Large Original
Tuesday, April 12th, 2011|
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Gramicci Men’s Pants – L – NWT in original shipping bag $20.50 |
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Original JML Point n Paint Replacement Large Small Pads $8.68 |
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Large Original Marc Chagall “Over Vitebsk” framed Lithograph Jewish village RARE $4,800.00 |
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BENFICA SOCCER JERSEY 2011-2012 ORIGINAL SIZE X-LARGE $40.00 |
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ORIGINAL VINTAGE PHOTO G2713 Woman in coat posed by large statue,shadow $5.98 |
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ORIGINAL VINTAGE PHOTO G2714 Large dog sitting in snow $5.98 |
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GUITAR print tshirt ORIGINAL artwork screen print tee $10.99 |
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Vintage Original Harley Davidson t shirt 1991 utah motorcycle large eagle logo $15.50 |
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COEXIST print tshirt ORIGINAL artwork screen print tee Religion Tolerance Peace $10.99 |
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BUCK FOSTON funny Yankee fan print tshirt ORIGINAL artwork screen print tee $10.99 |
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LOVE THY NEIGHBOR print tshirt ORIGINAL artwork screen print tee Peace Tolerance $10.99 |
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Original BLACK VELVET hand PAINTING of Gorgeous Large 3 Horses FACEs FREE SHIP $125.00 |
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IMAGINE NO RELIGION print tshirt ORIGINAL artwork Atheist tee Free Thinker $10.99 |
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Large Wool Advertising Sale Sign, 18″X2′, New Old Stock $9.99 |
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THE EAGLES vtg original 30th anniversary classic mens long sleeve navy L $19.99 |
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Vintage Original by Robert LARGE Enamel Flower Pin $45.00 |
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FoLk ArT PaINTING LaRGe OrIgInAl YeLLoW RoSeS PiNk PaStEl BlAcK VaSe $50.00 |
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YOU HAD ME AT BACON funny print tshirt ORIGINAL artwork screen print tee $10.99 |
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ORIGINAL B & W PHOTO UG3440 LARGE MODEL AIRPLANE $5.98 |
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LARGE “THE MEDITERRANEAN LANDSCAPE” ORIGINAL PAINTING ON CANVAS BAROQUE FRAME $189.00 |
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LARGE “THE MEDITERRANEAN LANDSCAPE” ORIGINAL PAINTING ON CANVAS BAROQUE FRAME $189.00 |
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Silver RANGERS FOOTBALL CLUB Ring -Original Box $7.82 |
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PRIVATE PROPERTY SIGN 29″X23″ – ALUMINUM LARGE SIGN $32.99 |
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LARGE LOT 1960′S LINCOLN CONTINENTALS.ORIGINAL VINTAGE SCREW KIT CONV’TS, SEDANS $52.97 |
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Juventus 95/96 Gianluca Vialli Shirt Maglia Brand New with Tags in Original Bag. $156.49 |
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LARGE 18TH CENTURY CHINESE FAMILLE ROSE PORCELAIN PLATE, YONGZHENG PERIOD $395.16 |
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LARGE PAIR OF 19TH CENTURY CHINESE PORCELAIN FIGURES, BOYS HOLDING LOTUS FLOWER $711.30 |
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good quality large antique chinese carved hardwood stand. $28.44 |
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Lovely Antique Victorian c1900 Carved Wooden Elephant Large $71.13 |
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Frank Zappa Original Black Small to X-Large $20.53 |
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Frank Zappa Original Black Small to X-Large $20.53 |
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Frank Zappa Original Black Small to X-Large $20.53 |
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Frank Zappa Original Black Small to X-Large $20.53 |
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Frank Zappa Original Black Small to X-Large $20.53 |
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Frank Zappa Original Black Small to X-Large $20.53 |
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Frank Zappa Original Black Small to X-Large $20.53 |
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Frank Zappa Original Black Small to X-Large $20.53 |
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Frank Zappa Original Black Small to X-Large $20.53 |
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ORIGINAL LARGE OLD VINTAGE HUMBER SPANNER $15.81 |
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ORIGINAL LARGE OLD VINTAGE HUMBER NUT SPANNER $15.81 |
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Large Amethyst necklace original one of a kind designer piece $9.99 |
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GHH T-Shirt Cotton Snooky’s Vintage Originals Black Men’s Large Ea $21.95 |
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New Izod Men’s Original Silk-Wash Pique Sport Shirt $18.67 |
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New Izod Men’s Original Silk-Wash Pique Sport Shirt $18.67 |
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LARGE 18TH CENTURY CHINESE EXPORT PORCELAIN PUNCH BOWL $632.26 |
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ITALY FIAT AUTO EARLY CAR TRUCK ANTIQUE ORIGINAL LARGE PROMOTIONAL PHOTO 9×11″ $39.90 |
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FoLk ArT PaINTING LaRGe OrIgInAl ReD LiLy LiLiEs GrEEn YeLLow GaLLeRy CaNvAs $100.00 |
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ITALY FIAT AUTO CAR TRUCK ANTIQUE ORIGINAL LARGE PROMOTIONAL PHOTO 9×11″ $39.90 |
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~Tree of Love – LARGE Original Graffiti Canvas Artwork. Street, dark, Kidrobot~ $31.60 |
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ITALY FIAT AUTO CAR ANTIQUE ORIGINAL LARGE PROMO PHOTO 9×11″ $24.90 |
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ITALY FIAT AUTO CAR TRUCK ANTIQUE ORIGINAL LARGE PROMOTIONAL PHOTO 9×11″ $24.90 |
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ORIGINAL RAILWAY LARGE FORMAT b/w NEGATIVE OF LOCO “65323″ at THORNTON $5.53 |
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ORIGINAL RAILWAY LARGE FORMAT b/w NEGATIVE OF LOCO “65388″ at STRATFORD $5.53 |
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Livin’ Large Original 27×40 Movie Poster $10.99 |
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ORIGINAL RAILWAY LARGE FORMAT b/w NEGATIVE OF LOCO “65405″ at IPSWICH $5.53 |
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LARGE 19th CENTURY CHINESE PORCELAIN BULBOUS BOTTLE VASE, THE EIGHT IMMORTALS $474.19 |
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WACKY SOX Original Hoops Unisex Socks – 3 Pair Pack $30.02 |
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Ben Sherman Original Khaki Green Long-Sleeve Shirt 3 L $29.32 |
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Inca (Complete Large Original Retail Box) PC 3.5″ DISKS $44.99 |
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Fade to Black (Complete Original Unique Large Box) PC $49.99 |
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ORIGINAL BREE HANDBAG CHOCOLATE BROWN $400.00 |
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ORIGINAL LARGE 19TH CENTURY PHOTOGRAPH OF NAPLES, ITALY, BY SOMMER $3.95 |
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ADIDAS ORIGINALS CHILE 62 FULL TRACK TOP JACKET TT BLACK/RED (L) $102.73 |
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ORIGINAL REVENGE OF THE JEDI SHIRT return Star Wars 1983 1982 vintage MINT $199.95 |
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LARGE 18TH CENTURY CHINESE FAMILLE VERTE CHARGER, YONGZHENG $395.16 |
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ORIGINAL REVUE DE LA MODE April 2 ,1892 +LARGE hand colored engraving $18.50 |
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Original Breast Cancer Ladies Woman Black T-Shirt Large $9.99 |
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Original Penguin Basic Tailored Shorts Castlerock Various Sizes $72.71 |
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Original Modern Large Art Flowers Tree Landscape Oil Painting On Canvas Khp799 $24.99 |
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TWO LARGE ORIGINAL EGYPTIAN PHOTOGRAPHS BY BEATO $31.61 |
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Large Lot of 1959 – 1960′s Barbie Doll Clothes Originals with Tags Vintage NR $21.61 |
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ORIGINAL CANVAS ABSTRACT PICTURE LARGE ART PRINT MODERN ART CONTEMPORARY AUTUMN $23.69 |
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NWT $36. DISNEY ORIGINAL MINNIE MOUSE top/shirt Burgandy ROSES sz LG FREE SHIP $14.99 |
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LARGE CHINESE HENAN BLACKWARE JAR – YUAN / MING DYNASTY – 14TH-15TH CENTURY. $355.66 |
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TWO VINTAGE LARGE CRYSTAL LAMPS WITH ORIGINAL SHADES $799.00 |
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Skid Lid Original Motorcycle Helmet Flat Black Large $35.99 |
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Doctor at Large 1957 original posters Combo British Comedy x 2 look $19.07 |
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VINTAGE LARGE RESTAURANT ADVERTISING SIGN $9.95 |
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MAN WITH THE GOLDEN GUN ORIGINAL FRENCH LARGE POSTER $553.25 |
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Large Lot Vintage Sewing Buttons on Original Cards!! 11 Cards!! OLD NOTIONS $9.99 |
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Huge Large Art Original Blososm Floral Landscpae Oil Paintings On Canvas Khp774 $49.99 |
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GIANT Original Leisure Cycling Shorts Black $29.99 |
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Vintage Original Rare Heart 1988 Bad Animals Tour Shirt $59.95 |
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ADAMI VALERIO FAB LARGE ORIGINAL LITHOGRAPH 1976 NO RESERVE $30.03 |
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TANKFARM original LOCK & LOAD classic mens thin t-shirt gray L $7.99 |
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QUIKSILVER original classic mens thermal long sleeve t-shirt white L $9.99 |
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Large GMC Truck Emblem Original Equipment $50.00 |
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LARGE HUGE FRENCH IMPRESSIONIST SCHOOL PAINTING J P Hamilton Original oil $895.00 |
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JAGUAR original classic mens t-shirt black L NEW $9.99 |
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JACK JOHNSON original TO THE SEA classic mens t-shirt black L $9.99 |
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UNDER ARMOUR original classic mens track zip jacket black L $34.99 |
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HARLEY DAVIDSON original RIVER RUN classic mens tank t-shirt black L new $14.99 |
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WRANGLER vtg WESTERN original classic mens button front shirt Large $11.99 |
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UNDER ARMOUR heat gear original classic mens t-shirt orange L $8.99 |
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PERRY ELLIS vtg america original classic mens button front shirt large NEW $6.99 |
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JOHN COUGAR MELLONCAMP original RURAL ELECTRIFIATION classic mens t-shirt L NEW $16.99 |
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DC original classic mens long sleeve sweater brown blue yellow L NEW $12.99 |
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Vintage New Original Very Rare St. Paul Concert T-Shirt $129.95 |
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SLASSY SCULPTURE LARGE wall decor ABSTRACT METAL ART Long modern Original – Lubo $275.00 |
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ALEXANDER CALDER FAB LARGE ORIGINAL LITHOGRAPH 1976 NO RESERV $39.52 |
Calculating Image size when Producing Artwork for Large-Format Digital Printing
One question pops up time and time again when producing artwork for use on a popup exhibition stand, bannerstand or other large format printing application – “What d.p.i. should I save the images?”
This is impossible to answer without knowing more information about the size of the original, what size it is to be enlarged to, the subject matter, how it is to be used within the design and how it has been produced and a number of other factors. It can be considered that perhaps the question is not the right one to be asked but we will return to that later.
The first thing to be considered is the origination. Most images available from image libraries as well as those sourced from professional photographers specifically for the project will have originated on a digital camera. At the time of writing the highest resolutions available are around 15 megapixels. So it can be deduced that for a photographic image the maximum pixel size that can be achieved for a single image is 4492 pixels x 3328 pixels (which gives a 42.8M image). This, therefore gives us a maximum achievable image file size of 42.8M.
Just to get a handle on why this is significant let us now consider that image in terms of d.p.i. At screen resolution – 72 dpi this will translate to a physical dimension of approximately 158cm x 117cm At a print resolution of 600 dpi which most large format printers are capable of this equates to a physical size of 38cm x 28cm :Both images are displaying the same amount of information but one is 5 times the size of the other! So you start to see that considering dpi is meaningless without also knowing the physical size that you wish to achieve.
This concept will be further complicated by the fact that the large format printer will print a specific resolution regardless of the image information that is sent to it as it will interpolate (add or remove pixel information) to suit the specific pitch of the dot pattern. If, for a certain size image, it is given more information than it can print at 600 dpi, it will remove pixels at regular intervals and conversely if it has too little information it will add dots by looking at the dots around the one to be printed and calculating the colour that will produce the smoothest transition.
There are limitations in both directions, enlarging and reducing. An image that is over-enlarged will go very soft and blurry at the transitions from one colour to the next and an image that is printed too small will have too little space, at a fixed dot size and pitch, to reproduce the graduation between one colour and the next. Imagine a page of text reduced so small that there is only one dot available for each letter – it would obviously be illegible.
A further complication is added when you factor in whether any jpeg compression has been added to the image. At high compression ratios the image can be damaged and show ugly artifacts especially at the edges of image elements and in areas of high contrast. Graduated areas such as sky can also lose the subtlety of the gradient and become stepped and posterised. On the plus side we must consider that we are dealing with large format graphics here and as such they are generally viewed from some distance away. Even with quite low resolution origination, with the judicious use of interpolation to disguise pixellation, it is possible to produce results that are acceptable when viewed from a few feet away.
So, to return to the original question of what dpi an image should be saved at, for a particular purpose, it is perhaps more effective to thing in terms of how much information there is – its megabyte size, and its suitability for enlargement (i.e. its image quality and complexity of detail)
As a rough guide it may be helpful to think in terms of one image covering the whole of a popup stand. To give a good balance between the quality of the final print and the size of file, I would recommend a file size of around 150Mb – 200Mb. No I haven’t forgotten that the original image would have been 42Mb or less but it is worth increasing the pixel size of the image using interpolation (or ‘resing up’) in order to minimise the enlargement of the pixel shape thus avoiding any blocky shapes or pixellisation. If the image covers about half that area it need be only half the file size and so on. Another way to calculate this would be to save the image at around 25Mb for each square meter of space covered.
About the Author
Matt has been in the exhibition industry for over 20 years
View his website at www.exdisplay.co.uk