Method for estimating blood component quantities in surgical textiles

1. A system for measuring blood content, comprising:

a color imaging system configured to acquire a color image of a field of view comprising a surgical textile;

an infrared imaging system configured to acquire an infrared image of the field of view;

a processor configured to:

determine depth information for the surgical textile from the infrared image;

identify surgical textile pixels in the color image; and

extract blood information from the surgical textile pixels.

2. The system of claim 1 , wherein the processor is further configured to transform the infrared image to a coordinate system corresponding to the color image.

3. The system of claim 1 , wherein the processor is further configured to generate a depth image from the infrared image.

4. The system of claim 3 , wherein the processor is further configured to identify a planar set of pixels in the depth image.

5. The system of claim 4 , wherein the processor is further configured to detect a surgical textile image perimeter in the depth image.

6. The system of claim 5 , wherein the detection of the surgical textile image perimeter is performed by looking for a sharp vertical depth drop-off in the depth image.

7. The system of claim 3 , wherein the processor is further configured to downsample the depth image or the infrared image.

8. The system of claim 7 , wherein the processor is further configured to generate a mask image from the downsampled depth image.

9. The system of claim 8 , wherein the processor is further configured to upsample the mask image.

10. The system of claim 1 , wherein the processor is further configured to perform fill-in of a missing infrared pixel region in the infrared image.

11. The system of claim 5 , wherein the processor is further configured to generate a mask image using the detected perimeter.

12. The system of claim 11 , wherein the processor is further configured to transform the mask image to a coordinate system of the color image.

13. The system of claim 11 , wherein the detected perimeter is a top edge and a bottom edge of a surgical textile image.

14. The system of claim 11 , wherein the detected perimeter comprises opposing edges of a surgical textile image.

15. The system of claim 11 , wherein the detected perimeter comprises corners of a surgical textile image.

16. The system of claim 1 , wherein the processor is further configured to index a frame counter upon generating shape information that is characteristic of the surgical textile.

17. A computer-implemented method of analyzing an object containing a blood component, comprising:

acquiring a depth image and a color image of a field of view;

using the depth image to determine the presence of a surgical textile in the field of view; and

using the color image to estimate a characteristic of a blood component contained in the surgical textile.

18. The method of claim 17 , further comprising:

generating an image mask using the depth image; and

applying the image mask to the color image to eliminate background pixels.

19. The method of claim 18 , further comprising applying at least one of erosion and dilation image processing to the depth image.

20. A computer-implemented method of performing fluid monitoring, comprising:

acquiring a depth image of a surgical textile in a field of view;

acquiring a color image of the surgical textile in the field of view;

generating an image mask using the depth image; and

using the image mask with the color image to identify a region of the color image corresponding to the surgical textile.

21. The method of claim 20 , further comprising transforming the infrared image to the geometry perspective of the color image.

22. The method of claim 20 , further comprising downsampling the infrared image prior to generating the image mask.

23. The method of claim 22 , further comprising upsampling the image mask before using the image mask to identify the region of the color image.