[Solved] Javascript how to get pixel colour from image data

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Because the program didn’t explicitly specify a format for the data output, sharp generated the output in the same format as the image source. In this case the input format was PNG, so your data buffer content is also in PNG format. That’s why the first 8 bytes of data are the standard PNG file header, see https://en.wikipedia.org/wiki/Portable_Network_Graphics#File_header

To get the data output formatted as a collection of pixels, regardless of whatever the image source’s format might have been, replace

    .toBuffer({resolveWithObject: true})

with

    .raw()
    .toBuffer({resolveWithObject: true})

solved Javascript how to get pixel colour from image data