US 2011/0032197 A1Published application

Information processing apparatus and control method of information processing apparatus

AssigneeCanon Kabushiki Kaisha

InventorYoshinobu Iida

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Abstract

An information processing apparatus comprises: a calculation unit configured to calculate differences between the display coordinates of the plurality of target touch marks and the coordinates converted by the conversion unit; a correction unit configured to calculate an average value with reference to the center of the display range from the differences calculated by the calculation unit, and to correct, using the average value, the coordinates converted by the conversion unit so that distances between the reference coordinates and the coordinates converted by the conversion unit become equal to each other; and an update unit configured to calculate new conversion coefficients required to correct displacements between the coordinates corrected by the correction unit and the display coordinates of the plurality of target touch marks, and to update the new conversion coefficients as conversion coefficients used in subsequent touch position detection of the touch panel.

Claims8

Dependent claims

An information processing apparatus, which updates conversion coefficients required to correct displacements between display coordinates of a plurality of target touch marks and touch detected coordinates on a touch panel by making a user touch the plurality of target touch marks displayed on a display panel via the touch panel, the apparatus comprising:

a display control unit configured to control to display the target touch marks at a plurality of coordinates having equal distances from reference coordinates with reference to a center of a display range on the display panel;
a conversion unit configured to convert the touch detected coordinates with respect to the target touch marks into coordinates on the display panel using predetermined conversion coefficients;
a calculation unit configured to calculate differences between the display coordinates of the plurality of target touch marks and the coordinates converted by the conversion unit;
a correction unit configured to calculate an average value with reference to the center of the display range from the differences calculated by the calculation unit, and to correct, using the average value, the coordinates converted by the conversion unit so that distances between the reference coordinates and the coordinates converted by the conversion unit become equal to each other;
and
an update unit configured to calculate new conversion coefficients required to correct displacements between the coordinates corrected by the correction unit and the display coordinates of the plurality of target touch marks, and to update the new conversion coefficients as conversion coefficients used in subsequent touch position detection of the touch panel.

3 more elements

Dependencies are inferred from the claim text.