JPH0744705A - Color display device for video picture - Google Patents

Abstract

PURPOSE:To easily execute color display which precisely corresponds to the content of a video picture without giving a burden on a host device-side by adjusting the luminance of a luminance signal and converting a luminance change into a color change. CONSTITUTION:Analog monochromatic picture data AD inputted from a video camera 56 is converted into digital data by an A/D converter 62. A luminance signal conversion part 76 executes a prescribed conversion processing for an input signal by using a conversion table 72, and it converts the input signal into a signal where only a required luminance range is emphasized. A color conversion part 96 executes a prescribed conversion processing as against the input signal by using a conversion table 92, and one color is allocated in accordance with respective luminance of the input/signal. A hue and luminance information are set to be a pair and they are outputted. Analog picture data AD stored in a memory 66 is overlap-processed with digital picture data DD stored in a memory 68 in a picture synthesis part 70 and they are displayed in a display 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for displaying a video image output from a video camera or the like in color, and more particularly to an apparatus capable of image processing corresponding to a change in luminance of the video image.

[0002]

2. Description of the Related Art Conventionally, a display device for displaying a video image is generally a display device that directly displays the input display information. If the video image is composed of only monochrome information, the host device adds color information corresponding to the luminance signal and sends it as color information to the display device to display the monochrome image in pseudo color. The method is also known.

[0003]

However, in the color display method described above, since the host device side performs all signal processing for colorization, the host device is overloaded and the processing speed is practically reduced. There was a problem and there was the inconvenience that fine-grained data processing could not be performed.

As a result of consideration made by the inventor in view of such inconvenience, the present inventor has carried out data processing for colorization on an output signal from a luminance adjusting circuit on the display device side, thereby performing colorization display of a video image. It was discovered that

The present invention has been made on the basis of the above-mentioned findings, and it is possible to easily carry out color display accurately corresponding to the contents of a video image without imposing a data processing burden on the host device side. An object is to provide a display device.

[0006]

In order to achieve the above-mentioned object, the color display device according to the present invention has the structure shown in FIG.
A signal extraction means 3 for extracting a luminance signal 2 from an input image signal 1 as schematically shown in FIG.
The magnitude of the luminance signal 2 extracted from the signal extraction means 3 is automatically converted according to a preset correspondence relationship to output an adjustment signal 4, and the correspondence adjustment means 5 is also capable of manually changing the setting. And its signal adjusting means 5
For each magnitude of the adjustment signal 4 extracted from the output, a conversion signal 6 for automatically setting a display color according to a preset correspondence relationship is output, and the correspondence relationship can be manually set and changed. The display means 8 enables color display corresponding to the converted signal 6 output from the signal converting means 7.

As shown in FIG. 7, the signal adjusting means 5 described above has a predetermined gradation range D centered on a predetermined gradation position c of the input luminance signal 2 with respect to the total output gradation range B. In addition to linearly allocating, the gradation of the range F exceeding the set gradation range D is allocated to the maximum gradation a, and the gradation E below is set to the minimum gradation b. It is preferable that the width D of the adjustment range can be changed individually.

[0008]

In the image signal 1 sent from the video image output means such as a video camera, only the luminance signal 2 is selectively taken out by the signal extracting means 3 and then inputted to the signal adjusting means 5. In the signal adjusting means 5, for example, the conversion table 72 set in advance is used to adjust the contrast and the brightness by emphasizing a specific brightness range or the like, thereby extracting the adjustment signal 4 and converting the signal. Input to the means 7.

Further, the signal conversion means 7 converts the luminance change of the adjustment signal 4 into a color change by using, for example, the conversion table 92, so that the display means 8 changes the luminance change of the image signal 1. A corresponding change in color is displayed.

[0010]

As described above, according to the present invention, the luminance signal 2 is extracted from the image signal 1, the luminance of the signal 2 is adjusted, and then the luminance change is converted into the color change. Content can be displayed accurately as a change in color.

[0011]

EXAMPLES The present invention will now be described with reference to FIGS. 2 and 3.
A video camera for monochrome images arranged near the target system 13 on the digital display screen corresponding to the state data handled by connecting the PLC 12 specially configured for sequence control of the target system 13. An example in which an analog video image sent from 56 is superimposed and displayed and data processed, and the result of this data processing is sent to the PLC 12 to control the target system 13 by an example. Although shown, the present invention is not limited to this, and it is needless to say that the present invention can be substantially similarly applied to various types of color display devices such as those specially formed for displaying analog video images.

The display control device 10 embodying the present invention has a P
The LC 12 and the LC 12 are integrally incorporated in an operation console of the target system 13 or independently provided and used as various data creation, operation, and display panels for the target system 13.

In the PLC 12, a circuit is unitized for each required individual function, and each unit is connected in parallel via a bus line as needed so that functions can be achieved as a whole PLC by connecting in parallel. The configuration is substantially the same as that of the conventional one that allows increase and decrease (for example, product number “C2000H” manufactured by OMRON Corporation).

[0014]

[Structure of Display Control Device] The display control device 10 embodying the present invention includes various kinds of color liquid crystal display or CRT display capable of displaying color liquid crystal or CRT so as to close an opening 16 provided at a central position on the front of the body case 14. While the display 18 selected from the display means is arranged, the display 1
A socket 24 to which the plug 22 of the keyboard 20 is detachably attached and a reader / writer socket 28 for inputting / outputting data to / from the IC card 26 are arranged at a lower position of 8.

The display control circuit 3 is provided inside the main body case 14.
While storing 0, the display screen 32 of the display 18 is covered with a transparent touch panel 34 in a close contact state. An input position of the instruction by pressing the touch panel 34 is captured and analyzed via the touch panel controller 36, and during operation of the entire system with the keyboard 20 removed, instruction data can be input by a manual operation.

The basic structure of the display control circuit 30 is substantially the same as that of a general personal computer, and various memories 50 and 82 including a CPU 40, a ROM 42, a RAM 44, and the like will be described later via a bus line 38. The image processing unit 46 described above is connected, and the CPU 40 performs a predetermined arithmetic operation in accordance with the system program stored in the ROM 42, while enabling data input from the keyboard 20 via the I / O controller 48 and R
Various calculation results that are appropriately stored in the AM 44 are digital system image data D using the graphic data GD stored in advance in the graphic memory 50 set in the internal flash memory via the IC card 26.
After being converted into D, it is sent to the video processing unit 46 and displayed on the display screen 32 of the display 18.

Further, on the RAM 44, as shown in FIG.
An area for storing the state data MD stored in the memory unit of the PLC 12 is provided, and the PLC 1 is operated via the communication controller 52 that operates with an algorithm specialized for the circuit configuration of the PLC 12 or a general-purpose communication program.
By allowing data to be exchanged between the computer link unit on the second side and the serial or parallel communication path 54, the PLC 12 and the display control device 10 hold the same state data MD with a minimum time delay. There is.

As shown in FIG. 4, the video processing section 46 synthesizes the digital image data DD formed as described above and the analog image data AD captured by using the video camera 56 with each other, This is made possible by superimposing it on one display screen 32, and by opening a window 84 on the digital image 80 and displaying an analog image 86 in the window 84 as shown in FIG. While confirming the control state of the PLC 12 displayed as a value, the video image under control can be visually confirmed.

That is, a plurality of units (three units in this embodiment) arranged at appropriate places such as in the vicinity of the target system 13 are provided.
Analog monochromatic image data AD sent from a single video camera 56 is input to the image selection unit 58, and analog image data AD from any one device is selectively selected by the selection data SS sent from the video control unit 60. Taken out. The extracted analog image data AD is A
After being sequentially converted into digital data by the / D converter 62, an image adjusting unit 64 and an image converting unit 91 which will be described later are provided.
Through the analog image frame memory 66 in real time.

The video control unit 60 itself has a microprocessor and a memory and is capable of performing image data processing in parallel independently of the CPU 40 based on various data sent from the CPU 40. Therefore, the analog image data AD stored in the analog image frame memory 66 and the digital image frame memory 6
The digital image data DD stored in 8 is sent to the image synthesizing unit 70 at the same time. In the image synthesizing unit 70, the image synthesizing data SD relating to the synthesizing condition sent from the video control unit 60.
After the digital image data DD and the analog image data AD are superposed on the basis of, the display based on this output signal is performed on the display screen 32 of the display 18.

The present invention is characterized by the configuration of the image adjusting unit 64 and the image converting unit 91 that can manually adjust and change the display state of the analog image 86 superimposed on the digital image 80.

That is, the image adjustment unit 64 stores the conversion table 72 of the luminance signal digitally converted by the A / D converter 62, the selection unit 74 of the conversion table 72, and the selected conversion table 72. And a luminance signal conversion unit 76 that performs a predetermined conversion process on the input signal and sends the input signal to the image conversion unit 91.

The luminance signal conversion section 76 has an 8-bit data input / output line and is capable of displaying an input luminance signal of 256 steps of gradation in which the highlight level and the black level are even, in a required luminance range. Only the emphasized signal can be changed.

Here, the luminance signal conversion table 72 is
By converting the luminance signal input to the luminance signal changing unit 76 according to the relationship shown in FIG. 7, the luminance and contrast of the input analog image data AD can be changed and adjusted in 16 steps.

For example, when the contrast adjustment value is "0", conversion is performed so as to change linearly in proportion to the gradation change of the input luminance signal, as shown by the alternate long and short dash line in FIG. 7A.
That is, the input gradation is output as it is. Further, when the adjustment value reaches the maximum value of “15”, as shown by the solid line, 128 gradations centering on the set gradation c, which corresponds to one half of the entire gradation range A of the input signal, It is allocated in proportion to 256 gradations of the entire gradation range B on the display screen 32.

On the other hand, input analog image data A
In the adjustment of the brightness of D, as shown by the one-dot chain line in FIG. 7B, when the set value is in the center of the adjustable range, the set gradation c is the whole gradation range A in the input brightness signal. It is set so that it is located at the center, and every time the adjustment value is increased or decreased by 1, the set gradation c in the input luminance signal is changed as shown by the solid line.
Increase or decrease the position of by the set value.

256 conversion tables 72 are formed corresponding to the combinations of the 16-step changes in the contrast and the brightness. Therefore, the adjustment values of the contrast and the brightness, which are sent manually or automatically based on preset conditions, are set in the table selection unit 7.
4 is selected, the conversion table 72 corresponding thereto is selected. Therefore, the brightness signal conversion unit 76 sequentially converts the gradation of the input brightness signal according to the conversion table 72, and then the next image is processed. Send to the conversion unit 91.

The image conversion unit 91 includes the image adjustment unit 6 described above.
One of the colors that can be displayed on the display 18 is assigned in correspondence with each of the 256 gradations output from No. 4, and the hue and brightness information are output as one set. The conversion table 92 corresponding to the combination of the conversion table 92 is provided, and one of the conversion tables 92 can be selectively selected by the table selection unit 94. Further, in the color conversion unit 96, the conversion table 92 selected
After performing a predetermined conversion process on the input signal using, the converted signal is used as a frame memory 6 for analog images.
Send to 6.

For example, when the hue adjustment value is "0",
A monochrome image having the brightness and the contrast adjusted by the brightness signal conversion unit 76 is displayed on the display 1 by allowing the output of a single color and the same brightness as the input value.
8 is displayed as it is. Further, the conversion table 92 selected each time the adjustment value increases by “1” is replaced, and a color image colored corresponding to the brightness of the input image signal is displayed on the display 18.

[0030]

[Structure of processing instruction word] Display control device 1 for implementing the present invention
In the case of 0, further, the base screen 78 such as the table and the graph frame shown in FIG. 5 whose display contents do not need to be changed, or the image data such as a figure blinking or changing colors on the base screen 78 is required. One file number is designated for each display unit to be stored in the graphic memory 50 in advance.

On the other hand, the status data MD indicated by the bit device corresponding to the ON / OFF state of the relay set on the memory unit on the PLC 12 side or the word device corresponding to the temperature change state is displayed on the display controller 10 side at an appropriate time. The data is read in the RAM 44 in association with each other.

Here, the process data W illustrated in FIG. 7A is stored in advance in the event data memory 82 in the number corresponding to the number of events to be executed on each base screen 78. The processing instruction word W is the file number F of the base screen 78 on which the display control operation should be executed, and the base screen 78.
An event name N specifying the operation content to be executed above and reference information r consisting of one or a plurality of data referred to for each execution event are provided as a set. In addition, the necessary information r such as the address of the state data MD to be referred to or the display coordinates on the display screen 32 of the display 18 can be set in advance.

Therefore, as shown in FIG. 5, the processing instruction words W1, W2, ... Stored in the event data memory 82.
Wn is read intermittently at every minute time, and each processing instruction word W
By executing the operation having the content specified by the event name while referring to the state data MD extracted from the PLC 12 side and the graphic data GD on the graphic memory 50 with the reference information r in the processing instruction word W, the PLC 1
Digital image data DD that changes in response to changes in the contents of the bit device or word device on the second side is created, and the video processing unit 46 displays the digital system image 80 corresponding to the control state of the PLC 12 on the display screen 32. It is done in.

On the other hand, the processing instruction word WT shown in FIG.
R is linked with the pressing operation on the touch panel 34.
Predetermined data can be written to a predetermined address in the AM 44, and is used when manually inputting data in the state where the keyboard 20 is removed. That is, the file number F1 of the base screen 78, the event name N1 starting with "T" for specifying the operation of the touch panel 34, the input coordinate range (X1, X2) on the touch panel 34 that enables the input operation from the touch panel 34, The address A1 at which the data should be written in conjunction with the pressing operation of the touch panel 34, and the touch panel 3 is the data writing.
4 is composed of an operation mode M1 that specifies whether to write a momentary bit limited to a pressing time of 4 or a word write that overwrites an absolute value, and word data or bit position information D1 to be written in an address.

Therefore, if the above processing instruction word WT is set on the display screen 32 in advance, the touch panel 34
The processing instruction word WT having the input coordinate range including it is retrieved from the actual pressed coordinates for, and the data D1 is written to the designated address A1 according to the operation mode M1 set therein.

Further, the processing instruction word WV shown in FIG.
A window 84 is opened as shown in FIG. 6 on the digital image 80 formed by using the normal processing instruction words W1, W2 ... Wn, and the analog image 86 captured from the video camera 56 is displayed in the window 84. It is for.

As a data item set for such a processing instruction word WV, a base screen 78 on which a superimposed display is made.
Of the analog image 86, in addition to the file number F1, the event name N2 that specifies the processing of the video image, for example, the event name N2 that starts with "V", and the ID number N3 that specifies the set processing instruction word WV. From the display attribute M2 and the transparent color M3, the input channel CH of the video camera 56 that specifies the analog image 86 to be displayed, the processing instruction word WT for the touch panel 34 that is hidden under the window 84 when the window 84 is opened. Various image synthesis data SD necessary for synthesizing the analog image data 86 and the digital image data DD, such as the selection data M4 for validating or invalidating the data input of No. 4 or the window setting data are included. Be done.

[0038]

[Image Superimposing Procedure Using Processing Instruction Words] In this embodiment, the processing instruction words WV for video display described above are not directly decoded, but as illustrated in FIGS. 6 and 9. A data storage area 88 for video control is set in advance in the state data MD stored in the RAM 44, and when an ID number is designated therein, the image synthesis data SD of the processing instruction word WV having the corresponding ID number. Data storage area 8
Automatically read in 8. After that, the updated image synthesis data SD is sent to the video processing unit 46, and superimposed display is performed according to the image synthesis data SD.

That is, the video control data storage area 88 is provided with an entry area for the ID number and the image composite data SD,
When the above-mentioned processing instruction word WT1 for the touch panel 34 is used or the predetermined ID number data D1 is directly written from inside or outside the system, the image synthesis data SD is obtained from the processing instruction word WV1 having the written ID number N3. Is read for the area of and the value is the image composite data S
It becomes the default value as D.

The storage area 88 is further provided with three sets of video parameter storage areas for defining the brightness, contrast and hue of the video image, four bits each corresponding to three input channels. In such a parameter storage area, a standard value indicating the best video state is set in advance as a default value, and the above-mentioned image synthesis data SD and the video parameter together with the change occurrence time in the image synthesis data SD and the video parameter. Video processing unit 46 corresponding to
Sent to.

Further, the storage area 88 is provided with an operation area for window setting data and video parameters. In the operation area, the default value set as described above can be manually changed.

FIG. 10 is a screen for adjusting the display state of the analog image 86 in which the operation switch 90 is set by using the processing instruction word WT on the touch panel 34, for example. In conjunction with this, by turning on or off a specific bit in the video parameter operation area, the value of the video parameter in the selected channel is counted up or down.

As described above, when the system forcibly rewrites the stored contents of the video control data storage area 88 by using the touch panel 34 or by satisfying a predetermined condition, the rewritten contents are also sequentially. As a result, the hue of the analog video image 86 in the window 84 is stepwise changed and displayed on the display screen 32.

For example, when all the adjustment values of the brightness, contrast and hue are set to "0", the monochrome image output from the video camera 56 is displayed on the display 18 as it is, as shown in FIG. ,
Data processing is performed on a graphic in which only four gray circles whose brightness increases in order from the left are arranged side by side in one row on a dark background, and only the two circles in the center are highlighted to display them in color on the display screen 32. A case will be described as an example.

When the luminance change is measured at the position shown by the alternate long and short dash line on the figure, the luminance value increases from the left as shown in FIG. 11B. Therefore, in the adjustment by the image adjusting unit 64, when the point c in the input brightness is set as the set brightness in FIG. 7 and the brightness adjustment range is D, FIG.
As shown in (c), the luminance change in the range D is expanded and converted to the entire range of the output luminance, while the luminance in the range below that range is the lowest luminance b, and the luminance in the range above is the highest. Of the brightness a.

Then, in the subsequent image conversion section 91, the output luminance between a'and c'is converted to red, and the output luminance between c'and b'is converted to blue, while all other than these ranges are converted to white. By selecting the conversion table 92 that has been set, as shown in FIG. 11D, the second and third conversion tables 92 are selected.
A signal having a predetermined color is output only at a position corresponding to the circle, and a black level signal is output at other positions. This output signal is displayed on the display 18
11 (e) by displaying on the display screen 32 of FIG.
As described above, two circles of red and blue are displayed in color with the white background.

The conversion of the luminance signal in the signal adjusting means 5 is not limited to the conversion shown in FIG. 7, and any conversion pattern corresponding to the characteristics of the video image to be processed can be used. Furthermore, instead of using the conversion table for stepwise adjustment, stepless conversion may be performed.

The method of adjusting the display state of the analog image 86 is not limited to the method of indirectly using the processing instruction word WV as described above, and the result of the switch operation is directly set as the setting data. It may be sent to the processing unit 46. In addition, as a data source of the analog image 86,
Not only the output from the video camera 56, but also a television signal, an output from a VTR, or the like can be used, and a color video image may be used.

Further, in addition to displaying the display data color-converted by the image converter 91 on the display 18, the display coordinate range of the specific color on the display screen 32 is detected,
It is possible to simultaneously perform data processing using it as control data.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a basic configuration of the present invention.

FIG. 2 is a block diagram showing a configuration of a display control circuit.

FIG. 3 is a partially cutaway perspective view showing a schematic configuration of an external shape.

4 is a block diagram showing a detailed configuration of a video processing unit in FIG.

FIG. 5 is a diagram illustrating a display procedure using a processing instruction word on a display screen, showing a state in which a window is closed.

FIG. 6 is a diagram for explaining a display procedure using a processing instruction word on a display screen, showing a procedure for opening a window and superimposing an analog image.

FIG. 7 is an explanatory diagram illustrating an adjustment state in the luminance signal conversion unit, in which (a) is an example of changing contrast,
(B) shows examples of changing the brightness.

FIG. 8 is an explanatory diagram showing a structure of a processing instruction word particularly used in the present invention, in which (a) is a basic structure of the processing instruction word;
(B) is a structure of a processing instruction word for touch panel operation,
(C) shows a structure of a processing instruction word for superimposing an analog image.

9 is an explanatory diagram showing a specific configuration of video control data in FIGS. 5 and 6. FIG.

FIG. 10 is an explanatory diagram showing an example of a video image adjustment screen.

FIG. 11 is a diagram showing an adjustment procedure on the screen,
(A) is a figure displayed in monochrome on the screen, (b) is a graph showing the change in luminance when the center of the figure is searched, (c)
Is a graph that emphasizes part of the brightness change by the image adjustment unit,
(D) shows a graph showing a color-converted state, and (e) shows a graphic color-displayed on the screen after conversion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 image signal 2 brightness signal 3 signal extraction means 4 adjustment signal 5 signal adjustment means 6 conversion signal 7 signal conversion means 8 display means 10 display control device 18 display 32 display screen 46 image processing unit 56 video camera 58 image selection unit 60 image control Reference numeral 64 Image adjustment portion 72 Conversion table 74 Table selection portion 76 Luminance signal signal conversion portion 80 Digital image 84 Window 86 Analog image 91 Image conversion portion 92 Conversion table 94 Table selection portion 96 Color conversion portion

Claims (2)

[Claims] 1. A signal extracting means (3) for extracting a luminance signal (2) from an input image signal (1), and a luminance signal (2) extracted from the signal extracting means (3).
And a signal adjusting means (5) for automatically converting the magnitude of the output according to a preset correspondence relationship to output an adjustment signal (4) and manually changing the setting of the correspondence relationship. Adjustment signal (4)
For each size of, the conversion signal (6) in which the display color is automatically set according to the preset correspondence relationship is output, and
A signal converting means (7) capable of manually changing the corresponding relationship, and a display means (8) capable of color display corresponding to the converted signal (6) output from the signal converting means (7). Color display device for video images with. 2. The above-mentioned signal adjusting means (5) has a predetermined gradation range D centered on a predetermined gradation position c of the input luminance signal (2) and is substantially linear with respect to the entire output gradation range B. In addition, the gradation of the range F exceeding the set gradation range D is allocated to the maximum gradation a, and the gradation E below the gradation range is allocated to the minimum gradation b. 2. The color display device according to claim 1, wherein the width D of the gradation range can be changed individually.