Title:
画像の鮮鋭度判断方法、画像の鮮鋭度を判断する処理を行うためのプログラムを記録した記録媒体、画像処理装置および写真焼付装置
Document Type and Number:
Japanese Patent JP4374686
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To appropriately, easily and also stably perform the sharpness judgement of an original image by using the original image and its blurred image. SOLUTION: When a BGR/luminance converting part converts the BGR image data of the original image into luminance image data (pixel values) (S1), a smoothed image preparing part prepares the smoothed image of the original image on the basis of the pixel values (S2). A 1st edge intensity calculating part calculates the edge intensity of the original image (S3). Meanwhile, a 2nd edge intensity calculating part calculates the edge intensity of the smoothed image (S4). A sharpness deciding part calculates the relative frequency distribution of an edge intensity ratio (S5). The sharpness judgement part calculates the ratio of a relative frequency corresponding to mutually different edge intensity ratios (S6) and judges the sharpness of the original image by judging whether or not the ratio is equal to or greater than a threshold (e.g. 1) (S7).
Inventors:
Kougo Koichi
Application Number:
JP34542499A
Publication Date:
December 02, 2009
Filing Date:
December 03, 1999
Export Citation:
Assignee:
Noritsu Koki Co., Ltd.
International Classes:
G06T5/20; G06T7/60; H04N1/409
Domestic Patent References:
| JP11275343A | ||||
| JP11272853A | ||||
| JP63056063A | ||||
| JP61157165A | ||||
| JP53070428A | ||||
| JP61007443A |
Attorney, Agent or Firm:
Ryuichi Kijima