Rob Erdmann

Full Prof. @UvA_Amsterdam.
On a mission to help the world access, conserve, and understand its cultural heritage.

[Rob Erdmann @erdmann]

New Year's Resolution: 5 µm

The hyper-res image of Rembrandt's Night Watch
@Rijksmuseum is now online:

https://t.co/GDN41XAul7

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)

[Rob Erdmann @erdmann]

@RembrandtsRoom Thanks for the shout-out! Here's a live link (2013-ish) for those who want to play with it
https://t.co/tr8zmsJXnD

- 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.

[Rob Erdmann @erdmann]

@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: https://t.co/GKjIUwe12y

[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!

https://t.co/0tdhAt2msA

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)

[Rob Erdmann @erdmann]

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

[Rob Erdmann @erdmann]

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

[Rob Erdmann @erdmann]

@openseadragon Thanks for the mention! I forked OpenSeadragon back in 2012 to enable the things I needed for image comparisons for my https://t.co/aZtdbDyPWy website (https://t.co/PYPY0BfqH7, e.g.), and the fork and OSD have diverged considerably since.

[Rob Erdmann @erdmann]

@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.

[Rob Erdmann @erdmann]

@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 https://t.co/zrUtWAuL6V

[Rob Erdmann @erdmann]

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

[Rob Erdmann @erdmann]

@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.

[Rob Erdmann @erdmann]

New Year's Resolution: 5 µm

The hyper-res image of Rembrandt's Night Watch
@Rijksmuseum is now online:

https://t.co/GDN41XAul7

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)

[Rob Erdmann @erdmann]

@Mbussonn [shudder]

[Rob Erdmann @erdmann]

@RousBenjamin @rijksmuseum Also, see here for a thread with more information and several links to a smooth multi-pane viewer:

https://t.co/5LLYrmVDfr

[Rob Erdmann @erdmann]

New Year's Resolution: 5 µm

The hyper-res image of Rembrandt's Night Watch
@Rijksmuseum is now online:

https://t.co/GDN41XAul7

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)

[Rob Erdmann @erdmann]

@UvA_Humanities @rijksmuseum Also, see here for a thread with more information and several links to a multi-pane viewer:

https://t.co/cgeR1EXvFP

[Rob Erdmann @erdmann]

New Year's Resolution: 5 µm

The hyper-res image of Rembrandt's Night Watch
@Rijksmuseum is now online:

https://t.co/GDN41XAul7

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)

[Rob Erdmann @erdmann]

Note that this new image is 16 times bigger than the 20 µm resolution image we released in May 2020.
https://t.co/ONPVzUGrGE

[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!

https://t.co/0tdhAt2msA

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)

[Rob Erdmann @erdmann]

Nearby, an easily resolved smalt (ground cobalt glass) pigment particle:

https://t.co/G4gGwlzgtK

[Rob Erdmann @erdmann]

@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.

[Rob Erdmann @erdmann]

@soyemecampuzano The PyCon keynote will hopefully answer your questions. If not, I'm happy to answer them here.

https://t.co/GKjIUwe12y