CN110677589B

CN110677589B - Image acquisition device

Info

Publication number: CN110677589B
Application number: CN201911010396.7A
Authority: CN
Inventors: 陈天赠; 吴隆穗
Original assignee: Guangzhou Siwei Electronic Technology Co ltd
Current assignee: Guangzhou Siwei Electronic Technology Co ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2024-05-17
Anticipated expiration: 2039-10-22
Also published as: CN110677589A

Abstract

The invention discloses an image acquisition device, which comprises an image control unit, an image processor and a picture memory, wherein the image control unit is used for controlling the image processor to acquire images; the image control unit and the image processor both read and write the image memory through an SPI bus; the four control pins electrically connected with the image processor and the image memory are respectively provided with a resistor, and the resistors are used for isolating SPI signals of the image processor for reading the image data of the image memory through an SPI bus when the image control unit stops operating the image processor and controls the image memory. According to the teaching of the embodiment, the image memory can be directly controlled by the image control unit, and the image data can be written into the image memory by the image control unit according to different vehicle types, so that the problem that an image acquisition device is suitable for various vehicle types is solved, the error rate of products is reduced, the production cost is reduced, and the stock is reduced.

Description

Image acquisition device

Technical Field

The invention relates to the technical field of image processing, in particular to an image acquisition device.

Background

In the existing image acquisition device, the image processor can only read out the image data of the picture memory, but cannot change the image data of the picture memory. Because the installation positions and angles of the cameras are different in different vehicle types, if different vehicle types are to be supported, the image memory is required to store the image data of the different vehicle types, however, the space of the image memory supported by the image processor is limited, so that the same batch of produced cameras cannot be suitable for all vehicle types. In order to produce cameras of different vehicle types, different picture memories are required to be programmed in the production process, so that the production cost is increased, the warehouse management cost is also long, more funds are needed for stock, and the cameras of certain vehicle types are possibly scrapped due to poor sales.

Disclosure of Invention

The invention aims to solve the technical problem of providing an image acquisition device, wherein a picture memory can be directly controlled by an image control unit, and image data can be written into the picture memory by the image control unit according to different vehicle types, so that the image acquisition device is suitable for various vehicle types, the error rate of products is reduced, the production cost is reduced, and the stock is reduced.

An embodiment of the invention provides an image acquisition device, which comprises an image control unit, an image processor and a picture memory; the image control unit and the image processor both read and write the image memory through an SPI bus;

The four control pins electrically connected with the image processor and the image memory are respectively provided with a resistor, and the resistors are used for isolating SPI signals of the image processor for reading the image data of the image memory through an SPI bus when the image control unit stops operating the image processor and controls the image memory.

Preferably, after the image control unit changes the picture data of the picture memory, the image processor reads the picture data in the picture memory normally by changing all four control pins to a high-resistance state.

Preferably, the image control unit and the image processor may receive an external signal to read and write the picture data of the picture memory.

Preferably, the four control pins electrically connected to the image processor and the image memory are all provided with resistors, and in particular:

The four control pins of the image processor are respectively and electrically connected with one ends of four resistors, and the other ends of the four resistors are respectively and electrically connected with the four control pins of the image memory and the four control pins of the image control unit.

Preferably, each of the four resistors has the same model and value.

Preferably, the device further comprises an image sensor, and the image sensor is electrically connected with the image processor.

The embodiment of the invention has the following beneficial effects:

according to the teaching of the embodiment, the image memory can be directly controlled by the image control unit, and the image data can be written into the image memory by the image control unit according to different vehicle types, so that the problem that an image acquisition device is suitable for various vehicle types is solved, the error rate of products is reduced, the production cost is reduced, and the stock is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an image capturing device according to an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of an image capturing device according to a preferred embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be understood that the step numbers used herein are for convenience of description only and are not limiting as to the order in which the steps are performed.

It is to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The terms "comprises" and "comprising" indicate the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The term "and/or" refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Referring to fig. 1, an embodiment of the present invention provides an image acquisition apparatus, including an image control unit, an image processor, and a picture memory; the image control unit and the image processor both read and write the image memory through an SPI bus;

In a specific embodiment, the image capturing device may be a camera, a video camera, or the like. The image control unit is used for changing the image data on the image memory, so that the conflict problem that the image processor and the image control unit access the image memory at the same time can be solved, the image data can be written into the image memory when the image control unit can operate the image memory, and the problem that one camera is suitable for multiple vehicle types is solved.

Specifically, after the image control unit changes the picture data of the picture memory, the four control pins are changed into a high-resistance state, so that the image processor can read the picture data in the picture memory normally.

The image control unit and the image processor can receive external signals to read and write the picture data of the picture memory.

The image acquisition device adopts an image control unit to receive external signals, updates the image data on the image memory, controls the image processor to read out the image data in the image memory, and superimposes the image data on the image for output. The method mainly solves the problem that an image processor and an image control unit read and write a picture memory through an SPI bus are mutually interfered, and comprises the following steps:

Firstly, the image control unit stops operating the image processor, so that the image processor cannot read data of the image memory through the SPI bus;

The SPI signal is isolated by using a resistor on hardware, when the image control unit controls the image memory, the driving capability of the image processor is not strong by the driving of the image control unit because of the isolation of the resistor, and the signal of the control pin of the image processor can not influence the signal output of the image control unit;

when the image control unit changes the image data of the image memory, the four control pins are changed into a high-resistance state, so that the image processor is not influenced to read the image data in the image memory.

Based on real-time image processing of a Field Programmable Gate Array (FPGA) and a Digital Signal Processor (DSP), the system uses the FPGA as a data buffer and logic control unit (image control unit), and the DSP as an image data processing unit (image processor).

An image processor (hereinafter referred to as a processor) and a picture memory (hereinafter referred to as a memory) in the image capturing apparatus in the present embodiment;

the processor may receive, for example, instructions from other elements (e.g., memory, I/O interface, display, communication interface, etc.) via the bus, interpret the received instructions, and perform operations or data processing corresponding to the interpreted instructions. The Processor may include at least one of a central processing unit (Central Processing Unit, CPU), a graphics Processor mraphics Processing Unit, a GPW, a digital signal Processor (DIGITAL SIGNAL Processor, DSP), and an image signal Processor (IMAGE SIGNAL Processor, ISP), for example CPU, GPU, DSP and ISP.

The memory may store instructions or data received from or generated by the processor or other element (e.g., I/O interface, display, communication interface, etc.). The memory may include, for example, programming modules such as kernels, middleware, application Programming Interfaces (APIs), applications, and so forth. The programming modules may each be configured using software, firmware, hardware, or a combination of two or more of software, firmware, and hardware.

The kernel may control or manage system resources (e.g., buses, processors, or memory, etc.) for performing operations or functions implemented in the remaining programming modules (e.g., middleware, APIs, or applications). In addition, the kernel may provide an interface that allows middleware, APIs, or applications to access and control or manage the various elements of the electronic device.

Middleware may perform intermediation so that an API or application may communicate with the kernel to provide and retrieve data. Further, in association with task requests received from applications, the middleware may perform control of the task requests using, for example, a method of assigning priorities to at least one of the applications that may use system resources (e.g., buses, processors, or memory, etc.) of the electronic device.

An API is an interface that allows an application to control functions provided by a kernel or middleware, and may include at least one interface or function (e.g., instructions) for file control, window control, image processing, or character control, etc.

The image processor is electrically connected with the picture memory, and the four control pins are respectively provided with a resistor, and specifically:

Preferably, each of the four resistors has the same model and value.

Referring to fig. 2, in a preferred embodiment, the apparatus further includes an image sensor electrically connected to the image processor.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims

1. An image acquisition device is characterized by comprising an image control unit, an image processor and a picture memory; the image control unit and the image processor both read and write the image memory through an SPI bus;

The four control pins electrically connected with the image processor and the image memory are respectively provided with a resistor, and the resistors are used for isolating SPI signals of the image processor for reading the image data of the image memory through an SPI bus when the image control unit stops operating the image processor and controls the image memory;

After the image control unit changes the image data of the image memory, the image processor normally reads the image data in the image memory by changing the four control pins into a high-resistance state;

The image control unit and the image processor can receive external signals to read and write the picture data of the picture memory;

the four control pins of the image processor are respectively and electrically connected with one ends of four resistors, and the other ends of the four resistors are respectively and electrically connected with the four control pins of the image memory and the four control pins of the image control unit;

the image acquisition device adopts the image control unit to receive external signals, updates the picture data on the picture memory, and controls the image processor to read out the picture data in the picture memory.

2. The apparatus of claim 1, wherein each of the four resistors has the same model and value.

3. The apparatus of claim 1, further comprising an image sensor electrically connected to the image processor.