The ornamental design for an imagesensor, as shown and described.
FIG. 1 is a front perspective view of the front, left, and top sides of an image sensor showing our new design;
FIG. 2 is a rear perspective view of the rear, right, and bottom sides thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom view thereof.
The broken lines shown represent unclaimed subject matter of the image sensor and form no part of the claimed design. The dash-dot lines represent the boundary between the claimed design and unclaimed design.