I’ve noticed quite a few friends discussing that ECSHOP product thumbnail quality isn’t great—they look blurry. This happens because when ECSHOP’s GD library generates thumbnails, the program defaults to creating JPG thumbnails (product images) at 75% quality. Of course, there’s a reason for this default of 75%—it’s mainly to help ECSHOP store pages load faster. However, many users aren’t satisfied with this ECSHOP product thumbnail effect. In fact, we can improve thumbnail quality by modifying the default quality value. Here’s the specific fix:
In your store root directory /includes/cls_image.php, search for:
if (function_exists('imagejpeg'))
{
$filename .= '.jpg';
imagejpeg($img_thumb, $dir . $filename);
}
if (function_exists('imagejpeg'))
{
$filename .= '.jpg';
imagejpeg($img_thumb, $dir . $filename, 90);
}
if (function_exists('imagejpeg'))
{
$filename .= '.jpg';
imagejpeg($img_thumb, $dir . $filename);
}
Modify it to:
if (function_exists('imagejpeg'))
{
$filename .= '.jpg';
imagejpeg($img_thumb, $dir . $filename, 90);
} Remember to regenerate the thumbnails in ECSHOP Admin —》 Image Batch Processing after making these changes.
With this simple modification, your thumbnails should now be clearer. The value 90 can be adjusted between 0 and 100. A higher value produces clearer thumbnails, but the resulting images will take up more server space, and your ECSHOP pages will load slightly slower.
Up to this point is the original text circulated widely on Baidu. So, is the problem truly fixed just by modifying the code here? Not really. Why does the image clarity still fall short?
The real cause is related to your admin settings and how you crop your images. First, understand what shape your admin display settings require for images. If it’s set to square, then the image you crop must also be square and equal to or slightly larger than the dimensions you set for the image frame. This completely resolves the blurry image issue. You can refer to the “Promote and Sell” section — the images there are very clear, right?