Tutorial - Source mask and background picture

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Mosaizer Pro Tutorial Source mask with a background picture Here you learn how to make a picture from existing photographs, on which a frame and a text were put. We will show how to effectively apply a source mask in combination with a background picture. The use of a 32Bit Overlay is explained and how its transparency will influence the look of the frame. Finally, we will demonstrate how the random settings in combination with a shadow can be used to create a photorealistic effect. How to use a source mask on a background picture ? About source pictures A source picture is the basic picture from which the colors are derived to build a photo mosaic. Usually, the source picture is the picture that needs to be recognized in the result. Not in this case because a source mask is applied, where the source mask filters out any part of the source picture that is not required, leaving only the frame and text visible. When a background picture is active, the source picture may not even be visible any more. In this tutorial we actually use the source picture to color the frame, and the background picture will become the picture we would like to see. Requirements Required for making the photo‐frame is: - a background picture (here: the Yosemite photograph) - the source mask (here: a mask with a white rim and text) - the source picture (here: a photograph of a pink car in Warsaw) Additional requirements: - a bitmap editor (such as Paint.net ...

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MosaizerProTutorialSourcemaskwithabackgroundpicture

Hereyoulearnhowtomakeapicturefromexistingphotographs,onwhichaframeandatextwereput.Wewillshowhowtoeffectivelyapplyasourcemaskincombinationwithabackgroundpicture.Theuseofa32BitOverlayisexplainedandhowitstransparencywillinfluencethelookoftheframe.Finally,wewilldemonstratehowtherandomsettingsincombinationwithashadowcanbeusedtocreateaphotorealisticeffect.

Howtouseasourcemaskonabackgroundpicture?AboutsourcepicturesAsourcepictureisthebasicpicturefromwhichthecolorsarederivedtobuildaphotomosaic.Usually,thesourcepictureisthepicturethatneedstoberecognizedintheresult.Notinthiscasebecauseasourcemaskisapplied,wherethesourcemaskfiltersoutanypartofthesourcepicturethatisnotrequired,leavingonlytheframeandtextvisible.Whenabackgroundpictureisactive,thesourcepicturemaynotevenbevisibleanymore.Inthistutorialweactuallyusethesourcepicturetocolortheframe,andthebackgroundpicturewillbecomethepicturewewouldliketosee.RequirementsRequiredformakingthephoto‐frameis:-abackgroundpicture(here:theYosemitephotograph)-thesourcemask(here:amaskwithawhiterimandtext)-thesourcepicture(here:aphotographofapinkcarinWarsaw)Additionalrequirements:abitmapeditor(suchasPaint.net,PhotoshoporPaintshopPro)tomakethesourcemask.ThestepstocreateabasicresultStep1:preparethesourcemaskThesourcemaskisabitmappicture(jpgorbmp),wheretheblackareasareignored(thustransparent)andthewhiteareasareusedfortheframeandtext.WeusePhotoshoptomakethismask.Don’tmakethemasktoosmallbecausethetextshouldbevisibleandrecognizable.Allfilesshouldhavethesamesizeratio(width/height)toavoidmaskdistortion.Theactualsizeofoursourcemaskis800x600px,andourbackgroundpictureis1200x900pxandsourcepictureis1536x1152px.Step2:loadtherequiredpicturesVia‘File|Load’thesourcefileandthebackgroundfilescanbeloaded.Ifanyofthesefileshavenotbeenusedbefore,youneedtoselect‘Newsourcepicture’and/or‘Newbackgroundpicture’.Afterloadingintheprogramthesepicturesshouldbevisibleinthetoprighttabs.

Step3:loadthemaskThemaskisloadedviathetab‘Masker’.Ifthisisanewmask,itmustbeaddedfirsttothelistofsourcemasks.Thebestwaytodothisisvia‘Tools|Settingsmanager’,andthenpressthebutton‘Addsourcemask’.Whenloaded,themaskcanbeseeninthelistsshownontheright.UsethestandardparametersforF1andF2(16and0).Tosavethesesettingspressthebutton‘Savechanges’,andtomakesureallthesettingsarecorrectlytakenintotheapplication,alsopress‘Reload/restorealldata’.Step4:activatethemasksandmakeafirstphoto‐frameTwotypesofmasksareneededtocreateourintendedeffect:1.selectthesourcemaskfromthepull‐downbox.Wesavedthemaskass_Yosemite.jpgandafterstep3thissourcemaskisnowavailableinthepull‐downlist2.selecttheo32_Button32Bitoverlay.Whenselected,theAlpha‐ andOverlaymasksareautomaticallyloaded.Thesebuttonscancreatea3D‐buttoneffect.Information:the32Bitoverlaymaskconsistsoftwosetsofdata:thealphamaskandtheoverlaymask.Thealphamaskfiltersoutthepixelofthecellthatcorrespondswithablackpixelinthealphamask(gray=shadesoftransparency),whiletheoverlaymaskcreatesasemi‐transparentoverlayontopofthecell.Don’tchangeanyothersettingsofsizeandshapebutsimplyproceedwiththedefaultsettings.Pressthe‘Create’button.Left:initialresultwithdefaultsettings.Itdoesnotlookveryattractive,sosomeadditionaltuningisrequired.

TuningthesettingstothefinalpictureStep5:changethecolorsettingsTheresultwiththedefaultsettingslooksabitsimple:justaveryfew3D‐ buttons,notrandomlyplacedandthesourcemasktextisnotveryreadableeitherbecauselibrarypictureswereusedtocreatethebuttons.ThedefaultsettingfortheOverlaymaskis‘Transparent’.Changethisto‘Colorize’andpressagain‘Create’.Thistimetheresultlooksabitbetterbecauseeachofthebuttonshasnowasolidcolorthatwasderivedfromthesourcepicture(remember:thepinkcarinWarsaw).Left:thedifferencewiththedefaultsettingsisthateachcellisnowcoloredwiththecolorsfromthesourcepicture,insteadofareplacementwithapicturefromthelibrary.Step6:randomizethe3D‐buttonplacementViathetab‘Special’therandomsettingsarenowchangedbytickingbothboxes(Random)‘Build’and(Random)‘Pattern’.Nowtheoverlayed3D‐buttonsarepositionedrandomly,andbuildrandomly.Buildingrandomlymeansthatthebuttonsappeartoberandomlyplacedontopofeachother(so:notfromlefttoright).Don’tforgettoalsoincreasethenumberofrandombuttons(usetheslider‘Amount’).Left:therandomplacementgreatlyenhancestheeffectandthicknessofthelayersof3D‐buttons.

Step7:increasethenumberofbuttons,createashadowforeachbuttonandgetridofthepaleoverlaycolorsThenumberofbuttonsseemstobealright,butwewouldliketoseeamore‘robust’andsolidpictureframe.Thereforeweincreasetheprintdensitydpifrom125to175(leftpicture).

Tocreateabetterphotorealistic3Deffect,weapplythe3Deffect‘Shadow’(middlepicture).Useitsdefaultsettings(5pixelssouth,5pixelseastetc.).Finally(becausetheresultstilllooksabitpale)wechangethecolorsofthebuttonsfromslightlytransparent(theColorizevaluewas5)tofullyopaque.Usethe‘Colorize’sliderandsetitsvalueto10(rightpicture).Nowthebuttonsarefullyopaque.Fromlefttorighttheresulthasnowbeenimprovedwitheachstep:Increasedpito175……applyshadoweffect……opaquecolorsThefinalresultisnowreadyforprintingandsaving.Whenthe‘Automaticresultsave’wascheckedinthetab‘Quicksettings|Othersettings’,theresultingpicturewillbefoundinthe‘/Results’folderofMosaizerPro.Ifnot,theresultcanbesavedvia‘File|Save’.MosaizerPro©APPHelmondJanuary2009www.mosaizer.com

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