Focus stack photo fusing method based on image reconstruction

Abstract

The invention discloses a focus stack photo fusing method based on image reconstruction. The focus stack photo fusing method includes acquiring a plurality of focus stack photos same in scenes, focal lengths and apertures but different in field depth of focusing; calculating definition of each pixel in the acquired focus stack photos; continuously fitting definition of the corresponding pixels to obtain the maximum value of the fitted curve as the optimal focusing field depth of this position; calculating the optimal field depth and camera parameter of the pixel in each corresponding position to obtain dispersion degree of this position; deconvoluting the pixel of each corresponding position to obtain pixels after definition is recovered, so as to obtain a fused clear photo. The focus stack photo fusing method can fuse clear photos and can be applied to clear shooting occasions requiring high field depth and quality and large apertures.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a clear photo synthesis technology. Background technique [0002] At present, the density of the photosensitive element of the camera is continuously improved, and the shooting accuracy of the SLR camera is also continuously improved. In actual shooting, especially for some inclined murals or irregular arched murals, it is difficult to make the optical axis completely parallel to the surface to be photographed, which leads to the problem of blurred depth of field. [0003] If you use a small aperture (F8, F11 or even F16), you can get a large depth of field, but the sharpness of the photo is reduced due to the blurring of the entire photo image or the increase in image noise due to diffraction. Or in some scenes that require a larger depth of field, such as shrines, Buddha statues, and buildings with a large depth, using a large aperture can increase the image quality, ...

AI Technical Summary

Problems solved by technology

Using a small aperture can increase the depth of field range of the scene, but every digital camera has an acceptable depth of field range, beyond this range, it will inevitably cause problems such as blurring and serious diffraction phenomena

[0008] In addition, usually for different scenes, the requirements for the depth of field range are different. Of course, the requirements for a certain depth of field range can be achieved by using different digital SLR cameras, but this will undoubtedly cause equipment waste and cost. the rise of

Moreover, the quality of photos taken with small apertures is intolerable for some fields with higher requirements (cultural relics photography, digital modeling)

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