If your file size is too big, it will slow down the delivery or download of your email. Often you can allow the websites and email software to compress and re-size the images for you — but if you do this you have less control over how they look. The video below gives you a step by step guide on how to use picresize.
Is your image square or portrait or landscape? The video below explains the difference between these aspect ratios, why it matters and how to use the free, online tool croppio to crop your images to the correct aspect ratio. Tiny png. Good luck with your image re-sizing. Grab our free 14 page.
PlaceIT is your one stop shop for creating images for online use. Create your business logo with the PlaceIT easy logo maker. Understanding file size for images. Home » Design » Understanding file size for images.
Last updated Mar 8, MB or KB image sizes File size for images and photos is a very rough way to determine the quality an image. You can see how soft the image becomes as Photoshop simply invents pixels and blurs all edges. The best solution is to do the scan again at the correct size. But if rescanning is not possible then there are some different interpolation methods to help with the problem. Genuine Fractals is one such program that allows significant interpolation without significant loss of quality.
You may then crop the image to reduce the file size, or use interpolation to increase the file size. For the sake of simplicity, let us just deal with the finished image after you have shot it, converted it, and done any cropping. This image, when opened in Photoshop, has an "open" or "working" file size, as seen in the Image Size Panel section above.
However, when you come to save the finished image you will have to decide about file compression. Usually you will be save the image either as a TIFF file, which can have compression or none at all, or as a JPEG file, which will always have compression. If the image has been saved with compression then you notice that the save image has a much smaller file size than what it was when it was open. Think of this as "saved" or "compressed" file size.
The problem comes when you look at an image that has been stored on your hard disk and you need to decide what the "open" or "working" file size is as it is the "open" file size that counts when you have to send an image to a client. Figure 10 The image details as seen in Windows 7. Viewing the image details in the file browser it can be seen that the file size is listed as 1,Kb.
As this is a JPEG file it means that this is the compressed size, so the all important "open" file size must be a lot bigger. Figure 11 The image 'properties' as seen in Windows 7. Figure 12 The image details as seen in an image browser.
Usually this information can also be viewed in Bridge, or which-ever image browser software you are using. Again the dimensions are given as x pixels, and that it is a 24 bit RGB image. Now if this was a grayscale image that would mean that the image is 8,, bytes in size, as each pixel equals 1 byte. Figure 13 The image opened in Photoshop. Figure 14 The "open" file size is given at the top of the panel.
At the top is shown the "open" file size, The main point here is that there is a clear difference in file size between the "compressed" size on disk of just over 1Mb, and the "open" or "working" file size of over 23Mb.
So unless you like the idea of torturing yourself with a lot of needless calculation then just open the image in Photoshop and let it do the work. NOTE: If you have a lot of images that you need to inspect for their working file sizes, then there is JavaScript that can run through a whole folder of files and create a spreadsheet that lists the compressed and open file sizes for you. Always check to see if the client has a set list of standards, and always follow that. Usually that will be images saved at dpi, unless they are only intended for the web where the common resolution is 72 dpi.
File size requirements, that is "open" file size requirements, will vary from client to client, but expect that the minimum size to be 24 Mb for RGB images. However, this can be lower for newspapers and will almost always be higher for picture libraries.
Clients will often reject work that does not meets the required standards, with a resulting loss of income for you. RULE 2: Don't get caught in the trap of supplying the images at different working file sizes to fit the layout requirements of a particular job. That is the responsablity of the designer, inless of course they are willing to pay you extra for doing the work.
NOTE: Get in the habit of saying "open file size" or "working file size", and "saved file size" or "compressed file size", and not just using the vague term "file size". This can save a lot of confussion when dealing with clients. The copyright to some material on this website belongs to the individual contributors.
Resolution and File Size In this lesson we look at issues of resolution and file size. Introduction Pixels have no set size, they just expand or contract to fill the space available. Resolution So often people speak about a dpi image as being a quality image. File Size There is actually an easier way to ask the editor what he really wants and that has to do with file size. See more galleries ». Latest in-depth reviews.
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