RichText editor image is not coming in proper resolution on one environment


When we click on insert of richtext editor and then select the image/video/file upload URL. then put some url in URL text box then uploaded image icon has vary less resolution on one environment and on other environment it has more resolution.

Please see the below image for one environment with less image resolution.


image on another environment with more image resolution  

How we can get this image with same resolution on all the environment.

Kindly help.