<div class="img-hover-zoom">
  <img src="/path/to/image/" alt="This zooms-in really well and smooth">
</div>

/* [1] The container */
.img-hover-zoom {
  height: 300px; /* [1.1] Set it as per your need */
  overflow: hidden; /* [1.2] Hide the overflowing of child elements */
}

/* [2] Transition property for smooth transformation of images */
.img-hover-zoom img {
  transition: transform .5s ease;
}

/* [3] Finally, transforming the image when container gets hovered */
.img-hover-zoom:hover img {
  transform: scale(1.5);
}

/* The Image container */
.img-hover-zoom {
  height: 300px; /* Modify this according to your need */
  overflow: hidden; /* Removing this will break the effects */
}

<div class="img-hover-zoom img-hover-zoom--xyz">
  <img src="/path/to/image/" alt="Another Image zoom-on-hover effect">
</div>

/* Quick-zoom Container */
.img-hover-zoom--quick-zoom img {
  transform-origin: 0 0;
  transition: transform .25s, visibility .25s ease-in;
}

/* The Transformation */
.img-hover-zoom--quick-zoom:hover img {
  transform: scale(2);
}

/* Point-zoom Container */
.img-hover-zoom--point-zoom img {
  transform-origin: 65% 75%;
  transition: transform 1s, filter .5s ease-out;
}

/* The Transformation */
.img-hover-zoom--point-zoom:hover img {
  transform: scale(5);
}

/* Zoom-n-rotate Container */
.img-hover-zoom--zoom-n-rotate img {
  transition: transform .5s ease-in-out;
}

/* The Transformation */
.img-hover-zoom--zoom-n-rotate:hover img {
  transform: scale(2) rotate(25deg);
}

/* Slow-motion Zoom Container */
.img-hover-zoom--slowmo img {
  transform-origin: 50% 65%;
  transition: transform 5s, filter 3s ease-in-out;
  filter: brightness(150%);
}

/* The Transformation */
.img-hover-zoom--slowmo:hover img {
  filter: brightness(100%);
  transform: scale(3);
}

/* Brightness-zoom Container */
.img-hover-zoom--brightness img {
  transition: transform 2s, filter 1.5s ease-in-out;
  transform-origin: center center;
  filter: brightness(50%);
}

/* The Transformation */
.img-hover-zoom--brightness:hover img {
  filter: brightness(100%);
  transform: scale(1.3);
}

/* Horizontal Zoom-n-pan Container */
.img-hover-zoom--zoom-n-pan-h img {
  transition: transform .5s ease-in-out;
  transform: scale(1.4);
  transform-origin: 100% 0;
}

/* The Transformation */
.img-hover-zoom--zoom-n-pan-h:hover img {
  transform: scale(1.5) translateX(30%);
}

/* Vertical Zoom-n-pan Container */
.img-hover-zoom--zoom-n-pan-v img {
  transition: transform .5s ease-in-out;
  transform: scale(1.4);
  transform-origin: 0 0;
}

/* The Transformation */
.img-hover-zoom--zoom-n-pan-v:hover img {
  transform: scale(1.25) translateY(-30%);
}

/* Blur-zoom Container */
.img-hover-zoom--blur img {
  transition: transform 1s, filter 2s ease-in-out;
  filter: blur(2px);
  transform: scale(1.2);
}

/* The Transformation */
.img-hover-zoom--blur:hover img {
  filter: blur(0);
  transform: scale(1);
}

/* Colorize-zoom Container */
.img-hover-zoom--colorize img {
  transition: transform .5s, filter 1.5s ease-in-out;
  filter: grayscale(100%);
}

/* The Transformation */
.img-hover-zoom--colorize:hover img {
  filter: grayscale(0);
  transform: scale(1.1);
}