EXIF.js gets picture information

problem description

using exif.js to get the direction information of a picture has been reported incorrectly. Some pictures have the following errors, and some pictures can get the direction information of a picture more than enough

related codes

/ / Please paste the code text below (do not replace the code with pictures)
Javascript
Jun.24,2022

is a problem with the EXIF.js library itself. This problem occurs when parsing images with a resolution greater than 600dpi, which has not been solved so far. see here . If you just want to get the direction of the picture, you can use the following code: 

getOrientation = function (file, callback) {
    var reader = new window.FileReader();
    reader.onload = function (e) {

        var view = new window.DataView(e.target.result);
        if (view.getUint16(0, false) != 0xFFD8) {
            return callback(-2);
        }
        var length = view.byteLength, offset = 2;
        while (offset < length) {
            var marker = view.getUint16(offset, false);
            offset += 2;
            if (marker == 0xFFE1) {
                if (view.getUint32(offset += 2, false) != 0x45786966) {
                    return callback(-1);
                }
                var little = view.getUint16(offset += 6, false) == 0x4949;
                offset += view.getUint32(offset + 4, little);
                var tags = view.getUint16(offset, little);
                offset += 2;
                for (var i = 0; i < tags; iPP) {
                    if (view.getUint16(offset + (i * 12), little) == 0x0112) {
                        return callback(view.getUint16(offset + (i * 12) + 8, little));
                    }

                }
            } else if ((marker & 0xFF00) != 0xFF00) {
                break;
            } else {
                offset += view.getUint16(offset, false);
            }
        }
        return callback(-1);
    };
    reader.readAsArrayBuffer(file);
}

Previous: Webstorm creates vue project cannot read property 'proxy' of undefined

Next: Springboot redirects redirect to the front page, how to get the parameters carried in the vue foreground and hide the parameters in the address navigation bar URL at the same time

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b391ac-2b4cd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b391ac-2b4cd.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?