shelfio / aws-lambda-tesseract Goto Github PK

I'm very inexperienced with Lambda functions so apologies if this is a basic error.

I have a very simple Node app with the following structure:

index.js
tmp/demo.png

I added the demo code into index.js:

const { getTextFromImage, isSupportedFile } = require('@shelf/aws-lambda-tesseract');

exports.handler = async event => {
    console.log("Running...");

    const imagePath = "/tmp/demo.png";

    if(isSupportedFile(imagePath)) {
        console.log(`${imagePath} is supported`)
    } else {
        return false;
    }

    return getTextFromImage(imagePath);
};

However, when I run the Lambda it errors:

Response:
{
  "errorType": "Error",
  "errorMessage": "Command failed: /tmp/tesseract-standalone/tesseract /tmp/demo.png stdout -l eng\nError, cannot read input file /tmp/demo.png: No such file or directory\nError during processing.\n",
  "trace": [
    "Error: Command failed: /tmp/tesseract-standalone/tesseract /tmp/demo.png stdout -l eng",
    "Error, cannot read input file /tmp/demo.png: No such file or directory",
    "Error during processing.",
    "",
    "    at checkExecSyncError (child_process.js:630:11)",
    "    at execFileSync (child_process.js:648:15)",
    "    at module.exports.getTextFromImage (/opt/nodejs/node_modules/@shelf/aws-lambda-tesseract/src/index.js:19:18)"
  ]
}

Why can't the Lambda find the image in my tmp folder?

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Hi forks,
Thanks for a very useful library :)

I think it will be a big improvement if we support sending tesseract parameters such as:

getTextFromImage(image, {
   tessedit_char_whitelist: "123456789" // number only
})

What do you think?

Hi, can you add the option for output types please? Could look something like this:
`async function getTextFromImage(filePath, outputType) {
await (0, _tar.extract)({
file: inputPath,
cwd: '/tmp'
});

if (outputType !== 'stdout' || outputType !== 'txt' || outputType !== 'pdf'|| outputType !== 'hocr'|| outputType !== 'tsv') {
return "BAD_OUTPUT_TYPE"
}

const stdout = (0, _child_process.execFileSync)(outputPath, [filePath, outputType, '-l', 'eng'], {
cwd: '/tmp/tesseract-standalone',
env: {
LD_LIBRARY_PATH: './lib',
TESSDATA_PREFIX: './tessdata'
}
});
(0, _child_process.execSync)(rm ${filePath});
return stdout.toString();
}`

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