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[0006] According to the structure of Japanese Patent Application Laid-Open No. 2004-512125 mentioned above, it is possible to follow the eye movement at high speed, but it is necessary to add a tracking device, which leads to an increase in the size of the device and requires an expensive device such as a scanner
[0007] If images are superimposed in an OCT device having a tracking device whose acquisition rate of tracking images is slower than that of ordinary OCT images, there is an OCT image without position information, and image superposition due to microsaccades peculiar to the eyeball also occurs The problem of low precision
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no. 1 example
[0021] A first embodiment of the present invention will be described below.
[0022] In this embodiment, the following situation will be described: by including an internal fixation lamp, using SLO to acquire fundus images, determining the amount of eye movement based on the SLO images acquired by SLO, and reflecting the results to the OCT equipment acquired In the processing of the OCT image, a superimposed image of a high-quality OCT image (for example, an image obtained by averaging a plurality of OCT images) is obtained.
[0023] Structure of OCT camera unit
[0024] figure 1 is a schematic diagram of the optical system configuration of the imaging apparatus according to the present embodiment. First, we will use the figure 1 The optical system configuration of a tomographic image acquisition unit for acquiring a tomographic image of the subject's eye or an OCT imaging unit serving as an imaging unit in the present invention will be described.
[0025] A low-coherenc...
no. 2 example
[0049] In this embodiment, the following example will be described: by including an internal fixation light, an SLO imaging unit, and an OCT imaging unit, detecting the movement of the eyeball from the SLO image, interpolating the movement amount of the eyeball, determining the position information of all OCT images, A high-quality OCT image is obtained by selecting OCT images to be used based on microsaccades and the amount of motion in the y direction (the value of Δy), and superimposing these OCT images in consideration of eye movement.
[0050] The structure of the device is the same as that of the first embodiment, so the description of the structure of the device will not be repeated.
[0051] In this example, the OCT imaging equipment is configured to be able to acquire 8×3mm 2 and the SLO camera unit is configured to capture 8×6mm at 20Hz 2 Image. Figure 5 Images acquired by each imaging unit are shown. 3 OCT images can be acquired in the time of acquiring 1 SLO im...
no. 3 example
[0056] In the first and second embodiments, the position information of the OCT image is determined by using the position information of the OCT images before and after the OCT image for which no position information exists.
[0057] In this embodiment, as a comparison, the position information of the OCT image to be determined is predicted according to a plurality of position information immediately before the OCT image, and if the predicted position information is compared to that in the first embodiment If the difference between the specified position information is large, the specified position information is not used.
[0058] The structure of the device is the same as that of the first embodiment, so the description of the structure of the device will not be repeated.
[0059] exist Figure 4 Among them, the position information of the OCT images O-2 and O-4 are determined according to the SLO images S-1 and S-2 respectively, and the position information of the OCT imag...
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Abstract
The invention provides a photographic apparatus and image processing method. To provide appropriate position information to a tomographic image of fundus in an ophthalmology apparatus for acquiring fundus tomographic images and fundus images. A calculation unit that calculates movement information of an eyeball from fundus images and a matching unit that matches the calculated movement information with fundus tomographic images are provided to the ophthalmology apparatus including a fundus image pickup apparatus to acquire an amount of movement of an eye to be inspected, wherein the calculation unit calculates movement information for the fundus tomographic image having no movement information to be further matched from the movement information of tomographic images before and after the fundus tomographic image so that movement information to be matched with the fundus tomographic image originally having no movement information is calculated from the movement information of tomographic images before and after the fundus tomographic image.
Description
technical field [0001] The invention relates to an imaging device and a control method thereof. In particular, the present invention relates to an imaging apparatus that uses eye movement information and reflects the eye movement information in a tomographic image of the fundus and a control method thereof. Background technique [0002] In recent years, an optical coherence tomography (OCT) apparatus capable of acquiring a tomographic image of the fundus has attracted attention. One of the reasons for the interest is that it can non-invasively diagnose the internal structures of the fundus that cannot be seen with other devices. In addition to this, a Fourier domain optical coherence tomography (FD-OCT) apparatus capable of photographing at high speed and having a proven track record has been attracting attention in the market. This OCT device is equipped with a fundus camera and a scanning laser ophthalmoscope (SLO) within the same device, and can acquire an OCT image of ...
Claims
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