Image synthesis method, image synthesizer, and recording medium on which image synthesis program is recorded

A computer readable recording medium on which an image synthesis program for synthesizing a first image and a second image without a seam on the basis of coordinate values, on the first image, respectively corresponding to a plurality of feature points which are set in a portion, which is overlapped with the second image, of the first image and coordinate values, on the second image, at positions, on the second image, respectively corresponding to the feature points has been recorded, comprising:

• the first step of dividing both the images for each triangular patch having the three adjacent feature points as vertexes, :and finding a transform equation for finding a position, on the first image, corresponding to a point on the second image for the triangular patch;
• the second step of finding the coordinate value, on the first image, corresponding to each of pixels in each of the triangular patches, on the second image using the transform equation calculated for the triangular patch;
• and
• the third step of synthesizing the first image and the second image using the coordinate value, on the first image, corresponding to each of the pixels on the second image which is found at the second step.

An image synthesis method for synthesizing a first image and a second image, comprising:

• the first step of extracting from the first image a plurality of partial images which are effective for tracking by an optical flow between the first image and the second image as feature points;
• the second step of tracking a point, on the second image, corresponding to each of the feature points on the first image on the basis of the optical flow between both the images;
• the third step of finding a coordinate value, on the first image, corresponding to each of pixels on the second image on the basis of each of the feature points on the first image and the corresponding point on the second image which is found at the second step;
• and
• the fourth step of synthesizing the first image and the second image on the basis of the coordinate value on the first image, corresponding to each of the pixels on the second image, which is obtained at the third step,
• the third step comprising the step of dividing both the images for each triangular patch having three adjacent feature points as vertexes, and finding a transform equation for finding a position, on the first image, corresponding to the point on the second image for the triangular patch, and the step of finding the coordinate value, on the first image, corresponding to each of the pixels in the triangular patch on the second image using the transform equation calculated for the triangular patch.