Method and system for adjusting a projected image, and projection device

A system for adjusting a projected image, the system comprising:

• a projection device;
• and
• a number of recognition devices located in a space around a projection screen, the projection screen defining a rectangle, wherein:
• the projection device is configured to:
• transmit, to each zone in a projection range, positional information corresponding to the zone;
• receive position identifiers fed back by the recognition devices;
• and
• adjust the projection range to approximately coincide with the rectangular projection screen according to positions of the recognition devices and the position identifiers fed back by the recognition devices;
• adjust an aspect ratio of the projection range to the same aspect ratio as the projection screen;
• move the projection range so a center of the moved projection range overlaps with a center of the projection screen;
• and
• shrink the projection range;
• transmit to each zone in the shrunk projection range the positional information corresponding to the zone;
• determine whether the shrunk projection range overlaps with the projection screen according to the position identifiers fed back by the recognition devices;
• and
• in response to determining that the shrunk projection range does not overlap with the projection screen, returning to the process in which the projection device adjusts the projection range;
• wherein the recognition devices are configured to recognize the positional information transmitted by the projection device to each zone in the projection range, determine the position identifiers from the recognized positional information, and feedback the determined position identifiers to the projection device.

A method for adjusting a projected image, the method comprising:

• transmitting, by a projection device to each zone in a projection range, positional information corresponding to the zone;
• receiving, by the projection device, position identifiers fed back by recognition devices located in a space around a projection screen, the position identifiers determined by the recognition devices in response to recognizing the positional information transmitted by the projection device, the projection screen defining a rectangle and the recognition devices comprising at least four recognition devices located at four corners in the space around the projection screen;
• determining, by the projection device, row-wise compensation quantities corresponding to the recognition devices according to abscissas of the respective position identifiers, positions of the respective recognition devices, and a size of the projection screen;
• determining, by the projection device, column-wise compensation quantities corresponding to the recognition devices according to ordinates of the respective position identifiers, the positions of the respective recognition devices, and the size of the projection screen;
• and
• adjusting, by the projection device, the projection range to approximately coincide with the rectangular projection screen, according to positions of the recognition devices, the position identifiers fed back by the recognition devices, the determined row-wise compensation quantities and the determined column-wise compensation quantities;
• adjusting, by the projection device, an aspect ratio of the projection range to the same aspect ratio as the projection screen;
• moving, by the projection device, the projection range so a center of the moved projection range overlaps with a center of the projection screen;
• and
• shrinking, by the projection device, the projection range so the shrunk projection range overlaps with the projection screen.

A method for adjusting a projected image, the method comprising:

• transmitting, by a projection device to each zone in the projection range, positional information corresponding to the zone;
• receiving, by the projection device, position identifiers fed back by recognition devices located in a space around a protection screen, the position identifiers determined by the recognition devices in response to recognizing the positional information transmitted by the protection device, the projection screen defining a rectangle;
• adjusting, by the projection device, the projection range to approximately coincide with the rectangular projection screen according to positions of the recognition devices and the position identifiers fed back by the recognition devices;
• adjusting, by the projection device, an aspect ratio of the projection range to the same aspect ratio as the projection screen;
• moving, by the projection device, the projection range so a center of a moved projection range overlaps with a center of the projection screen;
• shrinking, by the projection device, the projection range;
• transmitting, by the protection device, to each zone in the shrunk projection range the positional information corresponding to the zone;
• determining, by the projection device, according to the position identifiers fed back by the recognition devices whether the shrunk projection range overlaps with the projection screen;
• and
• in response to determining that the shrunk projection range does not overlap with the projection screen, returning to the process in which the projection device adjusts the projection range.