Method for correcting for distortion of projected image, program for correcting image distortion, and projection-type image display device
An image distortion correction method is provided which is capable of correcting for distortion of a projected image by designating an arbitrary correction point by using a simple and easy operation without independently providing a display device and/or a pointing device. The distortion correction method includes a first step of displaying first to eighth correction function indicating marks corresponding to first to eighth correction functions to make corrections to first to fourth correction points on a screen, a second step of displaying the first correction function indicating mark corresponding to the first correction function selected by an operator on the screen in a highlighted manner, a third step of moving the first correction point to be corrected by the selected first correction function and to be displayed on the screen according to an instruction of the operator and of calculating a correction parameter corresponding to a moved distance, and a fourth step of correcting for distortion of projected image based on the correction parameter.
1. A method for correcting distortion of an image comprising image data, the method comprising:
displaying the image;
displaying at least one correction function indicating mark for an operator, the at least one correction function indicating mark corresponding to at least one point on the image;
allowing the operator to select one of the at least one correction function indicating marks;
calculating at least one correction parameter for the at least one point based on the correction function indicating mark selected by the operator; and
modifying the image data based on the calculated at least one correction parameter, wherein the operator inputs a movement amount for the at least one point and the movement amount is used to calculate the at least one correction parameter.
2. The method according to claim 1 , wherein a correction function indicating mark of the at least one correction function indicating marks corresponds to two points on the image.
3. The method according to claim 2 , wherein a correction parameter is calculated for the two points.
4. The method according to claim 1 , wherein the displaying the image comprises projecting an image from a projection unit.
5. The method according to claim 1 , wherein the correction parameter corresponds to a predefined range of motion for the at least one point on the image.
6. The method according to claim 2 , wherein the correction function indicating mark of the at least one correction function indicating marks simultaneously corresponds to two points on the image.
7. The method according to claim 4 , wherein the displaying the at least one correction function indicating mark for an operator comprises projecting the at least one correction function indicating mark from the same projection unit which projects the image.