Hamamatsu NDPI Slides in the Browser
Open the slides your Hamamatsu NanoZoomer saves, as they are. Nothing to convert, nothing to upload. A large slide starts showing right away, because the viewer reads only the part you look at.
How It Opens
- One file on your disk, in any browser. Drop it on the viewer, or click Open Image and Choose File. See Local Files.
- A folder of slides, in Chrome and Edge. One slide opens, several show a list. See Local Files.
- An address:
https://,s3://orgs://. Paste it under Open Image. See Remote URLs. - Private data, with a private link or a token. See Private Images and Slides.
What You Will See
- The slide. Zoom from the whole slide down to single cells.
- Very large slides. Slides over 4 GB open.
- Colour profile. A slide that carries its scanner's colour profile is drawn with it. ICC in the RGB settings turns it off. See Channels.
- Macro. It appears under the title. Click it to enlarge it, and turn it if it arrives sideways. A label may show patient details. The viewer shows it and never saves or sends it.
- Z-stacks. The first plane opens, with a note.
- Pixel size and magnification. Both come from the slide, so measurements read in µm and the zoom bar shows the objective. To set your own, see Pixel Size and Magnification.
If a Slide Does Not Open
The viewer tells you why.
| What the file has | What the viewer says |
|---|---|
| Fluorescence | This NDPI file is a fluorescence slide. The viewer cannot read it yet. |
| Another compression | This NDPI file uses a compression the viewer cannot read yet. |
| Not a Hamamatsu file | This file is not a Hamamatsu NDPI file. |
| A damaged or incomplete file | This NDPI file looks damaged or incomplete. |
Annotations
Import GeoJSON, OME-XML or NDP.view .ndpa files, and export GeoJSON or OME-XML, from the Annotations panel. Send a link that opens the slide with its annotations. Exchanging Annotations shows how. To draw, measure and label shapes on the slide, see Annotations.
Public Slides to Try
OpenSlide shares test slides in its Hamamatsu folder. Download a slide, then drop it on the viewer. They are CC0.
For Your IT Team
To open a slide by address, the server must answer byte-range requests and allow them through CORS. For a bucket, allow GET and the Range header in its CORS rules. What the Server Needs has the details.
When a server cannot send parts of a file, the viewer says so. Download the slide and open it from your computer.
Addresses that start with s3:// and gs:// work too.
Image credits
The screenshot uses CMU-2.ndpi from the OpenSlide test data, CC0. See Sample Data and Credits.
Privacy
The slide is read in your browser. Opening one counts as one opened image of the kind "Hamamatsu NDPI file". The file name and address are never recorded. See the privacy policy.
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