Stacking method and system of video image with adjustable transparence based on OMAP chip

Abstract

The invention discloses a stacking method and system of a video image with adjustable transparency based on an OMAP chip. The system comprises a user operation module, an acquisition module, a storage module, an ARM control module, a DSP operation module and a display module. A user selects a picture wanting to be stacked to display and a transparency value thereof through an interaction interface of the user operation module, preprocesses an OSD (on-screen-display) picture, and then writes in a cache zone of the storage module; the OMAP chip ARM control module and acquisition module acquire real-time video data in a specific format; the OMAP chip DSP operation module perform pixel-level weighted computation on the real-time video data and the picture data according to a set transparency value; and the display module display a final stacking fusion effect through an LCD screen. An operation of stacking the transparent OSD on the real-time video is independent of the complexity of the picture selected by the user, the real-time modification of the mixed transparence is supported, and the flexibility and the convenience of the OSD are improved.

Description

technical field [0001] The invention belongs to the technical field of digital video image processing and display, and relates to an OSD (On Screen Display, on-screen display) implementation method and system. Background technique [0002] In the application of multimedia digital image processing technology, the video detection system is often the focus of attention. There are two commonly used video image overlay methods: [0003] 1) Stacking using stacking chips [0004] 2) Use a counter to count pixels for overlay [0005] These two methods are only suitable for superimposing simple characters, and it is difficult to support complex graphics, so the amount of information contained in OSD is small. Moreover, the characters will completely cover the information of the original video image when the image is superimposed, and it does not support the adjustment of transparency, and cannot adapt to the change of the video superposition fusion scene. In addition, these two m...

AI Technical Summary

Problems solved by technology

[0008] The present invention provides a video image overlay method and system based on an OMAP chip with adjustable transparency, aiming to solve the problems of poor editing flexibility and high development cost of the existing OSD implementation method, which includes the following:

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