Here is a picture I found on Pexels.com, a free licensed photo website. This picture is originally 5472 x 3648 pixels. See below.
Here I used Adobe Photoshop to reformat the photo for the web. I converted the quality to 150K. See below.
Here I used the same photo and reformatted it on Adobe Photoshop for Edoc quality. I changed the quality so to get it as close to 400K.
Using the same photo, I formatted it to 400K and manipulated the picture with a filter using Adobe Photoshop. The filter used on this picture is a mosaic filter.