How to save an image using imwrite with a filename from a variable

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Nalini Nadupalli 2016-10-24

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https://ww2.mathworks.cn/matlabcentral/answers/308885-how-to-save-an-image-using-imwrite-with-a-filename-from-a-variable

编辑： Jan 2018-3-19

采纳的回答： Kirby Fears

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I am saving a frame from a video as an image. Both the image and video should have the same name. How can I save an image with a file name from a variable? The filenames are stored in the variable videos.name

    videos = dir('*.avi');
for i = 1:size(videos)
    [pathstr,name,ext] = fileparts(videos(i).name) 
    V = VideoReader(videos(i).name);
    oneframe = readFrame(V);
    imshow(oneframe)
    imwrite(oneframe, name, '.jpg')
end

Thank you very much!

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Jan 2018-3-19

编辑：Jan 2018-3-19

[MOVED from flag]

Adam Eshag wrote: "How can I save different preprocessed images in the same folder"

The answer sounds trivial: Provide different file names. Prefer to open a new thread and to add any details about what your problem is.

@Adam: Please use flags only to inform admins and editors about inappropriate contents like spam or rudeness. Thanks.

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Kirby Fears 2016-10-24

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编辑：Kirby Fears 2016-10-24

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Hi Nalini,

You can combine string values using square brackets. The syntax for imwrite using your variable names is as follows:

imwrite(oneframe, [name, '.jpg']);

Check your workspace to ensure name is the intended file name without a file extension.

Hope this helps

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Nalini Nadupalli 2016-10-24

Thanks a ton! This is exactly what I needed

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FPGA, ASIC, and SoC Development Vision HDL Toolbox Video Formats and Interfaces

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