Retain 100% Image Quality for Product Images

[Shailesh G]

Hello,

I have changed 700x700 to 864x864 in view.xml

 <image id="product_page_image_large" type="image"/>
            <image id="product_page_image_medium" type="image">
                <width>864</width>
                <height>864</height>
            </image>

So, now the enlarged image is of same dimension.

I have also, disabled Javascript resizing on upload & set JPG quality to 100%

However, there is visible difference between Original image & Lightbox Image(right click image-> open image in new tab)

Additional, there is size difference in the Uploaded image & Original image, so definitely some image processing is happening. How to stop that?

Have also tried switching from  GD to IMAGICK 

Is there a way I can retain 100% image quality?

[Yuriy]

You can disable images resize https://docs.magento.com/m2/ce/user_guide/catalog/product-image-resizing.html

[Shailesh G]

@Yuriy 

I had already done that and had added the screenshot too in my question.