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How to Save an Image in GIF or JPEG Format

GIF and JPEG are the two image file formats most commonly used to show pictures on the Web. They are the only image formats accepted by the Online Abstract System. If you wish to include an image with your abstract, it must be one of these formats, and any image file name must therefore end with a .gif or .jpg file extension.

Your word processor will probably do this for you...

Most word processors will allow you to paste a captured screen into a document. You may also paste other bitmap images (e.g. TIFF files, BMP files, etc..) into the document. If you then save this document as an HTML file, any bitmap contained in the document will usually be saved as a separate GIF file. (Look for a .gif file created in the same directory at the same time as the .html file.) The resolution of this GIF file will be the same as the captured screen or the original bitmap file.

Many word processors will also allow you to create a vector graphic image, or paste a vector graphic (e.g. WMF) into a document, or copy images directly from a vector graphic drawing application. If you then save this word processor document in HTML format, any vector graphic contained in the document will usually be saved as a separate GIF. (Look for a .gif file created in the same directory at the same time as the .html file.) While convenient, this is not a recommended method for creating a GIF image. Vector graphics will be converted to GIFs at low resolution -- the rough equivalent of 72 dpi. Thus, if you want to include such an image in your abstract, we recommend that you first save your image as a GIF, JPG. TIFF, BMP or other bitmap file, and then insert that image into the document.

There are many other ways to create an image in the required format:

  • If the image was created in a drawing application such as Adobe Illustrator or Macromedia Freehand, make sure that the smallest numbers and letters are at least 10 pixels high, and preferably 20 pixels high. Then save it as a GIF or JPEG file.
  • If the image was created in a presentation package such as PowerPoint, save the presentation in HTML format. All pictures, charts, and tables in the presentation will be saved as separate GIF files. (Look for a .gif file created in the same directory at the same time as the .html file.) The resolution of the GIF files may be higher if you have your own screen is set at high resolution -- e.g 1024x768 -- at the time you save in HTML format.
  • Several HTML editors, such as Netscape Composer, allow you to drag a bitmap image into a document. When that document is saved is saved as a .html file, any image contained in the document will be saved as a separate GIF or JPEG file. (Look for .gif or .jpg files created in the same directory at the same time as the .html file.) The resolution of this image will be the same as the original bitmap image.
  • If none of the methods described above are available to you, but you have access to a scanner, then scan from a drawing on paper. We recommend that you scan in grayscale mode, at a resolution of 300 dpi if the image is less than 4.5 inches wide, at a resolution of 200 dpi if it is more than 4.5 but less than 6 inches wide, and at 150 dpi if it is over 6 inches wide.
  • There are many image editors, such as Adobe Photoshop, that will open different kinds of image files and save them in GIF or JPEG format.
  • If you do not have any of the applications described above, but you do have a bitmap (.bmp) image to be included in your abstract, you might be interested in a free "bitmap-to-GIF" converter.
  • For more information, read Tips for Making Better Images.

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