Download All Image from google search, THIS IS NOT MINE, I JUST AGGREGATING IT, original credit goes to pyimagesearch.com

download_google_image.js

function simulateRightClick( element ) {
    var event1 = new MouseEvent( 'mousedown', {
        bubbles: true,
        cancelable: false,
        view: window,
        button: 2,
        buttons: 2,
        clientX: element.getBoundingClientRect().x,
        clientY: element.getBoundingClientRect().y
    } );
    element.dispatchEvent( event1 );
    var event2 = new MouseEvent( 'mouseup', {
        bubbles: true,
        cancelable: false,
        view: window,
        button: 2,
        buttons: 0,
        clientX: element.getBoundingClientRect().x,
        clientY: element.getBoundingClientRect().y
    } );
    element.dispatchEvent( event2 );
    var event3 = new MouseEvent( 'contextmenu', {
        bubbles: true,
        cancelable: false,
        view: window,
        button: 2,
        buttons: 0,
        clientX: element.getBoundingClientRect().x,
        clientY: element.getBoundingClientRect().y
    } );
    element.dispatchEvent( event3 );
}

function getURLParam( queryString, key ) {
    var vars = queryString.replace( /^\?/, '' ).split( '&' );
    for ( let i = 0; i < vars.length; i++ ) {
        let pair = vars[ i ].split( '=' );
        if ( pair[0] == key ) {
            return pair[1];
        }
    }
    return false;
}

function createDownload( contents ) {
    var hiddenElement = document.createElement( 'a' );
    hiddenElement.href = 'data:attachment/text,' + encodeURI( contents );
    hiddenElement.target = '_blank';
    hiddenElement.download = 'urls.txt';
    hiddenElement.click();
}

function grabUrls() {
    var urls = [];
    return new Promise( function( resolve, reject ) {
        var count = document.querySelectorAll(
        	'.isv-r a:first-of-type' ).length,
            index = 0;
        Array.prototype.forEach.call( document.querySelectorAll(
        	'.isv-r a:first-of-type' ), function( element ) {
            // using the right click menu Google will generate the
            // full-size URL; won't work in Internet Explorer
            // (http://pyimg.co/byukr)
            simulateRightClick( element.querySelector( ':scope img' ) );
            // Wait for it to appear on the <a> element
            var interval = setInterval( function() {
                if ( element.href.trim() !== '' ) {
                    clearInterval( interval );
                    // extract the full-size version of the image
                    let googleUrl = element.href.replace( /.*(\?)/, '$1' ),
                        fullImageUrl = decodeURIComponent(
                        	getURLParam( googleUrl, 'imgurl' ) );
                    if ( fullImageUrl !== 'false' ) {
                        urls.push( fullImageUrl );
                    }
                    // sometimes the URL returns a "false" string and
                    // we still want to count those so our Promise
                    // resolves
                    index++;
                    if ( index == ( count - 1 ) ) {
                        resolve( urls );
                    }
                }
            }, 10 );
        } );
    } );
}


grabUrls().then( function( urls ) {
    urls = urls.join( '\n' );
    createDownload( urls );
} );

Original post here https://www.pyimagesearch.com/2017/12/04/how-to-create-a-deep-learning-dataset-using-google-images/

mouse simulation doesn't work, you have to scroll all the way down till the end of pages