Patent Document ID: 8538192
Application ID: 13260278
Patent Status: 1

Claim One:
1. An image processing device that sequentially generates a synthetic image by joining a first image, which is a single image or is constituted by a plurality of the images joined together, and a second image that is input, every time when the second image is input, the device comprising: an overlapping region obtainment portion that obtains a motion vector on the basis of the second image and an image input immediately before the second image among the images constituting the first image, and obtains an overlapping region where the image input immediately before and the second image overlap each other on the basis of the obtained motion vector; a brightness-value conversion factor calculation portion that calculates a brightness conversion factor for converting a brightness value of the first image or a brightness value of the second image on the basis of the brightness value of the first image and the brightness value of the second image in the overlapping region so that a change in the brightness values between the first image and the second image becomes small; and a synthetic image generation portion that generates the synthetic image by converting the first image or the second image using the brightness conversion factor and by joining the first image and the second image, wherein the synthetic image generation portion determines the brightness-value conversion factor at the synthetic position on the basis of the distance from the joint at the synthetic position, derives a correction function that converts the brightness value of the second image on the basis of the determined brightness-value conversion factor and calculates the brightness value of the second image used at the synthetic position on the basis of the correction function and the brightness value of the second image.