custom resolution rendering abnormaly

Hi, thanks for your amazing work!

Does your work support modifying the resolution? I've attempted to change it, and while the framework can produce a result, it appears to have rendering errors. For instance, the rendered result at a 1280x720 resolution is very blurry. I have compared parameters such as cam_position, cam_rotation, view_matrix, proj_matrix, fovx, and fovy with the original 3DGS, and they can be matched accordingly. Despite my best efforts to resolve the issue, I have not been successful and remain unsure how to address it.

Could you give some suggestions? Looking forward to your reply.

[blxie]

• sence: garden
• resolution: 1280x720

FlashGS render result:

origin 3DGS render result:

changes of code: click this link

[MaxwellF1]

You should adjust the focal_x and focal_y according to the scaling ratio relative to the original resolution. And you can always use the set width and height in the computation without preserving the original resolution. Changing these attributes in the Camera class should work:

self.focal_x = camera_json['fx']*self.width/self.width_from_json
self.focal_y = camera_json['fy']*self.height/self.height_from_json

• sence: garden
• resolution: 1280x720

FlashGS render result:

origin 3DGS render result:

changes of code: click this link