Flow meter and related method

Patent metadata

Field	Value
Publication number	US-11793928-B2
Application number	US-202217749672-A
Country	US
Kind code	B2
Filing date	May 20, 2022
Priority date	Dec 21, 2011
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A system for regulating fluid flow having a processor configured to reduce image noise is provided. The system includes an image sensor to capture an image of the drip chamber. The processor captures the image of the drip chamber using the image sensor, performs an edge detection on the image to generate a first processed image, and performs a Boolean-operation on a pixel on a first side of an axis of the first processed image with a corresponding pixel on a second side of the axis of the first processed image to generate a second processed image.

First claim

What is claimed is:

1. A system for regulating fluid flow having a processor configured to reduce image noise, the system comprising:
an image sensor configured to capture an image of a drip chamber, wherein the processor is configured to:
capture the image of the drip chamber using the image sensor,
perform an edge detection on the image to generate a first processed image, and
perform a Boolean-operation on a pixel on a first side of an axis of the first processed image with a corresponding pixel on a second side of the axis of the first processed image to generate a second processed image.

2. The system according to claim 1 , wherein the edge detection is performed using a canny edge detection.

3. The system according to claim 1 , wherein the processor is configured to match a template to the image.

4. The system of claim 3 , wherein the template includes at least a partial image of a drop of the fluid forming within the drip chamber.

5. The system of claim 1 , wherein the processor is configured to apply a blurring function to the image captured by the image sensor of the drip chamber.

6. The system according to claim 5 , wherein the blurring function is a low pass filter.

7. The system according to claim 5 , wherein the blurring function is configured to blur in a vertical direction.

8. The system according to claim 5 , wherein the blurring function is configured to blur in a horizontal direction.

9. The system according to claim 5 , wherein the blurring function is a one-dimensional Gaussian Blur function.

10. The system according to claim 5 , wherein the blurring function is a two-dimensional Gaussian Blur function.

11. A method for reducing image noise, the method comprising:
capturing an image of a drip chamber;
applying a blurring function to the image of the drip chamber; and
performing a Boolean-operation on a pixel on a first side of an axis of a first processed image with a corresponding pixel on a second side of the axis of the first processed image to generate a second processed image.

12. The method according to claim 11 , further comprising performing a canny edge detection.

13. The method according to claim 11 , further comprising matching a template to the image.

14. The method according to claim 13 , wherein the template includes at least a partial image of a drop of the fluid forming within the drip chamber.

15. The method according to claim 11 , wherein the blurring function is a low pass filter.

16. The method according to claim 11 , wherein the act of applying the blurring function comprises blurring in a vertical direction.

17. The method according to claim 11 , wherein the act of applying the blurring function comprises blurring in a horizontal direction.

18. The method according to claim 11 , wherein the blurring function is a one-dimensional Gaussian Blur function.

19. The method according to claim 11 , wherein the blurring function is a two-dimensional Gaussian Blur function.

Assignees

• Deka Products Lp

Inventors

• Peret Bob D
• Kane Derek G
• Kamen Dean
• Murphy Colin H
• Kerwin John M

Classifications

• G16H40/67

  for remote operation · CPC title

• G16H40/63

  for local operation · CPC title

• G16H30/40

  for processing medical images, e.g. editing · CPC title

• G16H30/20

  for handling medical images, e.g. DICOM, HL7 or PACS · CPC title

• G16H20/17

  delivered via infusion or injection · CPC title