点评：一种基于对象的立体/自由视点电视的虚拟图像绘制方法，通过彩色图像的对象掩模图像将彩色图像分为对象内部区域、背景区域和边界区域，再根据三种区域将彩色图像划分成若干个尺寸大小不尽相同的块，对于整块映射型的块只需对该块中的一个像素点实施三维图像变换以确定将该像素点从彩色图像投影到虚拟视点彩色图像的坐标映射关系，然后整个块采用此坐标映射关系投影到虚拟视点彩色图像中，由于只对一个像素点实施三维图像变换，因而可有效提高整块映射型块的绘制速度；对于逐像素映射型的块，由于这些块主要位于边界区域，因此则仍采用逐像素映射的三维图像变换方法将块中的各个像素点映射到虚拟视点彩色图像中，有效保证了绘制精度。

Comment: The invention discloses an object-based virtual image drawing method of a three-dimensional/free viewpoint television, which comprises the following steps: dividing a color image into an inner region, a background region and a boundary region of an object through an object mask image of the color image, and then, dividing the color image into a plurality of blocks with different sizes according to the three regions; for a whole mapping type block, only needing to carry out three-dimensional image conversion on one pixel point in the block to determine the coordinate mapping relation for projecting the pixel point from the color image into a virtual viewpoint color image, and then, projecting the whole block into the virtual viewpoint color image by using the coordinate mapping relation, wherein because the three-dimensional image conversion is only carried out on one pixel point, the drawing speed of the whole mapping type block can be effectively improved; and for sequential pixel mapping type blocks, because the blocks are mainly positioned in the boundary region, still mapping each pixel point in the blocks into the virtual viewpoint color image by using a sequential pixel mapping type three-dimensional image conversion method , thereby effectively ensuring the drawing precision.