Apress image magick - download pdf or read online

By Michael Still

ISBN-10: 1590595904

ISBN-13: 9781590595909

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Extra resources for Apress image magick

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Cached) yes checking whether gcc accepts -g... (cached) yes checking for gcc option to accept ANSI C... (cached) none needed checking dependency style of gcc... (cached) gcc3 checking if malloc debugging is wanted... no ... Again, I’ve truncated the output so as to not fill the entire book with command output. I’ll show the last few lines from the output, though, because they’re important: ImageMagick is configured as follows. Please verify that this configuration matches your expectations. qxd 14 11/17/05 3:06 PM Page 14 CHAPTER 1 ■ INSTALLING AND CONFIGURING IMAGEMAGICK LIBS = -lMagick -ltiff -lfreetype -ljpeg -lpng -lXext -lXt -lSM ➥ -lICE -lX11 -lxml2 -lz -lpthread -lm -lpthread CXX = g++ CXXFLAGS = -pthread This dump shows all the features that ImageMagick has found available on your system and is going to enable during the compile.

Figure 2-4. qxd 11/17/05 3:17 PM Page 35 CHAPTER 2 ■ PERFORMING BASIC IMAGE MANIPULATION The set of colored squares to the right of the photo is a close-up of the pixels in the small box on the right side of the photo (near the top of the branches of the tree). You can see that the pixels in the raster image provide only an approximation of what the camera was actually pointed at, because a set number of samples makes up the image. The most important way that this will impact you as a user of images is that raster images are generally larger files on disk and a lot harder to resize.

2 megabytes 1,280×960 784 kilobytes 640×480 280 kilobytes 320×240 112 kilobytes 160×120 56 kilobytes 80×60 36 kilobytes You can also see from Table 2-1 that the advantage of reducing the size of an image in terms of side length compared with file size on disk decreases as the image gets smaller. For example, reducing the side length from 160×120 pixels to 80×60 pixels reduces the size of the file by less than 50 percent, whereas reducing the side length from 2560×1920 to 1280×960 reduces the size of the file by about 70 percent.

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Apress image magick by Michael Still

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