| 摘要 |
PROBLEM TO BE SOLVED: To automatically determine the optimum value of a gradation processing parameter at the time of displaying a digital X-ray image on a film by converting the pixel value of the feature point of a reference digital image to density and converting this density to the pixel value of the feature point of an output image. SOLUTION: A parameter adjusting part 10 is newly provided to automatically determine the gradation parameter coinciding with a request to give a signal processing part. A reference table storage part 11 is provided with a film device connected with a digital image photographing device and stores two reference tables showing the corresponding relation between the pixel value and the density of a film digitizer. An image signal discriminating part 12 divides a standard digital image signal (a) inputted from the film digitizer into anatomic areas and obtains the pixel value of the image feature point being a pixel representing each area of them. A parameter determining part 13 determines the gradation processing parameter by using the pixel value of the image feature point and the two reference tables. |
