JPH07261731A - Image processor - Google Patents

Abstract

PURPOSE:To provide a specifying position displaying method capable of making a cursor or a line always easy to see in spite of the brightness or the color of an image becoming a background. CONSTITUTION:In a specifying position displaying method displaying a cursor 30 or a line on a screen so as to specify the desired position of an image G displayed on a screen 6, this device is provided with a frame memory 2 storing the image, an overlay memory 5 storing the cursor and the image while superposing them and a control device 10 changing the brightness of the cursor stored in the overlay memory 5. Then, the control device 10 reads out an image data at the position where the cursor or the line is to be displayed from the frame memory 2 to obtain the brightness of the image at the position from the read image data and changes the brightness of the cursor or the line when the brightness of the image reaches a reference value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus for displaying a cursor or a line on a screen for designating a predetermined position of an image displayed on the screen.

[0002]

2. Description of the Related Art Conventionally, there has been known an image processing apparatus for enlarging and displaying a part of a fundus image or composing the fundus images to create a panoramic image.

Such an image processing apparatus displays a fundus image on a display and also displays a cursor. By moving the cursor, a predetermined portion of the fundus image is designated and the designated portion is enlarged and displayed. Or, it synthesizes another image at the designated location.

[0004]

By the way, the brightness of the cursor displayed on the display is set to be large for easy viewing. Further, in the case of color display, a color that is unlikely to be the same as the color of the image is set.

However, the lightness and color of the cursor are fixed regardless of the lightness and color of the background image.

For this reason, when the image displayed on the display has a portion having high brightness, when the cursor is moved to that portion, the cursor becomes very difficult to see. Further, even in the case of color display, if the displayed image has the same color portion as the cursor, there is a problem that the cursor becomes very difficult to see if the cursor is moved to the color portion.

Further, there is a similar problem when a line is drawn on the image.

The present invention has been made in view of the above problems, and an object thereof is to provide an image processing apparatus capable of always making a cursor and a line easy to see regardless of the brightness and color of the background image. To do.

[0009]

In order to achieve the above object, in the invention of claim 1, an image processing apparatus for displaying a cursor or a line at a desired position of an image displayed on a screen for designating the desired position. In the above, the lightness changing means for changing the lightness of the cursor or the line corresponding to the lightness of the image around the position where the cursor or the line is displayed is provided.

According to a fourth aspect of the invention, in an image processing apparatus for displaying a cursor or line at a desired position of an image displayed on a screen in order to specify the desired position, the peripheral portion of the position where the cursor or line is displayed. The color changing means for changing the color of the cursor or the line to a color different from the color of the image is provided corresponding to the color of the image in FIG.

According to the invention of claim 8, in an image processing apparatus for displaying a cursor or a line at a desired position for designating a desired position of an image displayed on a screen, a pixel having high lightness and a pixel having low lightness are provided. Image forming means for arranging the cursors or lines alternately are provided.

According to a ninth aspect of the present invention, in an image processing apparatus for displaying a cursor or a line at a desired position of an image displayed on a screen, the central portion of the image of the cursor or the line is provided. An image forming means for forming a cursor image or a line image having a lightness different from that of the outer peripheral portion of the image surrounding the central portion is provided.

According to a tenth aspect of the present invention, in an image processing apparatus for displaying a cursor or a line at a desired position for designating a desired position of an image displayed on a screen, two different colors are alternately arranged. An image forming means for forming the cursor or the line is provided.

According to a twelfth aspect of the present invention, in an image processing apparatus for displaying a cursor or a line at a desired position of the image displayed on the screen, the central portion of the image of the cursor or the line is provided. An image forming means for forming a cursor image or a line image having a color different from that of the outer peripheral portion of the image surrounding the central portion is provided.

[0015]

According to the invention of claim 1, the brightness changing means changes the brightness of the cursor or the line in correspondence with the brightness of the image in the peripheral portion of the position where the cursor or the line is displayed. It will be easy to see without regard.

According to the invention of claim 4, the color changing means changes the color of the cursor or the line to a color different from the color of the image corresponding to the color of the image in the peripheral portion of the position where the cursor or the line is displayed. , The cursor or the line is easy to see regardless of the color of the image.

In the eighth aspect of the invention, the image forming means forms the cursor or line by alternately arranging pixels having high lightness and pixels having low lightness to form the cursor or line, so that the cursor or line is easy to see regardless of the lightness of the image. Will be things.

In the invention of claim 9, the image forming means forms a cursor image or a line image having different brightness in the central portion of the image of the cursor or line and the outer peripheral portion of the image surrounding the central portion. Alternatively, the lines are easy to see regardless of the brightness of the image.

In the tenth aspect of the invention, the image forming means alternately arranges two different colors to form a cursor or a line, so that the cursor or line is easy to see regardless of the color of the image.

According to the twelfth aspect of the invention, the image forming means forms a cursor image or a line image having different colors at the central portion of the cursor or line image and the outer peripheral portion of the image surrounding the central portion. Alternatively, the line becomes easy to see regardless of the color of the image.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an image processing apparatus according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is an image pickup device mounted on a fundus camera. 2 is a frame memory that stores a fundus image captured by the image sensor 1 each time the joystick switch 3 is pressed, 4 is a storage device that stores the fundus image stored in the frame memory 2, and 5 is a frame memory 2 that is stored. An overlay memory for superimposing and storing a fundus image and a cursor, which will be described later, 6 is a monitor for displaying a fundus image which is a moving image captured by the image sensor 1 and a fundus image which is a still image stored in the overlay memory 5, 7 is a cursor memory that stores the shape and color of the cursor, 1
Reference numeral 0 is a control device including a CPU and the like. The control device 10 includes a RAM and a ROM (not shown).

The control device 10 stores the fundus image stored in the frame memory 2 in the storage device 4 by operating the keys of the keyboard 8, reads out the fundus image stored in the storage device 4 into the frame memory 2, and takes an image. The fundus image captured by the element 1 and the still image stored in the overlay memory 5 are displayed on the monitor 6.

In addition, the control unit 10 controls the monitor 6 as shown in FIG. 2 based on the key operation of the mouse 9 and the keyboard 8.
In order to display the cursor 20 at a predetermined position on the display screen 6A, the cursor data read from the cursor memory 7 is changed and stored in the overlay memory 5 at a predetermined address.

Next, the operation of the above embodiment will be described.

First, a case where the fundus image is a black and white image and this image is displayed on a black and white monitor will be described.

When the reticle switch 3 is operated when the fundus image is captured on the image sensor 1 and displayed on the monitor 6, the fundus image captured by the image sensor 1 is stored in the frame memory 2.

Then, the control device 10 reads the data from the frame memory 2 at the address corresponding to the position where the cursor is displayed.

For example, as shown in FIG. 3, a cursor 30
Is displayed on the screen 6A of the monitor 6, the image data (the image data of the shaded portion A in FIG. 3) having 3 pixels in the vertical and horizontal directions centering on the position of the cursor 30 is read. The control device 10 calculates and calculates the average brightness of the shaded portion A from the read image data, and is the calculated average brightness value equal to or greater than the gradation value 224 (reference value) indicating the brightness of the image? Determine whether or not.

Here, the brightness (luminance) of the image is from 0 to 2
Divided into 55 levels, "0" indicates the darkest black, and "2"
55 ”shows the brightest white. The cursor 30 is normally displayed in the brightest white with a gradation of "255". Cursor image data such as the shape and brightness of the cursor 30 is stored in the cursor memory 7.

When the average brightness of the shaded area A is "224" or more, the control device 10 changes the brightness data of the cursor image data stored in the cursor memory 7 from "255" to "0". The control device 10 functions as a brightness changing unit that changes the brightness of the cursor 30. Then, the control device 10 stores the cursor image data obtained by converting the brightness data in the overlay memory 5 together with the image data stored in the frame memory 2.

The image stored in the overlay memory 5 is displayed on the monitor 6. That is, as shown in FIG. 4, the cursor 30 is displayed in the darkest black, the distinction between the bright fundus image G and the cursor 30 is clear, and the cursor 30 is very easy to see.

When the cursor 30 is displayed in black, the control device 10 changes the reference value from "224" to "208". That is, the control device 10 functions as a reference level changing unit that slightly lowers the reference level. The change of the reference value prevents the cursor 30 from frequently changing to black and white due to the slight movement of the cursor 30.

When the cursor 30 is moved to a dark portion of the image G by operating the keys of the mouse 9 and the keyboard 8, that is, when it is moved to an image portion whose average brightness is "208" or less, the cursor is moved in the same manner as above. The average brightness in the peripheral portion of the position of 30 is obtained, and the cursor 30 is changed from black to white and displayed. In this case, the reference value is "22
4 ”to the original value.

While the cursor 30 is moving, the image data around the cursor 30 is read out as described above to obtain the average brightness, and the cursor 30 is displayed in white or black based on the average brightness.

When a monochrome image is displayed on a color monitor, the cursor 30 is moved to the brightest green (the brightness of the green is "25").
5 ”). Then, as shown in FIG. 3, when the average brightness of the shaded portion A is “224” or more, the cursor 30 is displayed in dark green (green brightness “128”). Also in this case, the reference value is changed from "224" to "208".

Next, the case of displaying a color image on a color monitor will be described.

Also in this case, the cursor 30 is displayed in the brightest green color (green brightness "255").
The image data (shape, lightness, and color data) of is also stored in the cursor memory 7 as in the above.

Similar to the monochrome display, the image data (image data of the shaded area A in FIG. 3) in which the vertical and horizontal directions are three pixels centered on the position of the cursor 30 is read. The control device 10 calculates and calculates the average lightness of red, green, and blue of the shaded portion A from the read image data.

When the average brightness of red is less than the reference value "32", the average brightness of green is more than the reference value "224", and the average brightness of blue is less than the reference value "32", the control unit 10 moves the cursor 30 to the bright green. The display of (luminance “255”) is changed to the display of dark green (luminance “0”). That is, the control device 10 functions as a color changing unit that changes the color of the cursor 30. Then, when the shaded portion A is close to bright green, the cursor 30 becomes easy to see by changing the cursor 30 to dark green.

Also in this case, when the cursor 30 is changed to dark green, the control device 10 changes the red reference value to "48", the green reference value to "208", and the blue reference value to "48". To do. This change prevents frequent changes in the brightness of the cursor 30 due to slight movement of the cursor 30. The control device 10 has a function as reference value changing means for slightly lowering the reference value.

When the cursor 30 is moved to a dark green portion, that is, when it is moved to an image portion reaching the above-mentioned reference value (red "48" or more, green "208" or less, blue "48" or more), The cursor 30 is displayed in the original bright green in the same manner as above. And the reference value is the original value (red "32" or less, green "224" or more, blue "32" or less)
Returned to.

In this embodiment, the brightness of green is changed to change the color, but it may be changed to a color different from green.
In the above embodiment, the brightness of the cursor 30 is automatically changed, but it may be changed manually by operating the keyboard 8.

In the above embodiment, the lightness of the cursor 30 is changed by obtaining the average lightness of the image around the cursor 30, but the maximum lightness and the minimum lightness around the cursor 30 are obtained, and the intermediate lightness is obtained from these lightnesses. The brightness of the cursor 30 may be changed based on this intermediate brightness.

5 and 6 show another display method. In this embodiment, the cursors 40 and 50 can be clearly seen without changing the brightness and color of the cursors 40 and 50 according to the brightness and color of the background image.

The cursor 40 shown in FIG. 5 is formed by arranging black pixels 41 and white pixels 42 alternately. By forming the cursor 40 in this way, the white pixels 42 of the cursor 40 can be clearly seen in the dark portion of the image, and the black pixels 41 of the cursor 40 can be seen in the bright portion of the image. It will be clearly visible. The display of the cursor 40 is also performed by storing the image data of the cursor 40 in the cursor memory (image forming means) 7.

In the case of color display, colors having different colors are alternately arranged. With this configuration, even if one color is difficult to see, the other color is easily visible, so that the cursor 40 can be clearly seen regardless of the color of the image. In this case, in particular, when the cursors 40 are arranged so as to have a complementary color relationship with each other, the cursor 40 becomes clearer regardless of the color of the image.

The cursor 50 shown in FIG. 6 has a white pixel 51 at the center and a black pixel 52 at the outer periphery. In the case of color display, the central portion and the outer peripheral portion are formed of different colors. Also in this case, if the cursors 50 are arranged so as to have a complementary color relationship with each other, the cursor 50 becomes clear regardless of the color of the image. The display of the cursor 50 is also performed by storing the image data of the cursor 50 in the cursor memory 7.

In the above embodiment, the cursor 30,4 is displayed on the screen.
The case of displaying 0, 50 has been described, but the present invention is not limited to this, and it is of course applicable to the case of drawing a measurement line on an image on the screen.

[0050]

According to the present invention, the cursor and the line are always easy to see regardless of the brightness and color of the background image.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an image processing apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a fundus image displayed on a monitor.

FIG. 3 is an explanatory diagram showing a cursor.

FIG. 4 is an explanatory diagram showing a cursor whose brightness is changed.

FIG. 5 is an explanatory diagram showing another display method of the cursor.

FIG. 6 is an explanatory diagram showing another display method of the cursor.

[Explanation of symbols]

 2 frame memory 5 overlay memory 6 monitor 7 cursor memory 10 control device 30 cursor G image

Claims (13)

[Claims] 1. An image processing device for displaying a cursor or a line at a desired position for designating a desired position of an image displayed on a screen, wherein the brightness of the image at the periphery of the position where the cursor or the line is displayed An image processing device, characterized in that a brightness changing means for changing the brightness of a cursor or a line is provided correspondingly. 2. The image processing apparatus according to claim 1, wherein the lightness changing unit lowers the lightness level of the cursor or the line below a predetermined level when the lightness of the image is equal to or higher than a preset reference level. . 3. The image processing apparatus according to claim 2, further comprising a reference level changing means for slightly lowering the reference level when the brightness level of the cursor or the line is lowered below a predetermined level. 4. An image processing apparatus for displaying a cursor or a line at a desired position for designating a desired position of an image displayed on a screen, wherein the color of the image around the position where the cursor or the line is displayed is changed. An image processing apparatus, which is provided with a color changing unit that changes a color of a cursor or a line to a color different from that of the image correspondingly. 5. The image processing apparatus according to claim 4, wherein the color changing means changes the color of the cursor or the line when the value indicating the color of the image is equal to or larger than a preset reference value. . 6. The image processing apparatus according to claim 5, further comprising a reference value changing means for slightly lowering the reference value when the color of the cursor or the line is changed. 7. The image processing apparatus according to claim 4, wherein the color of the changed cursor or line and the color of the original cursor or line have a complementary color relationship with each other. 8. An image processing apparatus for displaying a cursor or a line at a desired position for designating a desired position of an image displayed on a screen, wherein pixels of high brightness and pixels of low brightness are alternately arranged. An image processing apparatus comprising an image forming means for forming the cursor or the line. 9. An image processing apparatus for displaying a cursor or a line at a desired position for designating a desired position of an image displayed on a screen, the central part of the image of the cursor or line, and surrounding the central part. An image processing apparatus, comprising: an image forming means for forming a cursor image or a line image having a brightness different from that of an outer peripheral portion of the image. 10. An image processing apparatus for displaying a cursor or a line at a desired position for designating a desired position of an image displayed on a screen, wherein two different colors are alternately arranged and the cursor or line is displayed. An image processing apparatus comprising an image forming means for forming. 11. The image processing apparatus according to claim 10, wherein the two colors have a complementary color relationship with each other. 12. An image processing apparatus for displaying a cursor or a line at a desired position for designating a desired position of an image displayed on a screen, the central part of the image of the cursor or line, and surrounding the central part. An image processing apparatus comprising: an image forming unit that forms a cursor image or a line image having a color different from that of the outer peripheral portion of the image. 13. The image processing apparatus according to claim 12, wherein the two colors have a complementary color relationship with each other.