Display control device, program, and display control method

Abstract

To suppress a reduction in visibility of an image and adjust the brightness of a text window part.SOLUTION: A control unit 20 which is supplied with an image signal from the outside comprises: a display control unit 25 for controlling a display unit 11 to display a screen image upon receiving a supplied image signal; a comparison unit 23 for comparing the peak level of image signal of a text window part displayed on the display unit 11 with the peak level of image signal of an image immediately before the text window part opens; and a luminance control unit 24 for controlling a gain in a direction of reducing the peak level for the whole screen image when the peak level of image signal of the image is larger than the peak level of image signal of the text window part, in accordance with the comparison result of the comparison unit 23.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a display control device, a program, and a display control method. [Background technology]

[0002] Regarding a display device that receives RGB luminance signals and displays a color image on the display unit, There is a known technique for optimally correcting the color temperature of white depending on the area of ​​white (for example, see patent document 2). (See Reference 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-300184 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, when a display device such as a radiology device displays an image with many dark areas, such as a radiology image, In the state shown, you can open a bright window, such as a text window. In this case, the brightness level of the displayed image becomes extremely high, making it difficult to look directly at with the naked eye. The technology shown in Patent Document 1 optimizes the white color temperature for both small and large areas. It is a technology that considers the glare of the user looking directly at the screen, and does not consider the glare of the user looking directly at the screen. If a text window is open, reducing the overall brightness of the display may reduce the visibility of the image. There is a risk of this happening.

[0005] The present invention has been made in view of the above, and is a text window that suppresses a decrease in image visibility and Display control device, program, and display control method capable of adjusting the brightness of the window section - Patents.com The purpose is to provide the following. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems and achieve the object, a display control device according to the present invention includes: a display control device that receives an image signal from an external device and displays the image on a display unit; a display control unit that controls the display of a screen image on the display unit; The peak level of the image signal in the text window and the image signal in the image immediately before the text window is opened are a comparison unit for comparing the peak level of the image signal with the peak level of the image signal; the peak level of the image signal of the text window portion is greater than the peak level of the image signal of the text window portion If the peak level is too high, the gain is adjusted to reduce the peak level of the entire screen image. and a brightness control unit.

[0007] The program according to the present invention receives a supplied image signal and displays a screen image on a display unit. a display control step for controlling the image of the text window portion displayed on the display unit to be displayed as follows: The peak level of the signal and the peak of the image signal of the image just before the text window portion is opened a comparison step of comparing the image level with the image level of the image; The peak level of the image signal is greater than the peak level of the image signal of the text window portion. If the peak level is too high, the gain is adjusted to reduce the peak level of the entire screen image. The brightness control step is performed by a computer operating as a display control device.

[0008] The image interpretation control method according to the present invention includes receiving a supplied image signal and displaying a screen image on a display unit. a display control step for controlling the image of the text window portion displayed on the display unit; The peak level of the image signal and the peak level of the image signal of the image just before the text window portion is opened. a comparison step of comparing the image with a clock level; and the peak level of the image signal of the text window portion is greater than the peak level of the image signal of the text window portion If the peak level is too high, the gain is adjusted to lower the peak level of the entire image. and a brightness control step. [Effects of the Invention]

[0009] According to the present invention, the decrease in image visibility is suppressed and the brightness of the text window portion is adjusted. It is possible. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a display device having a display control device according to the first embodiment. [Figure 2] FIG. 2 is a flowchart showing an example of processing in the display control device according to the first embodiment. [Figure 3] FIG. 3 is a diagram illustrating an example of a display on the display unit. [Figure 4] FIG. 4 is a diagram showing a histogram of the image shown in FIG. [Figure 5] FIG. 5 is a diagram showing the signal level and gain of the image in FIG. [Figure 6] FIG. 6 is a diagram illustrating an example of a display on the display unit. [Figure 7] FIG. 7 is a diagram showing the signal level and gain of the image in FIG. [Figure 8] FIG. 8 is a diagram illustrating an example of a display on the display unit. [Figure 9] FIG. 9 is a diagram showing the signal level and gain of the image in FIG. [Figure 10] FIG. 10 is a diagram showing a histogram of the image shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of a display control device, a program, and a display control method according to the present invention will be described with reference to the drawings. The present invention will be described based on the following embodiments. [First embodiment] (display device) FIG. 1 is a block diagram showing an example of the configuration of a display device 10 having a control unit 20 according to a first embodiment. The display device 10 displays the image and text window image in the text window section. The display device 10 is a device for displaying a screen image including text without changing the brightness of the image. The display device 10 displays, for example, a current image. The display device 10 is a device for interpreting radiological images such as radiographs or mammograms. For example, the display device 10 may be a display device that displays an image such as a natural image. An example will be described in which the image is an image reading device and the image is a read image.

[0012] The text window portion is input via a computer external to the display device 10. The text window section is the image of the text window image output from an external computer. This is a text window displayed on the display device 10 according to the image signal.

[0013] The display device 10 receives an image signal from the outside for displaying a screen image. The device 10 receives an image signal from an external computer connected by wire or wirelessly, for example. The display device 10 performs display based on an image signal input from the outside.

[0014] The text window is a window where text is displayed on a white or almost white background. In this case, it is grayscale, so it becomes achromatic. When displayed in gradation, there are 256 gradations from 0 to 255. The maximum gradation is 255, and all The window in which the pixels are displayed is called a white window. The level is called the level. An almost white background is composed of pixels with a level of less than 255, such as 254. The white level of the text window area is the same as that of the image. The text window part is displayed on the same screen of the display unit 11. The text window is brighter than the image being read. Alternatively, it can be displayed on the display unit 11 in a state where it is partially overlapped with the image to be read.

[0015] The display device 10 includes a display unit 11 and a control unit (display control device) 20.

[0016] The display unit 11 is a device that displays various information. The display unit 11 is, for example, a liquid crystal display. LCD (Liquid Crystal Display) or OLED (EL displays, including electro-luminescence displays The display unit 11 displays a screen image based on an image signal input to the display device 10 from the outside. The display unit 11 displays an image based on an image signal output via the display control unit 25 of the control unit 20. In this embodiment, the display unit 11 displays the image and the text window. The display unit 11 displays the text window without changing the brightness of the image to be read. Display brightness reduced.

[0017] The control unit 20 is, for example, a CPU (Central Processing Unit) The control unit 20 is a processing unit (control device) that is configured with the stored programs. The program is loaded into memory and the instructions contained in the program are executed. The internal memory includes an internal memory (not shown), which is used for temporary storage of data in the control unit 20. The control unit 20 does not change the brightness of the image to be read, but changes the brightness of the text window. The control unit 20 controls the image signal acquisition unit 29, the detection unit 21, and The image processing device includes an analysis unit 22, a comparison unit 23, a brightness control unit 24, and a display control unit 25.

[0018] The image signal acquisition unit 29 acquires the image of the screen image to be displayed on the display unit 11 from outside the display device 10. An image signal is acquired.

[0019] The detection unit 21 detects the text window portion displayed on the display unit 11. The detection unit 21 detects the text window from the image signal of the screen image output to the display unit 11. In this embodiment, the detection unit 21 detects pixels corresponding to the text window portion. As the corresponding pixel, a pixel with a white level of 100% is detected from the image signal of the screen image. As mentioned above, the image does not contain pixels with a 100% white level, so the image does not contain pixels with a 100% white level. The 100% white level pixels are from the text window image in the text window area. For example, when the image signal has 8-bit gradation, the detection unit 21 detects the white level The detection unit 21 detects pixels with a level of 255, which is 100%. The detection unit 21 may also include pixels with a level of less than 255, such as 254. The detection unit 21 may detect, for example, the plurality of pixels detected in this way as a predetermined If the area of ​​the text window is larger than the area of ​​the text window, it is detected as a text window.

[0020] The analysis unit 22 analyzes the peak level of the image displayed on the display unit 11. The analysis unit 22 analyzes the peak level of the image signal of the image output to the display unit 11. For example, the image signal of an image is peaked except for the areas with high black levels and high white levels. The peak level may be analyzed. A known method can be used to analyze the peak level. , but is not limited to.

[0021] The analysis unit 22 extracts peaks from the histogram of the screen image including the text window. When the signal level is calculated, the signal level corresponding to the text window area is displayed on the histogram. This may result in a decrease in the accuracy of peak level detection. It is preferable to perform detection excluding the signal level corresponding to the text window portion.

[0022] The analysis unit 22 also takes into consideration the histogram immediately before the text window is opened. The peak level of the image may be calculated.

[0023] The comparison unit 23 compares the level of the text window portion displayed on the display unit 11 with the level of the text window portion displayed on the display unit 11. In this embodiment, the comparison unit 23 compares the peak level of the image displayed on the display unit The clip level of the text window displayed on the display 11 and the image displayed on the display 11 are More specifically, the comparison unit 23 compares the analysis result of the analysis unit 22 with the peak level of the image. Based on this, the clip level of the text window portion displayed on the display unit 11 is It is determined whether the signal level is above the peak level of the image displayed in 1.

[0024] The text window area is not limited to 100% white, but can be anything other than 100% unclipped white. Includes light grey background text window section level.

[0025] The brightness control unit 24 determines whether the peak level of the image is in the text-width range or not, depending on the comparison result of the comparison unit 23. If the level is higher than the level in the window, the gain is adjusted to lower the peak level across the entire image. In this embodiment, the brightness control unit 24 controls the brightness according to the comparison result of the comparison unit 23. If the peak level of the image is higher than the clip level of the text window, the image The gain is controlled to lower the overall peak level.

[0026] The brightness control unit 24 controls the level of the text window portion in accordance with the comparison result of the comparison unit 23. If the clip level of the text window is higher than the peak level of the image, In this embodiment, the brightness control unit 24 controls the brightness so that the signal is clipped to a level close to the reference level. According to the comparison result of the comparison unit 23, the clip level of the text window part is adjusted to the peak level of the image. If the clip level of the text window is higher than the peak level of the image, Controls the clipping up to

[0027] The predetermined value of the gain is, for example, 1.

[0028] In this embodiment, the brightness control unit 24 controls the clip level of the text window portion to be equal to the clip level of the image. If it is above the peak level, the clip level of the image signal in the text window is reduced. The brightness control section 24 changes the clip level of the image signal other than the text window section. Do not change.

[0029] In this way, the brightness control unit 24 adjusts the brightness of the pixels in the text window area on the display unit 11. Adjust the brightness of the

[0030] The display control unit 25 controls the display unit 11 to display an image and a text window. The display control unit 25 controls the brightness control unit 24 to select a signal that displays the maximum gradation among the image signals. The display is based on the image signal with the clip level of the signal strength reduced. The control unit 25 controls the display to reduce the brightness of the text window while maintaining the brightness of the image. Do the following. (Processing in the display device) Next, the processing in the display device 10 will be described with reference to FIG. 2. 10 is a flowchart showing an example of processing in the control unit 20 according to the embodiment. After the start-up, while the process of displaying a screen image on the display unit 11 is being performed, the flow shown in FIG. -Chart processing is performed.

[0031] The control unit 20 detects the text window portion (step S101). The control unit 20 detects text data from the image signal output to the display unit 11 by the detection unit 21. The control unit 20 detects the pixels corresponding to the window portion by the detection unit 21. As a pixel corresponding to the window portion, a white level of 100 is selected from the screen image displayed on the display unit 11. % of pixels. The control unit 20 detects the plurality of white level 1 pixels detected by the detection unit 21. If 00% of the pixels form an area larger than the specified area, it is detected as a text window. The control unit 20 proceeds to step S102.

[0032] The control unit 20 calculates the peak level of the image (step S102). The control unit 20 analyzes the peak level of the image displayed on the display unit 11 by the analysis unit 22. The control unit 20 analyzes, for example, a portion of the image signal with a high black level by the analysis unit 22. The control unit 20 may analyze the peak level excluding the portion with a high white level. Proceed to step S103.

[0033] The control unit 20 determines whether the clip level of the text window portion is equal to or higher than the peak level of the image. In more detail, the control unit 20 determines whether the comparison unit 23 Therefore, the clip level of the text window portion displayed on the display unit 11 is The control unit 20 determines whether the level of the image displayed on the text is equal to or higher than the peak level of the image displayed on the text display unit 20. When it is determined that the clip level of the window section is equal to or greater than the peak level of the image (step If the answer to step S103 is Yes, the process proceeds to step S104. If it is not determined that the clip level is equal to or higher than the peak level of the image (step S103 If the answer is No, proceed to step S105.

[0034] If the clip level of the text window is judged to be equal to or higher than the peak level of the image, If so (Yes in step S103), the control unit 20 adjusts the brightness (step S104). More specifically, the control unit 20 controls the brightness control unit 24 to generate an image signal with a white level of 100%. The control unit 20 reduces the clip level of the step to near the peak level of the image. Proceed to S106.

[0035] The clip level of the text window is not judged to be equal to or greater than the peak level of the image. If the result of step S103 is No, the control unit 20 applies a gain of 1 or less (step S 105). More specifically, the control unit 20 controls the brightness control unit 24 to set a brightness of 1 or less across the entire screen. The control unit 20 applies the gain and then proceeds to step S106.

[0036] The control unit 20 determines whether or not to end the process (step S106). For example, when an operation to end the process of displaying a screen image is performed, the control unit 20 When an operation to change the image to be displayed is performed, or when the power of the display device 10 is turned off When the control unit 20 determines that the processing is to be ended (step If the answer is "Yes" in step S106, the process ends. If so (No in step S106), the process of step S101 is executed again.

[0037] 3 is a diagram illustrating an example of a display on the display unit 11. FIG. 4 is a diagram illustrating a history of the image shown in FIG. 5 is a diagram showing the signal level and gain of the image in FIG. In step S102, the peak level of the image is calculated from FIG. In step S103, as shown in Figs. 4 and 5, the clip level of the text window is It is determined whether the level is equal to or greater than the peak level. The clip level B1 of 101 is determined to be equal to or greater than the peak level of the image (step In this case, the clip level of the image signal is It remains B1.

[0038] 6 is a diagram illustrating an example of a display on the display unit 11. FIG. 7 shows the signal of the image in FIG. A diagram showing the level and gain. Note that the peak level of the radiographic image included in the image is the same as that in FIG. 4. In step S103, from FIG. 7, it is determined whether the clip level of the text window part is greater than or equal to the peak level of the image. Here, the clip level B2 (B2 < B1) of the text window part 101 is determined to be greater than or equal to the peak level of the image (Yes in step S103). In this case, from the state shown in FIG. 3, as shown in FIG. 7, the brightness of the text window part 101 is lowered to the clip level B 2, so that the text window 101 and the radiographic image have the same darkness. As shown in FIG. 6, the text window part 101 becomes darker than the text window part 101 shown in FIG. 3, and the brightness is adjusted accordingly. As shown in FIG. 12, the brightness is adjusted so that the text window part 101 becomes darker than the text window part 101 shown in FIG. 3. As shown in FIG. 6, the text window part 101 becomes darker than the text window part 101 shown in FIG. 3, and the brightness is adjusted accordingly. The brightness is adjusted so that it becomes darker.

[0039] FIG. 8 is a diagram for explaining an example of the display of the display unit 11. FIG. 9 is a diagram showing the signal level and gain of the image in FIG. 8. FIG. 10 is a diagram showing the histogram of the image shown in FIG. 8. Note that the clip level of the text window image included in the image is lower than that in FIG. 4. The value A of the signal level at which the slope in FIG. 9 changes is shown as the value A of the peak level of the histogram in FIG. 4. In step S103, from FIG. 10, it is determined whether the clip level of the text window part is greater than or equal to the peak level of the image. Here, the clip level B3 (B3 < B2) of the text window part 101 is determined to be less than the peak level of the image (No in step S103). In this case, a gain of 1 or less is applied to the image signal of the entire screen output to the display unit 11. As a result, the clip level of the image signal is the clip level B3, and the entire image becomes darker. is a diagram showing the histogram of the image shown in FIG. 8. Note that the clip level of the text window image included in the image is lower than that in FIG. 4. The value A of the signal level at which the slope in FIG. 9 changes is shown as the value A of the peak level of the histogram in FIG. 4. In step S103, from FIG. 10, it is determined whether the clip level of the text window part is greater than or equal to the peak level of the image. Here, the clip level B3 (B3 < B2) of the text window part 101 is determined to be less than the peak level of the image (No in step S103). In this case, a gain of 1 or less is applied to the image signal of the entire screen output to the display unit 11. As a result, the clip level of the image signal is the clip level B3, and the entire image becomes darker. is shown as the value A of the peak level of the histogram. In step S103, from FIG. 10, it is determined whether the clip level of the text window part is greater than or equal to the peak level of the image. Here, the clip level B3 (B3 < B2) of the text window part 101 is determined to be less than the peak level of the image (No in step S103). In this case, a gain of 1 or less is applied to the image signal of the entire screen output to the display unit 11. As a result, the clip level of the image signal is the clip level B3, and the entire image becomes darker. is determined to be less than the peak level of the image (No in step S103). In this case, a gain of 1 or less is applied to the image signal of the entire screen output to the display unit 11. As a result, the clip level of the image signal is the clip level B3, and the entire image becomes darker. is determined to be less than the peak level of the image (No in step S103). In this case, a gain of 1 or less is applied to the image signal of the entire screen output to the display unit 11. As a result, the clip level of the image signal is the clip level B3, and the entire image becomes darker. In this case, a gain of 1 or less is applied to the image signal of the entire screen output to the display unit 11. As a result, the clip level of the image signal is the clip level B3, and the entire image becomes darker. As a result, the clip level of the image signal is the clip level B3, and the entire image becomes darker. In the example shown in FIG. 8, the entire screen including the image is darker than in the example shown in FIG. (effect) As described above, in this embodiment, the peak level of the image displayed on the display unit 11 is If the image signal level in the window is higher than the peak level, the peak level is lowered to cover the entire image. According to this embodiment, the display unit 11 can display a picture. When both the image and the text window are displayed, the image visibility is minimized and the text is displayed The brightness of the window can be adjusted.

[0040] According to this embodiment, while viewing an image, other windows such as a text window with high brightness can be displayed. When opening the window, it reduces discomfort caused by glare. The decrease in brightness can be suppressed.

[0041] The components of the display device shown in the figure are conceptual functional components and are not necessarily physically the same as those shown in the figure. In other words, the specific configuration of each device is not limited to that shown in the drawings. Depending on the processing load and usage status of each device, all or part of the device can be controlled in any unit. The information processing system may be distributed or integrated, either locally or physically.

[0042] The display device may be configured with, for example, software such as a program loaded into a memory. In the above embodiment, the above hardware or software is implemented. These functional blocks are explained as functional blocks that are realized through cooperation. Regarding the This can be realized in a variety of ways.

[0043] The above-described components include those that can be easily imagined by a person skilled in the art and those that are substantially the same. Furthermore, the above-described configurations can be combined as appropriate. Various omissions, substitutions, or modifications of the configuration are possible within the scope not departing from the scope of the present invention.

[0044] This disclosure is in line with the Sustainable Development Goals (SDGs) of "All Contribute to the realization of "health and well-being for all" and contribute to value creation through healthcare products and services This includes matters related to: [Explanation of symbols]

[0045] 10 Display device 11 Display section 20 Control unit (display control device) 21 Detection unit 22 Analysis Department 23 Comparison section 24 Brightness control section 25 Display control unit

Claims

1. A display control device to which an image signal is supplied from an external device, a display control unit that receives the supplied image signal and controls the display unit to display a screen image; and, The peak level of the image signal of the text window portion displayed on the display unit and the a comparison unit for comparing the peak level of the image signal of the image immediately before the opening of the window unit with the peak level of the image signal of the image immediately before the opening of the window unit; In accordance with the comparison result of the comparison unit, the peak level of the image signal of the image is If the peak level of the image signal in the window section is higher than the peak level, the peak level is applied to the entire screen image. a brightness control unit that controls the gain to be adjusted in a direction that decreases the brightness; A display control device comprising:

2. The brightness control unit controls the image of the text window unit in accordance with the comparison result of the comparison unit. When the peak level of the signal is equal to or higher than the peak level of the image signal of the screen image, A clipping signal strength for displaying the maximum gradation among the image signals output from the control unit to the display unit. Control the playback level, The display control device according to claim 1 .

3. a display control step for receiving the supplied image signal and controlling the display unit to display a screen image; Pu and, The peak level of the image signal of the text window portion displayed on the display unit and the a comparison step of comparing the peak level of the image signal of the image immediately before the opening of the window portion with the peak level of the image signal of the image immediately before the opening of the window portion; and, In accordance with the comparison result of the comparing step, the peak level of the image signal of the image is If the peak level of the image signal in the window is greater than the peak level, the peak appears on the entire screen image. a brightness control step of controlling the gain to adjust the level downward; A program executed by a computer that operates as a display control device.

4. a display control step for receiving the supplied image signal and controlling the display unit to display a screen image; Pu and, The peak level of the image signal of the text window portion displayed on the display unit and the a comparison step of comparing the peak level of the image signal of the image immediately before the opening of the window portion with the peak level of the image signal of the image immediately before the opening of the window portion; and, In accordance with the comparison result of the comparing step, the peak level of the image signal of the image is If the peak level of the image signal in the window is greater than the peak level, the peak appears on the entire screen image. a brightness control step of controlling the gain to adjust the level downward; A display control method including:

Images