Musi być jpg.Zamieszczone przez talarczyk
Dla ciekawskich chodzi o konkurs organizowany przez Sony http://www.worldphotographyawards.org
Tu opis jak mają wyglądać zdjęcia:
"How to resize your photo and reduce the file size
We recommend that you save a copy of your original photo before following any of the steps below
To enter the Sony World Photography Awards, your photo file must be in .JPG format and between 800KB and 1.2 MB.
Many digital cameras, when used at their highest quality setting will produce a file larger than this size. This means that you may need to reduce the size of the file before you upload and enter your photograph into the competition.
To create a smaller file, you can reduce the width and height of your photo and/or change reduce the quality at which the image is saved at.
We recommend that your photo is no larger than 1000 pixels wide or high.
Your digital camera's software may provide a resizing tool, which will allow you reduce the width and height of the photo, as well as the quality at which your photo is saved at. For more information, please consult your camera software's manual.
Using Photoshop or Photoshop Elements
This is a popular image editing program for Windows. Follow these steps to reduce the size of your photo:
First, reduce the width and height of your photo:
1. While viewing your photo, click on "Image" and then "Image Size..." in the top menu
2. In the new "Image Size" window, make sure than the "Constrain Proportions" box is ticked, and that "pixels" is selected as the measurement unit against Width and Height. Then, if the Width or Height is greater than 1000 pixels, enter "1000" in the box of whichever is greatest. E.g. if your photo is 1600 pixels wide and 1200 pixels high, enter "1000" in the "Width" box. This will reduce the height of your photo at the same time to 750 pixels.
3. Press "Ok" to apply the change. This will close the "Image Size" window.
Now you can save the new version of your photo, in JPEG format, which will allow you to set the quality setting at which the photo is saved:
1. Press "File" then "Save As..." in the top Photoshop menu
2. In the new "Save As" window, enter a new filename (e.g. "mynewphoto") in the "Filename" box. Make sure that "JPEG" is selected in the "Format" box.
3. Press "Save". This will open a new "Jpeg Options" box with a "Quality" setting; enter "9" or "10" here, and a preview of the new file's size will be displayed (e.g. "~200K"). You can try different quality settings here, from 1 to 12, and see how the size of the file changes. We recommend that you use at least "9" or higher so that you do not lose too much image quality.
4. When the previewed file size is between 800K and 1.2MB, press the "Ok" button to save the new version of your photo.
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