![]() ![]() If the ImageMagick libraries cannot be loaded, an error message will display indicating that EMu: Note: Note however that the next upgrade you perform will replace your libraries with the 16 bit versions, so it will be necessary to perform the copy again. Using this technique it is not necessary to set the MAGICK_HOME environment variable. If your organi sation does not want to use the 16 bit libraries and you have a network installation, copy the contents of the 8 bit image directory over the ImageMagick directory under the EMu executable directory. Note: Use this technique to install later releases of the libraries that may support more image formats (although the libraries distributed with EMu will be updated on a regular basis). Now, when EMu loads the ImageMagick libraries it will load those under the specified directory. Click the OK button to save the setting.Enter MAGICK_HOME for the Variable name and set the Variable value to the directory into which ImageMagick was installed:.Under User variables for., click the New button.Click the Environment Variables button.Run Start>Control Panel>System and select the Advanced tab.Be sure to download the DLL version, not the static version. Install the required version of ImageMagick on your local machine or network server.To bypass the libraries distributed with EMu: Note: By doing so however, it will not be possible to view or read 16 bit images. For instance, to halve memory usage and load images 33% faster, it is possible to use the 8 bit ImageMagick libraries. It is possible to take advantage of the MAGICK_HOME environment variable to force EMu to load a different version of the ImageMagick libraries than the ones distributed with EMu. If the environment variable is not set, EMu will look under the executable directory. If it is set, EMu will attempt to load the ImageMagick libraries from the directory specified by the environment variable. In order to locate the libraries EMu first looks up the MAGICK_HOME environment variable. This means that EMu determines where the libraries are installed (in the same directory as the EMu executable by default) and having done so "loads" them into memory. Therefore before manipulating large images, it will be worth confirming that there is sufficient computer memory to manipulate the images.ĮMu loads the ImageMagick libraries dynamically the first time that are required. Note: Unless there is at least 1 Gb of memory installed, a computer will slow down considerably when dealing with such images. If a 5000 pixel by 5000 pixel image is read however, 200 Mb is required (5000 * 5000 * 8 bytes) even if it is a monochrome image! If an image which is 1000 pixels by 1000 pixels is read, the memory required to hold the image is 8 Mb (1000 * 1000 * 8 bytes). Each pixel uses 64 bits or 8 bytes regardless of the number of bits per pixel in the image file. When ImageMagick reads an image it decodes the file format (via a coder) and stores it in an uncompressed pixel format in memory. There is however an overhead associated with providing support for 16 bit images. Note: 8 bit images can be read and manipulated by the 16 bit libraries without any loss of definition. It is to cater for these images that EMu distributes the 16 bit libraries. Previously, most images produced only stored 8 bits of col our information per col our channel, but newer digital devices are now capable of producing 16 bit images that give a greater col our range, resulting in "truer" col our pictures. These libraries are capable of storing 16 bits of col our information per col our channel, that is: Image Filters are used to provide statistical information about images (not used by EMu).īy default EMu installs ImageMagick's 16 bit libraries.For example, IM_MOD_RL_jpeg_.dll is used to read and write JPEG files. Image Reader/Writers is a collection of files used to read and write specific image formats.resizing code, etc.) and Configuration Files contains language specific text and other configuration files. ImageMagick Core Libraries provide the core image functionality (e.g.The libraries do not require any registration with Windows (that is, they are not COM objects). In the case of a standalone installation, they are installed on the local machine. If a network installation is performed, the libraries reside on a server machine in a directory accessible to all client machines. ![]() ![]() The ImageMagick libraries distributed with EMu are stored under the same directory as the program executable. ![]()
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