Image processing apparatus and control method therefor
This invention improves the operability of an apparatus when the user focuses on the target object to obtain an image with an appropriate image quality. An image capturing apparatus includes an object detection unit, which detects an object from an image based on a signal output from an image sensor, a display unit which displays a marker corresponding to the position of the object detected by the object detection unit, and a change unit which changes the position of the marker displayed on the display unit. The change unit moves the marker to the position of an object detected by the object detection unit, that is different from the current position of the marker displayed on the display unit.
1. An image capturing apparatus comprising:
an object detection unit which detects an object from image signals generated based on output signals from an image sensor;
a selection unit which selects one object position as an object position to be focused from plurality of object positions detected in one image signal by said object detection unit, said selection unit making a display unit, which displays images using the image signals, display a marker based on the selected object position; and
a change member which makes said selection unit select an object position which is different from the object position selected by said selection unit,
wherein in a case that a plurality of object positions are detected by said object detection unit when an instruction to move a position of the marker is issued by said change member, said selection unit newly selects an object position, which is nearest to a previous position of the object previously detected from a previous image and corresponding to the marker currently displayed on the display unit, from the plurality of object positions which are detected by said object detection unit and satisfy a predetermined condition, wherein the predetermined condition includes a status that the plurality of object positions are away from the previous position of the object by a predetermined distance, and said selection unit makes said display unit display the marker based on the newly selected object position.
2. An apparatus according to claim 1 , wherein said object detection unit detects a face from the image signal, and said display unit displays a marker corresponding to a position of the face detected by said object detection unit.
3. An apparatus according to claim 1 , wherein said object detection unit detects the object from the image asynchronously with an operation timing of said change member.
4. An apparatus according to claim 1 , wherein the predetermined condition includes a status that the plurality of object positions exist a predetermined side of the previous position of the object.
5. An apparatus according to claim 1 , wherein the predetermined condition includes a status that the plurality of object positions correspond to objects whose reliability is not less than a predetermined value.
6. An apparatus according to claim 1 , wherein the predetermined condition includes a status that the plurality of object positions correspond to objects whose size is not less than a predetermined size.
7. An apparatus according to claim 1 , wherein the predetermined condition includes a status that the plurality of object positions correspond to objects whose size difference from a size of the object corresponding to previous position of the object is less than a predetermined value.
8. A method of controlling an image capturing apparatus, comprising:
an object detection step of detecting an object from image signals generated based on output signals from an image sensor;
a selection step of selecting one object position as an object position to be focused from a plurality of object positions detected in one image signal by said object detection step, said selection step making a display unit, which displays images using the image signals, display a marker based on the selected object position; and
a change step of making said selection step select an object position which is different from the object position selected by said selection step,
wherein in a case that a plurality of object positions are detected by said object detection step when an instruction to move a position of the marker is issued by said change step, said selection step newly selects an object position, which is nearest to a previous position of the object previously detected from a previous image and corresponding to the marker currently displayed on the display unit, from the plurality of object positions which are detected by said object detection step and satisfy a predetermined condition, wherein the predetermined condition includes a status that the plurality of object positions are away from the previous position of the object by a predetermined distance, and said selection step makes said display unit display the marker based on the newly selected object position.