Method for scanning selected target image area of document
A method for scanning a selected target image area of a document includes steps of establishing in a scanner a first optical path by a first focusing lens; using the first focusing lens to preview the document and select from the whole document image a selected image area; moving the first focusing lens out of the first optical path and move a second focusing lens into the optical path to establish a second optical path in the scanner; and using an optical scanning module in the scanner and the second focusing lens to scan the selected image area of the document to obtain the desired target image.
1 .- 7 . (canceled)
8 . A scanner, comprising:
a document supporting surface;
a first lens having a first optical power;
a first shifting mechanism coupled to the first lens to establish a first optical path between the first lens and a document disposed on the document supporting surface;
a second lens having a second optical power; and
a second shifting mechanism coupled to the second lens to establish a second optical path between the second lens and a document disposed on the document supporting surface.
9 . The scanner of claim 8 , further comprising:
circuitry to control the first lens and first shifting mechanism to obtain an image of a document disposed on the document supporting surface; and
circuitry to control the second lens and second shifting mechanism to obtain an image of a localized area of the document disposed on the document supporting surface.
10 . The scanner of claim 8 , further comprising:
a scanning light source to provide light to the document supporting surface; and
an image sensing device to receive light reflected from the document supporting surface and focused by one of the first or second lens.
11 . The scanner of claim 10 , wherein the first optical path includes the first lens, the document supporting surface and the image sensing device.
12 . The scanner of claim 11 , wherein the second optical path includes the second lens, the document supporting surface and the image sensing device.
13 . The scanner of claim 12 , wherein the first shifting mechanism is further adapted to move the first lens out of the second optical path.
14 . An apparatus, comprising:
means for scanning an object to obtain a first object image;
means for viewing the first object image;
means for selecting a localized area of the object from the first object image; and
means for scanning a localized area of the object to obtain a second object image comprising an image of the localized area of the object.
15 . An apparatus, comprising:
circuitry to control a first lens having a first optical power and a first shifting mechanism coupled to the first lens to obtain an image of an object;
circuitry to receive a selection of a localized area of the image of the object;
circuitry to control a second lens having a second optical power and a second shifting mechanism coupled to the second lens to obtain an image of a localized area of the object in accordance with the selection.
16 . The apparatus of claim 15 , further comprising:
a first shifting mechanism coupled to the first lens to establish a first optical path between the first lens, the object and an image sensing device; and
a second shifting mechanism coupled to the second lens to establish a second optical path between the second lens, the object and an image sensing device.
17 . The apparatus of claim 16 , wherein the first shifting mechanism is further adapted to move the first lens out of the second optical path.
18 . The apparatus of claim 16 , wherein the second shifting mechanism is further adapted to move the second lens out of the first optical path.
19 . An article comprising: a storage medium, having stored thereon instructions that, when executed, result in:
establishing a first optical path between a first lens and an object disposed on a scanner;
obtaining a first object image of the object;
displaying a preview image of the first object image;
selecting a localized area of the object from the displayed preview image;
establishing a second optical path between a second lens and the object disposed on the scanner;
scanning a localized area of the object to obtain a second object image comprising an image of the localized area of the object.
20 . The article of claim 19 , wherein the first optical path includes the first lens, the document supporting surface and the image sensing device.
21 . The article of claim 20 , wherein the second optical path includes the second lens, the document supporting surface and the image sensing device.
22 . The article of claim 21 , wherein the instructions, when executed, further result in:
shifting the first lens out of the first optical path prior to establishing the second optical path.