# Transform Results

Use the Transform tab to view details of the 2D transformation as calculated by the tool.

The tab contains the following fields:

Field | Description
--- | ---
Transform list | The list displays one or more of the following transform types that the tool has calculated: CogTransform2DCameraCalibration if the computation method is ThreeParamRadialWarp, SineTanLawProjectionWarp, or NoDistortionWarp. CogTransform2DLinear for a linear transform with or without origin adjustment CogTransform2DPerspectiveAndRadial for a nonlinear transform without origin adjustment CogTransform2DPerspectiveAndRadial and CogTransform2DLinear for a nonlinear transform with origin adjustment
Planar Perspective Transform | These values describe the planar perspective properties of the uncalibrated to raw calibrated transform. These fields are disabled if the computation method is Linear, ThreeParamRadialWarp, SineTanLawProjectionWarp or NoDistortionWarp.
Linear Transform | These values vary depending on the type of 2D transformation the tool calculated, in the following ways: For a linear transformation these values indicate the entire transform from calibrated to uncalibrated space. For a nonlinear transformation without an adjustment, it is the final linear portion of the perspective and radial transform that maps from raw calibrated to uncalibrated space. For a nonlinear transformation with an adjustment, these values represent both the transform described previously and the linear adjustment transform that maps from raw calibrated space to calibrated space, depending upon the selection made in the Transform list. For ThreeParamRadialWarp, SineTanLawProjectionWarp, and NoDistortionWarp, these values are not available.
ComputedRMSError | This is the error between the uncalibrated points and the mapped raw calibrated points, expressed in uncalibrated space. In most cases, a large RMS error indicates that you have specified a linear transformation when the calibration image exhibits significant perspective or radial distortion.