Who can refactor this code to open in Matlab2020

 %% Initialization
redThresh = 0.10; % Threshold for red detection
vidDevice = imaq.VideoDevice('winvideo', 1, 'RGB24_640x480', ... % Acquire input video stream
                    'ROI', [1 1 640 480], ...
                    'ReturnedColorSpace', 'rgb');
vidInfo = imaqhwinfo(vidDevice);  % Acquire input video property
hblob = vision.BlobAnalysis('AreaOutputPort', false, ... % Set blob analysis handling
                                'CentroidOutputPort', true, ... 
                                'BoundingBoxOutputPort', true', ...
                                'MinimumBlobArea', 800, ...
                                'MaximumBlobArea', 3000, ...
                                'MaximumCount', 10);
hshapeinsRedBox = vision.ShapeInserter( 'BorderColor', 'Custom', ... % Set Red box handling
                                        'CustomBorderColor', [1 0 0], ...
                                        'Fill', true, ...
                                        'FillColor', 'Custom', ...
                                        'CustomFillColor', [1 0 0], ...
                                        'Opacity', 0.2);
htextins = vision.TextInserter('Text', 'Number of Red Object: %2d', ... % Set text for number of blobs
                                       'Location',  [7 2], ... 
                                       'Color', [1 0 0], ... % Red Colour
                                       'FontSize', 12);
htextinsCent = vision.TextInserter('Text', '+      X:%4d, Y:%4d', ... % set text for centroid
                                    'LocationSource', 'Input port', ...
                                    'Color', [1 1 0], ... // yellow color
                                    'FontSize', 14);
hVideoIn = vision.VideoPlayer('Name', 'Object Tracking - Avinash.B [2017209043]', ... % Output Video Player
                              'Position', [100 100 640 480]);
nFrame = 0; % Frame number initialization

%% Processing Loop
while(nFrame < 2000)
    rgbFrame = step(vidDevice); % Acquire single frame
    rgbFrameMirror = flipdim(rgbFrame,2); % Obtain the mirror image for displaying
    rgbgray=rgb2gray(rgbFrameMirror);
    diffFrameSub = imsubtract(rgbFrameMirror(:,:,1), rgbgray); % Get red component of the image
    diffFrame = medfilt2(diffFrameSub, [3 3]); % Filter out the noise by using median filter
    binFrame = im2bw(diffFrame, redThresh); % Convert the image into binary image with the red objects as white
    [centroid, bbox] = step(hblob, binFrame); % Get the centroids and bounding boxes of the blobs
    centroid = uint16(centroid); % Convert the centroids into Integer for further steps 
    rgbFrameMirror(1:20,1:165,:) = 0; % put a black region on the output stream
    vidIn = step(hshapeinsRedBox, rgbFrameMirror, bbox); % Instert the red box
    
    for object = 1:1:length(bbox(:,1)) % Write the corresponding centroids
        centX = centroid(object,1); %Store X Value in centX
        centY = centroid(object,2); %Store Y Value in centY
        vidIn = step(htextinsCent, vidIn, [centX centY], [centX-6 centY-9]); % Video Insert X,Y Values
    end
    
    vidIn = step(htextins, vidIn, uint8(length(bbox(:,1)))); % Count the number of blobs
    step(hVideoIn, vidIn); % Output video stream
    nFrame = nFrame+1;
end

%% Clearing Memory
release(hVideoIn); % Release all memory and buffer used
release(vidDevice);
clear all;
clc;

[Cris LaPierre]

What errors are you getting when you run your code in R2020a/b?

[Vitaliy Rychak]

Unable to resolve the name vision.TextInserter.

Error in ... (line 37)

htextinsRed = vision.TextInserter('Text', 'Red : %2d', ... % Set text for number of blobs

Answer 1

[Cris LaPierre]

There does not appear to be a vision.TextInserter function or method. Perhaps you are meaning to use insertText?

See here: https://www.mathworks.com/matlabcentral/answers/525917-understanding-the-vision-textinserter-error

[Vitaliy Rychak]

I tried replacing with "insertText". Maybe I did it wrong, because I don't have much experience, I'm just a beginner

[Cris LaPierre]

You won't be able to just swap vision.TextInserter with insertText as the syntax is different. I suggest going through the linked doc page to learn the correct syntax of insertText so you can adapt your code.

You'll also find a couple examples on the linked page.

The main difference I see is that your first input to insertText needs to be an image, which means you probably need to move this code inside your for loop, as your images will be the video frames.