Image rotation method and device for dot matrix display device

Abstract

The invention relates to the field of image processing and display and provides an image rotation method and device for dot matrix display equipment. According to the method, the pixel value of an original image is fully utilized in the process of rotating the image and corresponds to the pixels of the rotated image one to one, the image integrity is ensured, and the problem that the operational efficiency is low because of interpolation operation and multiplication is eliminated; and meanwhile, the rapid algorithm is combined with the image storage mechanism and then is applied to the real-time display process of the video image, which is suitable for hardware implementation. Therefore, according to the technical scheme, the image rotation method used for dot matrix display equipment comprises the following steps: decomposing the image rotation process into three steps, translating the horizontal coordinates of partial pixels for integer units after the first transform, translating the vertical coordinates of the partial pixels for integer units after the second transform, and translating the horizontal coordinates of the partial pixels for integer units after the third transform. The method is mainly applied to image processing.

Description

technical field [0001] The invention relates to the field of image processing and display, in particular to the realization of a fast image rotation algorithm, the storage of data and the image display of a dot matrix device, in particular to an image rotation method and device for a dot matrix display device. technical background [0002] Dot-matrix display devices can be used to display information such as numbers, characters and images, and are widely used in industrial and commercial fields. The image resolution displayed by a dot matrix display device is affected by the number of dot matrix and the arrangement of dot matrix. Each display unit in a common dot matrix display device is arranged horizontally and vertically in rows and columns. When the image is rotated, the original smooth horizontal line will appear blurred and jagged due to the inherent way of dot matrix display, which will affect the image quality. clarity. [0003] The rotation of digital image is an ...

AI Technical Summary

Problems solved by technology

[0015] In order to overcome the deficiencies of the prior art, the present invention aims to propose an image rotation method and device for dot-matrix display devices. In the process of realizing image rotation, the pixel values ​​of the original image are fully utilized and compared with the rotated image The one-to-one correspondence between the pixels ensures the integrity of the image and eliminates the problem of low operational efficiency caused by interpolation and multiplication operations. At the same time, this fast algorithm is combined with the image storage mechanism and applied to the real-time display of video images. The process is suitable for hardware implementation. For this reason, the technical solution adopted in the present invention is that the image rotation method for the dot matrix display device includes the following steps: the rotation process of the image is decomposed into three steps, and the formula used for the image rotation transformation is:

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