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Image data acquisition method for camera on handheld terminal and handheld terminal

A technology for image data collection and handheld terminals, which is applied in image communication, color TV parts, TV system parts, etc. It can solve the problem of inconsistency in one frame of scrolling images, and achieve rapid recovery and good user experience.

Active Publication Date: 2014-06-11
JLQ TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The purpose of the present invention is to provide a camera image data collection method on a handheld terminal and a handheld terminal, so as to solve the problems of scrolling and inconsistency of a frame of images collected by the terminal camera during image data collection

Method used

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  • Image data acquisition method for camera on handheld terminal and handheld terminal
  • Image data acquisition method for camera on handheld terminal and handheld terminal
  • Image data acquisition method for camera on handheld terminal and handheld terminal

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Embodiment Construction

[0046] The core of the present invention is to control the DMA channel by detecting the frame synchronization signal in the camera controller interrupt source, specifically, by detecting the frame synchronization falling edge (ie vertical synchronous down) interrupt in the camera controller interrupt source Purpose of transmitting boot image data. Those skilled in the art can understand that no matter what data format the CAMERA device module uses, there are generally three synchronous signal outputs: frame synchronous / field synchronous (Vertical / Frame synchronizing signal), horizontal synchronous (Horizontal synchronizing signal) and pixel clock ( pixel clock).

[0047] Among them, the relationship between PCLK (pixel clock signal) and the image data is as follows: the signal is output by the CAMERA device, and this signal is used as the synchronous clock of the output signal of the CAMERA device, and each bit of the image data is output to the on the data bus of CAMERA. Th...

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Abstract

The invention relates to handheld terminals and discloses an image data acquisition method for a camera on a handheld terminal and the handheld terminal. In the method, the characteristic that a frame of complete and effective image data exists between the rising edge (VS_UP) signal of each frame synchronizing signal and the falling edge (VS_DN) signal of the frame synchronizing signal, is utilized. When a frame synchronizing signal is detected, a direct memory access (DMA) way is started to receive data so as to accurately acquire the time point of a frame head and ensure the integrity of an image, so that the phenomena that what is seen is not obtained, such as image shifting, scrolling, such as, can be effectively avoided, and the use feeling when a user uses the camera is obviously improved. Furthermore, the method is independent of hardware and can be flexibly realized through a software manner.

Description

technical field [0001] The invention relates to a hand-held terminal, in particular to a camera image data collection technology on the hand-held terminal. Background technique [0002] As an application device on a current handheld terminal (such as a mobile phone), a camera has been widely used. The image data acquisition of the camera is mainly completed through DMA (direct address access). By using the DMA channel to directly access the address of the internal storage area, the image data collected by the camera is moved from the interface of the external camera device (ie CAMERA device) to the internal storage In the area space, after the image data is moved to the internal storage space, various subsequent processing is performed or directly output to the LCD screen (liquid crystal screen) for display. figure 1 It is a flow block diagram of camera image data collection, the arrow indicates the image data collected by the camera, and its direction represents the flow d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/77H04N5/232H04M1/725H04M1/72439
Inventor 陶然邹桥
Owner JLQ TECH CO LTD