A picture file size of 4,000 x 3,000 pixels will have a higher image resolution than a file size of 2,000 x 1,500 pixels. Image Resolution: In general terms, image resolution refers to the amount of digital information contained in an image file. Adobe Photoshop Elements is the best known photo editing software from which you can change file sizes as well as enhance and/or fix your images. If the pictures you have already taken are large files, many photo editing programs have functions which allow you to reduce the size of an image file. Taking pictures at different file sizes will make more sense as you continue to read about image resolution and print sizes. Images with smaller file sizes are easier to send and download when using email or social media. That feature can save space on your cameras memory or in your computer hard drive. So in this case the image might be called an 8 Megapixel picture although it does not contain a full 8 million pixels.Īlthough digital cameras are often marketed with emphasis on the total number of megapixels available for an image, they all have settings which allow the photographer to take pictures with smaller file sizes. (3,456 X 2,304=7,962,624 ) Usually the total amount of pixels is rounded up or down to the nearest megapixel. To find the total number of pixels in an image, just multiply the number of pixels in the width of the image by the number of pixels in the height of the image. That means there are 3,456 total pixels in the combined rows of pixels in the image from left to right, and 2,304 total pixels in the combined columns of pixels from top to bottom. For instance a file size might be written as 3,456 X 2,304. Image File Size: The file size of an image is expressed by the total number of pixels in the width and height of an image. However, there will be thousands or millions more pixels in an area equivalent to picture #1B when you take your pictures. Picture 1B shows a portion of picture 1A with the pixels greatly magnified and exaggerated so that you can see how pixels form an image. For the record, there are one million pixels in a megapixel. The light captured at each cell location is called a digital camera pixel. (Pic-El) Every digital camera contains a device called the image sensor which has millions of light capturing cells. What are Pixels? The word Pixel is a shortened and combined version of the words Picture and Element. That way, you will have a better understanding as to why certain images should only be enlarged to certain print sizes. Still, it is probably a good idea to first read the following information on pixels, image file sizes, and image resolution. It can be helpful if you are thinking about ordering enlarged prints or canvas prints of your pictures from an online printer like (depending upon the amount of cropping)įor reference purposes, there is a photo enlargement chart further down on this page that will give you an idea of the best image resolution needed for various photo print sizes. Also,because they contain more digital information, high resolution images can be cropped if necessary, and still retain enough digital information to produce a decent print. Higher resolution images can be printed to larger sizes with less loss of image quality than low resolution images. The image resolution is simply the information about the pixel density of the image. The quality of a digital picture is largely dependent upon the number and size of the digital camera pixels contained in the image.
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