Image sharpening method and device

Abstract

The invention provides an image sharpening method and device. The method comprises the following steps of: performing two-dimensional filtering on the original image; acquiring high-frequency partial data in the original image; storing the high-frequency partial data in an online cache; determining an interpolation factor for performing interpolation processing on the original image according to a zooming factor of the original image; performing the interpolation processing on the original image, so as to obtain an interpolation image; performing the interpolation processing on the obtained high-frequency partial data; acquiring interpolated high-frequency data; and superposing the interpolated high-frequency data into the interpolation image. The image sharpening device is a device for sharpening the image by employing the method. The production cost of the image sharpening device can be reduced, the image sharpening processing with any interpolation time is realized under the condition that the production cost of the image sharpening device is not increased, and the performance of the image sharpening device is improved.

Description

technical field [0001] The present invention relates to the field of image processing of electronic equipment, in particular to a method and device for electronic equipment to sharpen images. Background technique [0002] Existing electronic devices, such as computers, mobile phones, e-book readers, etc., can display or play images, videos, etc. Since the resolution of the original image or video stored in the electronic device is inconsistent with the resolution actually displayed by the electronic device, the electronic device often needs to scale the original image or video to meet the requirements of different display resolutions. [0003] see figure 1 , the existing image scaling device generally includes a vertical scaling unit 12 and a horizontal scaling unit 13, which respectively perform vertical scaling processing and horizontal scaling processing on the image. Since the image scaling device reads the original image data from the external data memory, in order to...

AI Technical Summary

Problems solved by technology

This will increase the production cost of the image sharpening device, especially in single-chip systems

On the other hand, when the number of rows of the online buffer 33 is constant, the ability of the image sharpening device to sharpen the image is bound to be limited, which reduces the performance of the image sharpening device and results in an unsatisfactory image sharpening effect.

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