An image processing apparatus obtains a plurality of corresponding information items for registration of a first image and a second image of an object, calculates, in a case where the first image and the second image are registered using corresponding information items remaining after excluding at least one corresponding information item from the plurality of corresponding information items, a registration error that occurs at a position of the excluded corresponding information item, and estimates a registration error at an arbitrary position in a case where the first image and the second image are registered using the plurality of corresponding information items based on the calculated registration error.

A data processing unit receives a reference image (IMG1.sub.3D) of a deformable physical entity, a target image (IMG2.sub.3D) of said physical entity, and a first region of interest (ROI1.sub.3D) defining a first volume in the reference image (IMG1.sub.3D) representing a reference image element. The reference image (IMG1.sub.3D), the target image (IMG2.sub.3D) and the first region of interest (ROI1.sub.3D) all contain 3D datasets. In response to user commands (c1; c2), the data processing unit defines a first contour (C1.sub.2D) in a first plane through the target image (IMG2.sub.3D), which is presented to a user via a display unit together with graphic data reflecting the reference image (IMG1.sub.3D), the target image (IMG2.sub.3D) and the first region of interest (ROI1.sub.3D). The first contour (C1.sub.2D) is aligned with at least a portion of a first border (IEB1) of a target image element (IE.sub.3D) in the target image (IMG2.sub.3D). The target image element (IE.sub.3D) corresponds to the reference image element in the reference image (IMG1.sub.3D). Based on the first contour (C1.sub.2D), the target image (IMG2.sub.3D) and the first region of interest (ROI1.sub.3D); the data processing unit determines a second region of interest (ROI2.sub.3D) defining a second volume in the target image (IMG2.sub.3D).

Systems and methods for registering documents. A two-dimensional document image and one or more form images may be obtained. The document image may be projected onto a horizontal axis and a vertical axis to create a horizontal document projection and a vertical document projection. The form images may be projected onto the horizontal axis and the vertical axis to create a horizontal form projection and a vertical form projection. The horizontal document projection may be correlated with the horizontal form projection of the form images and the vertical document projection may be correlated with the vertical form projection of the form images. Correlation scores may be calculated based on the correlations.

Embodiments of the present invention are directed to beautifying freeform input paths in accordance with paths existing in the drawing (i.e., resolved paths). In some embodiments of the present invention, freeform input paths of a curved format can be modified or replaced to more precisely illustrate a path desired by a user. As such, a user can provide a freeform input path that resembles a path of interest by the user, but is not as precise as desired. Based on existing paths in the electronic drawing, a path suggestion(s) can be generated to rectify, modify, or replace the input path with a more precise path. In some cases, a user can then select a desired path suggestion, and the selected path then replaces the initially provided freeform input path.

The present invention relates to a method for registering and visualizing at least two images, the method comprising the steps of: measuring (S1) a navigation speed used by a user during a scrollable and/or zoomable visualization of a first image of the at least two images and comparing the navigation speed with a navigation speed threshold value; visualizing (S2) the first image by solving deformations of the first image using a first level of computational load, if the navigation speed is below the navigation speed threshold value; and visualizing (S3) the first image by solving deformations of the first image using a second level of computational load, if the navigation speed is above the navigation speed threshold value.

A method and apparatus for registering a first image having a first plurality of pixel values from a sensor having a plurality of pixels and a second image having a second plurality of pixel values of the plurality of pixels is disclosed. The method includes selecting a first image having a first plurality of pixel values and a second image having a second plurality of pixel values, grouping the first plurality of pixels according to a grid having a plurality of grid elements, each grid element having a plurality of pixels, determining a grid element displacement of the second image from the first image for each grid element of pixels, filtering the displacement of the second image from the first image to produce filtered valid grid element displacements and invalid grid element displacements, and determining a warping transform of each of the grid element displacements.

Disclosed herein are adapters configured to be optically coupled to a plurality of microscopes, said adapter comprising: a) a first microscope interface configured to optically couple a first microscope to an optical element in optical communication with an optical probe; b) a second microscope interface configured to optically couple a second microscope to the optical element in optical communication with the optical probe; and c) an optical arrangement configured to direct light collected from a sample with aid of the optical probe to (1) the first microscope and second microscope simultaneously, or (2) the first microscope or second microscope selectively.

Provided is a parallax minimization stitching method and apparatus using control points in an overlapping region. A parallax minimization stitching method may include defining a plurality of control points in an overlapping region of a first image and a second image received from a plurality of cameras, performing a first geometric correction by applying a homography to the control points, defining a plurality of patches based on the control points, and performing a second geometric correction by mapping the patches.

A method, system, and computer program product provide the ability to ink a drawing. A coarse original sketch is loaded. User input drawing an initial stroke over the coarse original sketch is accepted. A stroke smoothness of the initial stroke is measured. A similarity between the initial stroke and the coarse original sketch is measured to determine a snap affect. The stroke smoothness and the snap affect are combined. The initial stroke is automatically/dynamically, without additional user input, modified based on the combination.

In a magnetic resonance method and apparatus for determining a characteristic of an organ, a magnetic resonance sequence is executed in order to acquire temporally resolved magnetic resonance data pertaining to the organ. The magnetic resonance sequence includes at least one tagging module, which generates a sub-visual tag of the magnetic resonance data. The characteristic of the organ is determined in a processor using the sub-visual tag.