CN102198750B - Printing registration implementing method based on digital signal processing (DSP) - Google Patents

Abstract

A printing registration implementing method is characterized by detecting printing units, having one or more colours, of a printer independently and controlling an executing mechanism by using a high-speed digital signal processing (DSP) technology directly. The method is implemented by mainly using registration patterns on printed works, an industrial digital camera with a preprocessing function, a DSP processor, the executing mechanism and the like. The method comprises the following steps that: the industrial digital camera with the preprocessing function extracts the registration patterns from the printed works, converts the registration patterns into digital images, preprocesses the digital images and transmits the digital images to the DSP image processor directly; and the DSP processor transmits a corrected value subjected to high-speed computation to the executing mechanism.

Description

A kind of printing registration implementation method based on DSP

Technical field

The present invention relates to the implementation method of printing registration, especially a kind of directly use DSP high-speed digital video camera technology, to single color or several color printing unit of printing machine, independently detect and the implementation method of actuating mechanism controls.

Background technology

Each printing element of existing printing machine is only responsible for a kind of printing of color.The alignment of shades of colour is very basic, a very important job, usually can bring a large amount of wastes of a large amount of artificial, material and time etc.

The method of existing alignment has: artificial mechanism operation method, by install color mark sensor method, utilize computer to the figure signal extracted compare calibration method.

Artificial mechanism operation wasting time and energy very.

The method of color mark sensor is installed, not too directly perceived and the alignment situation that complete detection is whole can not be accomplished.

Utilize microcomputer to calibrate the figure signal extracted, its problem is: figure signal data volume is huge, coffret data-handling capacity is limited, transmission data be easily interfered, also very limited to the disposal ability of data type schema under the operating system platforms such as WINDOWS.

Summary of the invention

The object of this invention is to provide a kind of efficiently simple and direct automatic printing alignment implementation method.

Technical scheme of the present invention: be made up of the industrial digital camera, dsp processor, executing agency etc. of the registered graphic on printed matter, band preprocessing function.The figure having the registered graphic on printed matter that industrial digital camera will extract, directly pass to dsp processor after pretreatment, the corrected value obtained after supercomputing is passed to executing agency by dsp processor; Above process can circulate repeatedly, to reach requirement.The industrial digital camera of so-called band preprocessing function refers to: can carry out white balance to the image gathered, can set, direct output digital image, use CCD or the CMOS sensitive chip of lining by line scan of band global shutter to image gain.

Beneficial effect: system architecture is simple and direct, reliability is high, the little unobstructive of device volume, instantaneous error-detecting and the correction completing both direction in length and breadth.

Accompanying drawing explanation

1, figure mono-embodiment one principle of compositionality block diagram

2, figure bis-embodiment two principle of compositionality block diagram

3, figure tri-embodiment three principle of compositionality block diagram

Detailed description of the invention

Embodiment one

As shown in figure, every 1 ~ n printing element (except first unit) installs the industrial digital camera of a band preprocessing function, dsp processor, 1 ~ n platform executing agency.A dsp processor controls 1 ~ n executing agency.Without communication connection between each dsp processor.

Embodiment two

As shown in Figure 2, each printing element (except first unit) installs industrial digital camera, an executing agency of a band preprocessing function, every n platform (n > 1) camera connects a dsp processor, a dsp processor control n platform executing agency.Without communication connection between each dsp processor.

Embodiment three

As shown in Figure 3, every 1 ~ n printing element (except first unit) installs the industrial digital camera of a band preprocessing function, dsp processor, 1 ~ n platform executing agency, a centralized watch unit.A dsp processor controls 1 ~ n executing agency.Each DSP is connected with centralized watch unit by communication bus, is shown the state of each printing element by centralized watch unit.

Claims (1)

1. an implementation method for printing registration, is characterized in that:

By the registered graphic on printed matter, with the industrial digital camera of preprocessing function, dsp processor, the compositions such as executing agency, the figure having the registered graphic on printed matter that industrial digital camera will extract, directly pass to dsp processor after pretreatment, the corrected value obtained after supercomputing is passed to executing agency by dsp processor, above process can circulate repeatedly, to reach system requirements, the industrial digital camera of so-called preprocessing function refers to: can carry out white balance to the image gathered, can set image gain, direct output digital image, the sensitive chip using band global shutter and line by line scan, wherein:

Except first module, every 1 ~ n printing element installs the industrial digital camera of a band preprocessing function, dsp processor, 1 ~ n platform executing agency, and a dsp processor controls 1 ~ n executing agency, without communication connection between each dsp processor;

Or

Except first module, each printing element installs industrial digital camera, an executing agency of a band preprocessing function, every n platform camera connects a dsp processor, wherein, n > 1, a dsp processor control n platform executing agency, without communication connection between each dsp processor;

Or

Except first module, every 1 ~ n printing element installs the industrial digital camera of a band preprocessing function, dsp processor, 1 ~ n platform executing agency, a centralized watch unit, a dsp processor controls 1 ~ n executing agency, each DSP is connected with centralized watch unit by communication bus, is shown the state of each printing element by centralized watch unit.