Registration of electronic displays

A non-transitory computer readable medium (CRM) storing instructions for operating computing devices (CDs) to display an electronic document (ED), the instructions comprising functionality for:

• obtaining, by a first CD comprising a first touchscreen, a first plurality of screen coordinates associated with a first portion of a first gesture performed by a user;
• obtaining, by the first CD and from a second CD comprising a second touchscreen, a second plurality of screen coordinates associated with a second portion of the first gesture performed by the user;
• determining, by the first CD and based on the first plurality of screen coordinates and the second plurality of screen coordinates, an alignment of the first touchscreen and the second touchscreen, wherein the second CD is adjacent to the first CD;
• and
• displaying, by the first CD and based on the alignment, a first segment of the ED on the first touchscreen,
• wherein the second CD displays a second segment of the ED on the second touchscreen while the first segment is displayed, and
• wherein the second segment is offset from the first segment within the ED by an inter-screen distance between the first touchscreen and the second touchscreen,
• wherein the instructions for determining the alignment comprise functionality for:
• fitting the first plurality of screen coordinates and the second plurality of screen coordinates to a line,
• generating, by the first CD, a first timestamp associated with the first gesture leaving the first touchscreen;
• obtaining, by the first CD and from the second CD, a second timestamp associated with the first gesture entering the second touchscreen;
• determining an inter-screen time based on the first timestamp and the second timestamp;
• and
• obtaining a velocity of the first gesture and a slope of the line,
• wherein determining the alignment is further based on the inter-screen time, the velocity, and an arctangent of the slope but not the inter-screen distance, wherein the first gesture is a finger swipe.

A system for operating computer devices (CDs) to display an electronic document (ED), comprising:

• a first touchscreen associated with a first CD;
• a computer processor associated with the first CD;
• an initialization engine associated with the first CD that:
• obtains a first plurality of screen coordinates associated with a first portion of a gesture performed by a user;
• and
• obtains, from a second CD comprising a second touchscreen, a second plurality of screen coordinates associated with a second portion of the gesture performed by the user;
• an alignment engine executing on the computer processor that determines an alignment of the first touchscreen and the second touchscreen based on the first plurality of screen coordinates and the second plurality of screen coordinates, wherein the second CD is adjacent to the first CD;
• and
• a display engine associated with the first CD that displays, based on the alignment, a first segment of the ED on the first touchscreen,
• wherein the second CD displays a second segment of the ED on the second touchscreen while the first segment is displayed, and
• wherein the second segment is offset from the first segment within the ED by an inter-screen distance between the first touchscreen and the second touchscreen,
• wherein:
• the alignment is determined by at least fitting the first plurality of screen coordinates and the second plurality of screen coordinates to a line;
• the ED exceeds a width of the first touchscreen;
• and
• the ED is at least one selected from a group consisting of a webpage, a spreadsheet, a photograph, and a presentation slide,
• wherein the initialization engine also:
• generates a first timestamp associated with the gesture leaving the first touchscreen;
• obtains a second timestamp generated by the second CD and associated with the gesture entering the second touchscreen;
• determines an inter-screen time based on the first timestamp and the second timestamp;
• and
• obtains a velocity of the gesture and a slope of the line,
• wherein the alignment is further determined based on the inter-screen time, the velocity and an arctangent of the slope but not the inter-screen distance, the gesture is a finger swipe.

A method for operating computing devices (CDs) to display an electronic document (ED), comprising:

• obtaining, by a first CD comprising a first touchscreen, a first plurality of screen coordinates associated with a gesture performed by a user and a first timestamp associated with the gesture leaving the first touchscreen;
• obtaining, by the first CD and from a second CD comprising a second touchscreen, a second plurality of screen coordinates associated with the gesture and a second timestamp associated with the gesture entering the second touchscreen,
• wherein the first touchscreen and the second touchscreen are separated by an inter-screen distance, and
• wherein the second CD is adjacent to the first CD;
• fitting the first plurality of screen coordinates and the second plurality of screen coordinates to a line;
• determining a velocity of the gesture and a slope of the line;
• determining an inter-screen time based on the first timestamp and the second timestamp;
• determining, by the first CD, an alignment of the first touchscreen and the second touchscreen based on the first and second plurality of screen coordinates, the inter-screen time, the velocity, and an arctangent of the slope but not the inter-screen distance;
• and
• displaying, by the first CD and based on the alignment, a first segment of the ED on the first touchscreen,
• wherein the second CD displays a second segment of the ED on the second touchscreen while the first segment is displayed.