Medical stroboscope system
A system, method, scope device, and camera control module device for a video endoscopy system, to enable scopes to operate with a rolling shutter-type image sensor. With selected pulsing of a strobe light, subset image data from adjacent rolling-shutter frames is selected, gain compensated for missing light and combined into a new single video frame.
1 . A medical stroboscope system comprising:
a stroboscopic laryngoscope;
a microphone;
a camera control module including an electronic controller communicatively coupled to the stroboscopic laryngoscope and the microphone;
a display device communicatively coupled to the camera control module; and
wherein the camera control module electronic controller is operable for:
measuring a patient's vocalization with the microphone and determining a base frequency of the vocalization;
during the patient's vocalization, causing a light emitter of the stroboscopic laryngoscope to pulse at a timing interval selected based on the base frequency of the vocalization;
reading image data from an image sensor array of the stroboscopic laryngoscope according to a rolling shutter process including: (a) creating two or more light emitter pulses during first and second adjacent image frames, (b) reading the image data from lines of the image sensor array offset in time such that at least two of the two or more light emitter pulses each expose sensor pixels in both first and a second image frames simultaneously, and (c) selecting a first subset including only data scanned in a second-half period of reading of the image data from the first frame and a second subset including only data scanned in a first-half period of reading of the image sensor data from the second frame, the first and second subsets including data resulting from the simultaneous exposure of the first and second frames; and
combining the image data from the first and second subsets to create a combined image frame based on the first and second frames.
2 . The system of claim 1 , in which the camera control module is further operable for applying a digital gain to values on one or more lines in the first and second subsets to compensate for a loss of exposure due to a gap time between the first and second frames in the rolling shutter process.
3 . The system of claim 2 , in which the camera control module is further operable for creating the two or more light emitter pulses in a sequence in which the pulses are spaced at a time period that is the inverse of the base frequency of the vocalization, and in which a gap occurs in the sequence such that at least one pulse is missing.
4 . The system of claim 1 , in which the camera control module is further operable for repeating (a)-(c) for subsequent pairs of image frames following the first and second image frames and combining image data from subsequent first and second subsets into subsequent combined image frames.
5 . The system of claim 2 , in which the camera control module is further operable for repeating (a)-(c) for subsequent pairs of image frames following the first and second image frames and combining image data from subsequent first and second subsets into subsequent combined image frames.
6 . The system of claim 5 , in which the camera control module is further operable for creating subsequent two or more light emitter pulses for subsequent image frames spaced in time from the pulses of the first and second image frames according to integer multiples of a time period that is the inverse of the base frequency of the vocalization.
7 . The system of claim 6 , in which the camera control module is further operable for creating the two or more light emitter pulses in a sequence in which the pulses are spaced at a time period that is the inverse of the base frequency of the vocalization, and in which a gap occurs in the sequence such that at least one pulse is missing.
8 . The system of claim 4 , in which the camera control module is further operable for creating subsequent two or more light emitter pulses for subsequent image frames spaced in time from the pulses of the first and second image frames according to integer multiples of a time period that is the inverse of the base frequency of the vocalization.
9 . The system of claim 4 , in which the camera control module is further operable for creating the two or more light emitter pulses in a sequence in which the pulses are spaced at a time period that is the inverse of the base frequency of the vocalization, and in which a gap occurs in the sequence such that at least one pulse is missing.
10 . The system of claim 1 , in which the camera control module is further operable for creating the two or more light emitter pulses in a sequence in which the pulses are spaced at a time period that is the inverse of the base frequency of the vocalization, and in which a gap occurs in the sequence such that at least one pulse is missing.
11 . A medical stroboscope system comprising:
a stroboscopic laryngoscope;
a microphone;
a camera control module including an electronic controller communicatively coupled to the stroboscopic laryngoscope and the microphone;
a display device communicatively coupled to the camera control module; and
wherein the camera control module electronic controller is operable for:
measuring a patient's vocalization with the microphone and determining a base frequency of the vocalization;
during the patient's vocalization, causing a light emitter of the stroboscopic laryngoscope to pulse at a timing interval selected based on the base frequency of the vocalization;
reading image data from an image sensor array of the stroboscopic laryngoscope according to a rolling shutter process including: (a) creating two or more light emitter pulses during first and second adjacent image frames, (b) reading the image data from lines of the image sensor array offset in time such that at least two of the two or more light emitter pulses each expose sensor pixels in both first and a second image frames simultaneously, and (c) selecting a first subset of the image data from the first frame and a second subset of the image sensor data from the second frame, the second subset including a different frame portion than the first subset, the first and second subsets including data resulting from the simultaneous exposure of the first and second frames; and
combining the image data from the first and second subsets to create a combined image frame based on the first and second frames;
wherein the camera control module is further operable for repeating (a)-(c) for subsequent pairs of image frames following the first and second image frames and combining image data from subsequent first and second subsets into subsequent combined image frames, and wherein the camera control module is further operable for creating subsequent two or more light emitter pulses for subsequent image frames spaced in time from the pulses of the first and second image frames according to integer multiples of a time period that is the inverse of the base frequency of the vocalization.
12 . The system of claim 11 , in which the first subset includes only data scanned in a second-half period of reading the first frame, and the second subset includes only data scanned in a first-half period of reading the second frame.
13 . The system of claim 11 , in which the camera control module is further operable for applying a digital gain to values on one or more lines in the first and second subsets to compensate for a loss of exposure due to a gap time between the first and second frames in the rolling shutter process.
14 . The system of claim 11 , in which the camera control module is further operable for creating the two or more light emitter pulses in a sequence in which the pulses are spaced at a time period that is the inverse of the base frequency of the vocalization, and in which a gap occurs in the sequence such that at least one pulse is missing.
15 . A medical stroboscope system comprising:
a stroboscopic laryngoscope;
a microphone;
a camera control module including an electronic controller communicatively coupled to the stroboscopic laryngoscope and the microphone;
a display device communicatively coupled to the camera control module; and
wherein the camera control module electronic controller is operable for:
measuring a patient's vocalization with the microphone and determining a base frequency of the vocalization;
during the patient's vocalization, causing a light emitter of the stroboscopic laryngoscope to pulse at a timing interval selected based on the base frequency of the vocalization;
reading image data from an image sensor array of the stroboscopic laryngoscope according to a rolling shutter process including: (a) creating two or more light emitter pulses during first and second adjacent image frames, (b) reading the image data from lines of the image sensor array offset in time such that at least two of the two or more light emitter pulses each expose sensor pixels in both first and a second image frames simultaneously, and (c) selecting a first subset of the image data from the first frame and a second subset of the image sensor data from the second frame, the second subset including a different frame portion than the first subset, the first and second subsets including data resulting from the simultaneous exposure of the first and second frames; and
combining the image data from the first and second subsets to create a combined image frame based on the first and second frames,
wherein the camera control module is further operable for creating the two or more light emitter pulses in a sequence in which the pulses are spaced at a time period that is the inverse of the base frequency of the vocalization, and in which a gap occurs in the sequence such that at least one pulse is missing.
16 . The system of claim 15 , in which the first subset includes only data scanned in a second-half period of reading the first frame, and the second subset includes only data scanned in a first-half period of reading the second frame.
17 . The system of claim 16 , in which the camera control module is further operable for applying a digital gain to values on one or more lines in the first and second subsets to compensate for a loss of exposure due to a gap time between the first and second frames in the rolling shutter process.
18 . The system of claim 15 , in which the camera control module is further operable for applying a digital gain to values on one or more lines in the first and second subsets to compensate for a loss of exposure due to a gap time between the first and second frames in the rolling shutter process.
19 . The system of claim 15 , in which the camera control module is further operable for repeating (a)-(c) for subsequent pairs of image frames following the first and second image frames and combining image data from subsequent first and second subsets into subsequent combined image frames.
20 . The system of claim 15 , in which the camera control module is further operable for creating subsequent two or more light emitter pulses for subsequent image frames spaced in time from the pulses of the first and second image frames according to integer multiples of a time period that is the inverse of the base frequency of the vocalization.