| 摘要 |
An image display method and an image display apparatus to solve the three-dimensional cueing confliction problem of the maximum intensity projection in the stereoscopic display method, while enabling users to select and render with emphasis the maximum intensity projection of the objects of interest, so that to realize the stereoscopic display. A three-dimensional surface which has equal distance to a sight-point is utilized as a reference surface, and the distances from all of the local maximum intensity points to this reference surface are calculated, then a weighting factor of each local maximum intensity point is calculated according to the distances and predetermined weighting function. After, the values of local maximum intensity points are adjusted according to the obtained weighting factors, and finally, the maximum intensity projection value is produced by synthesizing all of the adjusted values of the local maximum intensity points. |
| 主权项 |
1. An image processing apparatus comprising:
a memory; and a processor coupled to the memory, and the memory stores instructions that, when executed by the processor, cause the processor to: for each pixel on a projection image of a first sight-point: calculate all first local maximum intensity points from three-dimensional data along a line of sight determined by the first sight-point and the respective pixel, for each of the first local maximum intensity points, calculate a distance from the respective local maximum intensity point to a reference surface and then weight an intensity value of the respective local maximum intensity point according to the calculated distance and a distance weighting function, to obtain weighted intensity values of each of the first local maximum intensity points, and select a maximum value out of the weighted intensity values of all the first local maximum intensity points as the data of the respective pixel of the projection image of the first sight-point; and for each pixel of a projection image of a second sight-point: calculate all second local maximum intensity points from the three-dimensional data along a line of sight determined by the second sight-point and the respective pixel, for each of the second local maximum intensity points, calculate a distance from the respective second local maximum intensity point to the reference surface and then weight an intensity value of the respective second local maximum intensity point according to the calculated distance and the distance weighting function, to obtain weighted intensity values of each of the second local maximum intensity points, and select a maximum value out of the weighted intensity values of all the second local maximum intensity points as the data of the respective pixel of the projection image of the second sight-point; and display the projection image of the first sight-point from the three-dimensional data, as modified with the selected data for each respective pixel of the projection image of the first sight-point, and the projection image of the second sight-point from the three-dimensional data, as modified with the selected data for each respective pixel of the projection image of the second sight-point, wherein the reference surface is an isometric surface consisting of equidistant points from a middle point of the first sight-point and the second sight-point. |
