title: Gulp optimize images with imagemin
body: <p>I'm trying to Gulp optimize my images with imagemin</p>
  
  <p><a href="https://www.npmjs.com/package/gulp-image-optimization" rel="nofollow noreferrer">https://www.npmjs.com/package/gulp-image-optimization</a></p>
  
  <p>I have problem to find a good documentation which can show me exact parameters and different option. For now there is not a lot of gain in my optimization:</p>
  
  <pre><code>var imageop = require('gulp-image-optimization');
  var pngquant = require('imagemin-pngquant');
  var imageminJpegoptim = require('imagemin-jpegoptim');
  
  var baseUrl = "web/assets/";
  var imgSrc = baseUrl + "src/images/";
  var imgDist = baseUrl + "dist/images/";
  
  gulp.task('img', function(cb) {
      gulp.src([imgSrc + '**/*.png', imgSrc + '**/*.jpg', imgSrc + '**/*.gif', imgSrc + '**/*.jpeg'])
          .pipe(imageop({
              optimizationLevel: 10,
              progressive: true,
              interlaced: true,
              use: [pngquant(), imageminJpegoptim()]
          }))
          .pipe(gulp.dest(imgDist)).on('end', cb).on('error', cb);
  });
  </code></pre>
  
  <p>Did I missed something in the config?</p>