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Image processing device, image capture device, image processing method, and program

An image processing device and original image technology, which is applied in the directions of image data processing, image enhancement, image analysis, etc., can solve problems such as the increase in the data volume of the restoration filter and the huge storage capacity of the restoration filter

Active Publication Date: 2016-03-30
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The more types of conditional elements of the restoration filter, the more precise point image restoration processing can be performed, but the data volume of the restoration filter increases, and the memory capacity required to store the restoration filter becomes large.

Method used

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  • Image processing device, image capture device, image processing method, and program
  • Image processing device, image capture device, image processing method, and program
  • Image processing device, image capture device, image processing method, and program

Examples

Experimental program
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Effect test

no. 1 Embodiment approach ＞

[0146] Figure 10 This is a flowchart showing the point image restoration process according to the first embodiment. The restoration filter used in the point image restoration process of the present embodiment is changed according to the aperture value, but is common to the zoom magnification of the optical zoom. In addition, whether it is a moving image or a static image, Figure 10 The point image restoration processing flow shown can be applied to all images, and when applied to a moving image, the processing is performed for each image (frame) constituting the moving image.

[0147] First, imaging condition data is acquired by the point image restoration control processing unit 39 . More specifically, the aperture value ( Figure 10 S10), and obtain the zoom magnification of the optical zoom (S11). The method of acquiring these photographing condition data is not particularly limited. For example, when photographing condition data (Exif, etc.) is added to the original ...

no. 2 Embodiment approach ＞

[0152] In this embodiment, the method of determining the restoration filter and restoration gain is switched according to whether the aperture value at the time of capturing and acquiring the original image data is "small aperture". That is, when the aperture value of the optical system (aperture 17 ) at the time of acquiring the original image data is a value on the small aperture side smaller than the threshold value (first aperture value), the filter application unit 41 uses the zoom magnification for the optical zoom of the optical system. A common filter is used as a restoration filter to acquire restoration image data, and the gain adjustment unit 42 determines restoration gain (magnification ratio) according to the zoom magnification of the optical zoom of the optical system.

[0153] Figure 11 It is a flowchart showing the point image restoration process according to the second embodiment. In this embodiment, the same as the first embodiment described above (refer to...

no. 3 Embodiment approach ＞

[0159] In point image restoration processing for "still images", the main emphasis is on improving the image quality of a single image (still image), while in point image restoration processing for "moving images", it is not only necessary to improve the image quality of each frame, but also High-speed processing is achieved by maintaining the continuity in image quality between the previous and subsequent frames and simplifying the processing itself. In particular, when the optical zoom magnification is continuously changed during video shooting, the point spread function also changes with the change in the optical zoom magnification. Therefore, even when the optical zoom magnification changes during moving image shooting, it is preferable to perform point image restoration processing that can provide a smooth moving image without hindering the continuity between frames.

[0160]In the present embodiment, it is determined whether the original image data to be processed is a “...

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Abstract

The present invention provides an image processing device, image capture device, image processing method, and program relating to a point image restoration processing technique which can be executed with a streamlined processing configuration while minimizing restoration filter data volume. Restored image data is acquired by applying a restoration filter based on a point spread function of an optical assembly upon raw image data which is acquired by photography using the optical assembly (S13: filter application step). A gain adjustment is carried out on the difference between the raw image data and the restored image data, and recovered image data is acquired from the adjusted difference and the raw image data (S15: gain adjustment step). In the filter adjustment step, a common filter which is determined regardless of the value of the optical zoom magnification of the optical assembly is used as the restoration filter, and in the gain adjustment step, the gain is determined on the basis of the optical zoom magnification of the optical assembly.

Description

technical field [0001] The present invention relates to an image processing device, an imaging device, an image processing method, and a program related to restoration processing based on a point spread function. Background technique [0002] In a subject image captured via an optical system, due to the influence of diffraction, aberration, and the like caused by the optical system, a point-spreading phenomenon in which a point subject has minute diffusion may occur. A function representing the response of an optical system to a point light source is called a point spread function (PSF: PointSpreadFunction), and is known as a parameter representing the degradation of the resolution of a captured image. [0003] A captured image whose image quality has been degraded due to this point-spreading phenomenon can be restored in image quality by undergoing point image restoration processing based on PSF. The point image restoration process is a process in which deterioration chara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232G06T5/20H04N5/225H04N5/228H04N5/238H04N5/243
CPCG06T2207/20192H04N23/631H04N23/698H04N23/69H04N23/75H04N23/76H04N25/6153H04N23/843G06T5/73
Inventor 入江公祐杉本雅彦成濑洋介林健吉
Owner FUJIFILM CORP
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