image base64 difference issue about image HOT 6 CLOSED

The difference is probably a result of the image getting decoded and re-encoded using different settings or different encoders, which while all producing PNG compliant images may embed different attributes into the image or use different compression algorithms or settings.

from image.

But the the original image source is png, there should no such encode, decode proccess performed to cause such issue.

I have another code can be assessed

        let _raw = std::fs::read(&url)?;
        let img = ImageReader::with_format(Cursor::new(&_raw), image::ImageFormat::Png).decode()?;
        let mut buf: Vec<u8> = Vec::new();
        img.write_to(&mut Cursor::new(&mut buf), image::ImageOutputFormat::Png)?;
        let _b64 = BASE64.encode(&buf);

However, it produce same base64 result

from image.

ImageReader::open is decoding the image. write_to is re-encoding it.

from image.

Did not find a way to prevent such proccess so far, the direct way as "https://www.reddit.com/r/rust/comments/11hyeau/help_cant_correctly_encode_an_image_to_base64" described caused an error.

from image.

ImageReader::open is decoding the image. write_to is re-encoding it.

@paolobarbolini Now the question becomes, fill the blank code snippet ;)

let base_img = image::open(url)?;
# convert the `base_img` into [u8] buffer, without encoding-decoding
let _b64 = BASE64.encode(&buf);

from image.

Okay, f**k image crate;

        let _buf = std::fs::read(&_url)?;
        let _b64 = BASE64.encode(&_buf);

Just solved it :P

from image.