Image processing device, image processing method, and image capturing device

Abstract

The present invention provides an image processing device for correcting aberrations caused by a capturing lens for an image signal to which light passing through the capturing lens is electrically converted. The image processing device includes a correction vector calculation unit for calculating a correction vector in accordance with coordinates of each pixel of each color component contained in the image signal on the basis of at least data on chromatic aberration and distortion aberration caused by the capturing lens; a conversion ratio calculation unit for receiving at least the image signal, capturing conditions, and the correction vector, and for calculating a conversion ratio for scaling the color component in accordance with the coordinates of the pixel; and a resolution conversion unit for scaling the color component in accordance with the coordinates of the pixel on the basis of the conversion ratio.

Description

technical field [0001] The present invention relates to an image processing apparatus, an image processing method, and an image capturing apparatus that correct aberrations caused by a capturing lens in an image captured with the capturing lens. In particular, the present invention relates to an image processing device, an image processing method, and an image capturing device capable of synchronously correcting chromatic aberration and distortion aberration caused by a capturing lens. Background technique [0002] Video cameras or digital still cameras have been rapidly miniaturized in recent years, and their capture lenses have also been miniaturized. The miniaturization of the capture lens increases the aberration caused by the lens, and thus it is difficult to sufficiently suppress the reduction in the quality of the captured image. In particular, as Figure 6 As shown, since the red, green, and blue components of each wavelength have different refractive indices when p...

AI Technical Summary

Problems solved by technology

However, this correction requires a large amount of reproduction from and recording to the image memory, and thus the entire process takes a long time, including the time required to access the image memory

As a result, it is difficult to achieve high-speed correction processing

[0005] Especially when the correction in the horizontal direction and the correction in the vertical direction cannot be performed at the same time, the processing time is further increased, and thus it is more difficult to realize high-speed processing

This results in reduced performance of products such as digital cameras with long periods of time between successive image captures

[0006] Moreover, the long processing time results in an increase in the overall energy consumption, including the processing of accessing the image memory

This also leads to reduced product performance, such as very short battery life

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