JPH0358577A - Picture quality improving device - Google Patents

Abstract

PURPOSE:To improve picture quality even when an object is moved by multiply ing a prescribed coefficient to differential data between picture data presently under inputting and picture data inputted to a memory in previous time, adding a multiplied result to the picture data previously inputted, and moving the input/output address of the picture memory while being matched with the mov ing quantity of the object. CONSTITUTION:One frame is stored in a picture memory 2 and for the input of the second frame, the data input/output address of the picture memory 2 is moved by an address moving part 10 based on the object moving quantity to be outputted by a moving quantity detecting part 8. Accordingly, the output of a subtracting part 3 is difference between the picture data previously inputted to the picture memory 2 and the picture data presently under inputting, namely, the differential data of random noise between two frames. Thus, when a multi plier is set to 1/4, for example, in a multiplier setting part 5, 1/4 of the differen tial data of this random noise is added to the picture data stored in the picture memory 2 and by repeating arithmetic input, the level of the random noise is reduced. Thus, even when the object is moved, the picture quality can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image quality improvement device for improving the image quality of images captured by a television camera or the like.

[Conventional technology]

Figure 4 is. This is a conventional image quality improvement device of this type.

In FIG. 4, {1} is an imaging unit that images a subject and outputs image data, such as a television camera.

T21 #-i Image memory for storing image data, (6
) is an addition unit that adds the image data output from this image memory (2) and the image data output from the imaging unit (1).
(71 is the addition output of this adder (6) and the image pickup unit (1)
) Force {switching unit that performs switching input of image data to be output to the image memory (2). aυ is a switching control section that performs switching control of this switching section (7). αυ is a display section that displays an image, and α2 is this display section α1) and the above image memory {
2} and the image data output by the image memory (2)
αJ is a divisor setting unit that sets the coefficient of this division unit α3.

Next, I will explain the operation. First, switch the switching unit (7) to the side that outputs the image data output by the imaging unit to, and
Store the frame in image memory (2). Next, switch the 91 converter 《7) to the side that outputs the output data of the adder (6), and record the one-image data output by t*EI (fn) and the image memory (2), and The adder (6) adds together the 1du elements of the same rank -112 in each frame of Shiruyamakyu data, and stores the addition result in the image memory (2).

This addition/storage operation is repeated for a predetermined number of frames.

Thereafter, each pixel carbonity data of one frame of image data obtained in the image memory (2) is divided by the number of times of IJO calculation in a division section (7), and is supplied to the display section U for image display.

In other words, in the case of conventional 1#K, ii! j as a means of improving quality. The random noise level is averaged and the signal-to-noise ratio (S
/N).

[Problem to be solved by the invention]

The conventional image quality improvement device is configured as described above.
Since the system is configured to add a predetermined number of frames to a zero-still image and then divide the images for display, there is a problem in that it is not possible to improve the quality of one surface when the subject moves.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an image quality improvement device that can improve image quality even when a subject moves.

[Means to solve the problem]

The image quality improvement device according to this invention is. In addition to the above conventional equipment,
Subtraction 3'J for subtracting the image data in the image memory from the image data output by the imaging section before the addition section. a multiplication section that multiplies the output of this subtraction section by a predetermined coefficient, a multiplier setting section that sets the coefficient of this multiplication section, a movement 'M+t detection section that detects the amount of movement of the subject, and a detection section that detects the amount of movement of the subject. The apparatus includes an address moving section that creates a data input/output address of the image memory from the moving vicinity outputted by the detecting section. The switching control section in the housing. It is configured to input the amount of movement outputted by the amount of movement detecting section to create a switching signal for the switching section, and is obtained by dividing a dividing section and a divisor setting section.

[Effect]

In addition to this invention, the subtracted data between the currently input image data and the previously input image data is multiplied by a predetermined coefficient and added to the previously input image data. Since the data input/output address of the image memory corresponding to :- is used, the image quality can be improved even when the subject moves.

〔Example〕

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

In FIG. 1, (1) is an imaging unit that images a subject and outputs image data, such as a television camera.

(2} is an image memory that stores image data; (3) is a subtraction unit that subtracts the image data f output by this image memory {2} from the image data output by the imaging unit (11).
4) is a multiplication part that multiplies the subtraction output of this subtraction part (3) by a coefficient, and (5) is a multiplier setting part that sets the coefficient of this multiplication part {4}. (6) is an addition D. which adds the multiplication value of the multiplication unit (4) and the image data output from the zero image memory (2). Department. (7) is a switching unit which performs switching input of the addition output of this adding unit {6} and the image support image outputted from the imaging and elevation unit fi+ to the image memory (2). (8) is a movement amount detection unit that detects the movement 11 of the subject, and (9) is a movement amount detection unit that detects the movement 11 of the subject.
), an address moving unit that creates data input/output addresses for
αO is a switching control unit that creates a switching signal for the switching unit (7) from the object movement amount output by the movement amount detection unit {8}; This is a display unit that displays images.

Image 1 configured as above {In the improvement device, the input of the first frame is the same as in the conventional system 1it, where the cut portion (7) is connected to the image pickup unit (1) which outputs the image data. Cut it. Record one frame in the image memory (2) tl. Do t.

The input for the second frame is the calculation input of the image data by moving the data crowd address of the image fy memory (2) in the address moving unit based on the amount of subject movement output by the movement 11 detection unit (8). Start at 4 times. Image t of the calculation input, that is, the addition output of the adder (6) (input pattern to the memory (2)).
This is done on the overlapping part 1 of the image data of the 1st frame and the currently input image height data of the 2nd frame, and for the remaining image data of the 2nd frame, that is, the new image data of the moving subject. The switching unit (7) is switched to the side that outputs the image data output by the imaging unit fil, and the image data currently being input is input and stored in the 11 image memory {2}. An example of the above two-frame input operation is shown below.
Shown in Figure 2. From the 3rd frame onwards. The input motion of the second frame and the input motion corresponding to the movement tI of the subject are returned to riiJ. An example of continuous hg input operation. It is shown in Figure 3.

On the other hand, the output of the subtraction unit (3) is the difference between the image data previously input to the image memory (2) and the current image data of the person, that is, the difference data of random noise between two frames. Therefore, if the multiplier is set to 174 in the multiplier setting section (5), for example. 17 of this random noise difference data
4 is written in the image memory (2) and added to the image data b, so it is possible to reduce the random noise level of the calculation input. [Effect] As described above, according to the present invention, by multiplying the difference data between the image data currently being input and the image data input into the image memory last time by a predetermined coefficient and adding it to the image data input last time. The random noise level was reduced and the input/output address of the image memory was configured to move according to the amount of movement of the subject. This has the effect of improving image quality even when the subject moves.

4. f) 11 Simple explanation of the drawings Figure 1 is a diagram of a one-dog example of the image quality improvement production of this series, and Figure 2
Figure 2-frame input operation example. FIG. 3 is a diagram of continuous input operation 911, and FIG. 4 is a diagram showing a conventional image quality modification device.

In the figure, >V, (l1 is the imaging unit, (2) is the image memory, (
3) is the subtraction part, (4) is the multiplier part, and (5) is the multiplier allowance part.
(6) is 3゜1 part of Canada. 《7) Pa switching section, (8) is the movement amount detection section. (9) is the address moving part, aG is the switching system -lA
ggR and αυ are the display section, aa is the division section, and (+3 is the divisor setting section.

In addition, the same reference numerals in the figures indicate 41 or equivalent parts.

2 flash No. 3 figure

Claims (1)

[Claims] an imaging unit that images a subject and outputs image data; an image memory that stores image data; a subtraction unit that subtracts the image data output by the image memory from the image data output by the imaging unit; a multiplication section that multiplies the subtraction output of the multiplication section by a coefficient; a multiplier setting section that sets the coefficient of the multiplication section; an addition section that adds the multiplication output of the multiplication section and the image data output from the image memory; a switching unit that performs addition output of the unit and switching input of image data output by the imaging unit to the image memory; a movement amount detection unit that detects the movement amount of the subject; and a movement amount detection unit that detects the movement amount of the subject; an address moving unit that creates a data input/output address of the image memory from the amount; a switching control unit that creates a switching signal for the switching unit from the amount of subject movement output by the movement amount detection unit; An image quality improvement device comprising a display section that displays an image based on image data.