How to play video in matlab for computer vision?

I am trying to do object recognition using blob analysis. when i did write the code the video is flickering every second, is it possible to have a video player running without flickering? I have attached my code below. please recommend me any changes

%% Setup of video
vidReader=vision.VideoFileReader('vidf.mp4');
vidReader.VideoOutputDataType='double';
%% structural element
diskelem=strel('disk',22);
hblob=vision.BlobAnalysis('MinimumBlobArea',200,'MaximumBlobArea',4000);

while ~isDone(vidReader)

    %read frame
    vidframe=step(vidReader);

    %rgb to hsv color space
    I=rgb2hsv(vidframe);
    %htextins=insertText(I,'position',[20,20],'Color',[255 255 0],'Fontsize',30);

    % Define thresholds for channel 1 based on histogram settings
channel1Min = 0.091;
channel1Max = 0.234;

% Define thresholds for channel 2 based on histogram settings
channel2Min = 0.309;
channel2Max = 1.000;

% Define thresholds for channel 3 based on histogram settings
channel3Min = 0.000;
channel3Max = 1.000;

% Create mask based on chosen histogram thresholds
sliderBW = (I(:,:,1) >= channel1Min ) & (I(:,:,1) <= channel1Max) & ...
    (I(:,:,2) >= channel2Min ) & (I(:,:,2) <= channel2Max) & ...
    (I(:,:,3) >= channel3Min ) & (I(:,:,3) <= channel3Max);
BW = sliderBW;

%using morphological operations
ibwopen=imopen(BW,diskelem);

%extract the blobs from the frame

[areaOut,centroidOut, bboxOut]=step(hblob,ibwopen);

%draw a box around detected objects
% ishape=insertShape(vidframe,'Rectangle',bboxOut,'ShapeColor','black');
iannotate = insertObjectAnnotation(vidframe,"rectangle",bboxOut,'banana',TextBoxOpacity=0.9,FontSize=18);



%paly in video player
vidPlayer = vision.DeployableVideoPlayer;

%step(vidPlayer,ishape);
step(vidPlayer,iannotate);


end

%%release
release(vidReader)
release(hblob)
release(vidPlayer)
%release(ishape)

Answer 1

[Image Analyst]

Do you really need to re-instantiate the video player inside the while loop? Try moving these lines before the while loop

% Instantiate the video player
vidPlayer = vision.DeployableVideoPlayer;

and remove them from inside the loop.

Which one of those lines in the loop actually does the update with the new frame image?

You might also try putting a "drawnow" command in variouis places and see if that helps with the flicker.

[Ashokraj]

Thanks it worked i.e., instantiating the video player before while loop.

[Ashokraj]

how can I know what is the processing power required to implement this? whether do I need a controller or micro processor or fpga how can I know?

how to implement algorithms in microcontroller?

[Image Analyst]

You can call the Mathworks and ask about the Coder Toolbox. I haven't used it but I think it somehow lets you take your code and make it so it can be embedded in firmware or silicon on portable or detached, standalone devices.

https://www.mathworks.com/products/matlab-coder.html?s_tid=srchtitle_site_search_4_coder%20toolbox

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