What is impact on the image embedding result when the alpha channel is dropped by the converter

[githubusersel]

Hi,

• I'm wondering what is the impact on image embedding result when alpha channel dropped by converter? I found that taking screenshots from Mac adds extra alpha channel to the image. Because CLIP model only works with RGB, it needs to be converted. But I don't think there's enough explanation of how it affects the embedding results using the dropped channel.
• What's good practice to convert RGBA to RGB? It looks like convert method from Image module was used in README of OPEN_CLIP. Is there more efficient way? im = Image.open("cat.jpg").convert("RGB")