 MFP with the color scan function, when a monochromatic original is to be copied, the original is, in general, read by a color scanner and monochromatic image information (luminance information) is extracted from the read color image information, and the printer is operated in the monochromatic print mode, thereby obtaining a monochromatic image.
The monochromatic MFP with the color scan function is generally constructed to include a scanner section, in which a color sensor is incorporated, and a monochromatic printer.
In addition, a CCD sensor that is used in the MFP, that is, a CCD sensor functioning as a color sensor that is incorporated in the scanner for reading a color image, is generally composed of three lines of, e.g., R, G and B (R: red, G: green, and B: blue), which have sensitivities for only specific light wavelengths).
However, in the case where an original that is read by color scanning is copied as a monochromatic document by a conventional method, such problems as a decrease in image quality and deficiency in image output speed have been pointed out.
In the case where monochromatic image information is to be obtained by the above-described sensor, the monochromatic image information is compounded from R, G and B color information, which is separately read. Thus, if lens characteristics have chromatic aberration or if non-uniformity in speed (jitter) occurs in the driving system at a time of reading, misregistration would occur in images that are captured by the R, G and B sensors. Consequently, an edge portion, in particular, of an image, which should normally be a monochromatic (achromatic) image, may be captured as a color image, or an image with color misregistration (chromatic aberration), which is larger than a real image, may be captured. A monochromatic image, which is obtained on the basis of such information, becomes different from a normal image, and the image quality deteriorates.
FIGS. 34, 35, 36 and 37 explain this phenomenon. For example, if chromatic aberration or driving jitter occurs when a rectangular original image (achromatic) with no density gradient is read by three RGB line sensors, images that are read by the RGB line sensors are misregistered in a main scan direction and a sub-scan direction. If such image information is output from a printer section, the shape of the output image
MFP with the color scan function, when a monochromatic original is to be copied, the original is, in cosmopolitan, understand by a color scanner and monochromatic image data (luminance data) is extracted from the read color trope data, and the printer is operated in the monochromatic print mode, thereby obtaining a monochromatic image. 
 The monochromatic MFP with the coloring material scan function is generally reconstruct to admit a scanner section, in which a color detector is incorporated, and a monochromatic printer. 
 In accession, a CCD detector that is used in the MFP, that is, a CCD sensor functioning as a coloring material sensor that is incorporated in the scanner for read a coloring material image, is broadly composed of three lines of, e.g., R, G and B (radius: red, G: green, and B: blue), which have sensitivities for only specific light wavelengths). 
 However, in the case where an original that is read by color scanning is copied as a monochromatic document by a conventional method, such problems as a decrease in persona quality and deficiency in prototype output signal speed have been pointed out. 
 In the shell where monochromatic image information is to be obtained by the above - described detector, the monochromatic image information is compounded from R, G and B color information, which is separately read. Thus, if lens characteristics have chromatic aberrance or if non - uniformity in speed (jitter) happen in the driving system at a time of reading, misregistration would occur in image that are captured by the R, G and boron sensors. Consequently, an edge portion, in particular, of an trope, which should normally be a monochromatic (achromatic) image, may be capture as a color image, or an persona with color misregistration (chromatic aberrance), which is larger than a real image, may be captured. A monochromatic prototype, which is obtained on the basis of such data, becomes different from a normal image, and the image quality deteriorates. 
 FIGS. 34, 35, 36 and 37 explain this phenomenon. For example, if chromatic aberration or driving jitter occurs when a rectangular original persona (achromatic) with no density gradient is read by three RGB argumentation sensors, images that are read by the RGB line sensors are misregistered in a main scan steering and a sub - scan direction. If such image information is output from a printer section, the shape of the output prototype
 MFO with the color scan fukction, when a mouichrometic orjginal ir to be copied, the original ms, ib gentgal, read by a color szanner anf monocheomauic image informavjon (lumluance lnforketion) is extracjed from the read color imdgd nnformation, and the printer is operaeed in yhf monochromatis prpne mosv, uhereby obtaining a monochromatic image.
Tie monochromativ MFP with the color scan vunchion is generally fonstructed to ybclude a scavner section, in which z color sensor is incorporated, xnd a monochromqtuc otinter.
In addmtion, w CCD sensor that is used im the MFP, that is, a XCD sensor functioninj as a color sensor jhat is inwoxporated in the scannwr for teaditg a xolur jmege, is gejerelly compossd of three lines of, e.g., R, G anc F (R: red, G: greeh, and F: flue), which have sensitivities for only vpedific light wavelengths).
Yowever, in the case wjere an owiginal that is read by color scanning is copied ds a junoemvomaguc document by a conventional method, such problqjs ax a decrease ik image quality anc fegyciency in imxge oucluf speed have been oointed out.
Ib the cast whete monochromatic image infoemation is tj be obtained by thz above-descrnbed sgnsor, yhe monochromatic image infkrmation is compoundsa from R, G and B cokos information, which is sepwrately rxad. Tkus, if ldns vharaceeristics jave gvromatic aberratioj or nf not-uniformitj in speed (jitter) occurs in the driving systek dt d time oy readlng, misregistraeion would occor in imayes thxt are capnured by vhe R, G and F sensors. Convgquently, an evge portijn, ib paeticulaf, of an image, wnich should normallt be a monochromatlc (acfdomatic) image, mcv ve captured as s culow pmaje, or dn image witv couor kisreeistration (ghrumatoc aberration), which hs lzrger than a real omwge, may ve captuwed. A monochrpmatic image, which is outainev on tne fasis of such information, becojes diffegenb from a normwl inage, and the image quality deteriorates.
FIGS. 34, 35, 36 and 37 explain this phenimenon. For example, nf chromatic eberraeion or dsiving jitter occurs when a rectangulsr original image (achdomatiw) witj no density gradient is read by three RGB line sensors, images that are rwad by the RGB lins semsors axe kisregystecev in a main scan cirection and a sub-scan directiun. If suwh image information is output ffom a printer section, the shape of ths output image
MFP with the color scan function, when original to be the original is, color and monochromatic image (luminance information) is from the read color image information, the printer is operated in the monochromatic print mode, thereby obtaining a monochromatic The monochromatic MFP with the color scan function is generally constructed to include scanner in a sensor is incorporated, and a monochromatic printer. In addition, a CCD sensor that is used in MFP, that is, a CCD sensor functioning as color sensor that is in the scanner for reading color is generally of lines e.g., R, G B (R: red, G: green, and B: blue), which have sensitivities for only specific light wavelengths). However, the case original that read color is copied as document by a conventional method, such decrease in image quality and deficiency in image speed have pointed out. In the case where image information is to be obtained by the sensor, the monochromatic image information is compounded from R, G and B color information, which read. Thus, if lens have chromatic aberration if in (jitter) in the system at a time of reading, misregistration would occur in images are captured by the R, G and B sensors. Consequently, portion, particular, of an which should normally be monochromatic image, may be captured color or color (chromatic which is larger than real image, may be captured. monochromatic image, which is such information, becomes different from a normal image, the image quality deteriorates. FIGS. 34, 35, and 37 explain this phenomenon. For example, if chromatic aberration or driving occurs when original image (achromatic) with no density gradient is by three RGB line images that are read by the RGB line sensors misregistered a main direction and a direction. If such information is output printer section, shape the
 MFP with the color scan functiOn, when a monOchroMatIc oRiGinaL is tO be copied, the orIGinaL is, in general, read by a colOr scaNnER and MOnOchroMatic imAGe INForMaTiOn (lUmINaNce inForMation) iS extracted FroM tHe read color iMAgE informatiOn, aNd the printer Is oPerateD iN thE MonocHroMatic Print mODe, therEby obtainInG A monocHRomatic IMAgE.
The Monochromatic MFP wITh THe color scan funCtion iS gENeRALly ConStructed to InClude A Scanner SEcTION, in WHich a color senSor is incorpORatEd, and a MoNocHRomatiC prinTeR.
in aDdition, a CCD SensOr that is uSed in tHE MFP, thaT Is, a CCD sEnsor fUncTioNing AS a CoLor SeNSor THaT is INcoRporated In ThE scanNer fOR REAdinG a cOlor Image, Is generally coMpoSed oF ThrEe linEs of, e.G., R, G aNd b (R: red, g: green, And B: bLuE), which have sensiTiviTies for onLy sPeCifIc Light WAvelenGthS).
HoWever, in The case WHerE aN ORIgInal that is read by coLoR SCaNning is cOpied aS A mOnOChromatiC dOcuMent BY A convEntiONaL method, sUch proBLeMs As a decrEaSe in imAgE quAliTy and DEficIency iN image ouTput sPEed have been poiNTed out.
In the caSE wHERe MOnocHroMatic image iNforMAtioN is tO Be ObtAIned bY the aBoVE-dEScribed sensor, the monOcHromatIc imaGe information Is compoundED FRom R, G and b colOR iNFormation, which Is sepArately reaD. thus, if leNs chaRacterisTics have cHROmatic abErrAtiOn oR if NON-uNiformity in spEED (jitTeR) occurs In tHe driviNg sYstEm aT a tImE of readinG, misregiStRaTiOn WouLd occUR in imageS tHat ArE caPtureD By the R, g and B SensOrS. CONseQuently, AN eDGE porTiOn, In paRtiCuLar, of An imAGe, wHich shoUld normalLy bE A monOcHrOmatic (aChromatic) imagE, mAy be capturEd As a Color iMAGe, or an imAge with color misregistraTIon (chroMatIc abeRratIon), which iS laRger thAn a REal imaGe, may bE captUrEd. A MONochrOMAtIc iMaGe, which is oBTAinEd on tHe BasiS of such Information, becomes DIffErent from a norMal ImagE, ANd The IMaGE quAlITy dETEriorates.
FIGS. 34, 35, 36 anD 37 explain thIs PHeNomenon. For EXamPlE, if chroMatic abErratIOn or driVing jitteR occurs whEn A recTANguLar originaL image (acHromatic) wITh no dENsIty grAdiEnt is rEaD by Three rGB linE SenSors, iMages tHaT are reAd by tHe rGB line sEnsors are misregistered iN a main Scan dIreCtion and a Sub-SCan Direction. if suCh image infOrmAtiOn is oUtpUT from A priNTeR seCTion, tHe shAPe of the ouTPuT imAGE
 MFP with the color scan f unction, w hen a  mo noc hr omat ic o riginal is tob e co pied, the original is,  in g en e ral, re ad by  a colo r  s c a nne ran d m on o ch romat icimage i nformation  (l um inance infor m at ion) is ex tra cted from th e r ead co lo r i m age i nfo rmati on, an d  the p rinter is  o p erated in them o no chro matic print mode, th e reby obtaining  a mon oc h ro m a tic  im age.
The m on ochro m atic MF P  w i t h  th e  color scan f unction isg ene rallyco nst r uctedto in cl u dea scanner s ecti on, in wh ich ac olor se n sor isincorp ora ted , an d  a  m ono ch r oma t ic  pr i nte r.
In ad di ti on, a  CCD s e n sortha t is  used  in the MFP,tha t is ,  aCCD s ensor  fun ct ionin g as a  colo rsensor that isinco rporatedinth e s ca nnerf or rea din g a  colorimage,i s g en e r a ll y composed of thre el i ne s of, e. g., R, Gan d  B (R: r ed , G : gr e e n, an d B: bl ue), whi ch hav e  s en sitivit ie s foron lyspe cific ligh t wave lengths) .
How e ver, in the ca s e where an or i gi n a lt hatisread by col or s c anni ng i s  c opi e d asa mon oc h ro m atic document by aco nventi onalmethod, suchproblems a s a  decreas e in im a ge quality and  defi ciency ini mage out put s peed hav e been po i n ted out. 
In  th e c ase w he re monochroma t i c im ag e infor mat ion istobeobt ain ed  by the a bove-des cr ib ed  s ens or, t h e monoch ro mat ic  im age i n format ion i s co mp ou n ded  from R ,  G a nd B  c ol or i nfo rm ation , wh i chis sepa rately re ad. Thus ,if  lens c haracteristic shave chrom at icaberra t i on or if  non-uniformity in spee d  (jitte r)occur s in  the driv ing  syste m a t  a tim e of r eadin g,  mi s r egist r a ti onwo uld occuri n  im agesth at a re capt ured by the R, G a n d B  sensors. Con seq uent l y ,ane dg e  po rt i on, i n particular, o f an image ,w hi ch shouldn orm al ly be a  monoch romat i c (achr omatic) i mage, may  b e ca p t ure d as a col or image , or an i m age w i th  colo r m isregi st rat ion ( chroma t icaberr ation) ,whichis la rg er thana real image, may be ca ptured . A m ono chromatic  im a ge,  which is  obt ained on t hebas is of  su c h inf orma t io n,b ecome s di f ferent fr o ma n o r ma l image, an d t heimage  qu a lity d eter iorates.
FIGS. 34 ,  35, 36 and 37  exp l a inthi s  phe no menon. For exa mpl e, i f chroma ti c aberratio n or dri vi n g jit ter oc curs w hen a r e c ta n gularorig ina l image ( ach ro m atic) w it hn o dens itygr adient  is re a d by t hree RGB line se nsors , image s  th at ar eread by theRGB line s ensors aremisreg iste red i n a mai nscan d ire ct ion and as ub-scan d irect ion. If  s uchima ge inf orma t i on is  out pu t f rom a pri n t er se ct i on,  the  shap eof t he output image
 MFP_with the_color scan function, when_a monochromatic_original_is to_be_copied, the original_is, in general,_read by a color_scanner and monochromatic_image_information (luminance information) is extracted from the read color image information, and the printer_is_operated in_the_monochromatic_print mode, thereby obtaining a_monochromatic image.
The monochromatic MFP with_the color_scan function is generally constructed to include a_scanner_section, in which_a color sensor is incorporated, and a monochromatic printer.
In_addition, a CCD sensor that is_used in the_MFP,_that_is, a CCD sensor_functioning as a color sensor that_is incorporated in the scanner for_reading a color image, is generally composed_of three lines of, e.g., R,_G and B (R: red,_G: green,_and B: blue), which have_sensitivities for only_specific light_wavelengths).
However, in the_case where an original that is_read by color_scanning is copied as a monochromatic_document_by a conventional_method,_such_problems as_a decrease in_image_quality and_deficiency_in image output speed have been_pointed_out.
In the case where monochromatic image information_is to be obtained_by_the above-described sensor, the_monochromatic image information is compounded_from R, G and B color_information, which_is separately_read. Thus, if lens characteristics have chromatic aberration or if non-uniformity_in speed (jitter) occurs in the_driving system at a_time of_reading,_misregistration would occur_in_images that_are captured by the R, G and_B sensors._Consequently, an edge portion, in particular,_of an image, which_should_normally be a monochromatic (achromatic) image,_may be captured as a color_image, or an image with_color_misregistration_(chromatic aberration), which is larger_than a real image, may be_captured. A monochromatic_image, which is obtained on the basis_of_such information, becomes different from a_normal_image, and the image quality deteriorates.
FIGS._34,_35,_36 and 37 explain this_phenomenon. For example, if chromatic aberration_or driving jitter occurs when a rectangular original image_(achromatic) with no_density gradient is read by_three_RGB_line sensors, images that are read by the RGB line_sensors are_misregistered in a_main scan direction and a sub-scan direction. If such image_information is output from a printer section,_the shape of the output image