IMAGE PROCESSOR, AND IMAGE PROCESSING PROGRAM

• Main Authors: HASHIDA NORIYASU, BABA KOICHI, HOSHIKAWA YASUHIRO, NISHIDA KOJI, SUMIYA TOSHIBUMI
• Format: Patent
• Language: English; Japanese
• Published: 04.06.2015
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

PROBLEM TO BE SOLVED: To properly determine the existence/absence of a blood vessel regardless of variations in brightness due to a place of an examined eye image.SOLUTION: A CPU 2 of a PC 1 sets a determination area J including a first area j1 included in a processing area R of an image of an anterior eye part having one or more pixels, and a second area j2 surrounding the first area j1 and being smaller than the processing range R (S4). The CPU 2 sequentially changes a position of the determination area J in the processing area R on the basis of a prescribed scanning procedure (S5). In this case, the CPU 2 determines whether the first area j1 is a blood vessel part bv in each position of the determination area by using luminance information of the first area j1 and luminance information of the second area j2 (S5). Then, the CPU 2 acquires blood vessel information in the processing range R in a RAM 4 on the basis of a determination result by processing of S5. 【課題】被検眼画像の場所による明るさのばらつきに拘わらず、血管の有無を適正に判定すること。【解決手段】ＰＣ１のＣＰＵ２は、前眼部画像の処理範囲Ｒに含まれ１又はそれ以上の画素を持つ第１領域ｊ１と、その第１領域ｊ１を囲み処理範囲Ｒよりも小さな第２領域ｊ２と、を有する判定領域Ｊを設定する（Ｓ４）。また、ＣＰＵ２は、判定領域Ｊの位置を、所定の走査手順に基づいて処理範囲Ｒの中で順次変更する（Ｓ５）。このとき、ＣＰＵ２は、第１領域ｊ１の輝度情報と第２領域ｊ２の輝度情報とを用いて第１領域ｊ１が血管部分ｂｖであるか否かを、判定領域の位置毎に判定する（Ｓ５）。そして、ＣＰＵ２は、処理範囲Ｒ内の血管情報をＳ５の処理による判定結果に基づいてＲＡＭ４に取得する。【選択図】 図２