JP2014198224A5

JP2014198224A5 -

Info

Publication number: JP2014198224A5
Application number: JP2013097732A
Authority: JP
Filing date: 2013-05-07
Publication date: 2016-06-23
Anticipated expiration: 2033-05-07

Description

本画像処理装置は、被検眼による収差が補正された画像である第１眼底画像と前記第１眼底画像よりも画角が広くかつ解像度が低い第２眼底画像との位置合わせを前記第２眼底画像よりも画角が狭くかつ解像度が高く更に前記第１眼底画像よりも画角が広くかつ解像度が低い第３眼底画像を用いて行う位置合わせ手段と、前記被検眼の黄斑から前記位置合わせ手段により位置合わせされた前記第１眼底画像における所定の位置までの距離を取得する距離取得手段と、前記距離と前記第１眼底画像に含まれる視細胞に関する情報とから前記被検眼の状態を評価する評価手段とを備える。 The image processing apparatus aligns the first fundus image, which is an image in which aberrations due to the subject's eye are corrected, and the second fundus image having a wider angle of view and lower resolution than the first fundus image. and line intends alignment means using the third fundus image has low wide and resolution angle than a narrow angle of view and further resolution is rather high the first fundus image than the image, the macular of the eye to be examined The state of the eye to be examined from distance acquisition means for acquiring a distance to a predetermined position in the first fundus image aligned by the alignment means, and information on the photoreceptor cells contained in the distance and the first fundus image And evaluation means for evaluating.

Claims

The first fundus image, which is an image in which the aberration due to the subject's eye is corrected, and the second fundus image having a wider angle of view and lower resolution than the first fundus image are aligned with each other. narrow and the row intends alignment means using the third fundus image angle than further the first fundus image resolution rather high, wide and resolution have low,
Distance acquisition means for acquiring a distance from the macular of the subject eye to a predetermined position in the first fundus image aligned by the alignment means;
An image processing apparatus comprising: an evaluation unit that evaluates the state of the eye to be examined from the distance and information on photoreceptor cells included in the first fundus image.

The alignment means is configured to determine the first fundus image based on the alignment result between the second fundus image and the third fundus image and the alignment result between the third fundus image and the first fundus image. The image processing apparatus according to claim 1, wherein alignment between the image and the second fundus image is performed.

Setting means for setting an area for the first fundus image;
The distance acquisition means acquires a distance from the position of the macula to a predetermined position in the region,
3. The image processing according to claim 1, wherein the evaluation unit evaluates the state of the eye to be examined from a distance to a predetermined position in the region and information relating to a photoreceptor cell in the region. apparatus.

The image processing apparatus according to claim 3, wherein the setting unit changes a setting method of the region according to a positional relationship between the first fundus image and the macula.

The setting means sets the region so that a width in a direction perpendicular to a straight line connecting the first fundus image and the macula is larger than a width in a direction parallel to the straight line. 4. The image processing apparatus according to 4.

The image processing apparatus according to claim 3, wherein the setting unit sets the region so as not to include a blood vessel region included in the first fundus image.

The image processing apparatus according to claim 3, wherein the predetermined position is a center of the region.

The image processing apparatus according to claim 1, wherein the information on the photoreceptor cell is a density of the photoreceptor cell.

A detection means for detecting the photoreceptor cells from the first fundus image;
The said detection means changes the parameter used in order to detect the said photoreceptor cell according to the said distance acquired by the said distance acquisition means, The any one of Claims 1-8 characterized by the above-mentioned. Image processing device.

The image processing apparatus according to claim 1, wherein the evaluation unit compares information relating to the photoreceptor cell with reference information corresponding to the distance.

The image processing apparatus according to claim 10, further comprising display control means for displaying the first fundus image on a display unit in a display form based on the comparison result.

The image processing apparatus according to claim 11, wherein the display control unit changes the brightness of the first fundus image according to a difference between information relating to the photoreceptor cell and reference information corresponding to the distance.

The display control means presents an area of a region on the first fundus image in which a difference between information relating to the photoreceptor cell and reference information corresponding to the distance is a predetermined value or more. The image processing apparatus described.

14. The display control unit according to any one of claims 11 to 13, wherein the display control unit superimposes the first image and the second image that have been aligned by the alignment unit on the display unit. An image processing apparatus according to 1.

A resolution converting means for converting an image having a high resolution into the same resolution as an image having a low resolution at the time of positioning by the positioning means;
The image processing apparatus according to claim 1, wherein the alignment unit performs alignment using the image after the resolution conversion.

It further comprises a detecting means for detecting a macula,
The positioning means includes a plurality of the first fundus images obtained by imaging different positions on the fundus of the eye to be examined and the second fundus images obtained by imaging the plurality of third fundus images obtained by imaging different positions on the fundus. Use to align,
The detection means detects the macula from the first fundus image including the macula among the plurality of first fundus images aligned by the alignment means,
The distance acquisition unit includes a predetermined position in the first fundus image that does not include the macula among the plurality of first fundus images aligned by the alignment unit from the macula detected by the detection unit. The image processing apparatus according to claim 1, wherein a distance up to is acquired.

The image processing apparatus according to claim 1, wherein the distance acquisition unit acquires a distance from the center of the macula to a predetermined position in the first fundus image.

The second fundus image is obtained by aligning the first fundus image, which is an image in which the aberration caused by the eye to be corrected is corrected, and the second fundus image having a wider angle of view and lower resolution than the first fundus image. a positioning process intends line using a third fundus image viewing angle is wide and the resolution have lower than high rather further the first fundus image is narrow and resolution angle than,
A distance acquisition step of acquiring a distance from the macular of the eye to be examined to a predetermined position in the first fundus image aligned by the alignment unit;
An image processing method, comprising: an evaluation unit that evaluates a state of the eye to be examined from the distance and information relating to a photoreceptor cell included in the first fundus image.

The program for making a computer perform each process of Claim 18.

A first fundus image, which is an image in which aberrations due to the subject's eye are corrected, a second fundus image having a wider angle of view and lower resolution than the first fundus image, and a smaller angle of view and resolution than the second fundus image. Acquisition means for acquiring a third fundus image that is higher and has a wider angle of view and lower resolution than the first fundus image;
Alignment means for performing alignment between the first fundus image and the second fundus image using the third fundus image;
An image processing apparatus comprising:

The alignment means is configured to determine the first fundus image based on the alignment result between the second fundus image and the third fundus image and the alignment result between the third fundus image and the first fundus image. 21. The image processing apparatus according to claim 20, wherein the image is aligned with the second fundus image.