change opacity of image code example
Example 1: css how to make background transparent
/* Use RGBA */
background-color: rgba(255, 255, 0, 0.75); /* Transparent Yellow */
Example 2: image opacity in html
img {
opacity: 0.5;
}
Example 3: change opacity of png
convert test.png -threshold 0% -alpha off black_threshold.png
Example 4: change opacity of png
convert test.png -threshold 80% -alpha off black_threshold.png