JPH07121702A - Image processing device - Google Patents

Abstract

(57) [Summary] [Purpose] Similar filtering processing effects are obtained with respect to a region of interest in an image input at various magnifications. [Structure] The image processing unit 1 includes a memory 2, a magnification storage unit 3,
It is connected to the command input unit 4, the filter storage unit 5, and the image monitor 6. By presetting a filter according to the magnification of the image and selecting and using it, it is possible to always obtain a constant filter effect.

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 processing a digital image based on the conditions at the time of input.

[0002]

2. Description of the Related Art In recent years, various image processings for the purpose of improving diagnostic accuracy have begun to be performed on fundus images by introducing digital image processing technology. Among these image processing,
Filtering is widely used as one of useful image processing methods. On the other hand, in a normal fundus image, a site necessary for image interpretation is photographed at various magnifications.

[0003]

However, in the related art, similar filter processing is performed on the fundus images of various magnifications by ignoring the photographing magnification. For example, when performing smoothing processing of an image as shown in FIGS. 4 and 5 using a smoothing filter as shown in FIG. The size of veins, hemorrhage, nerve fiber layer, etc. also changes. Therefore, even if the smoothing process is performed using the same smoothing filter, there is a problem that the effect of the filter process is not constant because the effect is not significant depending on the magnification or is too blurry.

The object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide an image processing apparatus that can obtain a good filter processing effect even for a region of interest in an image input at various magnifications.

[0005]

An image processing apparatus according to the present invention for achieving the above object comprises an image storage means for storing an image, a magnification storage means for storing a magnification of the image, and Then, it is characterized by comprising a filter storage means for storing at least two or more filters having the same effect, and an image processing means for performing image processing using the filter.

[0006]

The image processing apparatus having the above-described configuration always obtains a constant filtering effect by presetting the filter according to the magnification of the image.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 is a block circuit configuration diagram of an embodiment according to the present invention. An image processing unit 1 for interpreting commands and performing image processing includes a memory 2 for storing digital images and an image for each image stored in the memory 2. A magnification storage unit 3 that stores the magnification of the subject, a command input unit 4 such as a keyboard, a mouse, and a digitizer, a filter storage unit 5 that stores a filter used when performing image processing, and an image monitor 6 are connected. .

Here, in the memory 2, an image obtained by A / D converting an analog image signal by an image pickup means such as a CCD camera or a VTR (video tape recorder) not shown, 35 mm
An image obtained by a digital image input device such as a slide scanner or an output image of the image processing unit 1 is stored. The filter stored in the filter storage unit 5 includes parameters corresponding to the filter size and the magnification of the processing target image.

FIG. 2 is a flowchart showing a specific processing procedure. First, in step 11, the command input section 4 selects an image to be processed from the digital images stored in the memory 2, and in step 12, the magnification is set. The magnification information of the processing target image is loaded from the storage unit 3 automatically or by a command from the command input unit 4.
Next, in step 13, the type of filter to be executed such as a sharpening filter or a smoothing filter is input from the command input unit 4 or automatically designated by the image processing unit 1.

Further, in step 14, the parameter corresponding to the magnification of the image to be processed is changed to determine a parameter that does not change the filtering effect in the region of interest, and set as a filter for processing. Then, the filter processing is executed in the image processing unit 1 using the filter including the parameters set in this way. Finally, in step 15, the filtered image is displayed on the image monitor 6.

The magnification of each image may be registered in the magnification storage unit 3 at any timing from when the image is input to the memory 2 to when the magnification information of the image to be processed is loaded. . Further, the magnification storage unit 3 may store the image information of the subject once in another medium such as a film or a VTR depending on the input form of the processing target image stored in the memory 2. Magnification information in a part of the system from the subject to the memory 2 may be registered instead of the total magnification up to the image. Furthermore, the order of steps 12 and 13 is not limited to the order shown in the present embodiment, and step 13 can be executed first.

Further, the filters stored in the filter storage unit 5 may be sorted according to the size of the region of interest, the type of filter, and the magnification of the image to be processed. The types and the number of these filters can be set arbitrarily.

Further, a processing target position designating means for designating an arbitrary site in the image is connected to the image processing section 1, and a parameter of the filter is provided so that the site designated by the processing target position designating means can be processed well. May be determined.

[0014]

As described above, in the image processing apparatus according to the present invention, a filter corresponding to the magnification of an image is set in advance, and the filter is selected and used to obtain the filter effect due to the difference in magnification. It is not necessary to study in advance, and a constant filter effect can always be obtained in a short time. In particular, since it is often the case that the fundus image is photographed by freely using the wide angle and the narrow angle, the advantage that a similar filter effect can always be obtained in a short time is important.

[Brief description of drawings]

FIG. 1 is a block circuit configuration diagram of an embodiment.

FIG. 2 is a flowchart of a processing procedure.

FIG. 3 is an explanatory diagram of a smoothing filter.

FIG. 4 is an explanatory diagram of a fundus image.

FIG. 5 is an explanatory diagram of a fundus image.

[Explanation of symbols]

 1 image processing unit 2 memory 3 magnification storage unit 4 command input unit 5 filter storage unit 6 image monitor

Claims (2)

[Claims] 1. An image storage means for storing an image, a magnification storage means for storing a magnification of the image, a filter storage means for storing at least two filters having the same effect between the magnifications, and the filter. An image processing apparatus comprising: an image processing unit that performs image processing using the image processing apparatus. 2. The image processing apparatus according to claim 1, wherein the filter satisfactorily filters the part designated by the processing target position designating unit that designates an arbitrary part in the image.