OPHTHALMOLOGIC CAMERA

PURPOSE:To achieve a photographing using strobo at a high accuracy in a short time by a method wherein an image of an eye to be inspected is stored and a quantity of emission of a light source photographing is compared with a reference quantity of emission to correct the image taken by a specified c...

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Bibliographische Detailangaben
Hauptverfasser: ISOGAI NAOKI, OZAKI MASAYA
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:PURPOSE:To achieve a photographing using strobo at a high accuracy in a short time by a method wherein an image of an eye to be inspected is stored and a quantity of emission of a light source photographing is compared with a reference quantity of emission to correct the image taken by a specified correction formula. CONSTITUTION:An image signal taken with CCD camera 14 is stored into a frame memory 33 in the form of an image data (c). Then, a quantity of light monitoring signal of a photodetector 26 which receives a quantity of light of a flash light source is converted into a digital signal data (a) to be introduced into a microcomputer 29. A quantity of light data (b) is stored as reference into a non-volatile memory 30 beforehand. The microcomputer 29 reads out a pixel data (c) from the frame memory 33 and converted into a pixel data (d) subjected to a correction calculation (d={b/a}Xc) to be returned to the frame memory again. This enables the obtaining of an image of a constant density regardless of changes in the quantity of light of a light source for photographing.