Measuring apparatus of sectional area and volume

[Detailed Description of the Invention]

[Industrial Application] The present invention is concerned with the cross-sectional area and volume measuring device of a measured object, for example, earth and sand and other granular materials, which are conveyed, and relates the cross-sectional area and volume of these measured objects to a cross-sectional area and a volume measuring device measurable with easy composition especially during conveyance.

[Description of the Prior Art] One technique in the case of measuring the cross-sectional area of the measured object (henceforth a "work") which generally exists is explained based on Drawings 10 thru/or 14. As shown in Drawing 10, by extracting filling a certain plane to the surface of work 1 in the shape of a field, by irradiating with narrow irradiation light 2, outline 3 is made to loom in that surface at a line, this outline 3 is taken in in image processing device 5 with video camera 4, and image processing is carried out. That is, the shape of this work 1 can be evaluated by extracting outline 3 portion and making it correspond with the address on a screen in this image processing device 5. As a deer is carried out and it is shown in Drawing 11, they are work 1 and irradiation light 2 and other terms and conditions, When data Without has portion 6 in taken-in outline 3, it is necessary to perform various amendment processings of a picture as a pretreatment, When work l is conveyed by the transportation means of a conveyor belt etc., in order to perform this in real time, a large-sized computer is needed, and there is a problem that the correspondence in the construction site etc. where work 1 is conveyed is difficult. And according to the quality of work 1, the contrast of the picture (in this case, bright section made by irradiation light 2 shining upon work 1) and background equivalent to account outline 3 of" 2 which it is going to extract needs to perform a further multiplex operation, to be low. It is convertible for actual coordinates only by applying the proportionality factor which is usually proportional to the focal length of the lens of video camera 4 on an imaging surface to all the data, when changing into actual coordinates again the coordinates of outline 3 on the screen detected thru/or extracted in this way. However, when it is going to process such calculation in real time, generally a mass and high-speed computer is needed, and processing is difficult on what is called a personal computer level. For example, since there is very much this computational complexity when it is going to perform the operation of contrast reinforcement as the above-mentioned multiplex operation, if it performs by the CPU side of a personal computer level, processing in real time will become take time too much and difficult. A deer is carried out and another problem occurs from the restrictions on installation of video camera 4 in an actual device. It explains below. As shown in Drawing 12, along with the X-axis, it irradiates with the above-mentioned irradiation light 2 from the upper part of work 1. Ingredient 3X of the direction of the X-axis of outline 3 of work 1 shall have length Hl, and image formation 9 connected on the acceptance surface 8 with lens 7 of video camera 4 shall have length Hl. In the state of illustration, video camera 4 is horizontally arranged to this Drawing 12, and shadow area lA of work 1 has interrupted Optical path passing through the center of that lens 7. Here, if all the light that passes along lens 7 is interrupted, ingredient 3x of the direction of the X-axis of outline 3 will not be imaged on acceptance surface 8. Even if the quantity interrupted is partial, the performance of an optical system is reduced. When angle A2 which angle A.I. Artificial Intelligence which the tangent and the horizon of the portion at which irradiation light 2 crosses work 1 make and this tangent, and the light which passes along l / S 7 make is small, lens 7 cannot fully catch the bright section by irradiation light 2. By anyway, arrangement as shown in Drawing 12, If the interval between Fl, lens 7, and image formation 9 is set to F2 for the interval between ingredient 3X of the direction of the X-axis of outline 3, and lens 7, Since only measurement of work 1 which does not have a portion like shadow area IA greatly [ angle A1 ] can be performed while a simple relation called HL=H2andFl/F2., and a formula (1) is materialized, it will become unsuitable to most works l actually. If the optic axis of video camera 4, i.e., the optic axis of lens 7, is leaned as a deer is carried out and it is shown in Drawing 13, many of such problems are solvable. That is, according to this method, the portion which serves as shade with angle theta of the inclination given to the optic axis of lens 7 can be reduced, and loud angle A2 can be taken. However, in this method, according to the height thru/or length Hl of ingredient 3x of the direction of the X-axis of outline 3, interval F1 between lenses 7 changes. For example, since the distance between the peak 3T and lens 7 becomes smaller than interval F1, the following problems generate it. Namely, when the above-mentioned interval Fl changes, ingredient 3X of the direction of the X-axis of outline 3 stops connecting clear image formation on acceptance surface 8 over the all, and it will be in the state where what is called a focus shifted. Such a state is shown in Drawing 14. Drawing 14 reverses the upper and lower sides of image formation 9 of Drawing 13, image formation 9 in the erection state is shown, a figure solid line shows the coordinates of the direction of X of acceptance surface 8, and the direction of Y, and the dotted line shows the coordinates to image. Like illustration, the portion of peak 3T of ingredient 3x of the direction of the X-axis of outline 3 will image to acceptance surface 8 in the state where it was expanded more greatly than a downward portion. Therefore, when it is going to determine the area of image formation 9 in this acceptance surface 8, it is necessary to amend distortion of such a picture. Unlike the case where it is shown in Drawing 12, the relation between length Hl and length Hl becomes complicated like the following formulas. That is, if referred to as Fl/F2=B, it will be O H1=H2mB. (cos theta) + (F1*sintheta-H2*Becostheta) Although this error becomes what cannot be disregarded when determining /(F1acostheta+H2mBasintheta) 001006 formula (2), therefore Salk's l cross-sectional area, It was common sense to need a large-sized computer for performing this amendment processing in real time. The distortion of such a picture is dependent on various kinds of lens systems, such as a surface of a sphere distortion by a fish-eye lens etc. from which it is distorted and also the extent differs by right and left, in addition to [ of the above-mentioned formula (1) and a linear distortion as shown in (2) ] a case. With an actual device, two kinds of measures can be considered to such a problem. even if the first measure is brought close to the state of the illustration to Drawing 12 and uses the above-mentioned formula (1) by decreasing the amount of change by suitable selection with interval F1 and angle theta of inclination, the error which arises by change of interval Fl presses it down to practically permissible within the limits -- it carries out for obtaining Yo 1 -- it thinks and comes out. In this method, an error can be decreased by [ which make angle theta small or enlarges interval Fl ] grazing. However, since the minimum of angle theta of inclination will be determined in the shape of work l, while an error can be decreased by enlarging interval Fl, if interval F1 is enlarged, it will lead to enlargement of the whole device. The second measure corresponds by making the light source of irradiation light 2 brighter, and there is a method of performing the formula corresponding to change of interval Fl about the operation of length Hl. In this method, the formula about a formula (2) is performed in consideration of change of interval Fl, then there is a problem of it becoming impossible to perform this in real time depending on the CPU side of a personal computer level. Therefore, the cross-sectional area of various kinds of works under conveyance, for example, the earth and sand of a construction site, or the granular material of a factory is measured, or it will obtain, if a large-sized computer is not used when measuring that volume based on this cross-sectional area, This 2 which measures in real time is not made, but there is inconvenience that it is easily immeasurable at each spot and there is actually no upper application scene, and there is a problem. * Let it be the subject to have made the [issue which invention tends to solve] present invention in view of the above problems, and to provide a cross-sectional area and a volume measuring device measurable in real time for the cross-sectional area or volume of a work under conveyance by CPU of a personal computer level.

[Means for solving problem] Namely, the illumination method which irradiates with field-like light the surface of the measured object (work) in which the first invention by this application has a transportation means top conveyed, It is a cross-sectional area measuring device which measures the cross-sectional area of the measured object on the above-mentioned transportation means based on the picture signal from this video camera while having a video camera which picturizes the outline of the measured object which came up with the field light of the above while installing in the slanting upper part of this measured object, and is 3. The scanning means which scans perpendicularly that is, the outline in the screen containing the outline of the above-mentioned measured object which exists and is grasped based on the picture signal from the above-mentioned video camera toward the up-and-down direction of conveying machines, such as a conveyor belt on which a work is conveyed, It is a measuring device of the cross-sectional area having a cross-sectional area calculating means which calculates the cross-sectional area between the above-mentioned outline and the above-mentioned transportation means which have been grasped by this scanning means, and a control means which controls this cross-sectional area calculating means and the above-mentioned scanning means. The second invention is a cross-sectional area measuring device which similarly measures the cross-sectional area of the measured object on a transportation means, While dividing into the pixel of a predetermined number the screen containing the outline of the above-mentioned measured object grasped based on the picture signal from the above-mentioned video camera, The memory means which memorized the amendment area value beforehand calculated corresponding to each pixel of these, Adding means 4 adding the above-mentioned amendment area value corresponding to each pixel between the scanning means which scans perpendicularly the outline of the above-mentioned measured object in the above-mentioned screen, and the pixel of the above-mentioned outline and the pixel of the above-mentioned transportation means which have been grasped by this scanning means It is a measuring device of the cross-sectional area having the above-mentioned memory means, a scanning means, and a control means that controls an adding means. The third invention is a volume measuring device which measures the volume of a measured object from the cross-sectional area measured by the cross-sectional area measuring device of above first, The scanning means which scans perpendicularly the outline in the screen containing the outline of the above-mentioned measured object grasped based on the picture signal from the above-mentioned video camera, The cross-sectional area calculating means which calculates the cross-sectional area between the above-mentioned outline and the above-mentioned transportation means which have been grasped by this scanning means, It is a measuring device of the volume having a volume calculating means which calculates the volume of this measured object from this calculated cross-sectional area and the bearer rate of the above-mentioned transportation means, and a control means which controls this volume calculating means, the above-mentioned scanning means, and a cross-sectional area calculating means. Above 5 which the fourth invention is a cross-sectional area measuring device which measures the volume of a measured object from the cross-sectional area measured by the cross-sectional area measuring device of above second, and is grasped based on the picture signal from the above-mentioned video camera The memory means which memorized the amendment area value corresponding to each pixel of these while dividing into the pixel of the predetermined number the screen containing the outline of a measured object, The scanning means which scans perpendicularly the outline of the account measured object of two in the above-mentioned screen", The adding means adding the above-mentioned amendment area value corresponding to each pixel between the pixel of the above-mentioned outline and the pixel of the above-mentioned transportation means which have been grasped by this scanning means, It is a measuring device of the volume having a volume calculating means which calculates the volume of this measured object from this added amendment area value and the bearer rate of the above-mentioned transportation means, and this volume calculating means, the above-mentioned memory means, a scanning means and the control means that controls an adding means. If each above-mentioned invention is summarized, the first and the third invention will be the cross-sectional areas and volume measuring devices to which it was presupposed that the outline of the work by the picture signal taken in with the video camera is scanned perpendicularly. The second and fourth inventions are since the length of a work has only the most important value to the euphotic data length of a certain image formation, The point [ value / of the length of a work ] that oh, it can rudder 6 determine is noted, Without performing the above-mentioned formula (2) in real time for every data, if the amendment value of the length to length is determined about the whole screen, it will stand on the viewpoint that the length of a work and determination of the area based on this length are possible, in real time for every data input, It is the cross-sectional area and volume measuring device adding the amendment area value calculated beforehand. The above-mentioned amendment area value shall prepare this according to various kinds of lens systems.

[Function] In the cross-sectional area and volume measuring device by the present invention, Since [ in having irradiated the work with irradiation light and judging the outline ] the picture information taken in with the video camera is scanned toward the up-and-down direction of conveying machines, such as a conveyor belt on which a lengthwise direction, i.e., a work, is conveyed, While the address of an outline is uniquely detectable, even if data Without has etc, amendment processing is easy for it. 7 As a means to amend distortion of the picture on the acceptance surface by having inclined and having set up the video camera to the work, The whole cross-sectional area is measurable by adding the amendment area of the address portion corresponding to each pixel whenever it memorizes the contents of data which did amendment calculation beforehand as a table of an amendment area value and detects the outline of an acceptance surface. It can ask also for the volume within predetermined time conveyed by applying the migration length by the bearer rate of the transportation means of a conveyor belt etc. to the cross-sectional area determined in this way. Similarly, if area, a moment, etc. of the work corresponding to each pixel are determined beforehand, the area moment of a work, etc. are measurable.

[Example] the cross-sectional area and volume measuring device by one example of the following present invention -- Drawings 1 thru/or 7 -- One 8 It comes and explains. however -- the following explanation -- the -- giving the same numerals to the same portion asO [ 1 ] figure thru/or Drawing 14, the detailed explanation omits this. Drawing 1 is an outline perspective view showing the appearance of the above-mentioned cross-sectional area and volume measuring device 10, and this cross-sectional area and volume measuring device lO have picture taking-in mechanism it and measurement control mechanism 12. lamp 15 and the above-mentioned video camera 4 as an illumination method are provided in housing 14 within protective case 13, and this picture taking-in mechanism 11 appears in it, as shown in Drawings 1 and 2. This lamp 15 shall irradiate with the above-mentioned irradiation light 2 works l, such as earth and sand which have transportation means 16, for example, conveyor belt, top conveyed, and shall take in that outline 3 with video camera 4. the above-mentioned measurement control mechanism 12 receives the image signal from video camera 4, performs measurement control, connects this to pulse generator 17 provided in conveyor belt 16, and appears in it. it is a block diagram showing the composition of the concrete circuit of this measurement control mechanism 12, and Drawing 3 is set to CPU, and it connects each circuit for image processing to microcomputer 20 of 9 The like illustration, and it comes out of it to it. That is, only a picture signal is made separable by image separation circuits 21 from the compound picture signal from video camera 4, and outline 3 is judged by outline level decision circuit 22. D/A converter 23 is connected to outline level decision circuit 22, and it comes out to it. The above-mentioned compound picture signal is inputted into error-handling circuit 25, timing, and control signal generating circuit 26 from sync separation circuit 24, outline level decision circuit 22, Y counter 27, X counter 28, buffer 29, and adding machine 30 are connected to this timing and control signal generating circuit 26, and area ROM31 is connected to buffer 29 and it appears in it. This area ROM31 is the memory means which memorized the table (for example, amendment area value clothes 41.42 mentioned below based on Drawings 7 and 8) which memorized the amendment area value. Pulse generator 17 provided in conveyor belt 16 or pulse 32 between conveyor Running of zero and others is inputted into microcomputer 20 via timing generator circuit 33. while connecting circuits 34, such as display / scanning switch, to microcomputer 20, an output is made possible by making a measuring result into an external signal, and it comes out. As shown in Drawings 4 and 5, window 40 of acceptance surface 8 of video camera 4 shall specify this in a x-Y plane, and shall perform the scan of the section of outline 3 in the plane of window 40. like illustration, from xKushin to Xmax, it is considered as the lengthwise direction direction of X among the 4th figure, and a transverse direction is made into the direction of Y, and window 40 from Ymin to Y ff1ax is set up, and it comes out. therefore -- setting the intersection of Xm1n and Ymin to (0, 0) -- the intersection of Xmax and Ymax -- (N and N) or window 40 -- responding (N, M) -- set up and come out and it is (N and M are positive integers, respectively). The example which divided window 40 of Drawing 4 per direction pixel of xY power in acceptance surface 8 is shown in Drawing 5. In this example, as N and M=O~7, it passes through window 40 in all directions, and divides it, They are coordinates (x) of each pixel from 1 to a scan in this window 40. y) shall be outputted to outline 3 (shadow area in a figure) of work 1, considerable in the bottom, the address signal from Y counter 27 and X counter 29 shall sometimes be outputted area ROM31, and adding machine 30 shall add the amendment area value of the pixel field of the upper part [ pixel / of conveyor belt 16 ] in a lower part from this pixel. Such a measurement control process is based and explained in the flow chart figure of Drawing 6. By processing for the direction of one line of Y, the scan of one line is completed in this flow chart figure, and this flow chart figure performs this flow, whenever the coordinates which are a certain pixels (x, y) are decided. That is, in Step Sl of Drawing 6, the data from Y counter 27 and X counter 28 is read. Or [ that the coordinates of Y have surpassed Y l1lax in the following step S2 ], Or it comes out of this flow and performs 2 error handling or window 40 expansion processing noting that target work l will have deviated from the range of window 40 (Step S3), if it judged whether it would be less than Y l1inch, and it is rYEsJ (a detailed explanation is omitted). If it is rNOJ in above-mentioned Sutee 7 The S2, in the following step S4, it will be judged whether the coordinates of Y are Ymax. the step which will end the scan in this window 40 if it is rYEsJ -- progressing (Step S15 or subsequent ones) -- if it is rNOJ, in the following step S5, it will be judged whether Y is Y min common. If it is rYEsJ, it will be judged whether the coordinates of X are smaller than the bottom of conveyor belt 16 (Step S6). If it is rYESJ, outline 3 of work l will be located up from X+*in in Drawing 4, there will be data, and it will set the flag of -Y area over (Step S7). Such a flag set shall perform other expansion and amendment processing of window 40 as post-processing. 3 which will input the coordinate data of X inputted in the last cycle as bottom data of conveyor belt 16 if it is rNOJ in Step S6 (Step S8). Subsequently, in Step S9, it is judged whether the coordinates of X are smaller than Xm1n. If it is "YESJ, only "+1" will count up a counter as X area over (Step S10). When a count value as well as the flag of the above-mentioned -Y area over has a number-of-times count of predetermined, it is for performing error handling or expansion processing of window 40. in Step S9 -- rNOJ -- be -- in Step Sll of A pair, it is judged whether the coordinates of X are larger than the coordinates of the bottom of conveyor belt 16. In rYEsJ, only "+1" counts up a counter as a data omission (Step 512). If it is rNOJ in Step Sll, amendment area value △S which corresponds to the coordinates of (x, y) from amendment area value table 41.42 (after-mentioned) as shown, for example in Drawings 7 thru/or 8 will be added, and deltaS will be updated (Step 513). And in Step S14, area is calculated by the formula of S=S+delta S. In the above-mentioned step S9, it is rYE4. When it is judged as S" and considered as a data omission, S=S 10deltaS shall be calculated using the last Japanese amendment area value deltaS. If it is rYEsJ in the above-mentioned step S4, in order to end one processing in this window 40, in Step S15, it is judged whether the coordinates of X are equal to the coordinates of the bottom of conveyor belt 16. In Step S17, a flag is set as +Y area over like the flag set of -Y area over which judged whether the last X data was bottom data if it is rNOJ, and was mentioned above when it was To step 516 and "NO." If it is rYESJ in the above-mentioned step S15 and Step S16, in Step S18, the area of cross-sectional area =S-conveyor belt 16 is calculable. A following novel area and flag, and also counter value of a step S19 smell lever are registered, and it is Ri 5 rear To (Step 320) about these because of a next cross-sectional area, a flag, and a count. In Step S21, only "+l" will count up the number of a section, and it will wait for decision of the coordinates (x, y) of outline 3 by the scan of the following cycle. While multiplying the migration length of conveyor belt 16 to the cross-sectional area measured in this way if required, it can ask for the volume of work l in real time by integrating with this about each section. The table of the amendment area value used for the calculation performed in the above-mentioned steps S13 and S14 next is explained. in order to illustrate simply, screen XY is made into division and a total of 64 pixels to every direction, and it comes out. Amendment area value deltaS of each pixel itself which did amendment calculation beforehand is assigned to each pixel, it comes out, and amendment area value table 41 shown in Drawing 7 is a certain thing, For example, if a three or less outline [ which was shown as the thick solid line ] portion has work 1, the pixel (4, 0) which is on the line of Y coordinates-0 in the first scan first is judged to be an end of outline 3, and this amendment area value delta5r199"6 is obtained. amendment area value [ of a pixel (5, 0) ] delta5r215 located in this lower part -- it is considered as aggregate value r903J by adding amendment area value [ of J pixels (6, 0) ] deltaS r234J, and amendment area value deltaS r255J of a pixel (7, O). the following -- Y -- coordinates -- = -- one -- a line -- a scan -- Then. -- a pixel (3, 1) -- the following -- a pixel -- amendment -- area -- a value -- delta -- five -- r -- 181 -- " -- r -- 196 -- J -- r -- 212 -- Jr -- 231 -- " -- and -- "251" -- the above -- Y -- coordinates -- = -- zero -- an aggregate value -- r -- 903 . -- + -- adding . Amendment area value deltaS of a three or less-outline pixel is added like the following, and the total r7895J is obtained. r234 [ subsequently, ] of the total (6, O) of amendment area value deltaS of a pixel located below from conveyor belt 16, i.e., a pixel, -- r255 of J pixels (7, O) -- r231 of J pixels (6, 1) -- r251J of J pixels (7, 1), the total of r229J of a pixel (7, 7) -- the area value of r5495J can be acquired by deducting r2400J from the above-mentioned total r7895J. Next, amendment area value clothes 42 of Drawing 8 assign the sum of amendment area value deltaS of a pixel located in the position of each pixel 7 below from it, and are processing the lower part as an area stripe from the pixel equivalent to outline 3. The flow chart figure of Drawing 6 uses these amendment area value clothes 42. For example, amendment area value △S of the above-mentioned pixel (4, 0) which is on the line of Y coordinates-0 in the first scan is equivalent to sum r903J of amendment area value deltaS of each above-mentioned pixel (4, 0) (5, O) in Drawing 7, (6, 0), and (7, 0). Therefore, when this amendment Area coverage 42 is used, Amendment area value deltaSt of the portion of the pixel which is equivalent to outline 3 without adding amendment area value deltaS of all the pixels - While totaling, the total of amendment area value △S of the pixel of the lower part which met conveyor belt 16 will be deducted, and calculation speed can be shortened. if it states concretely -- first -- amendment area value [ of a pixel (4, 0) ] △5r903 -- the amendment area [△s r l O71J pixel (2, 2) of J pixels (3, 1) -- 0 amendment side 8 the total of product value deltas rl 220J and pixel (5, 7) (7) amendment area value deltaS r635J -- r7895J is obtained. Subsequently, amendment area value [ of the pixel of the lower part ] deltaS, i.e., amendment area value of pixel (6, 0), △S r489J which met conveyor belt 16, the total of amendment area value [ of a pixel (6, 1) ] deltaS r482", and amendment area value [ of a pixel (7, 2) ] △S r247J, and amendment area value delta5r229J of a pixel (7, 7) -- r2400" -- the above-mentioned total -- deducting from r7895J, The same area value r5495J as the case where amendment area value clothes 41 of above-mentioned Drawing 7 are used will be acquired. Other examples of composition of measurement control mechanism 12 of the present invention are shown, and the above-mentioned area ROM31 is directly connected to microcomputer 20, it comes out, and Drawing 9 is a certain thing. It is also possible to measure an area moment with the same technique in the present invention again besides the above cross-sectional areas and volume.

[Effect of the Invention] 9 As mentioned above, in the cross-sectional area and volume measuring device by the present invention, While being able to catch the outline of the work under conveyance easily by scanning in a lengthwise direction to the outline of a measured object (work), The amendment area value which amended distortion of the picture by the installed position of a video camera is memorized as a table of the amendment area value which gave dignity to each pixel, and it calculates using this, Usually, measurement of the cross-sectional area or volume which needs a large-sized computer is easily measurable at a construction site or a factory using the computer of the small capacity of a personal computer level in real time.

[Brief Description of the Drawings]

It is a block diagram in which the outline perspective view and Drawing 2 showing the appearance of the cross-sectional area according [ Drawing 1 ] to one example of the present invention and volume measuring device 10 show the schematic structure figure of same, a cross-sectional area, and volume measuring device 10, and Drawing 3 shows the composition of the concrete circuit of measurement control mechanism 12, 0 Drawings 4 are same and an explanatory view of window 40, and Drawing 5 is an explanatory view of same and the graph for a scan of window 40, Drawings 6 are same, a scan, and a flow chart figure of measurement, and Drawing 7 is an explanatory view of same and amendment area value table 41, In the explanatory view of amendment area value table 42 in other composition of the present invention, and Drawing 9, Drawing 8 is block diagrams of other composition of measurement control mechanism 12 of the present invention, In the principle figure of detection of outline 3 by irradiation light 2 from the former, and Drawing 11, Drawing 10 is same, The explanatory view of outline 3 taken in with video camera 4, the explanatory view showing relative physical relationship with lens 7 of video camera 4 which installed Drawing 12 horizontally to work 1, the explanatory view showing relative physical relationship with lens 7 of video camera 4 which Drawing 13 inclined to work 1 and was installed, 1 Drawing 14 is an explanatory view showing distortion of the picture in the case of Drawing 13. 1 . IA. 2 . 3 . 3X. 3T. 4 . 5 . 6 . 7 . 8 . 9 . 10 . l 1, 12 . 13 . 14 . The shadow area of a work (measured object) and work 1 Irradiation light Outline The peak of the ingredient of the direction of the X-axis of outline 3, and ingredient 3X of the direction of the X-axis, a video camera Image processing device Data Without is a portion. Lens Acceptance surface Image formation A cross-sectional area, a volume measuring device, a picture taking-in mechanism Measurement control 1 mechanism Protective case Housing 2 15 , Lamp (illumination method) 16 Conveyor belt 17, pulse generator 20, microcomputer 21, image separation circuits 22, outline level decision circuit 23, D/A converter 24, sync separation circuit 25, an error-handling circuit 26, timing, control signal generating circuit 27, Y counter 28, X counter 29 ..... /< Zufa 30, adding machine (adding means) Circuits 40, such as 31, area ROM(memory means) 32, pulse 33 between conveyor Running, timing generator circuit 34, and display / scanning switch, a window 41.426. amendment area value table 3 Angle which the tangent of the portion at which A1., angle A2. which the tangent and the horizon of the portion at which irradiation light 2 crosses work 1 make, and irradiation light 2 cross work 1, and the light which passes along lens 7 make Interval F1 between peak 3T and lens 7 ..... interval H1 between interval F2between ingredient [ of the direction of the outline 3171 X-axis ] 3x, and lens 7., lens 7, and image formation 9, the length H2 of ingredient 3X of the direction of the X-axis of outline 3, and the length of image formation 9 Angle [ of the inclination given to the optic axis of theta941. lens 7 ] S, area deltaS, and amendment area value 81~S21. step