Rob Erdmann (@erdmann) - Twitterプロフィール

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New Year's Resolution: 5 µm The hyper-res image of Rembrandt's Night Watch @Rijksmuseum is now online: hyper-resolution.org/Nightwatch5 97 rows × 87 cols (8 439) @Hasselblad H6D-400c MS images Size: 925 000 px × 775 000 px (717 GP) Res: 5 µm (5080 ppi)

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Rob Erdmann@erdmann·30 Nis

@RembrandtsRoom Thanks for the shout-out! Here's a live link (2013-ish) for those who want to play with it boschproject.org/Morelli/Hand.h… - Click a hand to re-sort. - Shift+click to select. - Type 1-9 to determine viewer column count then right-click to launch a synced viewer with the selection.

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MaaikeDx 🖌@RembrandtsRoom·30 Nis

Bosch hands comparison according to the Morelli / Erdmann method, a method to try to determine authenticity of paintings: by comparing how hands, or for instance ears are painted.

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Rob Erdmann@erdmann·25 Eki

@CryptoBrawnz It's scientific documentation, so no AI scaling. Just very very close photos with robot and a Hasselblad H6D 400 MS. Here's a link to the PyCon 2020 keynote I gave about it: youtube.com/watch?v=z_hm5o…

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Crypto Brawnz@CryptoBrawnz·25 Eki

@erdmann This is amazing was this upscaled with AI and what camera and scanner was used?

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Rob Erdmann@erdmann·12 May

I'm delighted to announce that the composite image of Rembrandt's Night Watch @Rijksmuseum is now online for everyone to enjoy! hyper-resolution.org/Nightwatch 24 rows × 22 cols (528) @Hasselblad H6D-400c MS images Size: 231 250 px × 193 750 px (44.8 GP) Resolution: 20 µm (1270 ppi)

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Rob Erdmann@erdmann·26 Tem

@gregeganSF Ah. I guess it's just an illusion that the lines seem to become increasingly parallel to the parallels even below the equator.

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Greg Egan@gregeganSF·26 Tem

@erdmann It looks identical to the north pole.

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Greg Egan@gregeganSF·26 Tem

[1/6] You’ve probably seen a pattern like this on Christmas decorations or chocolates, but it’s actually a demonstration of a technique I just learned from @ZenoRogue for creating a coordinate system (u,v) on a surface such that moving along a grid line of constant v from

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Rob Erdmann@erdmann·26 Tem

@gregeganSF Cool! These curves have decreasing angles with respect to lines of constant latitude. What does it look like at the south pole?

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Greg Egan@gregeganSF·26 Tem

[6/6] is guaranteed to be 1. The animation uses c ≈ 1.4866, which was chosen to make the curves meet up neatly along the international date line.

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Rob Erdmann@erdmann·17 Ara

@openseadragon Thanks for the mention! I forked OpenSeadragon back in 2012 to enable the things I needed for image comparisons for my boschproject.org website (boschproject.org/view.html?mode…, e.g.), and the fork and OSD have diverged considerably since.

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OpenSeadragon@openseadragon·17 Ara

Here it is in OpenSeadragon on @erdmann's site: hyper-resolution.org/view.html?i=Ri…

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OpenSeadragon@openseadragon·7 Ağu

If you haven't seen the gigantic scan of Rembrandt’s The Night Watch, it's well worth taking a look! It's not displayed with OpenSeadragon (though it certainly could be), but it's a great inspiration for all of us working in the art preservation field 😊

Open Culture@openculture

Explore the New 717-Gigapixel Scan of Rembrandt’s The Night Watch, the Most Detailed Photo Ever Taken of a Work of Art openculture.com/2022/01/explor… via @openculture

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Rob Erdmann@erdmann·6 Oca

@HxxxKxxx @V_and_A @openseadragon @iiif_io Thanks! To be clear, there is only one "Curtain Viewer", not a family tree. These efforts by others to gain reputation/business by copying without credit are academically dishonest and, in the eyes of the Dutch legal system, unlawful. The Curtain Viewer isn't open source yet.

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Harald Klinke @[email protected]@HxxxKxxx·6 Oca

@erdmann @V_and_A @openseadragon @iiif_io It seems there is long genealogy of this viewer. Sorry for the wrong links, the tweet was meant as a demonstration of what is possible in a browser. Respect for what you have accomplished ahead of its time!

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Harald Klinke @[email protected]@HxxxKxxx·6 Oca

Curtain viewer: A viewer based on OpenSeaDragon for comparing image variants, such as multi-spectral imaging, supplied as canvases in a #IIIF manifest. github.com/vanda/curtain-… Example: ➡️cuberis.github.io/openseadragon-… (click on curtain vs. sync) @V_and_A @openseadragon @iiif_io

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Rob Erdmann@erdmann·6 Oca

@HxxxKxxx @V_and_A @openseadragon @iiif_io When the Curtain Viewer was copied (with no credit!), a Dutch court ruled that the way of showing images (the "interface") was so innovative that it was also my copyright (source code too). See web.archive.org/web/2019113007…

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Rob Erdmann@erdmann·6 Oca

@HxxxKxxx @V_and_A @openseadragon @iiif_io The Cuberis and vanda links you shared have nothing to do with my Curtain Viewer.

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Rob Erdmann@erdmann·4 Oca

@kirkmart @rijksmuseum Indeed, when I'm not directly using memmaps in numpy, #pyvips is a big help. @jcupitt65 is very responsive fixing bugs and answering questions too, so it's a delight to be a user. #libvips can process huge images that no other image-processing engine can, and it's really fast.

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Rob Erdmann@erdmann·3 Oca

New Year's Resolution: 5 µm The hyper-res image of Rembrandt's Night Watch @Rijksmuseum is now online: hyper-resolution.org/Nightwatch5 97 rows × 87 cols (8 439) @Hasselblad H6D-400c MS images Size: 925 000 px × 775 000 px (717 GP) Res: 5 µm (5080 ppi)

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Rob Erdmann@erdmann·3 Oca

@Mbussonn [shudder]

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M Bussonnier – Bye Twit.ter@Mbussonn·3 Oca

@erdmann [Sarcasm] Soooo many new potential NFTs. [/sarcasm]

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Rob Erdmann@erdmann·3 Oca

@RousBenjamin @rijksmuseum Also, see here for a thread with more information and several links to a smooth multi-pane viewer: twitter.com/erdmann/status…

Rob Erdmann@erdmann

New Year's Resolution: 5 µm The hyper-res image of Rembrandt's Night Watch @Rijksmuseum is now online: hyper-resolution.org/Nightwatch5 97 rows × 87 cols (8 439) @Hasselblad H6D-400c MS images Size: 925 000 px × 775 000 px (717 GP) Res: 5 µm (5080 ppi)

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Benjamin Rous@RousBenjamin·3 Oca

In 2020 publiceerde het @rijksmuseum een gedetailleerde foto van de Nachtwacht. Maar het kan nóg beter: een door @erdmann samengestelde foto, opgebouwd uit 8430 opnames van 5,5 bij 4,1 centimeter, 717 gigapixels groot. Inzoomen maar! rijksmuseum.nl/nl/stories/ope…

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Rob Erdmann@erdmann·3 Oca

@UvA_Humanities @rijksmuseum Also, see here for a thread with more information and several links to a multi-pane viewer: twitter.com/erdmann/status…

Rob Erdmann@erdmann

New Year's Resolution: 5 µm The hyper-res image of Rembrandt's Night Watch @Rijksmuseum is now online: hyper-resolution.org/Nightwatch5 97 rows × 87 cols (8 439) @Hasselblad H6D-400c MS images Size: 925 000 px × 775 000 px (717 GP) Res: 5 µm (5080 ppi)

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Rob Erdmann@erdmann·3 Oca

Note that this new image is 16 times bigger than the 20 µm resolution image we released in May 2020. twitter.com/erdmann/status…

Rob Erdmann@erdmann

I'm delighted to announce that the composite image of Rembrandt's Night Watch @Rijksmuseum is now online for everyone to enjoy! hyper-resolution.org/Nightwatch 24 rows × 22 cols (528) @Hasselblad H6D-400c MS images Size: 231 250 px × 193 750 px (44.8 GP) Resolution: 20 µm (1270 ppi)

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Rob Erdmann@erdmann·3 Oca

Nearby, an easily resolved smalt (ground cobalt glass) pigment particle: hyper-resolution.org/view.html?mode…

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Rob Erdmann@erdmann·3 Oca

@HxxxKxxx @HiroxEurope Thanks! It's not done with a Hirox, though. It's a Hasselblad H6D 400c MS camera on a 5-axis robot, with a lot of machine learning behind it to ensure sharp color-accurate photos every time.

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Harald Klinke @[email protected]@HxxxKxxx·3 Oca

@erdmann Thumbs up! 👍 #macrophotography #arthistory @HiroxEurope

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Rob Erdmann@erdmann·3 Oca

@soyemecampuzano The PyCon keynote will hopefully answer your questions. If not, I'm happy to answer them here. youtube.com/watch?v=z_hm5o…

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Emiliano Campuzano@campusaint·3 Oca

@erdmann Hey man, just found out about the hyper-resolution project. Really awesome stuff! Do you have a preferred article on the behind the scenes and the way it works? Would love to read it!

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Rob Erdmann

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