Inkscape on Michael’s Domain

How to install the color-blind-safe Nature Color Palette in Inkscape

Wed, 28 Jan 2026 00:00:00 +0000

This one is short and easy on Linux. For instructions how to install this color palette on Windows or macOS, please visit https://github.com/atsuyaw/NatureColorPalette .

Images for talks and illustrations

Mon, 09 Sep 2024 00:00:00 +0000

I promised in January to list websites where you can find free images ( free as in beer and free as in speech ). And then I forgot about the promise. Since I mostly use Inkscape to draw illustrations, I normally search for SVG images. Inkscape is an open-source software that generates vector graphics. SVG is not only the web standard for vector graphics but also the native file format for Inkscape. Sometimes, PNG or JPEG images are also acceptable if they can be easily converted into SVG images (e.g., silhouettes). Occasionally, I look for 3D images (“models”), and then I prefer them in Blender format (the only 3D software that I have used more than just a few times).There are two different types of free images on the web: Public Domain and Creative Commons . Public Domain images can be used without restrictions, while Creative Commons images typically come with some restrictions. The most common restriction for CC-licensed images is that you need to credit the creator. Sometimes, there are additional restrictions, such as prohibiting commercial use or modifications.When you do an image search with Google or DuckDuckGo , you can restrict the view to images that conform to a specific license. However, Google and DuckDuckGo cover only a fraction of the internet, and there are search sites that have specialized in searching for specific images.You may also ask AI to generate the perfect image. It typically requires several iterations to get something useful, and you will never be able to get copyrights for the image, even though you spent hours engineering the perfect prompt. You can try e.g., DALL·E 3 , or you can even run some AI image generators on your own computer like Stable Diffusion . The image above was generated with DALL·E 3, using the following prompt: “A person surrounded by images, symbolizing the search for the perfect image.”

Why you should not use BioRender

Wed, 17 Jan 2024 00:00:00 +0000

About two years ago, our university started subscribing to an institutional plan for BioRender . BioRender is a browser-based scientific illustration software with a large library of pre-made items, including complex illustrations. It allows you to illustrate scientific concepts quickly or to make flow charts for your experimental setups. And given how easy it is to use, the results look rather slick. It’s like the McDonald’s of scientific illustration. It’s fast and gets the job done. Sure, the food in a 3-star Michelin restaurant tastes much better, but most of us rarely can afford that luxury.Why should you not use it despite all of the advantages mentioned above?

Poster printing without an A0 printer

Thu, 15 May 2014 00:00:00 +0000

I failed to prepare my poster for the GRC conference on Molecular Mechanisms in Lymphatic Function & Disease in time. The A0 printer from UNIGRAFIA is not available on weekends. Hence the best I could do is to print it out on A3 and stitch it together. A definite advantage is that I do not have to run around with these ridiculously large poster tubes, that identify you as a Science nerd from half a mile distance.Unfortunately, the only application that can decently split a DIN A0 PDF into separate pages on the fly while printing is the full version of Acrobat. I tried out other options: pdfposter did a fairly good job, but it did not manage with the background: pdfposter -mA3 -pA0 input.pdf output.pdf Pdfposter also doesn’t create overlaps. A solution, that always should work is to convert the PDF into an image (convert -density 150 input.pdf output.png) and then use PosteRazor to create individual PDF files from that image. However, conversion of a A0 pdf into a high res image can last hours. Use a .png file! PosteRazor refused to work on a 60 MB TIF file. The background gradient conversion results in visible colour steps. In order to avoid that, you would have to define the background gradient as an image rather than a vector element. Otherwise PosteRazor worked well; unlike in pdfposter you can define overlaps for the assembly.I have been using Inkscape to prepare my poster and usually I export it from there as a PDF file. This did not work this time because the program consistently crashed during the export. Hence I tried to save it as an encapsulated postscript file and to distil it into a PDF. When exporting from Inkscape (actually it is “Save as”), I selected the following options:Postscript level 3Rasterize filter effects: yesResolution for rasterisation: something between 150 to 300Export area is page: yesAfter distilling it, I printed it from Acrobat Pro with the following options: Page setup: DIN A3, portrait orientationPage scaling: Tile large pagesAt a tile scale of 95% and an overlap of 10mm I got 9 pages (3x3), which is still OK for assembly.