03-13-2019, 02:07 PM
Adding to Ofnuts post:
You must already realise that your image is way too small. If it was a photograph for printing you might use a print resolution of 300 pixels-per-inch (ppi). That image 600 x 300 pixels would print at just 2 inches x 1 inch
However for a poster viewing distance comes into play. Check the chart here: http://resources.printhandbook.com/pages...ce-dpi.php for a guide. A 4 foot wide poster? maybe viewed at 6 feet, then maybe a ppi of 90 might be ok.
Your image is the wrong proportions for 4.0 x 2.5 feet but for 4.0 x 2.0 an image size 48" x 90 ppi = 4320 pix wide is required. Which means scaling up the image by a factor of 7.20 Never a wonderful idea.
However, say you do scale it up. Then if you set the zoom to 100% and in View menu untick dot-for-dot you will see what it looks like as a print: https://i.imgur.com/zQ7hFHJ.jpg (remember to turn dot-for-dot off when finished with it)
You might sharpen a little using Filters -> Enhance -> Wavelet Decompose and enable the 3rd or 4th scale layer. https://i.imgur.com/VnYZuPE.jpg
Banner printing is not cheap. You might want to reconsider using that image.
Using a too small image for printing is a very common beginner error. The only real way is to start off with the correct image size in pixels for whatever the intended use.
You must already realise that your image is way too small. If it was a photograph for printing you might use a print resolution of 300 pixels-per-inch (ppi). That image 600 x 300 pixels would print at just 2 inches x 1 inch
However for a poster viewing distance comes into play. Check the chart here: http://resources.printhandbook.com/pages...ce-dpi.php for a guide. A 4 foot wide poster? maybe viewed at 6 feet, then maybe a ppi of 90 might be ok.
Your image is the wrong proportions for 4.0 x 2.5 feet but for 4.0 x 2.0 an image size 48" x 90 ppi = 4320 pix wide is required. Which means scaling up the image by a factor of 7.20 Never a wonderful idea.
However, say you do scale it up. Then if you set the zoom to 100% and in View menu untick dot-for-dot you will see what it looks like as a print: https://i.imgur.com/zQ7hFHJ.jpg (remember to turn dot-for-dot off when finished with it)
You might sharpen a little using Filters -> Enhance -> Wavelet Decompose and enable the 3rd or 4th scale layer. https://i.imgur.com/VnYZuPE.jpg
Banner printing is not cheap. You might want to reconsider using that image.
Using a too small image for printing is a very common beginner error. The only real way is to start off with the correct image size in pixels for whatever the intended use.