DE2609648A1 - DEVICE FOR DIGITAL CAPTURING AND / OR STORAGE OF ANALOGUE INFORMATION, SUCH AS DOTS, LINES OR ANY OTHER GRAPHICAL IMAGES, ON A LEVEL TEMPLATE - Google Patents

Description

Device for digital hr ± asr.ung uru./or storage from on a level Vorlvjfc beiindlicricn anolo-jcr. Iniormatioiien vjie dots, lines or any other graphic structures

The invention relates to a device for digital recording of data from a flat template such as points, lines or other similar graphic structures. v.-o;) ci those reflected by dti in the Au ₁ .- or D \ irchlichtveri: their illuminated original bsw. Serve pasrierciide Licl: tri'jn: jIe via an O: tik 'Ui a Fotorensorzcilc in Ilen, not bev.e any other .-. Xiinaiiitieti: ch ocer be \ / cglic> ic.r uirijhr.eor toelektronik for scanning eggs Template iii discrete picture elements.

LO If graphic structures of the processing in an EDP system are to be made superfluous, the analogue informa tions of a south, a guild and a left. under use

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of electronic recording devices such as scanning pens, Vidicons, photo lines, etc. directly into digital signals to convert. These digital signals can be processed immediately or stored on a magnetic tape or similar will.

The development of very small and effective photo sensor lines makes it possible to reproduce such analogue templates to be digitized Record type of a pixel grid and the optical information resulting from the analog graphic information to convert them into electrical signals. For this purpose, the original is generally illuminated by a light source or, in the case of a transparent original, illuminated from behind, the reflected light or the light passing through the original falls on a line of photosensors via optics, cf.

DT-OS 2 455 973.

Known photosensor lines contain 500 or more diode cells in a line of, for example, 12.5 mm in length and therefore enable a high resolution. (Such photosensor lines are, for example, from Fairchild Seniiconducteur Corporation of van Nies, Calif., USA).

Since a reconstruction or processing of the template is only possible from the ordered and appropriately identified point set, i.e. only the position assignment of each pixel within the analog template adequately characterizes the digital signal, it is crucial for the functionality of such devices that 1 to each registering image point a unique, the geometric location of the point on the template unmistakably characterizing digital information is entered into the EDP system or the data carrier system. In the case of planar geometric shapes

omit in print

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this is usually done by adding the coordinates digitized in X and Y directions together with the associated point of light and recorded on a magnetic tape and the like.

From DT-AS 2 357 569 it is known that such a template with a manually guided, electrical scanning gritfel is scanned and that the removal of the stylus tip of Electrical conductors laid in the feed table in the X and Y directions as an electrical signal, which is an unambiguous Information about the geometric location where the

Stylus tip is located, supplies, to the storage device. to be led.

The use of highly integrated semiconductor photosensor lines to query the graphic information of a template makes it possible to store analog data carriers that contain a large amount of graphic information, such as contour maps, To digitize work drawings of all kinds etc. with great precision and under tolerable time limits and thus in an economical way of an IT system for processing to make deliverable. The time required to digitize a contour line map on a scale of 1: 5000 is about 200 to 400 hours if the stylus method is used, but only a fraction of that time if automatic optoelectronic devices are used.

If the scanning pen to be operated by a surgeon is omitted as a recording element in the interest of an economical and more precise method in favor of automatic optoelectronic methods, the method described in DT-AS 2 357 569 for determining the geometric location of graphic information cannot be used.

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The invention is based on the object of creating a device of the type mentioned at the outset which allows There are also some ways in which the coordinates are graphically Information at the same time as deir. associated, the Imorrr.ation cerstt! lender. To digitize the light signal to the thereby generated digital information of a storage device or to be supplied to a kechon system.

This object is achieved according to the invention in that a Y-input pulse encoder rr.iL ciritr Y-prescrew device - .: of the acceptance

"0 tiscriGS or aor Aufnahnoo; toc-li-ktroiilk jOko ;;>" lt i: L, which "ibc.r a Y-pulse counter a jt - irtir-.t.uls χ" ir ale serial blanking of an iOtoBonsor line lying in X-direction mi ceren.-uir tt-uerun-jrelektronik emits uno at the same time the Y-pulse counter counts up, about 5 as well as the output of the Y-

Ib I: ip-ulr.i'.illilori; .: l5 auc !. 'Aec emanated eir.es the analogue signals of a j ecen Biiupunktes ι OLOicr ^ oi-L.cilo In eit, clgitales iiort wc-.riaeluden Ani-.loj-Liijital-W.iridlerr; are connected to the inputs of a multiplexer, at its output the digital image point signals and the associated Y-coordinate data of the image lines are removable, and that the X-coordinates of the individual image points within a line by their current intersection from the Y-coordinate. iiiü te bes timi-ibcir l.xhC.

For wider templates the scanning of the original ranges with only one stiffeners Aessen width aer Bilczeiienlänge corresponds 5 speaks of nici.t. In order to be able to record a wider original in several strips without any additional stripes, the auxiliary recording compartment or the recording optoelectronic can also be adjusted in the X-direction. In order to obtain an unambiguous coordinate assignment in the X direction, a further embodiment of the invention provides that with a

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Feed device of the receiving table or the receiving optoelectronic a pulse generator is coupled in the X-direction, which is one of the ongoing with each starting strip equipment Number of the strip corresponding digital count word in generated by an X-strip counter, which is also at the output of the multiplexer is removable.

Another embodiment of the invention provides that between multiplexer and magnetic tape recorder / processing system an adaptation to the recording speed of the magnetic Ό tape or other removable storage device that serves as a data carrier is switched on.

Basically, it is sufficient to just mark the scattering individually in the X-direction. According to the principle, however also every image line with the Y coordinate and the X strip number be marked. This leaves the image line format constant for the entire scan.

The advantages that can be achieved with the invention are to be seen in the fact that surfaces of any size can only be achieved by changing them the length of the stripes and the number of stripes with ε-tets more constant Caster resolution and with automatic coordinate assignment all raster pixels can be detected in a very short time.

The following is based on the embodiment shown in the figures the structure of the device according to the invention explained in more detail. Ls show:

FIG. 1 the opto-mechanical structure; Figure 2 is a block diagram of the electronics;

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Figure 3 shows an example of the recording of the digitized Signals and their identification on a magnetic tape;

FIG. 4 shows an example of a blanking pattern for an original.

Figure 1 shows the opto-mechanical structure of a device of the type according to the invention. An example is shown with a photo sensor line 9 movable in the X and Y directions and associated optics .0.

The advance of the pick-up table .3 or the pick-up optoelek-.0 tronik 9, 'O _1, whereby it makes no difference for the invention which of the two organs is designed to be movable, takes place in the example via spindles 2 and 6. Guideways serve axes 7,8. The spindles are rotated by motors 1 and 4 directly or via gears and controlled by pulse generators 3 and 5.

A template 12 of any graphic type, such as a contour map, Work drawing etc. is stretched on a recording table? 3. Of light sources 11 or 14, which are both are arranged behind and in front of the recording table the original is illuminated. In the case of transparent originals, the transmitted light method is used, so that the behind the original The light source 14 located is switched on, while the incident light 11 is used for other originals.

Those reflected by the original 12 or those passing through Light signals fall via optics 10 onto a line of photosensors 9. Typically, this optoelectronic is designed in such a way that that a template strip of approx. 50 mm length optically reduced to the length of the photosensor line 9 of approx. 12.5 mm will. A photo sensor line commonly available today consists of

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500 separate Linzel cells with an extension of about 25 u χ 21 u, each sensor cable consequently detects in; Exemplary embodiment a proposal 1 Liehe vo: i 0.1 χ C, ' n \ v. \.

Of course, the electronics can also be designed in this way that a: 'ic.-ihc: \ - or lock circuit off In principle, any number of photo sensor lines 9 with a correspondingly designed ontic 10 is used.

The photo sensor line 9 is triggered, but a serious control system 19 and an electronic control system 7, Figure 2 shows the block diagram for the device according to FIG Number of photo cells in a photo sensor line 9 and the size of which corresponds to the brightness of the supervising pixel. Lin image signal repeater ".5 is the gain of the blanked from cer photo sensor line 9 video signals, 'Burch a holding and memory circuit"; 6 v / ground these signal values such as for the duration of a pixel period to a constant level gehaltein, so that it comprises a during this time ^of ivanalog-Diqital-VJandler 13 can be digitized into, for example, O-bit words. A B-bit Vort is therefore produced for each pixel, which is sent in parallel via a multiplexer 23 to a fast alternating buffer 24, 25. While i'.D. If the buffer store 24 stores the bit stream for a certain time, the buffer store 25 emits its signals at the speed adapted to a magnetic tape 26. The alternately switched intermediate stores 24, 25 are therefore used to adapt the photosensor blanking to the recording speed of the magnetic tape 26.

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After the device has been switched on manually is via the central control / regulation 13 by one Y pulse counter 20 is the start pulse for the readout an image line via the central control / regulation 19 the control electronics 17 given and thus the serial Photosensor line blanking started. The serial pixel blanking rate for the photosensor line 9 is independent of the line frequency which is dependent on the Y travel speed. It must be dimensioned so that before the new line start the reading of a line is finished. The pulse generator 5 acts on the! '- pulse counter 20 and thus assigns each line their Y coordinate too. A special X-coordinate designation of each pixel within a line is unnecessary, since this X coordinate is divided by the current pixel numbers results automatically within a line and is allocated the storage space accordingly in the computer.

The Y-pulse counter 20 can be queried so that after each blanked line a digital word marking the coordinate is communicated to the data carrier or that after several, for example four lines, which then form a block, a signal corresponding to the data carrier is communicated .

For the scanning of an original in several strips is provided, that a second guide and drive system in the manner of the first system, the receiving table 13 or the receiving optoelectronics 9.10 keeps movable in the X direction. At the end of each strip, the tape record is replaced by the manually in the central control / regulation 19 preprogrammed strip length automatically stopped and at high speed The start of the strip is approached in the Y direction. At the same time, the rivet table and the optoelectronics are also installed

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triggered by the central control / regulation 19 moved in the X direction by the width of the scanned strip, for example 50 mm. The scanning of the second and each further strip in the same direction as the first strip is carried out in exactly the same way. By adding a pulse generator 3 on the X-axis, an X-strip counter 71 is increased by a pulse un Lins before each new strip is blanked and this number is registered via the multiplexer, so that a clear assignment in the X-coordinate is possible. An identifier can also be given via the multiplexer by means of a code number setting 22 on the magnetic tape for identifying the original. From the end of the image strips preprogrammed manually in the central control / regulation 19 , the scanning device always automatically returns to the starting point in the Y direction, while in the X direction there is an offset by the width r.

The digitized video signals have accordingly Blackening of the image points a certain size, which in the example comprises a maximum of 256 levels (<3 bit). The saved Signal therefore contains the entire blackening range of the Template. By adding a threshold value in the computer (not shown here), in the case of recording and evaluation black and white drawings arbitrarily define what should be black and what should be white.

For the inclusion of colored originals filters can be used in the optical beam path, each only let through a spectral range. Color templates must therefore be matched with the corresponding color for each desired color Filter a special blanking can be made.

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FIG. 3 shows an example of a recording on a magnetic tape in which four lines are combined to form a block and are identified together. Each piece of information is represented and recorded in an 8-bit word. The capital letters A to J identify the individual magnetic tape tracks. A data block comprises from top to bottom the identifier k of the template, the serial number L of the strip to be scanned, the block number M _1, where a block consists of four lines each, then the first 500 image points of the first line, then the next 500 image points the second line, then the next 500 pixels of the second line and so on up to and including the fourth line. Before each new block M, the data for identification, strip number and block number are recorded again, so that an unmistakable assignment is recorded on the magnetic tape.

FIG. 4 shows an example of a grid with which the template is covered. Recording optics 10 and photo sensor line 9 and Y pulse generators 5 are matched to one another in such a way that an image dot grid size of 0.1 mm is generated. As already described, the original is scanned in strips of 500mm width. This means that, for example, a template of the size 0.5 χ 0.5 m with a grid of approx. 25 χ 10 individual image points is covered.

If all lines of a strip S 1 have been blanked, the next strip S 2 is approached, as described, and the pulse generator a corresponding one on the drive spindle for the X feed Impulse for the identification of the serial number of the new strip is generated and registered, etc. up to strips S 10.

Claims: 709837/0196 '

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Claims (4)

Claims Device for digital acquisition run-j and / or storage from analog information such as points, lines or other arbitrary information on a flat template graphic structures, with those of the incident or transmitted light method Reflect illuminated original or these passing light signals via an optical system onto a Photo sensor line fall, with a, movable recording— table or movable recording optoelectronics for the scanning of the original in discrete picture elements, thereby marked cufi a Y-pulse generator (5) with a Y-feed device (C ₁ H ) of the Aufnahrr.etisdEs (! 3) or the Aufnahn.eoptoelektronik (9, "O) is coupled, which via a Y-impulse counter (20) a srtimpuls for the serial blanking of a The rotosensor line (9) lying in the X-direction sends it to its control electronics ('7) and at the same time selects the Y-Ir each pixel of the photosensor line (9) in a digital 'word converting analog-to-digital converter (Ib) are connected to the inputs of a multiplexer (23), at the output of which the digital pixel signals and the associated Y coordinates of the image lines can be removed, and that the X coordinates of the individual pixels within a line can be determined from the Y coordinate by their current point number. -12- 709837/0198 ORIGINAL INSPECTED 2. Apparatus according to claim 1, characterized in that with a feed device (, 2) of the receiving table (".3) or the receiving optoelectronics (9, 'O) in the X direction, a pulse generator (3) is coupled, which begins with each ! Streif er.austastung a digital counting word corresponding to the serial number of the strip is generated in an X-strip counter (21), which can also be taken from the output of the multiplexer (23). 3. Device according to one of claims 1 to 3, characterized in that daf3 between the multiplexer (23) and magnetic tape recorder / processing system (26) to adapt to the recording speed of a Magnetic tape / data carrier serving removable storage (24, 25) is connected. 4. Apparatus according to claim 1 or 2, characterized in that each image line is simultaneous marked with the Y coordinate and the X strip number. 709837/0196