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Image processing apparatus and control method therefor

一种图像处理装置、图像拍摄的技术，应用在对准多个图像数据或校正多个图像数据的未对准领域，能够解决不能适当地检测运动向量等问题

Inactive Publication Date: 2013-10-23
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the case of using motion vectors detected between images to align an image captured with flash with an image captured without flash, there is a possibility that motion vectors will not be detected properly

Method used

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  • Image processing apparatus and control method therefor
  • Image processing apparatus and control method therefor
  • Image processing apparatus and control method therefor

Examples

Experimental program
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no. 1 example ）

[0025] figure 1 is a block diagram showing an example of a functional configuration by signal processing of a digital camera as one example of the image processing apparatus according to the first embodiment of the present invention. In this embodiment, an image captured when the flash (light emitting device) is fired (image captured with the flash) and an image captured when the flash is not fired (image captured without the flash) are aligned so that they can be combined. In this embodiment, an illuminated area that has been illuminated (increased in luminance due to the influence of the flash) by the flash is detected from an image captured with the flash based on the degree of influence of the flash on the luminance integral value of the image captured without the flash . Note that a strobe lamp refers to an auxiliary light source having a light emission time period from several hundred microseconds to several milliseconds, and is constituted by, for example, a xenon lamp...

no. 2 example ）

[0056]A second embodiment of the present invention is described below. Contrary to the first embodiment, this embodiment also includes a method for determining an illumination area (a block that has been illuminated by a flash) based on the difference between the luminance integral value of an image captured with a flash and that of an image captured without a flash. ) processing. The configuration according to the present embodiment is the same as that according to the first embodiment except for the configuration of the illumination area detection circuit 16 . The description already given in the first embodiment is omitted in this embodiment.

[0057] Figure 6A and Figure 6B is a flowchart of processing executed by the illuminated area detection circuit 16 according to the present embodiment. Figure 6A The processing from step S200 to step S204 in is similar to that described in the first embodiment Figure 2A The processing from step S100 to step S104 in , so the d...

no. 3 example ）

[0063] A third embodiment of the present invention will now be described. In this embodiment, the conditions for calculating the degree of influence of the flash according to the second embodiment are changed. The configuration according to the present embodiment is the same as that according to the first embodiment except for the configuration of the illumination area detection circuit 16 . The description already given in the first embodiment is omitted in this embodiment.

[0064] Figure 7A and Figure 7B is a flowchart of processing executed by the illuminated area detection circuit 16 according to the present embodiment. Figure 7A and Figure 7B The processing of steps S300 to S305 in is similar to that described in the first embodiment Figure 2A The processing of steps S100 to S104 in and described in the second embodiment Figure 6B The processing of step S205 in , so its description will be omitted.

[0065] In the case where the difference between the integr...

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Abstract

An image captured with flash light and an image captured without flash light are each divided into a plurality of regions, and a luminance value is calculated for each region. Based on a ratio of a difference between the luminance value of each region in the image captured with flash light and the luminance value of the corresponding region in the image captured without flash light to the luminance value of the corresponding region in the image captured without flash light, a degree of influence of light representing the influence of light emitted by the light emitting device on the luminance value of each region in the image captured with flash light is calculated. Regions in which the degrees of influence of light are larger than a predetermined threshold are determined as illuminated regions.

Description

technical field [0001] The present invention relates to an image processing device, a control method of the image processing device, and an image capturing device, and particularly relates to a technique for aligning multiple image data or correcting misalignment of multiple image data. Background technique [0002] In recent years, a method of generating a single image by combining images obtained by capturing a scene multiple times has been proposed. The purpose of this method is to expand the dynamic range of a solid-state image sensor, reduce noise, and suppress camera shake, for example, in television cameras, electronic cameras, and the like. [0003] In the case of multiple shots of a scene with a hand-held camera, the multiple images obtained are misaligned due to the effect of camera shake. Therefore, the obtained multiple images are synthesized after correcting the misalignment (alignment). Misalignment can be detected as, for example, motion vectors between imag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235H04N5/232
CPCG06T7/0004G06T7/2013G06T2207/20021G06T2207/10152G06T7/223H04N23/951H04N23/74
Inventor 阿部考博
Owner CANON KK