video camera data processing

1 次查看（过去 30 天）
garima sharma
garima sharma 2021-1-11
评论： garima sharma 2021-1-13
Hi,
I have a camera recorded video data.
how can i convert video camera data into time-series data?
Thank you!

请先登录，再回答此问题。

回答（2 个）

KALYAN ACHARJYA
KALYAN ACHARJYA 2021-1-11
编辑：KALYAN ACHARJYA 2021-1-11
  1 个评论
garima sharma
garima sharma 2021-1-12
Thank you for reply.
it will convert video into image, but i want to extract pixel vs time information. eg cantlilever beam motion

请先登录，再进行评论。

Bjorn Gustavsson
Bjorn Gustavsson 2021-1-11
Simplest way might be to use VideoReader:
vidObj = VideoReader('Your-video.mp4');
Frame1 = read(vidObj,1);
idx1toExtract = 12:27:size(Frame1,1);
idx2toExtrace = 17:37:size(Frame1,2);
for frameNR = vidObj.NumFrames:-1:1
vidFrame = read(vidObj, frameNR);
Couple_of_timeseries(:,:,frameNR) = vidFrame(idx1toExtract,idx2toExtract);
end
% Plot the time-series for one pixel:
plot(squeeze(Couple_of_timeseries(2,4,:)))
You'll have to generate an array for the time of the frames from the FrameRate or CurrentTime information in vidObj. For much of the remaining processing I typically cast the data from uint8 to double as soon as possible.
HTH
  3 个评论
显示 1更早的评论
Bjorn Gustavsson
Bjorn Gustavsson 2021-1-13
Which matlab-version are you using? In my 2020a version vidObj has these properties.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Video Formats and Interfaces 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by