Patent ID: 8509487

Claim:
A method for optically measuring a parameter of an object, said method comprising: electronically capturing a first segment of said object as a first frame of image data at a first time using a first imaging region of an image sensor array, said first imaging region being defined by a first set of photosensitive pixel elements of the image sensor array; electronically capturing a second segment of said object as a second frame of image data at a second time using a second imaging region of said image sensor array, said second imaging region being larger than said first imaging region, said second imaging region being defined by a second set of photosensitive pixel elements of the image sensor array, said second set of photosensitive pixel elements including a greater number of photosensitive pixel elements than said first set of photosensitive pixel elements; comparing said first frame of image data with portions of said second frame of image data to determine a potential matched portion from said portions of said second frame of image data; and determining a displaced distance of said object using the position of said potential matched portion within said second frame of image data and a reference initial position within said second frame of image data.