Methods and apparatus for imaging a specimen container and/or specimen using multiple exposures

1. A method of imaging a specimen container and/or specimen, comprising:

providing a specimen container containing a specimen at an imaging location;

providing one or more cameras configured to capture images at the imaging location;

providing one or more light panel assemblies adjacent to the imaging location;

illuminating the imaging location with the one or more light panel assemblies; and

capturing multiple images including:

specimen images of the imaging location at multiple different exposures, with the specimen container and specimen being present at the imaging location.

2. The method of claim 1 , wherein the specimen images are captured while being sequentially illuminated by multiple different spectra.

3. The method of claim 1 , wherein the capturing multiple images includes capturing multiple spectral reference images of the image location without the specimen container and specimen being present thereat.

4. The method of claim 3 comprising selecting optimally-exposed pixels from the multiple spectral reference images at multiple different exposures and normalizing to a selected optimal exposure time.

5. The method of claim 1 , wherein the capturing multiple images includes capturing multiple dark reference images of the image location without the specimen container and specimen being present thereat, and with the one or more light panel assemblies being turned off and comprising selecting optimally-exposed pixels from the multiple dark reference images at multiple different exposures and normalizing to a selected optimal exposure time.

6. The method of claim 1 , comprising selecting optimally-exposed pixels from the multiple different exposures.

7. The method of claim 6 , comprising normalizing the optimally-exposed pixels to a selected optimal exposure time.

8. The method of claim 1 , comprising providing:

a plurality of cameras configured to capture images at the imaging location, and providing a plurality of light panel assemblies adjacent to the imaging location.

9. The method of claim 1 , wherein the illuminating the imaging location comprises illuminating with a spectrally-switchable light panel assembly that is switchable between multiple spectra.

10. The method of claim 9 , wherein the spectrally-switchable light panel assembly includes lighting elements configured to emit different spectra.

11. The method of claim 1 , wherein the one or more light panel assemblies comprise broadband lighting elements, and the capturing multiple images includes filtering with a filter assembly including individually selectable band-pass filters.

12. The method of claim 1 , wherein the one or more cameras configured to capture images comprise at least one spectrally-selective camera.

13. The method of claim 1 , comprising calculating a transmittance image data set for each viewpoint of the one or more cameras.

14. The method of claim 13 , wherein the calculating of the transmittance image data set is based upon at least:

normalized spectral reference images, and

normalized specimen images.

15. The method of claim 13 , wherein the calculating of the transmittance image data set is at least based upon normalized dark reference images.

16. The method of claim 13 , comprising processing the transmittance image data set to characterize the specimen container and/or characterize the specimen for each viewpoint.

17. The method of claim 13 , comprising classifying the specimen and/or specimen container based upon the transmittance image data set for each viewpoint.

18. A method of imaging a specimen container and/or specimen, comprising:

providing a specimen container containing a specimen at an imaging location;

providing one or more cameras configured to capture images at the imaging location;

providing one or more light sources adjacent to the imaging location;

illuminating the imaging location with the one or more light sources; and

capturing multiple images including:

specimen images of the imaging location at multiple different exposure times, with the specimen container and specimen being present at the image location; and

multiple dark reference images of the image location without the specimen container and specimen being present thereat, and with the one or more light sources being turned off.

19. A method of imaging a specimen container and/or specimen, comprising:

providing a specimen container containing a specimen at an imaging location;

providing one or more cameras configured to capture images at the imaging location;

providing one or more light sources adjacent to the imaging location;

illuminating the imaging location with the one or more light sources; and

capturing multiple images including:

specimen images of the imaging location at multiple different exposure times, with the specimen container and specimen being present at the image location; and

dark reference images and spectral reference images before capturing the specimen images.

20. A method of imaging a specimen container and a specimen, comprising:

providing a specimen container containing a specimen at an imaging location;

providing three cameras spaced about the imaging location and configured to capture images of the specimen container containing the specimen;

providing three panelized light sources adjacent the imaging location, each of the panelized light sources configured to illuminate the specimen container and the specimen with different colors of light;

sequentially illuminating the specimen container and the specimen with the three panelized light sources; and

capturing multiple images of the specimen container and the specimen from different viewpoints and at different exposures for each of the colors of light illuminating the specimen container and the specimen for each viewpoint.

21. A method of imaging a specimen container and/or specimen, comprising:

providing a specimen container containing a specimen at an imaging location;

providing one or more cameras configured to capture images at the imaging location;

providing one or more light sources adjacent to the imaging location;

illuminating the imaging location with the one or more light sources; and

capturing multiple images including:

specimen images of the imaging location at multiple different exposures, with the specimen container and specimen being present at the imaging location; and

spectral reference images of the image location without the specimen container and specimen being present thereat.

22. A method of imaging a specimen container and/or specimen, comprising:

providing a specimen container containing a specimen at an imaging location;

providing one or more cameras configured to capture images at the imaging location;

providing one or more light sources adjacent to the imaging location;

illuminating the imaging location with the one or more light sources;

capturing multiple images including specimen images of the imaging location at multiple different exposures with the specimen container and specimen being present at the imaging location;

selecting optimally-exposed pixels from the multiple different exposures; and

normalizing the optimally-exposed pixels to a selected optimal exposure time.

23. A method of imaging a specimen container and/or specimen, comprising:

providing a specimen container containing a specimen comprising at least a serum or plasma portion at an imaging location;

providing one or more cameras configured to capture images at the imaging location;

providing one or more spectrally-switchable light panel assemblies adjacent to the imaging location, the one or more spectrally-switchable light panel assemblies being switchable between multiple spectra and including lighting elements configured to emit different spectra;

illuminating the imaging location with the one or more spectrally-switchable light panel assemblies; and

capturing multiple images including specimen images of the imaging location at multiple different exposures, with the specimen container and specimen being present at the imaging location.

24. A method of imaging a specimen container and/or specimen, comprising:

providing a specimen container containing a specimen comprising at least a serum or plasma portion at an imaging location;

providing one or more cameras configured to capture images at the imaging location;

providing one or more light sources adjacent to the imaging location;

illuminating the imaging location with the one or more light sources;

capturing multiple images including specimen images of the imaging location at multiple different exposures, with the specimen container and specimen being present at the imaging location; and

calculating a transmittance image data set for each viewpoint of the one or more cameras.