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Image processing device, drive supporting device, and image processing method

An image processing device and image technology, applied in image data processing, image enhancement, image analysis and other directions, can solve problems such as unnatural images

Inactive Publication Date: 2019-10-08
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if white balance is applied to the composite image, it may produce an image with unnatural color matching

Method used

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  • Image processing device, drive supporting device, and image processing method
  • Image processing device, drive supporting device, and image processing method
  • Image processing device, drive supporting device, and image processing method

Examples

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no. 1 Embodiment approach

[0018] figure 1 It is a block diagram showing the overall configuration of the driving assistance system 1 according to the first embodiment. Such as figure 1 As shown, the driving assistance system 1 is a system that generates a synthesized image by High Dynamic Range Imaging (HDRI: High Dynamic Range Imaging) and assists the driving of the vehicle. More specifically, the driving assistance system 1 includes a camera 10 , an imaging control device 20 , a driving assistance device 30 , an audio device 40 , a braking device 50 , and a display device 60 .

[0019] The camera 10 is a device capable of acquiring a plurality of images with different exposure sensitivities, and includes first to fourth cameras 100 to 106 . The first camera 100 is, for example, a planar image sensor in which pixels are arranged two-dimensionally, and captures a first image based on a control signal including a first exposure time T1 input from the imaging control device 20 . This image sensor is c...

no. 2 Embodiment approach

[0040] The white balance detection unit 202 of the first embodiment presets the range of detected luminance values, but the white balance detection unit 202b of the present embodiment changes the range of detected luminance values ​​according to the distribution of luminance values ​​of each image. different. Hereinafter, points different from the white balance detection unit 202 according to the first embodiment will be described. The configuration of the image processing device 22 is the same as that of the first embodiment, so description thereof will be omitted.

[0041] Figure 6 It is a conceptual diagram showing a range where white balance processing is performed when two images are combined, and shows outlines on the same line segment in the first image and the second image. The vertical axis represents brightness values, and the horizontal axis represents coordinates arranged on line segments within the image. The contour indicated by "×1" is the contour of the fir...

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Abstract

According to one embodiment, an image processing device includes a detection unit, a white balance processing unit, and an image synthesis unit. The detection unit detects a luminance range for acquiring image information for each of a plurality of images having different exposure sensitivities. The white balance processing unit performs white balance processing on the plurality of images having different exposure sensitivities, based on the image information in the luminance range of each image. The image synthesis unit generates a synthetic image whose exposure sensitivity is adjusted basedon the plurality of images that are subjected to the white balance processing.

Description

[0001] This application claims priority based on Japanese Patent Application No. 2018-52933 (filing date: March 20, 2018), the entire content of which is incorporated herein. technical field [0002] Embodiments of the present invention relate to an image processing device, a driving assistance device, and an image processing method. Background technique [0003] In order to obtain a high dynamic range image which is an image expressing a wide dynamic range, high dynamic range synthesis (HDRI: High Dynamic Range Imaging) is performed to obtain a composite image by combining a plurality of images with different exposure sensitivities. In addition, white balance processing is usually performed on composite images. However, if white balance processing is performed on the synthesized image, an image with unnatural color matching may be generated. Contents of the invention [0004] The present invention provides an image processing device, a driving assistance device, and an i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/73H04N5/235H04N23/76
CPCH04N23/73H04N23/88H04N23/741G06T5/50G06T2207/10144G06T2207/20208G06T2207/20221G06T5/90
Inventor 森达矢
Owner KK TOSHIBA