forming a scanning line by interpolating pixels adjacent up and down.

Commonly referred to as next-generation TV, HDTV has been developed into color TV, enhanced definition television (EDTV), and HDTV since the Federal Communications Committee (FCC) decided in 1941 the black and white TV system.

The color TVs currently used around the world include the National Television System Committee (NTSC) method used in Korea, the United States, and Japan, and the Phase Alternation by Lines (PAL) method and SECAM (Sequential Color Memories) used in Europe. There is a method, but based on the black and white TV technology of the 40s, the basic standard is determined and is used until now.

Improved Definition TV (IDTV), which appeared before HDTV, is a TV with a function that can improve the function of a general color TV receiver and provide a clearer screen to viewers, and sequentially scans the interlaced scan method of a general color TV. It adds the ability to switch to progressive scan and display or remove ghosts.

On the other hand, EDTV (Enhanced Definition TV) is a TV system that enhances the realism by increasing the aspect ratio to 9:16 like a movie based on the existing color TV system.

However, as both IDTV and EDTV do not escape the fundamental limitations of the current TV system, an attempt has been made to see a clearer image on a larger screen beyond the limitations of the current color TV system and HDTV has emerged in such an attempt.

The present invention is directly directed to the aspect ratio and resolution of a photoelectric conversion imaging device (ie, a photoelectric conversion camera) that photoelectrically converts an optical image and captures an electrical signal on an image sensor to provide to an imaging system. As will be described, the necessity of the present invention will be briefly described as an example of the representative color television system NTSC system and the representative HDTV system GA-HDTV (Grand Alliance HDTV) system.

NTSC screen aspect ratio with interlaced scanning and 525 scan lines and 30 fps (flame per second), which is used as a television standard in Korea, North America and Japan, is 4: 3

On the other hand, HDTV (High Definition TeleVision), commonly called next-generation TV, sets the aspect ratio to 16: 9 to extend the visual presence and vividness of the screen by expanding the visual area based on human visual characteristics. For example, in the United States, the GA-HDTV (Grand Alliance HDTV) has a resolution of 1920 pixels x 1080 pixels per frame. As a result, "HDTV has more than twice the vertical and horizontal resolution than current TVs. It improves the problems of current TVs such as (cross color), has a wider aspect ratio of 16: 9 than the current TVs, and has digital audio performance at the level of CD (Compact Disk) sound quality. ”ITU-RS (International Telecommunication Union) It satisfies some definition of RS).

As described above, GA-HDTV, which is an example of HDTV, requires about 2 times or more scanning players than the NTSC method even if only the horizontal resolution is simply compared, so that a high-density image sensor capable of providing the resolution may be provided. image sensor), ie, a high resolution CCD is required.

However, considering the current level of technology for CCD, CCDs satisfying the specifications of HDTV are very expensive, and therefore, there are many problems when providing them in a low-cost type. That is, high resolution requires high-speed signal processing, large power consumption, and peripheral devices also require high technical difficulty, and these factors are directly related to the price of the product, causing a large economic burden on the user. There is.

Due to these problems, it was common to expect that a large amount of time would be required for the imaging apparatus for HDTV to be widely used, but recently, a number of apparatuses and methods are known which can satisfy the resolution for HDTV using a CCD having a normal resolution. have.

For example, there is a method proposed in Japanese Patent Application No. Hei 5-78730, which is a kind of method for obtaining a high-resolution image signal for Hi-Vision. By dividing the green signal in each of the separated image separated into red, green, blue (R, G, B), and receives by the PAL image sensor, respectively. At this time, the image sensor of the green signal is arranged to cross one pixel in the vertical direction, and at the same time, masking is performed on the light receiving unit of each pixel to obtain a double vertical resolution.

However, this method has a problem in that the amount of received light is halved because the opening of each pixel constituting the image sensor masks about half up and down, and thus the sensitivity is also lowered.

Japanese Patent Application No. Hei 7-327233 " imaging apparatus and image signal processing apparatus " proposed and known in view of such a problem and a technical background are related to the technical background of the present invention, and the present invention is referred to here. Shall be.

Japanese Patent Application No. Hei 7-327233 "imaging device and image signal processing device" is a blue image sensor, a red image sensor, a first green image sensor, a second green image sensor using a conventional image sensor that is widely used at present. A four-panel imaging device was formed.

화소 피치 만큼 수직 방향으로 교차시켜 배치하는 데, 이와 같이 청색 이미지 센서(DB) 및 적색 이미지 센서(DR)의 화소 위치를 제 2 녹색 이미지 센서(DG2)에 대응하여

화소 피치 만큼 수직 방향으로 엇갈려 배치함으로써 수직 방향에 대한 해상도의 향상을 기할 수 있다.Fig. 1 (A) to (C) Japanese Patent Application No. Hei 7-327233 shows a pixel arrangement diagram of an "imaging apparatus and an image signal processing apparatus", and an effective scanning player corresponding to an HDTV using a CCD having a normal resolution. As shown in FIG. 1 (A), 4, which is composed of a blue image sensor DB, a red image sensor DR, a first green image sensor DG1, and a second green image sensor DG2. In the plate type CCD, the pixel positions of the blue image sensor DB and the red image sensor DR correspond to the second green image sensor DG2.

The pixel pitches of the blue image sensor DB and the red image sensor DR are arranged in the vertical direction by the pixel pitch so as to correspond to the second green image sensor DG2.

By staggering in the vertical direction by the pixel pitch, the resolution in the vertical direction can be improved.

화소 피치 만큼 교차시켜 배치한다.On the other hand, as shown in Fig. 1B, the pixel position of the first green image sensor DG1 is arranged by crossing one pixel pitch in the vertical direction with respect to the pixel position of the second green image sensor DG2. In addition, as shown in FIG. 1C, the pixel position of the first green image sensor DG1 and the pixel position of the second green image sensor DG2 are horizontally aligned.

The pixels are arranged to cross each other by the pixel pitch.

화소 피치 만큼 교차시켜 배치함으로써 수평 방향에 대한 해상도의 향상을 기할 수 있다.As such, the pixel position of the first green image sensor DG1 and the pixel position of the second green image sensor DG2 are horizontally aligned.

By arranging to cross by the pixel pitch, the resolution in the horizontal direction can be improved.

Then, the field image signal obtained from the green image sensors DG1 and DG2 by extracting the high frequency component in the vertical direction from the image signals obtained from the blue image sensor DB and the red image sensor DR in which the pixel positions are arranged. The present invention is directed to improving the vertical resolution without causing a decrease in the aperture ratio due to the mask treatment.

However, Japanese Patent Application No. Hei 7-327233 "imaging apparatus and image signal processing apparatus" and Japanese Patent Application No. Hei 5-78730 mentioned above as the prior arts refer to a double green image sensor (i.e., a first green image sensor; In terms of economics, it is accompanied by an absolute price increase factor compared to a three-panel imaging device using a single green image sensor.

That is, the four-plate imaging device requires another green image sensor as compared to the three-plate imaging device, and a new color separation optical system capable of supporting the four-plate imaging device is required.

In particular, the above-described Japanese Patent Application No. Hei 7-327233 "imaging device and image signal processing device" has a high-pass component in the vertical direction in the video signal obtained from the blue image sensor DB and the red image sensor DR as described above. Since there is a need for a plurality of line memories and field memories for extracting the field image signals obtained from the green image sensors DG1 and DG2 by extracting them, there is a problem in that an additional burden directly related to the price of the product is required.

Although this partly satisfies the intention of implementing a high resolution imaging device using a CCD having a high resolution, at the same time, it is cost-effective to provide a low-cost HDTV imaging device by providing practicality and economic efficiency by lowering the price of the product. As a result of this remnant, there is a problem that the production price of the product cannot be lowered below a certain value.

Korean Patent Application No. 96-44013, "High Resolution Imaging Device Using 3-Plate Image Image Sensor," proposed and applied to solve such a problem, is directly related to the background of the present invention. Reference is made herein to the gist of FIG. 3A-3C.

FIG. 2 is a pixel arrangement diagram showing an embodiment of a pixel arrangement used in Korean Patent Application No. 96-44013, "High Resolution Imaging Device Using a 3-Plate Image Sensor."

화소 피치 만큼 교차시켜 배치한다.Korean Patent Application No. 96-44013, "High Resolution Imaging Device Using 3-Plate Image Sensor," as shown in FIG. 2, shows a blue image sensor (DB), a red image sensor (DR), and a green image sensor (DG). In a three-plate CCD comprising a pixel having the red image sensor DR and the blue image sensor DB, a green image sensor DG is used to obtain an effective scanning player equivalent to an HDTV using a CCD having a normal resolution. In the vertical and horizontal directions

The pixels are arranged to cross each other by the pixel pitch.

3A illustrates the pixel positions of the red image sensor DR, the blue image sensor DB, and the green image sensor DG in the odd field unit, FIG. 3B in the even field unit, and FIG. 3C in the unit of frame. In interlaced scanning, pixels scanned in the odd field are indicated by solid rectangles, and pixels scanned in the even field are indicated by dotted rectangles. In addition, in order to facilitate pixel identification, an index is given for each pixel, where the green signal is represented by "G _mn " and the red and blue signals are represented by "R _mn / B _mn ".

Here, the subscript "m" of G _mn and R _mn / B _mn is an index for pixel positions in the vertical direction, and the subscript "n" is an index for pixel positions in the horizontal direction. For convenience of explanation, it is assumed that m is an odd-numbered odd field and m is an even-numbered even field.

In this case, an even pixel may be considered as even field as described above, but when m is odd, the pixel of the current field may be regarded as a pixel one field before the current field. You may.

3A to 3C, the space between the solid line and the solid line and the space between the dotted line and the dotted line are one pixel pitch, and the space between the solid line and the dotted line is half pixel pitch.

화소 피치 만큼 엇갈려 배치하고, 적색 및 청색 채널용 라인 메모리를 구비한 본 발명의 영상 신호 합성 장치를 이용하여 적색 및 청색 신호를 동일 필드 내의 인접 주사 라인에 존재하는 녹색 신호로 하여금 공유하게 함으로써 수직 주사 라인수를 배가시킨다.As such, the pixel positions of the red image sensor and the blue image sensor correspond to the green image sensor.

Vertical scanning by staggering pixel pitches and allowing the red and blue signals to share the green signals present in adjacent scan lines in the same field using the image signal synthesizing apparatus of the present invention having line memories for the red and blue channels. Double the number of lines.

However, in US Patent Application No. 96-44013, "High Resolution Imaging Device Using a 3-Plate Image Image Sensor," which was filed by the applicant of the present invention, as described above, the distance between pixels at the time of line interpolation is not uniform due to the pixel arrangement characteristics. As a result, the resolution representation of the interpolated line data is insufficient.

Accordingly, the present invention has been made to solve such a problem, and is widely distributed to the current user, and in the imaging device using a three-plate image sensor which is technically low in terms of producers, a four-plate image sensor is used. Compared to the imaging device used, a certain image quality deterioration should be tolerated. However, the economical burden is significantly reduced. The conventional color separation optical system that supports the three-plate CCD imaging device is used, and an additional scanning line is set for image stabilization. CCD with normal resolution of normal resolution CCD or PAL type, line memory for RGB, line memory for red and cyan signal interpolation unit, and red and blue signals in either field of radix field or even field are adjacent to green signal Are shared, and in another field red and not on the same scan line To provide a high-resolution three-panel imaging device to increase the resolution of the image sensing apparatus, by forming the scan line the green color signal or the signal by linearly interpolating the adjacent pixels above and below it is an object.

1 is a layout view of pixels of Japanese Patent Application No. Hei 7-327233, "A photographing apparatus and an image signal processing apparatus",

FIG. 2 is a pixel arrangement diagram showing an embodiment of a pixel arrangement used in Korean Patent Application No. 96-44013, "High Resolution Imaging Device Using a 3-Plate Image Sensor."

3A, 3B and 3C show the pixel positions of the red image sensor, the blue image sensor, and the green image sensor of the Korean Patent Application No. 96-44013, "High Resolution Imaging Device Using a 3-Plate Image Image Sensor," in the radix field unit, respectively. The layout diagram summed in units of fields and frames,

Fig. 4 is a block diagram showing an embodiment of a color separation optical system of Japanese Patent Application No. Hei 7-327233 "imaging apparatus and image signal processing apparatus",

5 is a pixel layout view showing an embodiment of a pixel layout used in the present invention;

6A to 6C are layout views showing the sum of pixel positions of a red image sensor, a blue image sensor, and a green image sensor according to an embodiment of the pixel arrangement used in the present invention in odd field units, even field units, and frame units, respectively;

7 is a pixel layout view showing still another embodiment of the pixel layout used in the present invention;

8 is a block diagram showing a three-plate high-resolution imaging device according to the present invention;

9 is an exemplary diagram showing a red-green-blue signal output state of each main part of FIG. 8;

* Explanation of symbols for main parts of the drawings

100: image sensor unit 110: red image sensor

120: green image sensor 130: blue image sensor

200: line memory unit for time compression 210: red line memory for time compression

220: Line memory for blue time compression 230: Line memory for green time compression

300: time delay line memory unit 310: red time delay line memory

320: Blue time delay line memory 330: Green time delay line memory

400: red-green signal interpolator 410: red signal interpolator

420: blue signal interpolator 430: green signal interpolator

500: signal selection unit 600: red green and blue signal synthesis unit

In order to achieve the above object, the three-panel high resolution imaging device according to the present invention is a red image sensor, a blue image sensor, and a green image sensor having a normal resolution of a CCD or PAL method of a normal resolution in which an additional scanning line is set for image stabilization. In an imaging device having:

화소 피치 만큼 각각 교차시켜 배치하며, 상기 적색 이미지 센서 및 상기 청색 이미지 센서을 상기 녹색 이미지 센서에 대해

주사 라인 기간 동안 지연시켜 구동하는 이미지 센서부;The pixel positions of the red image sensor and the blue image sensor are disposed to cross each other by one pixel pitch in the vertical direction corresponding to the pixel positions of the green image sensor, and in the horizontal direction.

And intersect each pixel pitch, and the red image sensor and the blue image sensor with respect to the green image sensor.

An image sensor unit driving by delaying the scan line period;

The image sensor unit receives the output of each image sensor according to the first sampling clock, which is the inverse of the single scan line period, and writes the output of each image sensor to each time compression line memory and doubles the frequency of the first sampling clock to double the line. A time compression line memory unit configured to repeatedly output each scan line unit twice according to a second sampling clock;

주사 라인 기간 동안 지연시켜 출력하는 시간 지연용 라인 메모리부;The output of each time compression line memory is input through each time delay line memory according to the second sampling clock.

A time delay line memory unit for delaying and outputting the scan line period;

A red cyan signal interpolator for receiving the output of the respective time compression line memory and the output of the respective time delay line memory according to the second sampling clock and interpolating through the respective signal interpolators to output the interpolated signals;

The output of the time delay line memory unit is selected and output from the first field, which is one of an odd field and an even field, and the output of the red-green signal interpolation unit is selected from the second field, which is another field. An output signal selector; And

And a red cyan signal synthesizing unit which receives the output of the signal selection unit in the first field and the second field and sequentially synthesizes the red cyan composite signal according to the second sampling clock.

Hereinafter, a three-plate type color separation optical system that is a color separation optical system used in the present invention will be described based on Japanese Patent Application No. Hei 7-327233 "imaging apparatus and image signal processing apparatus".

Fig. 4 is a configuration diagram showing an embodiment of a color separation optical system of Japanese Patent Application No. Hei 7-327233 "imaging apparatus and image signal processing apparatus".

The blue light prism 10 for obtaining the blue light component B is disposed on the light input side, and the red light prism 12 for obtaining the red light component R is disposed on the light output side of the blue light prism 10. . On the light output side of the red light prism 12, a green light prism 14 for obtaining a green light component G is disposed, and on the green light prism 14, a semi-reflective mirror 16 is disposed with respect to the incident optical axis. It is installed at an angle of 45 °. That is, the green light prism 14 is separated into the first green light prism 16A and the second green light prism 16B with the semi-reflective mirror 16 as a boundary.

Accordingly, the blue light component B and the red light component R are imaged in the blue image sensor DB and the red image sensor DR through the blue trimming filter 11_1 and the red trimming filter 12_1, respectively. The first green light component G1 and the second green light component G2 may be connected to the first green image sensor DG1 and the second green image through the first green trimming filter 16_1 and the second green trimming filter 16_2, respectively. It forms in the sensor DG2.

In this case, an image forming surface formed by the first green image sensor DG1 and the second green image sensor DG2 is 90 ° to each other, so that the first green light component G1 imaged on the first green image sensor DG1 is second. The left and right are inverted with respect to the second green light component G2, the blue light component B, and the red light component R formed in the green image sensor DG2. Use frame memory or the like.

Meanwhile, in the present invention, as described above, the conventional three-plate color separation optical system supporting the three-plate image sensor is used. In the four-plate color separation optical system of FIG. 4, the first green trimming filter 16_1 and the anti-reflection mirror 16 are used. When the first green image sensor DG1 is removed, a general three-plate color separation optical system is provided. This means that the green light prism 14 that has been separated into the first green light prism 16A and the second green light prism 16B on the basis of the semi-reflective mirror 16 is used solely for a single green light.

In other words, the use of four-plate color separation optical system requires another green image sensor as compared to the three-plate color optical system, and there is an additional burden of requiring a new color separation optical system capable of supporting this.

Further details on the above are described in "Development of 4 CCD Comsumer Use Hi-Vision Camera" and Japanese Patent, published in Japanese Journal of Television, Vol. 50, No. 50, 1996. Reference is made to application No. 7-327233 "imaging apparatus and image signal processing apparatus".

5 is a pixel layout view showing an embodiment of the pixel layout used in the present invention.

화소 피치 만큼 교차시켜 배치한다.One embodiment of the pixel arrangement used in the present invention is a conventional three-plate CCD consisting of a blue image sensor (DB), a red image sensor (DR), a green image sensor (DG), as shown in FIG. In order to obtain an effective scanning player equivalent to an HDTV using a CCD having a resolution, the pixel position of one of the red image sensor DR and the blue image sensor DB is moved in the vertical direction corresponding to the green image sensor DG. Are arranged by crossing the pixel pitch, and in the horizontal direction

The pixels are arranged to cross each other by the pixel pitch.

화소 피치 만큼 교차시켜 배치하는 것이 바람직하다.At this time, the pixel positions of both the red image sensor DR and the blue image sensor DB are disposed to cross each other by one pixel pitch in the vertical direction corresponding to the green image sensor DG, and in the horizontal direction.

It is preferable to arrange them by crossing the pixel pitch.

FIG. 6A illustrates the pixel positions of the red image sensor DR, the blue image sensor DB, and the green image sensor DG in the odd field unit, FIG. 6B in the even field unit, and FIG. 6C in the unit of frame. In interlaced scanning, pixels scanned in the odd field are indicated by solid rectangles, and pixels scanned in the even field are indicated by dotted rectangles. 6A to 6C, the interval between the solid line and the solid line and the interval between the dotted line and the dotted line are one pixel pitch, and the interval between the solid line and the dotted line is half pixel pitch.

In this way, the pixel positions of the red image sensor and the blue image sensor are alternately arranged in correspondence with the green image sensor, and the red and blue signals are the same field by using the image signal synthesizing apparatus of the present invention having the line memories for the red and blue channels. The number of vertical scan lines is increased by allowing the green signals present in adjacent scan lines in the circuit to share.

In principle, each signal related to red, green, and blue (R, G, and B) is required to configure one color pixel. However, in the present invention, when the pixel arrangement in units of scan lines is used, economical use of resources is avoided. In order to increase the resolution, the resolution is provided by using the number of pixels that are substantially smaller than the required number of pixels, which means that in terms of the resolution, it provides pseudo-resolution using a complementary relationship between adjacent pixels. .

7 is a pixel layout view showing still another embodiment of the pixel layout used in the present invention.

Another embodiment of the pixel arrangement used in the present invention is a three-plate CCD consisting of a blue image sensor DB, a red image sensor DR, and a green image sensor DG, as shown in FIG. In order to obtain an effective scanning player equivalent to HDTV using a CCD having a resolution of, the pixel position of either the red image sensor DR or the blue image sensor DB is moved in the vertical direction corresponding to the green image sensor DG. The pixels are crossed by one pixel pitch.

In this case, the pixel positions of both the red image sensor DR and the blue image sensor DB may be disposed to cross each other by one pixel pitch in the vertical direction corresponding to the green image sensor DG.

Hereinafter, a description will be given with reference to FIG. 8 to which a three-plate type high resolution image pickup device according to the present invention including an image sensor having the pixel arrangement as described above is attached.

화소 피치 만큼 각각 교차시켜 배치하며, 상기 적색 이미지 센서(110) 및 상기 청색 이미지 센서(120)를 상기 녹색 이미지 센서(130)에 대해

주사 라인 기간 동안 지연시켜 구동·출력하는 이미지 센서부(100);According to the present invention, as shown in Fig. 8, the three-plate type high resolution image pickup apparatus uses a three-plate type image sensor using a CCD having a normal resolution of a normal resolution or a PAL type with an additional scanning line set for image stabilization. A red image sensor 110 that picks up a red image and generates a red signal, a green image sensor 120 that picks up a green image and generates a green signal, and a blue signal by picking up a blue image A blue image sensor 130 generating a pixel pitch of the red image sensor 110 and the blue image sensor 120 in a vertical direction corresponding to the pixel position of the green image sensor 130. And cross each other by

The pixels are arranged to cross each other by a pixel pitch, and the red image sensor 110 and the blue image sensor 120 are disposed with respect to the green image sensor 130.

An image sensor unit 100 which drives and outputs a delay during the scanning line period;

The red signal is received from the red image sensor 110 according to the first sampling clock, which is the inverse of the single scanning line period, and is recorded, and the second sampling clock has twice the frequency of the first sampling clock to double the line. The red time compression line memory 210 repeats twice in a line unit and outputs the red signal in the order of the first red signal and the second red signal and the blue signal from the blue image sensor 120 according to the first sampling clock. A blue time compression line memory 220 for inputting, recording, and outputting the first blue signal and the second blue signal in order of repeating the scan line twice through the second sampling clock to double the line; The green signal is inputted from the green image sensor 130 according to a sampling clock, and the green signal is inputted through the second sampling clock to double the line. Twice repeating a four-line basis by a first green signal and a second green signal time compression pure green line of the time lines for the memory compression portion 200 includes a merori 230 for output to;

주사 라인 기간 동안 지연시켜 출력하는 적색 시간 지연용 라인 메모리(310)와, 상기 제 1 청색 신호 및 상기 제 2 청색 신호를 입력받아

주사 라인 기간 동안 지연시켜 출력하는 청색 시간 지연용 라인 메모리(320)와, 상기 제 1 녹색 신호 및 상기 제 2 녹색 신호를 입력받아주사 라인 기간 동안 지연시켜 출력하는 녹색 시간 지연용 라인 메모리(330)를 구비하여 상기 제 2 샘플링 클럭으로 구동되는 시간 지연용 라인 메모리부(300);Receiving the first red signal and the second red signal

A red time delay line memory 310 which delays and outputs a scan line period, and receives the first blue signal and the second blue signal.

A blue time delay line memory 320 for delaying and outputting the scan line period and the first green signal and the second green signal are received. A time delay line memory unit 300 having a green time delay line memory 330 for delaying and outputting the scan line period and driving the second sampling clock;

According to the second sampling clock, the output of the red time compression line memory 210 and the output of the red time delay line memory 310 are input, and the first red signal of the current scan line and the second of the current scan line are received. A red signal interpolation unit 410 for outputting a first red interpolation signal interpolated with a red signal and then outputting a second red interpolation signal interpolated with a second red signal of a current scan line and a first red signal of a subsequent line; The first blue signal of the current scan line and the first scan signal of the current scan line are received through the output of the blue time compression line memory 220 and the output of the blue time delay line memory 320 through the second sampling clock. A blue signal interpolation unit 420 that outputs a first blue interpolation signal interpolating two blue signals and then outputs a second blue interpolation signal interpolating a second blue signal of the current scan line and a first blue signal of a subsequent line Wow The first green signal of the current scan line and the second green of the current scan line are received through the output of the green time compression line memory 230 and the output of the green time delay line memory 330 through a second sampling clock. And a green signal interpolation unit 430 for outputting a first green interpolation signal interpolated and outputting a second green interpolation signal interpolated between the second green signal of the current scan line and the first green signal of the subsequent line. A red cyan signal interpolator 400;

The output of the red time delay line memory 310 and the blue time delay line memory 320 and the green time delay line memory 330 in a first field, which is either one of an odd field and an even field. Outputs the red signal interpolator 410, the output of the blue signal interpolator 420, and the blue signal interpolator 430 of the second field. A signal selector 500 for selecting and outputting an output; And

In the first field, the first green signal of the current scan line, the second red signal of the previous scan line, and the second blue signal are synthesized according to the second sampling clock to output a first red-cyan synthesized signal. A second red cyan synthesized signal is sequentially output by combining the second green signal of the first scan signal with the first red signal and the first blue signal of the current scan line, and the second green signal according to the second sampling clock in the second field. The third red cyan composite signal is output by combining the interpolation signal, the first red interpolation signal, and the first blue interpolation signal, and the first green interpolation signal, the second red interpolation signal, and the second blue interpolation signal are output. And a red cyan signal synthesizing unit 600 which sequentially synthesizes and outputs a fourth red cyan synthesized signal.

The operation of the three-plate type high resolution imaging device according to the present invention configured as described above will be described in detail with reference to FIG.

The image sensor unit 100 of the present invention uses a CCD having a normal resolution of a normal resolution or a PAL method in which an additional scan line is set for image stabilization.

The red image sensor unit 100 has the same pixel arrangement as in the embodiment of the pixel arrangement method of the present invention through the red image sensor 110, the blue image sensor 120, and the green image sensor. A signal, the blue signal, and the green signal are captured and output.

화소 피치 만큼 각각 교차시켜 배치함으로써 기수 필드 및 우수 필드에 걸쳐 화소들 간의 균일한 거리를 확보할 수 있다.In this case, the pixel positions of the red image sensor 110 and the blue image sensor 120 are arranged to cross each other by one pixel pitch in the vertical direction corresponding to the pixel positions of the green image sensor 130, and in the horizontal direction.

By intersecting and arranging by pixel pitches, it is possible to ensure a uniform distance between pixels over the odd and even fields.

On the other hand, the three-panel high resolution imaging device according to the present invention allows the adjacent green pixel signals to share the red and blue pixel signals in one of the odd and even fields, and does not exist on the same scan line in another field. In order to form a scan line by linearly interpolating a red and blue pixel signal or a green pixel signal up and down adjacent to each other, a signal processing process as described below is performed. This will be described with reference to.

주사 라인 기간 동안 지연시켜 구동하면, 상기 적색 시간 압축용 라인 메모리(210)는 상기 적색 이미지 센서(110)로부터 단일 주사 라인 기간의 역수인 제 1 샘플링 클럭에 따라 상기 적색 신호를 입력받아 기록하고 라인 배가를 위해 제 1 샘플링 클럭의 두배의 주파수를 갖는 제 2 샘플링 클럭에 따라 주사 라인 단위로 두 번 반복하여 제 1 적색 신호, 제 2 적색 신호 순으로 출력하고, 이와 유사하게, 상기 청색 시간 압축용 라인 메모리(220)도 상기 제 1 샘플링 클럭에 따라 상기 청색 이미지 센서(120)로부터 상기 청색 신호를 입력받아 기록하고 라인 배가를 위해 상기 제 2 샘플링 클럭을 통해 주사 라인 단위로 두 번 반복하여 제 1 청색 신호, 제 2 청색 신호 순으로 출력하며, 상기 녹색 시간 압축용 라인 메로리(230)도 마찬가지로 상기 제 1 샘플링 클럭에 따라 상기 녹색 이미지 센서(130)로부터 상기 녹색 신호를 입력받아 기록하고 라인 배가를 위해 상기 제 2 샘플링 클럭을 통해 주사 라인 단위로 두 번 반복하여 제 1 녹색 신호, 제 2 녹색 신호 순으로 출력하는 데, 이를 도 9의 B에 도시한다. 여기서, Gn 및 R/Bn의 번호 n은 각 필드에 있어 각 주사 라인에 대한 인덱스이고, G, R, B는 각각 녹색 신호, 적색 신호, 청색 신호를 나타낸다.First, the red image sensor 110 and the blue image sensor 120 as shown in A of FIG. 9, with respect to the green image sensor 130.

When driving with a delay for a scan line period, the red time compression line memory 210 receives and records the red signal from the red image sensor 110 according to a first sampling clock which is an inverse of a single scan line period. In order to multiply, the second redundancy signal is repeated twice in the unit of the scanning line according to the second sampling clock having the frequency twice the first sampling clock in order of the first red signal and the second red signal. The line memory 220 also receives and records the blue signal from the blue image sensor 120 according to the first sampling clock, and repeats the scan twice in units of scan lines through the second sampling clock to double the line. The blue signal is output in the order of the second blue signal, and the green memory compression line memory 230 is similarly generated according to the first sampling clock. The green signal is input from the green image sensor 130 and recorded, and the first green signal and the second green signal are sequentially output through the second sampling clock twice in a scan line to double the line. This is shown in B of FIG. 9. Here, the number n of Gn and R / Bn is an index for each scan line in each field, and G, R, and B represent green signals, red signals, and blue signals, respectively.

주사 라인 기간 동안 지연시켜 출력하고, 동시에 상기 청색 시간 지연용 라인 메모리(320)도 상기 제 1 청색 신호 및 상기 제 2 청색 신호를 입력받아

주사 라인 기간 동안 지연시켜 출력하며, 상기 녹색 시간 지연용 라인 메모리(330)도 상기 제 1 녹색 신호 및 상기 제 2 녹색 신호를 입력받아

주사 라인 기간 동안 지연시켜 출력하게 된다.Thereafter, the red time delay line memory 310 receives the first red signal and the second red signal.

Delayed output during the scan line period, and at the same time the blue time delay line memory 320 also receives the first blue signal and the second blue signal

Delayed output during the scan line period, the green time delay line memory 330 also receives the first green signal and the second green signal

Output is delayed for the scan line period.

Meanwhile, the red signal interpolator 410 receives an output of the red time compression line memory 210 and an output of the red time delay line memory 310 according to the second sampling clock. A second red interpolation signal interpolating a second red signal of the current scan line and a first red signal of a subsequent line after outputting a first red interpolation signal interpolating the first red signal and the second red signal of the current scan line At the same time, the blue signal interpolator 420 receives the output of the blue time compression line memory 220 and the blue time delay line memory 320 through the second sampling clock. Outputting a first blue interpolation signal interpolating the first blue signal of the scan line and the second blue signal of the current scan line, and then interpolating the second blue signal of the current scan line and the first blue signal of the subsequent line. Blue boy And the green signal interpolator 430 also outputs the output of the green time compression line memory 230 and the green time delay line memory 330 through the second sampling clock. Outputs a first green interpolation signal interpolated between the first green signal of the current scan line and the second green signal of the current scan line, and then interpolates the second green signal of the current scan line and the first green signal of the subsequent line. A second green interpolation signal is output.

In this case, a linear interpolation method is generally used as a pixel interpolation method used by the red signal interpolator 410, the blue signal interpolator 420, and the green signal interpolator 430. A typical linear interpolation method uses a mean value of pixels. For example, a method of summing pixel values of an interpolation target and dividing them by the number of pixels may be an example.

Another linear interpolation is the simplest form: Zero Order Interpolation (ZOI), which repeats an upper line to a lower line as it is through line memory, also known as the line repetition method. It is simple but has limited applicability as it cannot expect a satisfactory picture quality improvement effect due to interpolation characteristics. In practice, this approach is being applied to liquid crystal device projector systems.

Other interpolation methods include first order interpolation (FOI), a method using a median filter, and a method using a pseudo-median filter.

Thereafter, the signal selector 500 outputs the red time delay line memory 310 and the blue color as shown in FIG. 9C in the first field, which is either one of the odd field and the even field. The output of the time delay line memory 320 and the output of the green time delay line memory 330 are selected and output, and as shown in FIG. 9D in the second field, which is another field, When the output of the red signal interpolator 410 and the output of the blue signal interpolator 420 and the output of the blue signal interpolator 430 are selected and outputted, the red cyan signal synthesizer 600 is shown in FIG. As shown in E, a first red cyan synthesized signal is synthesized by combining a first green signal of a current scan line, a second red signal of a previous scan line, and a second blue signal according to the second sampling clock in the first field. Outputs the second of the current scan line By combining the color signal, the first red signal of the current scan line and the first blue signal, and sequentially outputting the second red cyan composite signal, the scan line is doubled to form a first field, and the first field is formed in the second field. A second red cyan composite signal is output by combining the second green interpolation signal, the first red interpolation signal, and the first blue interpolation signal according to a sampling clock; and the first green interpolation signal and the second red interpolation signal are output. By synthesizing the signal and the second blue interpolation signal and sequentially outputting the fourth red cyan synthesized signal, the scan line is doubled to configure a second field.

In this case, the first field and the second field may be the odd field and the even field, respectively, and may be the even field and the odd field, respectively, but the order of intersection does not affect the overall operation.

As a result, having such components allows adjacent green signals to share red and blue signals in either the radix field or the even field, and the red and blue signals that are not present on the same scan line in another field. As a line can be effectively doubled by linearly interpolating the blue or green signals up and down to form a scanning line, a normal resolution charge coupled device (CCD) or a PAL (Phase) device having an additional scan line is set for image stabilization. It is possible to easily implement a high-definition imaging device compatible with HDTV through a CCD having a conventional resolution of Alternation by Lines).

On the other hand, the present invention has been described on the assumption of interlaced scanning, but since the first field and the second field are combined to form a frame, the present invention can be applied equally to the case of sequential scanning. It is therefore evident that this also belongs to the claims of the present invention.

화소 피치 만큼 교차시켜 배치하고, 기수 필드와 우수 필드 중 어느 하나의 필드에서 적색 및 청색 신호를 인접한 녹색 신호가 공유하게 하고, 또 다른 필드에서는 동일 주사 라인 상에 존재하지 않는 적색 및 청색 신호 또는 녹색 신호를 상하에 인접한 화소를 선형 보간하여 주사 라인을 형성하는 본 발명에 의한 3판식 고해상도 촬상 장치에 따르면, 화소 배치 특성상, 라인 보간시에 화소간의 거리를 균일하게 유지할 수 있으며, 종래의 3판식 색분해 광학계를 변형없이 이용하면서 동시에 추가적인 이미지 센서를 구비하지 않고 통상 해상도의 이미지 센서로 고해상도 HDTV용 촬상 장치를 구현할 수 있음에 따라 제품의 가격적인 용장성을 제거함으로써 HDTV 촬상 장치에 높은 실용성과 경제성을 부여한다.As described above in detail, an imaging device using a three-plate image sensor, comprising: a red image sensor for capturing a red image and generating a red signal; and a green image for capturing a green image and generating a green signal. A green image sensor and a blue image sensor for capturing a blue image to generate a blue signal, wherein the pixel positions of the red image sensor and the blue image sensor correspond to the pixel positions of the green image sensor; Arrange them by a pitch and in the horizontal direction

Intersect by pixel pitch and allow adjacent green signals to share red and blue signals in either the odd or even fields, and red and blue signals or green that do not exist on the same scan line in another field According to the three-plate type high resolution imaging apparatus according to the present invention which forms a scanning line by linearly interpolating a pixel adjacent to an upper and lower signal, the distance between pixels can be kept uniform during line interpolation due to the pixel arrangement characteristic, and the conventional three-plate color separation is possible. By using the optical system without modification and at the same time without the additional image sensor, it is possible to implement a high resolution HDTV imaging device with an image sensor having a normal resolution, thereby providing high practicality and economic efficiency to the HDTV imaging device by eliminating the costly redundancy of the product. do.

Claims (18)

An imaging device using a three-plate image sensor, comprising: a red image sensor for capturing a red image to generate a red signal; A green image sensor which picks up a green image and generates a green signal; And a blue image sensor for capturing a blue image to generate a blue signal, wherein the pixel position of at least one of the red image sensor and the blue image sensor is 1 in a vertical direction corresponding to the pixel position of the green image sensor. A three-plate type high resolution imaging device comprising: an image sensor unit arranged to intersect by a pixel pitch. The image sensor of claim 1, wherein the image sensor unit is disposed by crossing both the red image sensor and the red image sensor by one pixel pitch in a vertical direction corresponding to the pixel position of the green image sensor. The blue image sensor with respect to the green image sensor

A three-plate high resolution imaging apparatus characterized in that the drive is delayed during the scanning line period. 3. The method of claim 2, wherein the image sensor unit receives an output of each image sensor according to a first sampling clock which is an inverse of a single scan line period, writes the output of each image sensor to a line memory for time compression, and adds the first output line to a line doubled. A time compression line memory unit which repeats and outputs each scan line unit twice according to a second sampling clock having a frequency twice the sampling clock; The output of each time compression line memory is input through each time delay line memory according to the second sampling clock.

A time delay line memory unit for delaying and outputting the scan line period; A red cyan signal interpolator for receiving the output of the respective time compression line memory and the output of the respective time delay line memory according to the second sampling clock and interpolating through the respective signal interpolators to output the interpolated signals; The output of the time delay line memory unit is selected and output from the first field, which is one of an odd field and an even field, and the output of the red-green signal interpolation unit is selected from the second field, which is another field. An output signal selector; And a red cyan signal synthesizing unit which receives the output of the signal selection unit in the first field and the second field and sequentially synthesizes the red cyan synthesized signal according to the second sampling clock. Imaging device. The line compression unit of claim 3, wherein the time compression line memory unit receives the red signal from the red image sensor according to the first sampling clock and records the received red signal, and sets the unit to a scanning line unit according to the second sampling clock to double the line. A red time compression line memory which repeats the first red signal and the second red signal in order; The blue signal is received from the blue image sensor according to the first sampling clock, and the blue signal is input and repeated twice in scanning lines through the second sampling clock to double the line, in order of first blue signal and second blue signal. An output blue line compression line memory; And receiving and recording the green signal from the green image sensor according to the first sampling clock, and repeating twice in units of scan lines through the second sampling clock to double the line, in order of first green signal and second green signal. A three-panel high resolution imaging device, characterized in that consisting of a line time memory for green time compression output. 5. The display device of claim 4, wherein the time delay line memory unit receives the first red signal and the second red signal.

A red time delay line memory for delaying and outputting the scan line period; Receiving the first blue signal and the second blue signal

A blue time delay line memory which delays and outputs a scan line period; And receiving the first green signal and the second green signal.

A three-panel high resolution imaging device comprising: a green time delay line memory for delayed output during a scan line period. The red and green signal interpolator of claim 5, wherein the red cyan signal interpolator receives an output of the red time compression line memory and an output of the red time delay line memory according to the second sampling clock. A second red interpolation signal interpolating the second red signal of the current scan line and the first red signal of a subsequent line after outputting a first red interpolation signal interpolating the signal and the second red signal of the current scan line A red signal interpolator for outputting the signal; The output of the blue time compression line memory and the output of the blue time delay line memory are inputted according to the second sampling clock to interpolate the first blue signal of the current scan line and the second blue signal of the current scan line. A blue signal interpolation unit for outputting a first blue interpolation signal and then outputting a second blue interpolation signal obtained by interpolating the second blue signal of the current scan line and the first blue signal of a subsequent line; The output of the green time compression line memory and the output of the green time delay line memory are interpolated according to the second sampling clock to interpolate the first green signal of the current scan line and the second green signal of the current scan line. And a green signal interpolation unit for outputting a first green interpolation signal and then outputting a second green interpolation signal obtained by interpolating the second green signal of the current scan line and the first green signal of a subsequent line. 3-plate high resolution imaging device. 7. The display device of claim 6, wherein the red cyan signal synthesizing unit comprises: the first green signal of the current scan line and the second red signal of the previous scan line and the previous scan line according to the second sampling clock in the first field. After synthesizing the second blue signal and outputting the first red cyan composite signal, the second green signal of the current scan line, the first red signal of the current scan line, and the first blue signal of the current scan line are synthesized. A red cyan composite signal is sequentially output, and a third red cyan composite is synthesized by synthesizing the second green interpolation signal, the first red interpolation signal, and the first blue interpolation signal according to the second sampling clock in the second field. Outputting a signal and sequentially outputting a fourth red cyan composite signal by combining the first green interpolation signal, the second red interpolation signal, and the second blue interpolation signal; Triple high-resolution imaging device according to Jing. The apparatus of claim 3, wherein the red cyan signal interpolation unit adopts a linear interpolation technique using an average value of interpolation target pixels. The image sensor of claim 1, wherein the image sensor is a CCD having a normal resolution of a Charge Coupled Device (CCD) or a Phase Alternation by Lines (PAL) method having an additional scanning line set for image stabilization. Plate type high resolution imaging device. An imaging device using a three-plate image sensor, comprising: a red image sensor for capturing a red image to generate a red signal; A green image sensor which picks up a green image and generates a green signal; And a blue image sensor for capturing a blue image to generate a blue signal, wherein the pixel position of at least one of the red image sensor and the blue image sensor is 1 in a vertical direction corresponding to the pixel position of the green image sensor. Arrange and intersect pixel pitch, in horizontal direction

A three-plate type high resolution imaging device comprising: an image sensor unit arranged to intersect by a pixel pitch. The red image sensor of claim 10, wherein the image sensor unit is disposed by crossing both the red image sensor and the red image sensor by one pixel pitch in a vertical direction corresponding to the pixel position of the green image sensor. The blue image sensor with respect to the green image sensor

A three-plate high resolution imaging apparatus characterized in that the drive is delayed during the scanning line period. 12. The method of claim 11, wherein the image sensor unit receives the output of each image sensor according to a first sampling clock which is an inverse of a single scan line period, and writes the output of each image sensor into a line memory for time compression, and the first line for line doubling. A time compression line memory unit which repeats and outputs each scan line unit twice according to a second sampling clock having a frequency twice the sampling clock; The output of each time compression line memory is input through each time delay line memory according to the second sampling clock.

A time delay line memory unit for delaying and outputting the scan line period; A red cyan signal interpolator for receiving the output of the respective time compression line memory and the output of the respective time delay line memory according to the second sampling clock and interpolating through the respective signal interpolators to output the interpolated signals; The output of the time delay line memory unit is selected and output from the first field, which is one of an odd field and an even field, and the output of the red-green signal interpolation unit is selected from the second field, which is another field. An output signal selector; And a red cyan signal synthesizing unit which receives the output of the signal selection unit in the first field and the second field and sequentially synthesizes the red cyan synthesized signal according to the second sampling clock. Imaging device. The line compression unit of claim 12, wherein the time compression line memory unit receives the red signal from the red image sensor according to the first sampling clock, records the red signal, and sets the unit to a scanning line unit according to the second sampling clock to double the line. A red time compression line memory which repeats the first red signal and the second red signal in order; The blue signal is received from the blue image sensor according to the first sampling clock, and the blue signal is input and repeated twice in scanning lines through the second sampling clock to double the line, in order of first blue signal and second blue signal. An output blue line compression line memory; And receiving and recording the green signal from the green image sensor according to the first sampling clock, and repeating twice in units of scan lines through the second sampling clock to double the line, in order of first green signal and second green signal. A three-panel high resolution imaging device, characterized in that consisting of a line time memory for green time compression output. The apparatus of claim 13, wherein the time delay line memory unit receives the first red signal and the second red signal.

A red time delay line memory for delaying and outputting the scan line period; Receiving the first blue signal and the second blue signal

A blue time delay line memory which delays and outputs a scan line period; And receiving the first green signal and the second green signal.

A three-panel high resolution imaging device comprising: a green time delay line memory for delayed output during a scan line period. The red and green signal interpolator of claim 14, wherein the red cyan signal interpolator receives an output of the red time compression line memory and an output of the red time delay line memory according to the second sampling clock. A second red interpolation signal interpolating the second red signal of the current scan line and the first red signal of a subsequent line after outputting a first red interpolation signal interpolating the signal and the second red signal of the current scan line A red signal interpolator for outputting the signal; The output of the blue time compression line memory and the output of the blue time delay line memory are inputted according to the second sampling clock to interpolate the first blue signal of the current scan line and the second blue signal of the current scan line. A blue signal interpolation unit for outputting a first blue interpolation signal and then outputting a second blue interpolation signal obtained by interpolating the second blue signal of the current scan line and the first blue signal of a subsequent line; The output of the green time compression line memory and the output of the green time delay line memory are interpolated according to the second sampling clock to interpolate the first green signal of the current scan line and the second green signal of the current scan line. And a green signal interpolation unit for outputting a first green interpolation signal and then outputting a second green interpolation signal obtained by interpolating the second green signal of the current scan line and the first green signal of a subsequent line. 3-plate high resolution imaging device. 13. The display apparatus of claim 12, wherein the red cyan signal synthesizing unit comprises: the first green signal of the current scan line and the second red signal of the previous scan line and the previous scan line according to the second sampling clock in the first field. After synthesizing the second blue signal and outputting the first red cyan composite signal, the second green signal of the current scan line, the first red signal of the current scan line, and the first blue signal of the current scan line are synthesized. A red cyan synthesized signal is sequentially output, and the second green cyan synthesized signal is synthesized by synthesizing the second green interpolation signal, the first red interpolation signal, and the first blue interpolation signal according to the second sampling clock in the second field. Outputting a signal and sequentially outputting a fourth red cyan composite signal by combining the first green interpolation signal, the second red interpolation signal, and the second blue interpolation signal; Triple high-resolution imaging device according to Jing. The tri-plate high resolution imaging apparatus of claim 12, wherein the red cyan signal interpolation unit employs a linear interpolation technique using an average value of interpolation target pixels. 12. The image sensor of claim 10, wherein the image sensor is a CCD having a normal resolution of a Charge Coupled Device (CCD) or a Phase Alternation by Lines (PAL) system of which an additional scanning line is set for image stabilization. Plate type high resolution imaging device.

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