JPH05265422A - Display gradation controller - Google Patents

Abstract

PURPOSE:To improve the operability by instantaneously converting the display brightness of display data into display brightness on a display screen according to a window width value and a window center value which are inputted corresponding to physical operation, and then instantaneously inputting the window width value and window center value. CONSTITUTION:The window width value and window center value which are inputted through the physical operation of a display gradation input device 1 are outputted to encoders 2 and 3. The encoders 2 and 3 detects the quantities of variations in the inputted window width value and window center value respectively and outputs the detected quantities of variations to a look-up table generating circuit 4. The look-up table generating circuit 4 generates a look-up table 6 according to the inputted quantities of variations in the window width value and window center value. The look-up table 6 converts the gradations of image data read out of a display image memory 5 into the display brightness of a display device 8 according to the varied window width value and window center value and displays the converted data on the display device 8 through a display signal output device 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display gradation control device, and more particularly, to inputting a window width value and a window center value in a display device for controlling and displaying a gray level of display brightness.

[0002]

2. Description of the Related Art Conventionally, in this type of display device, the gray level of display brightness is controlled according to the input window width value and window center value.
For example, when a diseased part is judged by an X-ray photograph or the like, the gray level of the display brightness may be controlled when the X-ray picture or the like is displayed on the display screen to make it easier to judge the diseased part. ..

In this case, the window width value and the window center value must be changed, but the window width value and the window center value are input by selecting a command with a keyboard or a mouse. Done in.

Here, the window width value is a value of 1024 gray scales when the display luminance indicating the shading of the display data is converted into the display luminance on the display screen, for example, when the data of 1024 gray scales is converted into 256 gray scales. It is a conversion range value indicating which range is to be converted. The window center value is 1024 when converting 1024 gradation data to 256 gradations in the above conversion range.
It is a conversion center value that indicates where the gradation is to be converted, that is, where the 1024 gradation is the center of the conversion range.

In such a conventional display device, since the window width value and the window center value are input by software, there is a problem that the window width value and the window center value cannot be input instantaneously. Also,
When a mouse or the like is used to input the window width value and the window center value, there is also a problem that a space for performing the input process must be secured.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned problems of the conventional ones, and the window width value and the window center value can be input instantaneously, and the operability can be improved. It is an object of the present invention to provide a display gradation control device that can perform such a display.

[0007]

A display gradation control device according to the present invention is a window width value indicating a conversion range in the display brightness of the display data when the display brightness indicating the shading of the display data is converted into the display brightness on the display screen. And a window center value indicating the center of conversion in the display brightness of the display data at the time of conversion into display brightness on the display screen, the display gradation of a display device for displaying the display data on the display screen. A first input means for inputting the window width value according to a physical operation; a second input means for inputting the window center value according to the physical operation; And the display brightness of the display data is converted into the display brightness on the display screen according to the window width value and the window center value respectively input from the second input means. Characterized by providing a switch means.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, the window width value and the window center value input by the physical operation such as the turning operation and the pressing operation in the display gradation input device 1 are output to the encoders 2 and 3, respectively.

The encoders 2 and 3 detect the amount of change in each of the window width value and the window center value input from the display gradation input device 1, and output the detected amount of change to the look-up table creating circuit 4. The lookup table creation circuit 4 creates the lookup table 6 based on the change amount of the window width value input from the encoder 2 and the change amount of the window center value input from the encoder 3.

In the look-up table 6, the gradation of the image data read from the display image memory 5 is converted into the display brightness of the display device 8 based on the changed window width value and window center value, and the converted data is displayed. Is output to the display signal output device 7. The display signal output device 7 generates a display signal based on the data converted by the look-up table 6, and outputs the display signal to the display device 8 for display.

FIG. 2 is a diagram showing an example of the display gradation input device 1 of FIG. 2A is a plan view of the display gradation input device 1, and FIG. 2B is a side view of the display gradation input device 1. In these figures, the display gradation input device 1 has a circular window width value adjusting knob 11 and a circular window width value adjusting knob 11 having a diameter smaller than the diameter of the window width value adjusting knob 11. A window center value adjusting knob 12 is provided.

When changing the window width value while the image data is displayed on the display device 8 with the window width value and the window center value being the initial setting values, the window width value adjusting knob 11 is rotated to rotate the window. Change the width value. In this case, the amount of change in the window width value due to the rotation of the window width value adjusting knob 11 is detected by the encoder 2, and the detected amount of change is output to the lookup table creation circuit 4.

Since the change amount of the window width value is input from the encoder 2 and the change amount of the window center value is not input from the encoder 3 to the look-up table creating circuit 4, the window with the changed window width value and the initial setting value is kept. The lookup table 6 is created based on the center value.

Therefore, the gradation of the image data read from the display image memory 5 is converted in the look-up table 6 according to the changed window width value and the window center value which is the initial setting value, and the display device 8 is converted. Displayed in. At this time, the control process of the display brightness of the image data is instantaneously performed.

When the window center value is changed with the window width value changed, the window center value adjusting knob 12 is rotated to change the window center value. In this case, the change amount of the window center value due to the rotation of the window center value adjusting knob 12 is detected by the encoder 3, and the detected change amount is output to the look-up table creation circuit 4.

Since the look-up table creating circuit 4 does not receive the change amount of the window width value from the encoder 2 and the change amount of the window center value from the encoder 3, it does not change the window width value. And the lookup table 6 is created based on the window center value changed this time.

Therefore, the gradation of the image data read from the display image memory 5 is converted by the look-up table 6 according to the window width value which has been changed by the above-mentioned processing and the window center value which has been changed this time. It is displayed on the display device 8. At this time, the control process of the display brightness of the image data is instantaneously performed.

Further, when either one of the window width value adjusting knob 11 and the window center value adjusting knob 12 is rotated, the set value of the other knob, which has not been rotated, remains fixed and is rotated. The display brightness control process is instantaneously performed in a state in which only the set value of the one knob that has been changed is changed, and the processed image is displayed on the display device 8.

That is, the window width value adjusting knob 11
The adjustment of the window width value by and the adjustment of the window center value by the window center value adjustment knob 12 are independently set without affecting each other. Also,
The window width value adjustment knob 11 and the window center value adjustment knob 12 each have a continuous change amount when rotated, and continuous values are input.

FIG. 3 is a diagram showing another example of the display gradation input device 1 of FIG. In the figure, in the display gradation input device 1, a circular window width value adjusting knob 13 and a circular window center having a diameter smaller than the diameter of the window width value adjusting knob 13 are arranged on the window width value adjusting knob 13. A value adjusting knob 12 is provided.

The window width value adjusting knob 13 is adapted to input the window width value stepwise. That is, when the window width value adjusting knob 13 is rotated to the left, the window width value changes in +10 units, and when the window width value adjusting knob 13 is rotated to the right, the window width value changes in -10 units. On the other hand, when the window center value adjusting knob 12 is rotated, the window center value continuously changes.

Display brightness control processing is instantaneously performed with respect to changes in the window width value and the window center value, and the processed image is displayed on the display device 8.
The adjustment of the window width value by the window width value adjusting knob 13 and the adjustment of the window center value by the window central value adjusting knob 12 are set independently without affecting each other.

As described above, the encoders 2 and 3 detect the amount of change in the window width value and the window center value due to the rotation of the window width value adjustment knobs 11 and 13 and the window center value adjustment knob 12 of the display gradation input device 1. Then, the display brightness of the image data from the display image memory 5 is converted into the display brightness of the display device 8 by the look-up table 6 created by the look-up table creation circuit 4 in accordance with the detection result. The window center value and the window center value can be input by hardware, and the window width value and the window center value can be input instantaneously. Also, the window width value adjusting knob 11 for inputting the window width value and the window center value,
Since the window center value adjusting knob 13 and the window center value adjusting knob 12 are provided above and below, a space for using a mouse or the like is not required as in the conventional case, and the operability can be improved.

In the embodiment of the present invention, the window width value and the window center value are input in accordance with the rotating operation of the window width value adjusting knobs 11 and 13 and the window center value adjusting knob 12. This may be input according to the pressing operation of a plurality of switches, etc. provided corresponding to different window width values and window center values, or in accordance with the horizontal or vertical movement operation of the slider or the like. However, the present invention is not limited to these.

[0026]

As described above, according to the present invention, the window width value indicating the conversion range in the display brightness of the display data when the display brightness indicating the shading of the display data is converted into the display brightness on the display screen. And the window center value indicating the center of conversion in the display brightness of the display data when converting to the display brightness on the display screen are input according to the physical operation, and the window input according to the physical operation is input. By converting the display brightness of the display data into the display brightness on the display screen according to the width value and the window center value, the window width value and the window center value can be input instantaneously, and the operability is improved. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing an example of the display gradation input device of FIG.

FIG. 3 is a diagram showing another example of the display gradation input device of FIG.

[Explanation of symbols]

 1 Display Gradation Input Device 2, 3 Encoder 4 Lookup Table Creation Circuit 5 Display Memory 6 Lookup Table 8 Display Device 11, 13 Window Width Value Knob 12 Window Center Value Knob

Claims (3)

[Claims] 1. A window width value indicating a conversion range of the display brightness of the display data when the display brightness indicating the shade of the display data is converted into the display brightness on the display screen, and the display brightness on the display screen. A display grayscale control device for displaying the display data on the display screen by designating a window center value indicating the center of conversion in the display brightness of the display data when converting the display data into a physical operation. First input means for inputting the window width value according to
Second input means for inputting the window center value in accordance with the physical operation, and the display data of the display data according to the window width value and the window center value respectively input from the first and second input means. A display gradation control device, comprising: a conversion unit that converts display brightness into display brightness on the display screen. 2. The display gradation control device according to claim 1, wherein the physical operation in the first and second input means is a rotating operation. 3. The display gradation control device according to claim 1, wherein the physical operation in the first and second input means is a pressing operation.