I have set it to sequence scanning which means that I don’t have to use the mouse in order to start the scanner but it will scan by pressing its button. Here are the settings on my scanner’s program. My painting is 56×76 cm I need it for web use and to keep a HR copy just in case so I’ll scan at 150 dpi. I’m going to scan one of my night skies ( that needed either way to rescan it ). ( larger painting, more scanned parts that have to be smaller in their size). If you want to scan a larger than 56×76 cm paper, then go for even lower resolution, less than 150 dpi for editing reasons. So we have to set up the scanner to the best ( optimal ) resolution in order to do so.įrom my experience the very high resolution for a 56×76 cm painting is 300dpi but if your scanner has good sensors and you are going to use your image for web use you can go for 150 dpi without any serious lose of quality. #Gimp color palette from image without averaging PcThe image file must not be that large in size in order to be able to be edited later without exceeding the processing power of the pc and end up with a final file that will be huge and so impossible to manipulate/edit easily. Then these scanned parts of the painting, have to be assembled in one and single image file. Large paintings have (inevitably )to be scanned in parts. Then start the scanner’s settings program on the pc and lets proceed with the scanning. On some scanners this can be done by pulling the lid up and then open it completely flat, and in some other by removing completely the lid. Then open the lid of the scanner completely flat. You’ll need enough space in order to be able to move and place your large painting freely on the surface of the scanner. If your desk is not large enough place the scanner on the floor. Let’s start: Connect the scanner on the pc and place it on a large steady and flat surface. Make sure that the glass of the scanner is clean ( and check it periodically while you are scanning ). I find very convenient to use one of my A4 hardbound sketchbooks because they are heavy enough to keep the paper in place. Other things that you are going to need is an A4 carton, or an A4 Sketchbook, something at A4 size in order to put it over the part of your painting you scan each time. #Gimp color palette from image without averaging downloadThen you can comment or ask questions freely.įor the purposes of this tutorial I’m using an Epson Perfection V33 A4 Scanner ( an average cheap commercial scanner) and GIMP image editor version 2.8 ( free to download and use manipulation program). ( either to show your work on your web site or sent high resolution images for joining competitions and such things).Īs this tutorial is going to be large, and will need more than three posts to complete please avoid to post anything until I write THE END. #Gimp color palette from image without averaging how toIn HR images is visible the texture of the paperīut how is it possible to scan large paintings, on a A4 scanner?īelow I’ll make a step by step tutorial on how to do this together with full step by step ( with photographs and screenshots ) instruction on how to manipulate and edit your scanned material in order to have a perfect and high definition and resolution image, chromatically accurate that shows also the texture of the paper, ready to use for any purpose you might need it. The colours are better and more accurately detected. You don’t have any lens distortion on your picture. So I ended up to the conclusion that the best way to have a perfect image of larger paintings ( from A3 size to whatever size you want) is to scan them. The camera has to be of a very good quality, with very good lens that doesn’t distort the edges of the image, and good sensors that can catch accurately the colours of the painting, mounted on a tripod with a good light installation in order to avoid shadows or glares on our photographed image.īut even all these exist, ( and lets say that someone invested the money to have all these equipment), cameras can never catch the texture of the paper no matter how well the painting is photographed and what are the lighting conditions are available. Large watercolour paintings can be quite tricky to photograph sometimes.
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