https://www.arj.no/tags/visual/ Recent content in Visual on ARJ (English) https://www.arj.no/images/_F8A4088_doc6pg1cufjdr42ycbfd0e.jpg https://www.arj.no/images/_F8A4088_doc6pg1cufjdr42ycbfd0e.jpg Hugo -- 0.152.2 en-us Alexander Refsum Jensenius. CC-BY-SA 4.0 Sat, 16 May 2026 18:02:00 +0200 https://www.arj.no/2026/05/16/ai-photography/ Sat, 16 May 2026 18:02:00 +0200 https://www.arj.no/2026/05/16/ai-photography/ AI and photography. Today, I took part in an interesting panel conversation at Fotografiens Hus in Oslo in connection with the exhibition What We Call Real by. https://www.arj.no/2026/04/24/videoviz/ Fri, 24 Apr 2026 00:00:00 +0000 https://www.arj.no/2026/04/24/videoviz/ Video visualisation in the browser. I am at the Movement Computing Conference (MOCO) in Montpellier and have been discussing motion capture and analysis all. https://www.arj.no/2026/03/14/cleaning-up-the-mishmash-cube-svg-image/ Sat, 14 Mar 2026 00:00:00 +0000 https://www.arj.no/2026/03/14/cleaning-up-the-mishmash-cube-svg-image/ Cleaning Up the MishMash Cube SVG Image. Some weeks ago, I wrote about how I modified the SVG image of the MishMash "bubbles". Today, I got around to doing a. https://www.arj.no/2026/02/28/modifying-svg-images/ Sat, 28 Feb 2026 00:00:00 +0000 https://www.arj.no/2026/02/28/modifying-svg-images/ A guide to creating and modifying SVG images programmatically, exploring how to convert complex vector graphics into clean, editable code and add dynamic effects. https://www.arj.no/2026/01/10/videogram-navigation/ Sat, 10 Jan 2026 00:00:00 +0000 https://www.arj.no/2026/01/10/videogram-navigation/ Videograms for Video Navigation. Yesterday, I wrote about some reflections I had during Olgerta Asko's PhD defence. Today, while chopping up the video. https://www.arj.no/2025/12/31/alt-text-ai-generation/ Wed, 31 Dec 2025 00:00:00 +0000 https://www.arj.no/2025/12/31/alt-text-ai-generation/ Automating alt text generation for all blog images. Yesterday, I wrote about how I cleaned up a lot of old mess here on this blog. This made me realize that I. https://www.arj.no/2025/12/28/audiovisual/ Sun, 28 Dec 2025 00:00:00 +0000 https://www.arj.no/2025/12/28/audiovisual/ In this blog post, I advocate for avoiding the ambiguous term 'audiovisual' and instead using 'audio–video' for media and 'auditory–visual' for perception. https://www.arj.no/2025/12/19/ai-realistic-photos/ Fri, 19 Dec 2025 00:00:00 +0000 https://www.arj.no/2025/12/19/ai-realistic-photos/ AI-realistic Photos. One of my MUS2640 students asked which AI tool I had used to create the illustration on top of the textbook I have been developing for the. https://www.arj.no/2024/11/29/exif-renaming/ Fri, 29 Nov 2024 00:00:00 +0000 https://www.arj.no/2024/11/29/exif-renaming/ Renaming image files with date and time. In this post I write about how it is possible rename all the photos in a folder based on the date and time information. https://www.arj.no/2023/09/26/which-image-format-should-i-use/ Tue, 26 Sep 2023 00:00:00 +0000 https://www.arj.no/2023/09/26/which-image-format-should-i-use/ Which image format should I use?. Many image file formats exist, but which ones are better for what task? Here is a quick overview in my little series of PhD. https://www.arj.no/2023/08/07/transparent-circles/ Mon, 07 Aug 2023 00:00:00 +0000 https://www.arj.no/2023/08/07/transparent-circles/ Making image parts transparent in Python. As part of my year-long StillStanding project, I post an average image of the spherical video recordings on Mastodon. https://www.arj.no/2023/07/05/videogram-averaging/ Wed, 05 Jul 2023 00:00:00 +0000 https://www.arj.no/2023/07/05/videogram-averaging/ Horizontal and Vertical Averaging is not the same. For my year-long StillStanding project I am generating videograms for all the scenes. Since there is not. https://www.arj.no/2023/05/20/skipping-frames/ Sat, 20 May 2023 00:00:00 +0000 https://www.arj.no/2023/05/20/skipping-frames/ The effect of skipping frames for video visualization. I have been exploring different video visualizations as part of my annual stillstanding project. Some of. https://www.arj.no/2023/05/10/musique-de-table/ Wed, 10 May 2023 00:00:00 +0000 https://www.arj.no/2023/05/10/musique-de-table/ Visualization of Musique de Table. Musique de Table is a wonderful piece written by Thierry de Mey. I have seen it performed live several times, and here came. https://www.arj.no/2023/04/01/visualizing-360-photos/ Sat, 01 Apr 2023 00:00:00 +0000 https://www.arj.no/2023/04/01/visualizing-360-photos/ Making 2D Images from 360-degree Videos. For my annual Still Standing project, I am recording 360 videos with audio and sensor data while standing still for 10. https://www.arj.no/2022/12/21/libreoffice-draw-scripting/ Wed, 21 Dec 2022 00:00:00 +0000 https://www.arj.no/2022/12/21/libreoffice-draw-scripting/ Scripting image exports with LibreOffice Draw. As mentioned yesterday, the source files for the illustrations in my Sound Actions book are available on GitHub. https://www.arj.no/2022/12/14/unused-images/ Wed, 14 Dec 2022 00:00:00 +0000 https://www.arj.no/2022/12/14/unused-images/ Cleaning up image folders on my blog. I am still in the process of transitioning my blog from WordPress to Hugo. The content has been moved, but I see that. https://www.arj.no/2022/09/18/convert-heic-photos-to.jpg/ Sun, 18 Sep 2022 00:00:00 +0000 https://www.arj.no/2022/09/18/convert-heic-photos-to.jpg/ Convert HEIC photos to JPEG. A quick note-to-self about how I managed to download a bunch of photos from an iPhone and convert them to.jpg on my laptop running. https://www.arj.no/2022/07/17/mountain-walking/ Sun, 17 Jul 2022 00:00:00 +0000 https://www.arj.no/2022/07/17/mountain-walking/ Video visualizations of mountain walking. After exploring some visualizations of kayaking, I was eager to see how a similar approach could work for walking. On. https://www.arj.no/2022/06/16/export-images-from-a-pdf-file/ Thu, 16 Jun 2022 00:00:00 +0000 https://www.arj.no/2022/06/16/export-images-from-a-pdf-file/ Export images from a PDF file. I have previously written about how to export each of the pages of a PDF file as an image. That works well for, for example. https://www.arj.no/2022/04/13/resizing-image-folder/ Wed, 13 Apr 2022 00:00:00 +0000 https://www.arj.no/2022/04/13/resizing-image-folder/ Programmatically resizing a folder of images. This is a note to self about how to programmatically resize and crop many images using ImageMagick. It all. https://www.arj.no/2021/06/15/video-poster-images/ Tue, 15 Jun 2021 00:00:00 +0000 https://www.arj.no/2021/06/15/video-poster-images/ Making 100 video poster images programmatically. We are organizing the Rhythm Production and Perception Workshop 2021 at RITMO a week from now. Like many other. https://www.arj.no/2021/02/04/bach-prelude/ Thu, 04 Feb 2021 00:00:00 +0000 https://www.arj.no/2021/02/04/bach-prelude/ Visualising a Bach prelude played on Boomwhackers. I came across a fantastic performance of a Bach prelude played on Boomwhackers by Les Objets Volants. https://www.arj.no/2021/01/02/create-timelapse-video-from-images-with-ffmpeg/ Sat, 02 Jan 2021 00:00:00 +0000 https://www.arj.no/2021/01/02/create-timelapse-video-from-images-with-ffmpeg/ Create timelapse video from images with FFmpeg. I take a lot of timelapse shots with a GoPro camera. Usually, I do this with the camera's photo setting instead. https://www.arj.no/2020/11/06/ffmpeg-tblend/ Fri, 06 Nov 2020 00:00:00 +0000 https://www.arj.no/2020/11/06/ffmpeg-tblend/ Visual effect of the different tblend functions in FFmpeg. FFmpeg is a fantastic resource for doing all sorts of video manipulations from the terminal. https://www.arj.no/2020/09/08/chimpanzee-motiongrams/ Tue, 08 Sep 2020 00:00:00 +0000 https://www.arj.no/2020/09/08/chimpanzee-motiongrams/ Motiongrams of rhythmic chimpanzee swaying. I came across a very interesting study on the Rhythmic swaying induced by sound in chimpanzees. The authors have. https://www.arj.no/2020/03/20/pixel-array-images-of-long-videos-in-ffmpeg/ Fri, 20 Mar 2020 00:00:00 +0000 https://www.arj.no/2020/03/20/pixel-array-images-of-long-videos-in-ffmpeg/ Pixel array images of long videos in FFmpeg. Continuing my explorations of FFmpeg for video visualization, today I came across this very nice blog post on. https://www.arj.no/2020/02/21/image-masks/ Fri, 21 Feb 2020 00:00:00 +0000 https://www.arj.no/2020/02/21/image-masks/ Creating image masks from video file. As part of my exploration in creating multi-exposure keyframe image displays with FFmpeg and ImageMagick, I tried out a. https://www.arj.no/2020/02/21/keyframe-displays/ Fri, 21 Feb 2020 00:00:00 +0000 https://www.arj.no/2020/02/21/keyframe-displays/ Creating multi-exposure keyframe image displays with FFmpeg and ImageMagick. While I was testing visualization of some videos from the AIST database earlier. https://www.arj.no/2020/02/21/aist-visualizations/ Fri, 21 Feb 2020 00:00:00 +0000 https://www.arj.no/2020/02/21/aist-visualizations/ Visualizing some videos from the AIST Dance Video Database. Researchers from AIST have released an open database of dance videos, and I got very excited to try. https://www.arj.no/2020/01/24/motiongram-of-high-speed-violin-bowing/ Fri, 24 Jan 2020 00:00:00 +0000 https://www.arj.no/2020/01/24/motiongram-of-high-speed-violin-bowing/ Motiongram of high-speed violin bowing. I came across a high-speed recording of bowing on a violin string today, and thought it would be interesting to try to. https://www.arj.no/2019/11/29/pdf-to-images/ Fri, 29 Nov 2019 00:00:00 +0000 https://www.arj.no/2019/11/29/pdf-to-images/ Creating individual image files from presentation slides. How do you create full-screen images from each of the slides of a Google Docs presentation without. https://www.arj.no/2019/05/19/rotate-lots-of-image-on-ubuntu/ Sun, 19 May 2019 00:00:00 +0000 https://www.arj.no/2019/05/19/rotate-lots-of-image-on-ubuntu/ Rotate lots of image on Ubuntu. I often find myself with a bunch of images that are not properly rotated. Many cameras write the rotation information to the. https://www.arj.no/2018/11/25/sort-images/ Sun, 25 Nov 2018 00:00:00 +0000 https://www.arj.no/2018/11/25/sort-images/ Sort images based on direction (portrait/landscape). I have lots and lots of photos on my computer (and servers!). Sometimes I have a pile of photos of which I. https://www.arj.no/2016/09/07/smc2016/ Wed, 07 Sep 2016 00:00:00 +0000 https://www.arj.no/2016/09/07/smc2016/ New SMC paper: Optical or Inertial? Evaluation of Two Motion Capture Systems for Studies of Dancing to Electronic Dance Music. My colleague Ragnhild Torvanger. https://www.arj.no/2013/08/01/smc2013/ Thu, 01 Aug 2013 00:00:00 +0000 https://www.arj.no/2013/08/01/smc2013/ New publication: Non-Realtime Sonification of Motiongrams. Today I will present the paper Non-Realtime Sonification of Motiongrams at the Sound and Music. https://www.arj.no/2013/06/26/timelapse/ Wed, 26 Jun 2013 00:00:00 +0000 https://www.arj.no/2013/06/26/timelapse/ Visualisations of a timelapse video. Yesterday, I posted a blog entry on my TimeLapser application, and how it was used to document the working process of the. https://www.arj.no/2013/04/06/imagesonifyer/ Sat, 06 Apr 2013 00:00:00 +0000 https://www.arj.no/2013/04/06/imagesonifyer/ ImageSonifyer. Earlier this year, before I started as head of department, I was working on a non-realtime implementation of my sonomotiongram technique (a. https://www.arj.no/2012/07/12/motiongrams-smc/ Thu, 12 Jul 2012 00:00:00 +0000 https://www.arj.no/2012/07/12/motiongrams-smc/ Paper #1 at SMC 2012: Evaluation of motiongrams. Today I presented the paper Evaluating how different video features influence the visual quality of resultant. https://www.arj.no/2012/05/06/visual-overviews-in-ms-academic-search/ Sun, 06 May 2012 00:00:00 +0000 https://www.arj.no/2012/05/06/visual-overviews-in-ms-academic-search/ Visual overviews in MS Academic Search. I have been using Google Scholar as one of my main sources for finding academic papers and books, and find that is has. https://www.arj.no/2012/02/03/sonification/ Fri, 03 Feb 2012 00:00:00 +0000 https://www.arj.no/2012/02/03/sonification/ Sonification of motiongrams. A couple of days ago I presented the paper "Motion-sound Interaction Using Sonification based on Motiongrams" at the ACHI 2012. https://www.arj.no/2011/08/05/flickr-introduces-long-photos/ Fri, 05 Aug 2011 00:00:00 +0000 https://www.arj.no/2011/08/05/flickr-introduces-long-photos/ Flickr introduces long photos. Flickr has opened for uploading videos, or, rather, what they call "long photos". As such, they are not trying to compete with. https://www.arj.no/2011/07/16/image-size/ Sat, 16 Jul 2011 00:00:00 +0000 https://www.arj.no/2011/07/16/image-size/ Image size. While generating the videograms of Bergensbanen, I discovered that Max/Jitter cannot export images from matrices that are larger than 32767 pixels. https://www.arj.no/2011/07/13/videogram-and-motiongram/ Wed, 13 Jul 2011 00:00:00 +0000 https://www.arj.no/2011/07/13/videogram-and-motiongram/ Difference between videogram and motiongram. For some upcoming blog posts on videograms, I will start by explaining the difference between a motiongram and a. https://www.arj.no/2011/07/13/videogram-of-bergensbanen/ Wed, 13 Jul 2011 00:00:00 +0000 https://www.arj.no/2011/07/13/videogram-of-bergensbanen/ Videogram of Bergensbanen. While on paternity leave, I (finally) have time to do small projects that require little brain activity and lots of computation. https://www.arj.no/2010/11/09/sonification-of-motiongrams/ Tue, 09 Nov 2010 00:00:00 +0000 https://www.arj.no/2010/11/09/sonification-of-motiongrams/ Sonification of motiongrams. I have made a new Jamoma module for sonification of motiongrams called jmod.sonifyer\. From a live video input, the program. https://www.arj.no/2010/07/02/motiongram/ Fri, 02 Jul 2010 00:00:00 +0000 https://www.arj.no/2010/07/02/motiongram/ New motiongram features in Jamoma, inspired by Daniel Crooks, for visualizing human motion over time in music and dance research, teaching, and analysis. https://www.arj.no/2010/06/15/video-or-photo/ Tue, 15 Jun 2010 00:00:00 +0000 https://www.arj.no/2010/06/15/video-or-photo/ What to bring for a conference: Video camera or photo camera. In terms of quality the best thing to do for documentation is to bring your big SLR, your big HD. https://www.arj.no/2008/06/11/motiongrams-synced-to-spectrograms/ Wed, 11 Jun 2008 00:00:00 +0000 https://www.arj.no/2008/06/11/motiongrams-synced-to-spectrograms/ Motiongrams sync'ed to spectrograms. One of my reasons for developing motiongrams was to have a solution for visualising movement in a way that would be. https://www.arj.no/2008/02/13/motiongrams-in-eyesweb/ Wed, 13 Feb 2008 00:00:00 +0000 https://www.arj.no/2008/02/13/motiongrams-in-eyesweb/ Motiongrams in EyesWeb!. We had a programming session this morning, and Paolo Coletta implemented a block for creating motiongrams in EyesWeb. It will be. https://www.arj.no/2007/02/15/tag-clouds/ Thu, 15 Feb 2007 00:00:00 +0000 https://www.arj.no/2007/02/15/tag-clouds/ Tag Clouds. TagCrowd is an online tool for creating tag clouds from any text to visualize word frequency. Tag clouds have become popular on Flickr and a number. https://www.arj.no/2007/01/29/optical-illusions-and-visual-phenomena/ Mon, 29 Jan 2007 00:00:00 +0000 https://www.arj.no/2007/01/29/optical-illusions-and-visual-phenomena/ Optical Illusions and Visual Phenomena. Talking about optical illusions, here's a bunch of them. Great that many of them are made as javascripts so that the. https://www.arj.no/2006/11/01/motiongrams/ Wed, 01 Nov 2006 00:00:00 +0000 https://www.arj.no/2006/11/01/motiongrams/ Motiongrams. Challenge Traditional keyframe displays of videos are not particularly useful when studying single-shot studio recordings of music-related. https://www.arj.no/2006/09/19/inhabitat/ Tue, 19 Sep 2006 00:00:00 +0000 https://www.arj.no/2006/09/19/inhabitat/ Photonic textiles. Philips Research is currently showing off a their new Photonic Textiles at the IFA Consumer Electronics Fair in Berlin. The Photonic Fabric. https://www.arj.no/2006/08/02/microsoft-live-labs-photosynth/ Wed, 02 Aug 2006 00:00:00 +0000 https://www.arj.no/2006/08/02/microsoft-live-labs-photosynth/ Microsoft Live Labs: Photosynth. Researchers at Microsoft Live Labs are working on Photosynth based on Photo Tourism from the University of Washington. By. https://www.arj.no/2006/05/20/sonic-visualiser/ Sat, 20 May 2006 00:00:00 +0000 https://www.arj.no/2006/05/20/sonic-visualiser/ Sonic Visualiser. {.imagelink}Sonic Visualiser from Queen Mary's is yet another software tool for visualizing audio content. However, there are some features. https://www.arj.no/2006/04/28/live-images-on-bjorks-medulla-web-page/ Fri, 28 Apr 2006 00:00:00 +0000 https://www.arj.no/2006/04/28/live-images-on-bjorks-medulla-web-page/ Live images on björk's MEDÚLLA web page. There are some simple gif animations that start playing when you hover over some of the images on björk's MEDÚLLA web. https://www.arj.no/2004/11/28/working-with-time-and-space-in-images-chessboard-studies/ Sun, 28 Nov 2004 00:00:00 +0000 https://www.arj.no/2004/11/28/working-with-time-and-space-in-images-chessboard-studies/ Working with time and space in images: Chessboard Studies. I have been taking photographs for many years, and I wanted to see how I could develop this a little.