Optimize a van shelf
A few weeks ago, I discovered the tiny world of tiny houses and camping-vans and found that quite amazing. However, the current commercial camping vans look pretty sub-optimal to me, because they are...
View ArticleAnalyse the heat losses of a Sprinter van
L’article Analyse the heat losses of a Sprinter van est apparu en premier sur Aurélien PIERRE Engineering.
View ArticleMake Jupyter Notebooks easy to blog in WordPress
I have struggled with most solutions to convert and embed Jupyter notebooks into WordPress blog posts since I use Plotly as a graphic lib, as well as many LaTeX equations and images. Finally, I had to...
View ArticleWeb design and no-coding CMS : are we going the right way ?
I have been using WordPress as a CMS (content management system) for almost 10 years now. When I dug into it, I knew nothing about PHP, SQL, CSS, programmation and servers. That was one year after I...
View ArticleFilmic, darktable and the quest of the HDR tone mapping
Abstract darktable is an open-source software for raw photographs management and processing developped since 2009 for Linux desktops. Since then, it has been ported on Mac OS and Windows 7, 8, 10....
View ArticleDerivating HDR-IPT direct and inverse transformations
Following my work on the filmic tonemapping, several users have reported issues with very saturated blue areas (stage spotlights, bright skies) and red areas. The grail of image processing is being...
View ArticleBilinear interpolation on images stored as Python Numpy ndarray
If you are working in image processing and using Python as a prototyping script language to test algorithms, you might have noticed that all the libs providing fast image interpolation methods (to...
View ArticleThe designer and the drilling machine
There is a parabola I came up with a few years ago, about design and engineering, and it seems to fulfil its purpose quite well, so I though I might share it here.As a designer, your job is to match...
View ArticleImage processing does not kill people… and it’s a shame
Among the technical fields, quite a few have the potential to harm the public : the first that come to mind are medicine and civil engineering. Both have in common their scientific basis : studies,...
View ArticleRotation-invariant Laplacian for 2D grids
NOTE : this article is a work in progress and not finished yet. ## Introduction The Laplacian operator $\Delta u$ is the divergence of the second-order partial derivative $\nabla^2 u$ of a multivariate...
View ArticleThe sRGB book of color
This page is inspired by the Munsell book of color. It aims at showing the sRGB gamut volume (all the visible colors that can be encoded as sRGB triplets), projected into a perceptually uniform...
View ArticleWebP is so great… except it’s not
I'm a responsible web designer, and as such, since WordPress (finally) accepts media uploads of `image/webp` MIME type and since **all** [web browsers](https://caniuse.com/webp) newer than september...
View ArticleColor saturation control for the 21th century
The saturation control of pretty much all image processing software is an unfortunate misnomer, to say the least. It actually controls either the chroma in Ych-like spaces (computed from CIE Yxy 1931,...
View ArticleOpen source and professional photography : lies and wishes
There is one thing you will find on the home page of pretty much any open source (call it *libre* or *free* if you will, those lines are blurred) image editing software : the promise that it is,...
View ArticleInterpolating (hue) angles
## The problem to solve In image processing, retouchers may want to apply a saturation boost on specific hues only. Typically, uniform saturation corrections follow a basic linear transfer function...
View ArticleDesign by committee will not save FLOSS
The opensource ecosystem is keen on its mantras. One of them is that being an opensource dev/maintainer is a thankless unpaid job. And while that may sound like a selfless act of benevolence, there is...
View ArticleYou need to reinvent the wheel all the time
There is this mantra that I have been hearing too much in my life : "don't reinvent the wheel". People mean that as a metaphor trying to discourage you from redoing something that is already done, and...
View ArticleWho are the darktable users in 2020 ?
The core basics of design are to know for whom you design, that is who are the users of your solution, what they expect and what they need. It is also necessary to assess if the actual user of your...
View ArticleWebsites suck.
I have spent the past month working on an AI-based search engine. When you go on darktable sub-Reddit, you will find the question "why do lighttable's thumbnails look different from darkroom preview"...
View ArticleStochastic photographic grain synthesis from crystallographic structure...
The silver halide film grain has an unique look that introduces some texture in smooth image areas, where digital imagery may look synthetic and too clean. Emulating this effect in digital photography...
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