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    GIMP comes with standard filters that supports creating gradients; look under Filters+Light After you’re done with your image, you can export it in PNG format. One of the most common uses for GIMP, is to prepare images for web sites. To export an image with transparent areas that do not have a soft transition. Most of the file formats that GIMP can open, can also be used for saving. Exporting an image does not modify the image itself, so you do not lose anything by.

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    GIMP is capable of reading and writing a large variety of graphics file formats. Thus, it is relatively easy to extend GIMP to support new file types when the need arises. The leading asterisk indicates that this file has been changed. To save this image in a format other than XCF, you must use Export. When you are finished working with an image, you will want to save the results. In fact, it is often a good idea to save at intermediate stages too: GIMP is a pretty robust program, but we have heard rumors, possibly apocryphal, that it may have been known on rare and mysterious occasions to crash.

    Most of the file formats that GIMP can open, can also be used for saving. There is one file format that is special, though: There are several commands for saving images.

    A list, and information on how to use them, can be found in the section covering the File Menu. GIMP allows you to export the images you create in a wide variety of formats. It is important to realize that the only format capable of saving all of the information in an image, including layers, transparency, etc. Every other format preserves some image properties and loses others. It is up to you to understand the capabilities of the format you choose.

    Exporting an image does not modify the image itself, so you do not lose anything by exporting. When you close an image possibly by quitting GIMPyou are warned if the image is “dirty”; that is, if it has been changed without subsequently being saved an asterisk is in front of the image name. Saving an image in any file format will cause the image to be considered “not dirty”, even if the file format does not represent all of the information from the image.

    The GIF file format does not support some basic image properties such as print resolution. If you care for these properties, use a different file format like PNG. Checking interlace allows an image on a web page to be progressively displayed as it is downloaded. Progressive image display is useful with slow connection speeds, gimo you can stop an image that is of no interest; interlace is of less use today with our faster connection speeds.

    When this eskport is checked, the animation will play repeatedly until you stop it. You can set the delay, in milliseconds, between frames if it has not been set before. In this case, you can modify every delay in the Layer Dialog.

    If this has not been set before, you can set how frames will be superimposed. You can select among three options:. Layers will overwrite what is beneath. One frame per layer replace: JPEG files usually have an extension.


    It is a very widely used format, because it compresses ekspoft very efficiently, eksoort minimizing the loss of image quality. No other format comes close to achieving the same level of compression. It does not, however, support transparency or multiple layers.

    The JPEG algorithm is quite complex, and involves a bewildering number of options, whose meaning is beyond the scope of this documentation. Unless you are a JPEG expert, the Quality parameter is probably the only one you will need to adjust.

    When you save a file in JPEG format, a dialog is displayed that allows you to set the Quality level, which ranges from 0 to Values above 95 are generally not useful, though. The default quality of 85 usually produces excellent results, but in many cases it is possible to set the quality substantially lower without noticeably degrading the image. Please note, that the numbers for the JPEG quality level have a different meaning in different applications.

    Saving with a quality level of 80 in GIMP is not necessarily comparable with saving with a quality level of 80 in a different application. Checking this option causes each change in quality or any other JPEG parameter to be shown in the image display. This does not alter the image: If you enable this option, the optimization of entropy gim parameters will be used.

    The result gip typically a smaller file, but it takes more time to generate. With this option enabled, the image chunks are stored in the file in an order that allows progressive image refinement during a slow connection web download. Unfortunately, the progressive option produces slightly larger JPG files than without the progressive option. EXIF data provides information about the image such as eksoort make and model, image size, image date, etc. The EXIF data is not altered in any way when you ekslort this.

    The EXIF data may indicate things such as image creation time and file name, which may no longer be correct. This option lets you save a thumbnail with the image. Many applications use the small fksport image as a quickly available small preview image. If you enable this option, the meta data of the image is saved in an XMP -structure within the file. If you have only made a few changes to the image, then re-using the same quality setting will give you almost the same quality and file size as the original image.

    This will minimize the losses caused by the quantization step, compared to what would happen if you used different quality setting. This ensures that you always get at least the minimum quality specified in your defaults.

    If you did not make major changes to the image and you want to save it using the same quality as the original, then you can do it by enabling this option. JPG compression creates artifacts. By using this option, you can di the image when saving, reducing them. But ekspoft image becomes somewhat blurred. The image file can include wksport which allow the image to be loaded as segments. If a connection is broken while loading the image in a web page, loading can resume from the next marker.

    The human eye is not sensitive in the same way over the entire color spectrum. The compression can use this to treat slightly different colors that the eye perceives as very close, as identical colors.

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    Three methods are available:. Commonly referred to as 4: This is the standard subsampling, which usually provides a good ratio between image quality and file size.

    There are situations, however, in which using no subsampling 4: This suits images with weak borders but tends to denature colors. The float method is very slightly more accurate than the integer method, but is much slower unless gmip machine has very fast floating-point hardware. Also note that the results of the floating-point method may vary slightly across machines, while the integer methods should give the same results everywhere.

    The fast integer method is much less accurate than the other two. In this text box, you can enter a comment which is saved with the image. If your ekspodt has many transparency levels, the Internet browsers that recognize only two levels, will use the background color of your Toolbox instead.

    Internet Explorer up to version fimp did not use this information. Gamma correction is the ability to correct for differences in how computers interpret color ekaport. This saves gamma information in the PNG that reflects the current Gamma factor for your display.

    Viewers on other computers can then compensate to ekspport that the image is not too dark or too bright. Unfortunately, PNG offset support in GIMP is broken, or at least is not compatible with other applications, and has been for a bimp time.

    Do not enable offsets, let GIMP flatten the layers before saving, and you will have no problems. You vo read this comment in the Image Properties. When this option is checked, the color values are saved even if the pixels are completely transparent.

    But this is possible only with a single layer, not with a merged composition.

    Chapter 6. Getting Images out of GIMP

    When a multi-layer image gets exported to a single-layer file format, there is no way GIMP could preserve the color values in the transparent pixels. Since compression is not lossy, the only reason to use a compression level less than 9, is if it takes too long to compress a file on a slow computer. Nothing to fear from decompression: Click to save the current settings. Latter, you can use Load Defaults to load the saved settings. The PNG format supports indexed images.

    A byte allows colors. Reducing the number of colors below is not useful: Please note, that this is not necessary for InternetExplorer 7 and above.

    Exporting a PDF From GIMP

    This option allows you to specify the algorithm used to ekport the image. This is old, but efficient and fast. A PackBits data stream consists of packets of one byte of header followed by data. These options can only be selected, if the image is in indexed mode and reduced to two colors.

    With this option the color values are saved even if the pixels are completely transparent. In this text box, you can enter a comment that is associated with the image. The main problem is that Konqueror is the only Web himp that recognizes the MNG animation format.

    Table of Contents 1.

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