DE1806559C - Method for quantizing a character or image pattern, preferably for the purpose of obtaining control data for the electronic phototypesetting - Google Patents

Description

of the two inputs of one of the registration devices is above all the fact that there is an unnecessarily large amount of kerning Upstream gate circuit is supplied to memory cells are occupied. These disadvantages are the, which is designed so that it is blocked, 40 all the more serious if it is, for example when the surrounding area is scanned, the accompanying stripes are characters that are set many times larger ^ ß- should be used as the characters of the rest of the text

4. The method according to claims 1 to 3, there- fore as it is considered for newspaper headlines characterized by that between the beginning and comes. Because these uppercase characters are opposite End of the accompanying strip and a less pronounced reduction across the 45 original touching the contour of the characters than the other characters, so are the Kontuchens or image pattern if a gap is observed, the errors in them will be particularly noticeable, which are at least roughly equal to the dimension. Also the additional use of of the environment in the scanning direction. Core memory cells are particularly troublesome here. Around

50 namely characters in these many larger ones To be able to record font sizes blackened in a contiguous manner, db character template, always for reasons of economy

T- _f .j has the same size, in several times finer resolution

The invention relates to a method of being sampled, i.e., that of counting to quantization of a character or image pattern, basic small unit several times smaller must choose preferably for the purpose of obtaining tax. For templates with grid lines, beer data for electronic phototypesetting. this indicates that the originally as a small stone

The presupposed method consists essentially of counted grid meshes instead of two small ones, then one with a grid line network - 60 or more small units are counted. In this case, each grid mesh is also scanned in several columns or lines in relation to its size to be set in relation to its size to be set. Due to this greatly enlarged image, point by point and finer resolution, a multiple of core memory cells is already scanned line by line or column by column, and the lengths of the successive 65 are taken; This is all the more a reason to avoid each non-alternating light and dark part of each absolutely necessary occupation of core memory cells for rows or columns as numbers of small units,
ten, ό \ - for example by the mesh size of the The invention is based on the object of the

3 4

ükalkonturen the table obtained by scanning, made scannable; this represents the technically To improve characters and at the same time represent the simplest solution. However, it would also be Jurcnaus , .hl d, r for a character required core conceivable, the accompanying stripe in a different way eiw To reduce safe cells. mechanically, magnetically or electronically scanned

According to the invention, the object is thereby carried out. . .. _ro " _t -ii _tenE ; _n _

, East d-ß running in the scanning direction contours- In according to FIG. 2 is shown schematically

Itching of the character or image pattern depending on the direction is 10 the original lxage to be killed, de one accompanying stripe that can be distinguished from this, the letter "R" according to F } * \ ^& ^^ ™ £ Z. ve'd, - _; are, and that a real image of momenan abge ^ is a loading ίο keyed portion of the template to a Jf ™? ^len ° ^e _d £ Sonders signal derived ₅ V '"presence of the accompanying strip during scanning of the template of the lens 11 and this to used projected. As shown in Fig .2a · ^ forth dargötem, de Xl u has prevent the recording device determined in aperture plate 12 is a verhaltni maß'g wines door α dunes Ehrend scanning of such Kontu- Scharf scanning ^{Β. 1} Sns'ii · .! - there is a change from dark to a rectangular one, which appeals to the S ^ rmations (or vice versa). 15 correct mirror surface 14 surrounds

This ensures that the registration device surface is the perforated diaphragm 12 do * "> 'i the information (for example," to think darkly .. ι · »u;" H,. "

S :. * oak was present at the beginning of the accompanying stripe, which ends through the aperture 3 ndmdrtrc

£ - ^ end of the accompanying stripe remains set, light beam falls on the pho £ «^ * -. In the meantime, the total number of perforated diaphragm 12 and ^{photocell are used} . ^1Sl S?,? "^ Be Sh'i:. Small units refer to these and only to arranged, whose, coloring with the coloring d« Be T ^ relates to information, even if the intervening stripes coincide, so that the; ^Be The other of the two windows and the white of the document carrier show little information (i.e., "bright"). To cell 15 has at least approximately the same name

^m ή !. The width of the accompanying strip is not critical; ₃₅ using the mirror items 14 ™ £ * ££ _

must '-only be chosen so that the inaccuracies of the scanned environment on the photocell, 17 vice ^ Ko-: ^ be bridged with certainty. directs. In this beam path, e> n "color filter 18 is on

According to the character or pattern template, which is black-and-white compared to ^ J ^ J ^^, the accompanying stripes are expediently displayed in a complementary color filter, thus for ^ e ^^

t ₃₅ -Αΐ = ^ Α | Λο ^ however

electrical variables each to one of the two inputs AND gate circuit 21 and the

Ve, f, h ™ s see ™ * »= ,, shown Oj ^ * ™ ^ * ---«.

3t. £ i

^lin 'S ^keit ·. _o . - _t ·. _f · κ · RIPR ^mC ahout ^{eS e} d ie ^Z Leitune 25 of the control command is given,

FIG. 4 shows a section of drawings in the case of Über d «L« gJ8 «Stiflher 26 zu

^lin 'S ^keit ·. _o . - _t ·. _for κ ripr ^m üherdieLeitune 25 the control command is given,

The F i g. FIG. 4 shows a section of the pattern in the case of the strip punch 26 over the length of the hole

Vertical and horizontal contours meet. the respective renovation in the _hole .

In the case of the one shown in Fig. 1, as a written ₅₅ exercise.

The letters »R« to be understood are all ^combined * * ° ^η '^ be on hand

borrowed straight vertical contours and also short ^Dl ? _n ^W ^ " ⁿ f" S _6n odd drawn

Pieces of the curved contours, sowe.t se approximated _t ^m **** ^u ™ £ ^ ^U " ^g

be replaced by the vertical tangent ^^^^^ _Xeade ^ _aBmg t3ed ^

can be provided with the accompanying strips 1 ... 7. 60 Here 31 of the front of the _{oil area 14 is}

In the present black-and-white drawing, the dead point is u "o 32 P

the accompanying strips drrrch a difference summed up UjnfeW scanning point 31 on the

SHgSSSSKs ·. SäsfflSeSSSfS

should indicate a bright color. »'T'" °;. "" _ 5 ph ^ orellensoannune stands around this

was therefore able to move into the information change that was detected by “dark” touching of the information, namely

tilt the orderly position. It should be noted that the transition from "dark" of the character to "light" of the original

Circuitry so adjusted is to think that the environment should be registered as genträgcrs.

is rated as light as long as its white component is about 10% in FIG. 4 illustrates the case that a

has not yet fallen below. 5 horizontally on a vertical bar of the

In position b, the scanning of the surroundings detects the character it hits. In such a case, between

Accompanying strip 33, which, as already mentioned, as the beginning or end of the sliding strip 33 and the

dark area evaluates, so that the photocell 17 does not have any edge of the horizontal bar a certain gap

Voltage emits more and the AND gate 21 ge 34 are released, which is at least approximately so

is locked. Thus, by the end of the accompanying struggle, io will be as large as the height of the surrounding area 32. These gaps

fens 33 all counted small units of the information are required so that, during the sampling point 31

tion "dark" assigned, even if it runs onto the horizontal bar, the environment 32

Sharp scanning in the meantime bright parts of the surface is certainly bright.

detects what z. B. is the case in position c. How the described device according to Fig. 2 cr-

already explained, it is the same in effect whether 15 is not only shown in the contour scanning as

these surface parts are really white or the color is advantageous, but when scanning the entire surface

exercise of the accompanying strip. of a character or picture pattern. The to be dismissed

With this unwanted change of information stenden originals are preferably photographed

as well as on the subsequent return to which are made or are photographic copies. Photography

dark contours, as they often contain areas blackened by ao fisch on the further way

Position c takes place after position d , so each small transparent defect. These can be at

the toggling of the flip-flop circuit 23 is prevented. the focus is already sufficient to also

At the end of the accompanying strip 33, i. H. in the position of causing an undesired change of information

lung e, the white of the person wearing the original will be first of all things compared to the size of the surroundings

the environment scanning detected, whereby the AND gate as they, however, so slightly that the environment, even if

23 is unlocked again. This means that the facility is classified as dark if it contains such flaws

prepared for it, which is then activated by the arm and the AND gate 21 remains blocked.

1 sheet of drawings

Claims (3)

1 2 grid network used are specified, determined claims: and in binary coded form in a buffer (punched tape, data magnetic tape or the like) regi- 1. Method for the quantization of a script and from this in a magnetic core memory chens or image samples, preferably to be read in for 5. Purposes of obtaining control data for the The image content stored in this way is known electronic photocomposition, one with a retrieved from the core memory during the setting process.
Graphic template provided with grid line network, the invention is particularly concerned with the on which the character or pattern is compared to the scanning that extends in the scanning direction; Its size in the sentence is shown greatly enlarged in the form of contour pieces of the character or image pattern, point by point and line or column by column, provided that the scanning is carried out column by column, as is photoelectrically measured, and the country is preferred , in the following, for the sake of brevity, these contours are alternately light and dark sections of each row or column are each referred to as vertical contours.
determined as numbers of small units dnd 15 It has been shown that when scanning a vertical contour, which is characterized by it, is not always, as expected, a net, that only contours running in the scanning direction are part of the total length of this vertical contour Character or image pattern is determined for each speaking value, but a number ah an accompanying value distinguishable from this, which are provided in more or less frequent stripes, and that when scanning ao and irregular alternation as light and as dark of the original can be registered from the presence of the accompanying information.
Strip derived a special signal and the- The main cause of this unsafe scanning This is used to prevent the cause of the document carrier from moving as a result of :; The registration device is warped to a temperature and humidity influences during the Abta- se stung such a contour piece occurring 35 that the originally straight line drawn Kon Change from dark to light information for slight indentations and bulges. For this (or vice versa). in the worst case, a certain amount is added 2. Awake method according to claim 1, thereby identifying residual errors in the straight line that are no longer avoidable, that the Eegleib .reifen in a tion of the scanning head. Color is applied. 30 Now there is every "bright" or "dark" decision 3. Procedure according to the claims! and 2, the full column width scanner characterized in that, at the same time as the (or height of a line) applies, the is based on the pre-point-by-point scanning If there is still relatively little irregularity (sharp scanning), a scanning of the surroundings takes place, the largest of which of the contour is so coarsened during the setting process Part of the side field occupies, and that the from 35 reproduced that the contour of the set Schnöder Sharp scanning and which looks downright jagged from the surrounding area. stung resulting electrical quantities each one a particularly disadvantageous consequence of the unsafe