Method, device, computer equipment and medium for evaluating endoscope optical depth of field
By calculating the object square resolution at different working distances of the endoscope, the problem of strong subjectivity of depth of field testing in the prior art is solved, and the quantitative evaluation of the optical depth of field of the endoscope is achieved.
CN119379759BActive Publication Date: 2025-04-04SCIVITA MEDICAL TECHNOLOGY CO LTD
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Patent Information
- Application Number
- CN202411991198.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2044-12-31
AI Technical Summary
Technical Problem
The existing endoscopic optical depth of field testing methods are highly subjective, and the results vary from person to person, making it difficult to quantify the depth of field parameters.
Method used
By obtaining the image square resolution and local distortion rate at different working distances, the object square resolution is calculated, and the depth of field parameters are quantified using the object square resolution.
Benefits of technology
Quantitative evaluation of the optical depth of field of the endoscope is achieved, reducing subjectivity and improving the reliability of the test results.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention discloses an evaluation method, device, computer equipment and medium for the optical depth of field of an endoscope. The evaluation method for the optical depth of field of an endoscope comprises: respectively obtaining image space resolution and local distortion rate at different working distances; calculating object space resolution at different working distances according to the image space resolution and local distortion rate at different working distances, wherein the calculation formula of the object space resolution is object space resolution=image space resolution×distortion rate; wherein the method for obtaining image space resolution at different working distances comprises: adjusting an endoscope body or a star image target so that the endoscope body is perpendicular to the star image target, and an imaging surface of an imaging device of the endoscope body is arranged parallel to the star image target; changing the working distance between the endoscope body and the star image target, and collecting images of the star image target at different working distances; and analyzing the collected images of the star image target at different working distances to obtain modulation transfer function data, namely, image space resolution.
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