fSpy

Thanks to fSpy, you can quickly extract camera parameters from an imaging viewpoint and use them to get the desired effect. It has still image camera matching capabilities that can be used to create interactive apps, video games, visual effects, animated films, and 3D printed models.

If you’ve ever tried to model directly from the reference image, you may know that configuring the right camera settings can be extremely frustrating and time-consuming.

fSpy allows you to define vanishing points within an image by matching line segments to axes. It uses these vanishing points to make estimations about the camera’s parameters. It is essential to keep in mind that some images will not work.

These include photos taken with lenses with severe distortion, such as fisheye lenses.

Pictures taken with perspective lens tampered 3D images rendered with an orthographic camera and stitched panorama images. The vanishing points on the image plane in this app converge at a 90-degree angle into the 3D space.

The utility calculates the camera’s position, focal length, and orientation in the 3D space according to the control points specified by the user. These calculations can be used to configure 3D creation and modeling applications, such as Blender.

To estimate the camera parameters, the x and y coordinates of vanishing points are used. Each vanishing point is determined by aligning two line segments that fall parallel on either side of the diminishing far-away object surfaces.

It is possible to copy and paste fSpy parameters into the target program, such as Blender, one by one without using a dedicated importer. It loads the camera parameters into the application.

You can follow a simple procedure to import fSpy to other 3D applications.

First, configure the viewpoint of the camera based on the input image dimensions. Next, set the camera background to the input image, camera view field, position, orientation, and principal point.

If the primary point falls precisely on the image midpoint, you can leave it to default.