Let's say you have 500 JPG images and want to convert them all to PNG in one go. The mogrify function in the ImageMagick software suite comes in handy here:
mogrify -format png *.jpg
This produces a copy of each image in the new format. It's possible to combine the conversion with other operations, for example resizing and conversion to monochrome:
mogrify -resize 50% -monochrome -format png *.jpg
I often create PDF vector graphics which I use together with PDFLaTeX. However, sometimes I need bitmap versions of the vector graphics images. Mogrify can convert from PDF to bitmap formats (for example PNG), but it's important to set the density of the sampling grid in the conversion (dots per inch), otherwise the bitmap image might have a too low resolution. Example:
mogrify -format png -density 600 *.pdf
The commands above can be executed directly in the terminal if you are inside the folder containing the images. The folder can also be specified explicitly, for example
mogrify -format png /home/martin/images/*.jpg
Monday, 20 February 2012
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2 comments:
how to do you point to the target directory. For example, I have a folder with png images that i want to convert to jpg...how would i do that?
I have updated the post to include an answer to your question. Thanks for the feedback!
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