How to set a variable name after snapshot?

Hi, i have a problem on how to save as variable image name and called it after snaphot? after that i want to crop it.

recognizeThreshold = 100;
vid = handles.vid;
vid.FramesPerTrigger = 1;
vid.ReturnedColorspace = 'rgb';
triggerconfig(vid, 'manual');
vidRes = get(vid, 'VideoResolution');
cam.Resolution = '1920x1080';
imWidth = vidRes(1);
imHeight = vidRes(2);
nBands = get(vid, 'NumberOfBands');
hImage = image(zeros(imHeight, imWidth, nBands), 'parent', handles.axes3);
preview(vid, hImage);
% bersedia untuk capture image
start(vid);
% capture!
trigger(vid);
snapshot = getdata(vid);
counter=1;
% save the image file
%imwrite(snapshot, 'C:\Users\nazmiz\Desktop\PCB Tester\TestedPCB\Test.png')
savenam = strcat('C:\Users\nazmiz\Desktop\PCB Tester\TestedPCB\' ,num2str(counter), '.png'); %this is where and what your image will be saved
    baseDir  = 'C:\Users\nazmiz\Desktop\PCB Tester\TestedPCB\';
    %     baseName = 'image_';
    newName  = [baseDir num2str(counter) '.jpg'];
    
    while exist(newName,'file')
        counter = counter + 1;
        newName = [baseDir num2str(counter) '.jpg'];
    end
% show gambar yang snap tadi tu
axes(handles.axes3);
%imshow('C:\Users\nazmiz\Desktop\PCB Tester\TestedPCB\' ,num2str(counter),'.png');
%crop('C:\Users\nazmiz\Desktop\PCB Tester\TestedPCB\' ,num2str(counter),'.png');
%testing(cropimage.jpg);

This is an example image, i want to take a pcb picture only.

Answer 1

[Image Analyst]

I usually call getsnapshot(), but you did

snapshot = getdata(vid);

so snapshot is the name of your variable. You can use imcrop() to crop it.

[MUHAMMAD NAZMI ZAINAL AZALI]

ya, i mean i want to add 1 after save snapshot, and call it later.

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

[Image Analyst]

Do you mean

snapshot1 = snapshot; % Save copy in snapshot1.

or you can save to disk like

baseFileName = sprintf('Snapshot %3.3d.png', counter);
fullFileName = fullfile(baseDir, baseFileName);
imwrite(snapshot, fullFileName); % Save to disk.

[MUHAMMAD NAZMI ZAINAL AZALI]

Then how to call it back from

imwrite(snapshot, fullFileName); % Save to disk.

[Walter Roberson]

To "call it back" from the imwrite(), build the appropriate file name and imread() it.

For example,

counter = randi(number_of_images);
baseFileName = sprintf('Snapshot %3.3d.png', counter);
fullFileName = fullfile(baseDir, baseFileName);
snapshot = imread(fullFileName);

[MUHAMMAD NAZMI ZAINAL AZALI]

Great!, thanks!

[Image Analyst]

Then can you "Accept this answer"? Thanks in advance.