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

An image processing device and image technology, applied in image data processing, image enhancement, image analysis, etc., can solve the problems of noise component enhancement, restoration of image ringing, etc.

Active Publication Date: 2016-11-16
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason for this is that if an image restoration filter produced by using the complete inverse of the optical transfer function is used, the noise component will be greatly enhanced while restoring the degraded image, and if the noise cannot be tolerated for the desired image quality , in the restored image, defects such as ringing as artifacts occur, and further, if the degree of restoration in each color component of red (R), green (G), and blue (B) is different from the expected one, the restoration Coloring (false coloring) occurs in the image

Method used

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

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no. 1 Embodiment approach ＞

[0109] The sharpening restoration control unit 37 according to the present embodiment adjusts the restoration rate in point image restoration processing.

[0110] Figure 4 It is a figure which shows the structure of the processing block which performs the point image restoration process concerning 1st Embodiment.

[0111] The restoration processing unit 38 includes a point image restoration filter processing unit 42 , a restoration multiplier 43 and a restoration adder 44 . The point image restoration filter processing unit 42 applies a restoration filter corresponding to the point spread function of the optical system (the lens 16 and the like) to the input image data.

[0112] The restoration multiplier 43 multiplies the image data obtained by the point image restoration filter processing unit 42 by the restoration strength magnification U, and performs gain control. The restoration adder 44 multiplies the input image data by a magnification (1-U), and adds the image data...

no. 2 Embodiment approach

[0205] Figure 20 means to replace image 3 A block diagram of a configuration example of the image processing unit 35 - 2 of the second embodiment of the image processing unit 35 shown in .

[0206] The image processing unit 35-2 includes a sharpening restoration control unit 37-2, a restoration processing unit 38, and an edge enhancement processing unit 39 functioning as a sharpening processing unit not based on a point spread function. In addition, the restoration processing unit 38 and image 3 The restoration processing unit 38 of the image processing unit 35 shown in fig.

[0207] The edge enhancement processing unit 39 performs sharpening processing on the image data using a sharpening filter not based on a point spread function. The sharpening filter is not particularly limited unless it directly reflects the point spread function, and a known edge enhancement filter can be used as the sharpening filter. In addition, regarding the sharpening filter, a single filter...

no. 3 Embodiment approach ＞

[0260] Figure 23 It is a diagram showing the configuration of a processing module that performs point image restoration processing and sharpening processing according to the third embodiment. Also, for Figure 22 The same structures as in the second embodiment shown above are given the same reference numerals, and detailed description thereof will be omitted.

[0261] The unsharp restoration control unit 37-3 according to the third embodiment obtains the sharpening ratio in the sharpening processing, and calculates the "restoration ratio" in the point image restoration processing from the total unsharp restoration ratio and the sharpening ratio.

[0262] The sharpening rate (sharpening intensity magnification V) is input to the sharpening restoration control unit 37-3 (the automatic intensity adjustment unit 52-3). The sharpening intensity magnification V input to this automatic intensity adjustment unit 52 - 3 is specified by the user in advance before performing image pro...

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Abstract

Provided are an image processing device, photography device, image processing method, and image processing program capable of effectively restoring, in a focus region and sub-focus region, image degradation resulting from the point spread function (PSF) of an optical system. The image processing device acquires restoration image data by carrying out, on original image data acquired through subject image photography using the optical system, restoration processing using a restoration filter based on the PSF of the optical system. This device has a restoration processing unit (38) for carrying out restoration processing by applying the restoration filter to the original image data, a sub-focus region detection unit (50) for detecting the sub-focus region in the original image corresponding to the original image data, and a sharpness recovery control unit (37). The sharpness recovery control unit carries out adjustment so that the restoration intensity magnification (U) for the original image data of the detected sub-focus region is at least smaller than the restoration intensity magnification (U) for the original image data of the focus region.

Description

technical field [0001] The present invention relates to an image processing device, an imaging device, an image processing method and an image processing program, and in particular to a method for adjusting restoration strength or restoration strength and sharpening strength corresponding to focusing conditions. Background technique [0002] In a subject image captured by an optical system, due to the influence of diffraction or aberration caused by the optical system, a point spread phenomenon in which a point subject has slight spread is sometimes observed. A function representing a response to a point light source of an optical system is called a point spread function (PSF: Point Spread Function), and is known as a parameter that affects resolution degradation (blurring) of photographed images. [0003] It is possible to restore the image quality of a photographed image whose image quality has deteriorated due to the dot spread phenomenon by performing point image restora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232G06T5/00G06T5/20H04N1/409
CPCG06T5/20G06T2207/20012H04N23/80G06T5/73H04N23/951H04N23/959G06T2207/10004
Inventor 入江公祐成濑洋介林健吉
Owner FUJIFILM CORP