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Privacy Terms. ImageMagick Skip to content. Quick links. ImageMagick source code and algorithms are discussed here. Usage questions which are too arcane for the normal user list should also be posted here. See above. Fred's ImageMagick Scripts. But a different order is recommended with current IM versions so that it works for all images : Code: Select all convert -units PixelsPerInch image -density resultimage.
Code: Select all convert -units PixelsPerInch image -resample resultimage. This is new to me. Is it a bug? Code: Select all convert rose: -set units PixelsPerInch -density 75 rose1.
Code: Select all convert -units PixelsPerInch rose1. Code: Select all convert rose1. I would probably have expected something similar with units, in which case order between the two should not matter. However they both probably should be set after reading the image. The problem is that density is also a 'input setting'. That is a global setting that is saved so that vector images can use the value when they are 'rasterized'. As such their use is confusing. That is -density is being dual purposed as both a input setting for images that is created and read in, and as image meta-data modifier operator after images have been read in.
In other words it is more than likely that the two aspects are causing buggy behaviour. ASIDE: It is for this reason that many options such as -label is strictly a input setting only, while -set label is strictly used as a meta-data attribute changing operator! Yes, openEXR assures me that it supports dpi.
Have any of you tried changing the dpi of an EXR image? If you've successfully done it. I would love to see that convert call. Code: Select all magick image -units PixelsPerInch -density resultimage. If you have a raster input, then put -units and -density after the input. If you are converting a vector file to a raster, then put -units and -density before reading the input. But what about mogrify? Mogrify syntax is different since the input is always at the end of the command.
So you have to put -units and -density before the input. However, here are your words: If you have a raster input, then put -units and -density after the input.
Privacy Terms. ImageMagick Skip to content. Quick links. Change DPI while keeping resolution Questions and postings pertaining to the usage of ImageMagick regardless of the interface. Usage questions are like "How do I use ImageMagick to create drop shadows?
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Privacy Terms. ImageMagick Skip to content. Quick links. Usage questions are like "How do I use ImageMagick to create drop shadows?