Each pixel in a digital image has a particular brightness level, colour and specific location within the frame. Enlarging the image makes each pixel larger and eventually you will reach a stage where individual pixels appear as little boxes. The effects of upsizing and downsizing depend on how much data you start with, which depends on the file format used to store the digital image.
The file format will also determine how much storage space a photo occupies and how long it takes to send as an email attachment. The default file format for all cameras is JPEG, which itself compresses images to make them easier to store and share.
Cameras that support raw file capture can provide compressed or uncompressed options but both will be much larger than JPEGs. The first step in resizing a JPEG image. By default, the dialog box comes up with the width, height and resolution of the images linked this is circled in red in the upper box in the screen grab below. When you resize a JPEG image, opening the dialog box will display its dimensions in pixels, show its resolution and provide several adjustment options.
More sophisticated applications provide a drop-down menu that lets you fit the image to a particular output size, as shown below. Pre-set standard sizes, shown in the drop-down menu above, let you resize images for different applications. You can also change the pixel or length dimensions by adjusting the figures in the dialog box. If you change one figure, the others are automatically re-set to keep the image the same overall size in the example shown, 8.
Checking the Resample box below the link allows you to change the resolution of the image, as shown in the lower box. Look what happens as the image is enlarged; sharp edges vanish and the entire image becomes mushy-looking. Look how much the image file has been enlarged; simply changing the resolution from 72 to has increased the file size from 8.
This is far too much enlargement. The cropping tool is indicated by a reversed square icon in most image editors. To crop the frame you simply place the tool in the part the image where you want to start the crop and drag it across to encompass the area you want to keep.
Cropping to remove an out-of-focus area in the foreground, created as a result of using a very long telephoto lens. The main factor to remember before you crop a digital image is that the pixels you discard cannot be restored. Succinctly: yes. However it will depend on the ISO you used when you first took the photo, how many megapixels your camera has; and how much you crop out. The advice on reducing the pixels size on the camera was great.
I have done this and it has made such an improvement. You can decrease the pixel count by resizing or cropping. You can also increase the pixel count by resizing, but I would not recommend you do that as it creates more blurry images. My photography newsletter is packed with tips and tricks each and every week. These tips will help you master your camera and take simply stunning photos. You'll find yourself taking better shots by using just two or three tips!
Register Sign In. How Do I? Pro Photography Photographer Critiques Storage. Crop or resize? What happens when you pick a lower pixel count setting. Awesome Interesting Useful Boring Comments Doug Darmstaetter says:. David Peterson says:. Peter L. I have a question about resizing for the web.
I have never done that. My question is should I save the file as a high res jpeg and resize or just keep saving them as low res jpegs? Hi Mat C. Thanks Erin. People resize so that they have more control over the exact pixel size of their image. Depending on the final use of the resized image, you might need more control. Hello ErinI was just referred to this site from a friend and really enjoy reading all that is available.
I am new to Photoshop and am trying to learn how to crop and resize. I did a photo shoot for a friend of mine and will be giving a CD of all of the images that were chosen. However, my question is if I do not know what size of image that they want to print, what crop size should I crop the photos to?
Thank you in advance for your response. You must be logged in to post a comment. Understanding Cropping vs Resizing in Photography. Last Updated March 23, Featured Products. Understanding Cropping vs Resizing in Photography This tutorial is the last in a three-part series covering Aspect Ratio , Resolution , and Cropping vs.
I keep the two straight this way: Cropping is for when you need to recompose a picture crop out something to get rid of it or change the focal point or for when you need to make a picture fit a certain size paper. Look how the width measured in pixels has shrunk to now: I like to size my blog images at pixels wide, so you can see that this image is still a bit too wide.
I am left with this Image Size dialog: And I finish with this cropped and resized image: Want more information like this? Posted in Photography Tips , Photoshop Tips. No Comments Angie on May 9, at am. Log in to Reply. Erin Peloquin on May 10, at pm. Angie, in that case you need to crop using the crop tool.
Kerryn on May 9, at am. Amy on May 10, at am. Melody on May 12, at pm.
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