JP4298947B2 - Image display method and television camera apparatus - Google Patents

Description

となる。
【００２３】
【発明の効果】
本発明によれば、ズームアップを行なった場合でも、視野角が狭くなることがなく、観測者が被写体の位置関係を確認し易い、映像信号が得られるテレビジョンカメラを提供することができる。
【図面の簡単な説明】
【図１】 本発明の一実施例のテレビジョンカメラ装置の構成を示すブロック図。
【図２】 本発明の一実施例の映像のイメージを示す図。
【図３】 従来のズームアップ時の画像のイメージを示す図。
【図４】 本発明の第２の実施例の映像のイメージを示す図。
【図５】 本発明の拡大部の表示エリアのサイズ設定の一実施例を説明する図。
【図６】 本発明の拡大したい所望の画像エリア部分の指定の一実施例を説明する図。
【図７】 本発明の拡大する表示エリアと縮小する表示エリアの位置決めする方法についての一実施例を説明するための図。
【図８】 本発明の拡大する表示エリアと縮小する表示エリアの位置決めする方法についての一実施例を説明するための図。
【符号の説明】
1：レンズ、 2：撮像素子、 3：CDS・LPF 回路、4：AGC 回路、 5：信号処理回路、 6：画像メモリ、 7：拡大・縮小処理部、 8：CPU、 10：画像、 11，12，13，14，11′，12′，13′，14′，12″，13″：人物、 20，20′，30，30′：画像、 21，22，22′，22″：領域、 50：全体の表示領域、 51，52：点、 53：領域、 55，55′：中心、 56，56′：拡大表示領域、 100：信号出力部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a television camera apparatus that can output a single video signal without impairing the viewing angle even when zooming in with an electronic zoom function.
[0002]
[Prior art]
Conventionally, when an image captured by a television camera device such as a monitoring camera is remotely observed on a display device such as a monitor, a desired arbitrary area of the image displayed on the display device is enlarged by zooming up. Sometimes. For example, an observer who is observing with a display device installed in a remote place (for example, a security room), who is the person in the image displayed on the display device, and what facial expression There are times when you want to check information such as. At this time, the monitoring person zooms up by remote control by designating the location of the person's face on the control console (for example, a personal computer), the enlargement ratio, and the like.
The television camera device and the display device are connected to the control console via RS-232C or LAN (Local Area Network).
[0003]
FIG. 3 is a diagram illustrating an image of a conventional zoom-up image. (a) is an image 10 that shows the entire surveillance field before zooming up, and (b) is an image 20 that zooms in on the face region 21 of the person 11 in the center of the image 10. is there.
When the enlarged image 20 was copied to the display device, the supervisor wants to know, for example, what the other persons 12 and 13 appear in the image 10 are and what they are doing. There is a case. In addition, there are cases where it is desired to know the relative position of the region 22 of the image 20 with respect to other parts.
[0004]
If you need to see the image 20 magnified by zooming up and the entire wide-angle image 10 at the same time,
(1) Method to output zoomed-in image 20 and wide-angle image 10 as two systems of signals (2) Zoom-in image 20 and wide-angle image 10 are combined into one image and synthesized. Can be realized with a method of outputting
[Problems to be solved by the invention]
The conventional television camera apparatus has the following drawbacks: (1) In the method of outputting two signals of a zoomed-up image and a wide-angle image, two displays are displayed for one camera. Equipment is required and is not efficient.
(2) In the method in which one of the zoomed-up image and the wide-angle image is fitted, the boundary between the two synthesized images is not spatially continuous, so the observer grasps the positional relationship between the two images. Hateful.
An object of the present invention is to provide a television camera device that eliminates the above-described drawbacks and that can obtain a wide-angle image without narrowing the viewing angle even when zooming up.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the television camera apparatus of the present invention photoelectrically converts an image input through a lens, digitizes and processes the photoelectrically converted signal, and further processes the digitized image. It has a function that can arbitrarily change the image size of a signal or a fixed area, and if the desired area is enlarged by zooming up, the surrounding area is reduced and the image size is the same as that before zooming up Thus, even when zooming up is performed, a video signal having the same viewing angle as that when zooming up is not performed can be output.
[0007]
That is, the image display method of the present invention enlarges a desired area of the acquired image and reduces a part or all of the area other than the enlarged desired area, and the enlarged image and the reduced area. The displayed image is displayed on the display screen.
In the image display method of the present invention, the acquired image is specified by designating a center of the desired area, an enlargement ratio, and a size of a display area of the display screen on which the enlarged image is displayed. The desired area is electronically zoomed up and displayed in the display area of the display screen.
Further, the image display method of the present invention specifies a desired area of the acquired image by designating a range of the desired area and a size of a display area of the display screen on which the enlarged image is displayed. Electronic zoom-in is performed and the display area is displayed on the display screen.
In the image display method of the present invention, the desired area of the acquired image is electronically zoomed up and displayed in the display area of the display screen by designating an enlargement ratio and the range of the desired area. To do.
[0008]
In the image display method of the present invention, the position of the display area of the display screen that displays the enlarged image is determined according to the relative position between the center of the desired area and the entire display area. Is.
In the image display method of the present invention, a region other than the desired region is compressed and displayed in the horizontal direction.
In the image display method of the present invention, the region other than the desired region is compressed and displayed in the vertical direction.
In the image display method of the present invention, an area other than the desired area is compressed and displayed in the horizontal direction and the vertical direction.
[0009]
In addition, the television camera device of the present invention includes an image sensor, a signal processing unit that performs image processing on a video signal acquired by the image sensor, an image memory that stores the image processed image data, and the stored image data. A television camera apparatus comprising an enlargement / reduction means for enlarging or reducing a desired area of an image, and a control means for controlling the enlargement / reduction means, wherein the control means is a request for an image acquired by the image sensor. This area is electronically zoomed up, and the other areas are reduced to display the entire acquired image.
[0010]
Further, the image memory of the television camera apparatus of the present invention stores the image processed image data supplied from the signal processing means in a plurality of fields or frames and stores the image data in the enlargement / reduction means. Is output for each screen.
Further, the enlargement / reduction means of the television camera apparatus of the present invention enlarges or reduces the image data for each area.
Further, the enlargement / reduction means of the television camera device of the present invention enlarges the desired area so as to be the same size as the image size of the image data stored in the image memory, and an area other than the desired area The video data reduced in size is output.
The television camera apparatus of the present invention further includes a signal output means, and changes the video data output from the enlargement / reduction means to a VBS or 4: 2: 2 digital signal for output. .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a television camera according to the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing a configuration of a television camera apparatus according to an embodiment of the present invention. 1 is a lens, 2 is an image sensor, 3 is a CDS / LPF circuit, 4 is a gain control (AGC) circuit, 5 is a signal processing circuit, 6 is an image memory, 7 is an enlargement / reduction processing unit, and 8 is a CPU (Central Processing) Unit), 100 is a signal output unit. The image sensor 2 is, for example, a CCD (Charge Coupled Device).
[0012]
In FIG. 1, incident light from a subject passes through a lens 1 and enters an image sensor 2. The image sensor 2 photoelectrically converts incident light into a video signal and outputs it to the CDS / LPF circuit 3. The CDS / LPF circuit 3 reduces thermal noise, 1 / f noise, sampling noise, and the like included in the input video signal, and outputs them to the AGC circuit 4. The AGC circuit 4 gain-amplifies the video signal with reduced noise to a required level and outputs it to the signal processing circuit 5. The signal processing circuit 5 performs A / D conversion on the video signal input from the AGC circuit 4 and digitizes it. Further, the signal processing circuit 5 performs necessary signal processing such as knee correction, detail correction, and gamma correction, and outputs the result to the image memory 6. .
[0013]
The image memory 6 stores the I field or I frame portion of the video signal input from the signal processing unit 5 as image data, and the stored image data for each screen is enlarged / reduced processing unit 7. (I is a natural number). The enlargement / reduction processing unit 7 arbitrarily expands / contracts the input image data for each area, for example, enlarges the center of the image at an arbitrary magnification specified by the CPU 8, and at the same time, the image size is reduced. Only the peripheral part of the image is reduced so as to be the same as before enlargement, and the processed video data is output to the signal output unit 100. The signal output unit 100 converts the input video data into a digital signal such as VBS or 4: 2: 2, and outputs it to another processing system or display device. The display device is, for example, a monitor, a display, and a display panel, and the other processing system is, for example, a personal computer connected to a LAN, a monitor of a monitoring system, a printer, a facsimile, a display panel, and the like.
Further, the CPU 8 controls the AGC circuit 4, the video signal processing unit 5, and the enlargement / reduction processing processing unit 7.
[0014]
FIG. 2 is a diagram showing an image at the time of electronic zoom-up (enlargement) according to an embodiment of the present invention.
FIG. 2 (a) is an image 10 showing the entire surveillance field before electronic zoom-up, and is the same as FIG. 3 (a). FIG. 2 (b) shows an image 20 'displayed by zooming up and enlarging the face region 21 of the person 11 shown in the center of the image 10 and reducing the remaining region. That is, FIG. 2 shows an image 20 'in FIG. 2 (b) in which an area that is not enlarged is compressed and displayed in the horizontal direction. In the image 20' in FIG. The image with ′ is displayed compressed in the horizontal direction. In the vertical direction, the upper and lower areas of the image 10 are not displayed without being compressed so that the feet of the persons 11 'to 13' of the image 20 'are not visible.
[0015]
In the example of FIG. 2, only the horizontal direction is compressed, and the vertical direction is not compressed. However, it is possible to compress the vertical and horizontal directions at the same time, or to compress only in the vertical direction, and the supervisor can freely select them.
FIG. 4 is a diagram showing a second embodiment of the present invention, which is an embodiment in which an area that is not enlarged and displayed is compressed in the vertical direction.
FIG. 4 (a) is an image 30 showing the entire surveillance field before electronic zoom-up. In contrast to the image 10 in FIG. 2 (a), a person 14 is shown below the person 11 in FIG. 4 (a). FIG. 4B is an image 30 ′ obtained by zooming up the face area 21 of the person 11 shown in the center of the image 30.
In the image 30 ′ of FIG. 4 (b), the images 12 ″ and 13 ″ of the person on both sides of the region 22 ″ of the electronic zoom-up image protrude from the display image 30 ′. The person 14 'on the side is displayed compressed vertically.
[0016]
Next, referring to FIGS. 5 to 8, an example in which a desired image area portion is enlarged (electronic zoom-up) will be described.
FIG. 5 is a diagram for explaining an embodiment in which the size of the display area of the enlarged portion is set in the present invention. FIG. 6 is a diagram in the case of specifying a desired image area portion to be enlarged in the present invention. It is a figure explaining one Example.
FIGS. 7 and 8 are diagrams for explaining an embodiment of a method for positioning a display area to be enlarged and a display area to be reduced in the present invention, respectively. 5 to 8, images transmitted from the monitoring camera device are omitted from the display area.
[0017]
First, the monitoring person operates the control console to set the size of the display area for displaying the enlarged portion.
As shown in FIG. 5, for the entire display area 50, for example, the upper right point 52 of the enlarged portion is designated using a lower left corner 51 as a base point using a pointing device such as a mouse. As a result, the area of the rectangular region 53 formed by the point 51 at the lower left corner and the point 52 at the upper right corner is set to the size of the display region of the enlarged portion.
That is, the rectangular area 53 specifies how much of the display area is enlarged relative to the video size (the entire display area 50).
[0018]
Next, the part to be enlarged is designated, and the magnification to be enlarged at the same time is designated.
For example, as shown in FIG. 6, the center 55 of the image area portion to be enlarged in the entire display area 50 is designated, and at the same time, the enlargement ratio is designated. The designation of the enlargement ratio is input with a keyboard or the like, for example.
For example, if the enlargement ratio is specified to be double, the display area size (area of the rectangular area 53) set in FIG. Extract the image area of the range.
[0019]
By specifying any two of the size of the enlarged display region, the size of the image region portion to be enlarged (image region to be extracted), and the enlargement ratio, the other one can be determined.
For example, in FIG. 6, after designating the center 55 ', if the size of the area 56 to be enlarged is designated without entering the enlargement ratio, the enlargement ratio becomes the enlargement ratio = (area 53) / (area of area 56). ). Also, in order to set the vertical and horizontal magnifications individually, the vertical length Y of the region 53, the horizontal length X, the vertical length y of the region 56, and the horizontal length x are It is also possible to obtain the enlargement ratio = Y / y and the horizontal enlargement ratio = X / x.
[0020]
That is,
(1) When the size and magnification of the enlargement portion with respect to the entire display area are determined and the center of the area to be enlarged is designated, the size of the area to be enlarged is determined around the designated point.
(2) When the size of the enlarged portion and the range of the area to be enlarged are specified with respect to the entire display area, the magnification to be enlarged is determined.
(3) When the magnification and the range of the area to be enlarged are designated, the size of the enlarged portion relative to the size of the entire display area is determined.
[0021]
Next, a method of positioning the display area to be enlarged and the display area to be reduced will be described with reference to FIGS.
FIG. 7 shows the case where the center 55 'of the region to be enlarged is deviated from the center of the entire display region 50 displayed on the display device, and the center 55' of the image region designated for electronic zoom-up and the entire region. It is a figure explaining positioning of the expansion area in the horizontal direction and the vertical direction so that the distance from the left and right ends of the display area 50 and the distance from the upper and lower ends are the same.
That is, the position of the enlarged display screen area 56 ′ is determined according to the relative position between the center 55 ′ of the area designated by the electronic zoom and the entire display area 50.
In FIG. 7, the distance xa from the center 55 'to the left edge of the enlarged display area 56', the distance xb to the right edge, the distance yb to the upper edge, the distance ya to the lower edge, and the left edge of the entire display area 50 from the center 55 '. Between the distance XA to the right, the distance XB to the right edge, the distance YB to the upper edge, and the distance YA to the lower edge
XA: XB = xa: xb
YA: YB = ya: yb
Is distributed so that
[0022]
Next, FIG. 8 shows another embodiment of the present invention, and shows a case where all the portions that do not enter the enlarged region at the specified magnification with reference to the center 55 'of the region to be enlarged are reduced and displayed. In FIG. 8, the horizontal and vertical positioning of the enlarged region 56 ′ is performed so that the distance from the left and right ends of the designated center 55 ′ and the display region 50 and the distance from the upper and lower ends are the same. It is a figure explaining what to do.
That is, the vertical distance yL of the enlarged display area 56 ′ from the center 55 ′, the distance y1 from the upper end of the enlarged display area 56 ′ to the upper end of the entire display area 50, and the lower end of the enlarged display area 56 ′ to the entire display area 50. If the distance y0 to the bottom edge of the image and the distance Y from the top edge to the bottom edge of the entire display area 50 are
Reduced area magnification = (y0 + y1) / [(y0 + y1) + {yL × (enlargement area enlargement ratio-1) / enlargement area enlargement ratio}]
It becomes.
For example, if the area ratio of the enlarged display area 56 ′ to the entire display area 50 is 25% (length ratio is 50%),

It becomes.
[0023]
【The invention's effect】
According to the present invention, it is possible to provide a television camera capable of obtaining a video signal that does not narrow a viewing angle and allows an observer to easily confirm the positional relationship of a subject even when zooming up.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a television camera apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram showing an image of an image according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating an image of a conventional zoom-up image.
FIG. 4 is a diagram showing an image of a video according to a second embodiment of the present invention.
FIG. 5 is a diagram for explaining an embodiment of setting the size of the display area of the enlarged portion according to the present invention.
FIG. 6 is a diagram for explaining an embodiment of specifying a desired image area portion to be enlarged according to the present invention.
FIG. 7 is a diagram for explaining an embodiment of a method of positioning a display area to be enlarged and a display area to be reduced according to the present invention.
FIG. 8 is a diagram for explaining an embodiment of a method for positioning a display area to be enlarged and a display area to be reduced according to the present invention.
[Explanation of symbols]
1: Lens, 2: Image sensor, 3: CDS / LPF circuit, 4: AGC circuit, 5: Signal processing circuit, 6: Image memory, 7: Enlargement / reduction processing unit, 8: CPU, 10: Image, 11, 12, 13, 14, 11 ', 12', 13 ', 14', 12 ", 13": person, 20, 20 ', 30, 30': image, 21, 22, 22 ', 22 ": area, 50: Overall display area, 51, 52: Point, 53: Area, 55, 55 ': Center, 56, 56': Enlarged display area, 100: Signal output section.

Claims (2)

The image acquisition and image enlargement / reduction means specify the desired area of the acquired image, the center point of the area to be enlarged, and the enlargement ratio, thereby enlarging the area at the enlargement ratio around the center point, and All the areas other than the enlarged area are reduced without narrowing the viewing angle of the acquired image, and the enlarged image and the reduced image are displayed on a display screen by an image display means. Image display method. Image sensor, signal processing means for image processing of video signal acquired by image sensor, image memory for storing image processed image data, and enlargement for enlarging or reducing a desired area of the stored image A television camera apparatus comprising: a reduction means; a control means for controlling the enlargement / reduction means; and a designation means for designating the desired area, a center point of the area to be enlarged, and an enlargement ratio,
The control means electronically zooms up the designated area around the center point designated by the designation means with respect to the image acquired by the imaging device at the designated magnification, and other than the area designated by the designation means The television camera apparatus is characterized in that the area is reduced without narrowing the viewing angle of the image acquired by the image sensor, and the entire acquired image is displayed by image display means .

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