Synthetic image generation system and rear image display system
AssigneeAlps Alpine Co., Ltd.
InventorKota Mitsuya
Life of this patent
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Abstract
A synthetic image generation system for generating a synthetic image by synthesizing a first image captured by a first camera and a second image captured by a second camera is provided. At least a part of the field of view of the first camera and at least a part of the field of view of the second camera overlap each other. The synthetic image is an image in which at least a part of the first image and at least a part of the second image are joined together. The synthetic image generation system at least includes a first image conversion unit, a second image conversion unit, a comparative image extracting unit, a correction gain calculation unit, a correction unit, a second image inverse-conversion unit, and a synthesis unit.
Claims11
A synthetic image generation system for generating a synthetic image by synthesizing a first image captured by a first camera and a second image captured by a second camera, at least a part of a field of view of the first camera and at least a part of a field of view of the second camera overlapping each other, the synthetic image being an image in which at least a part of the first image and at least a part of the second image are joined together, the synthetic image generation system comprising circuitry configured to:
- apply a predetermined image conversion to the first image to generate a post-conversion first image;
- apply the predetermined image conversion to the second image to generate a post-conversion second image;
- set a first comparative area in the post-conversion first image, the first comparative area being a part of an overlapping area of the field of view of the first camera and the field of view of the second camera:
- set a second comparative area in the post-conversion second image, the second comparative area corresponding to the first comparative area such that a same object is captured in the first comparative area and the second comparative area;
- extract an image in the first comparative area from the post-conversion first image as a first comparative image;
- extract an image in the second comparative area from the post-conversion second image as a second comparative image;
- calculate a ratio of a representative value among pixel values of the first comparative image to a representative value among pixel values of the second comparative image as a correction gain for the post-conversion second image;
- correct the post-conversion second image based on the correction gain to generate a post-correction second image;
- apply an inverse conversion of the predetermined image conversion to the post-correction second image to generate a post-inverse-conversion second image;
- and
- synthesize the post-inverse-conversion second image with the first image or with an image obtained by applying the inverse-conversion of the predetermined image conversion to the post-conversion first image, to generate a synthetic image,
- wherein the predetermined image conversion is performed such that a ratio of a pixel value in the post-conversion first image, obtained from a first pixel value in the first image through the predetermined image conversion, to a pixel value in the post-conversion second image, obtained from a second pixel value in the second image through the predetermined image conversion, is closer to 1 than is a ratio of the first pixel value to the second pixel value.
Dependencies are inferred from the claim text.