It’s a New Year for us too here at AB Print. To start off the year, we’d like to give you some tips on resolution. Not a New Year’s resolution though. Pixel resolution. Understanding pixel resolution can help you and your business when it comes to printing images and documents.
What is resolution?
The number of pixels in an image. There are two ways of expressing resolution:
- Pixel Width X Pixel Height
- Megapixels (pixel width multiplied by pixel height)
So, the resolution of our logo above is width 400 X height 400, or 160,000 pixels, alternatively expressed as 0.16 megapixels. With cameras, the higher the megapixel of photograph the camera can capture, the more pixels and thus more detailed and larger the image will be.
How does this relate to screen resolution?
Whether you have a laptop, phone, tablet or computer, each device has a screen set to a certain resolution; usually the bigger the screen, the higher the resolution.
So, if your monitor is set to 800X600 and you open an image that is 640X480, the whole image will be visible on screen, however if you were to open an image that is 1024X768, you may have to scroll across and upwards to view the rest of the image.
Why do I have an image with a large resolution but inadequate quality?
A factor influencing the quality of an image is the file format/type and file size. Saving a high resolution (1024X1024) image as a non-compressing file type such as .BMP or .TIF will ensure the quality of the resolution is maintained, but will require more data and memory space on your device to store. Conversely, saving a 1024X1024 image in a compressing file type such as .JPG will allow the file size to decrease, but the pixels of the image will be compressed to reduce the data required to save it. Often you may need photo editing software such as Photoshop to alter the file type.
I want to print an image that is 8.5 inches X 11 inches, how many pixels should it be?
The equation for calculating pixels involves another term known as DPI (Dots Per Inch, also known as Pixels Per Inch). Industry standard requirements would recommend 300DPI depending on the makeup of the image. For this, the digital image would need to be 300 times the inch ratio, as you are requiring 300 pixels per inch of the image; meaning the resolution should be 2550X3300. This file size is likely to be quite large, so it’s worth saving an uncompressed .BMP or .TIF version on an external hard drive, and using a compressed .JPG or .PNG file for digital distribution.
Hopefully this has provided a concise explanation into preparing images for print. If there are any more questions regarding image preparation for print, or our printing services, our skilled team at AB Print are locally based in Batley, West Yorkshire, and are on hand to deal with any queries. Give them a call on 01924 473481.
Published By AB Print