matlab把图片转为base64
function = base64file(file)fid = fopen(file,'rb');
bytes = fread(fid);
fclose(fid);
base64string_len = size(bytes,1);
encoder = org.apache.commons.codec.binary.Base64;
base64string = char(encoder.encode(bytes))';
end
文档来源：51CTO技术博客https://blog.51cto.com/u_15284226/2992304
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