Abstract: An image extraction apparatus comprising a GPS receiver is provided. The apparatus comprises a lens, a sensor, a display device, a storage medium comprising an ecological database, an input device, a GPS receiver, a DSP unit, and a microprocessor. When a shooting signal from the input device is received, the microprocessor enables the sensor to receives an ecological image through the lens and transmits the ecological image to the DSP unit, obtains longitude and latitude corresponding to a current location of the image extraction apparatus through the GPS receiver, retrieves ecological data from the ecological database according to the longitude and latitude, enables the DSP unit to compare the ecological image and the ecological data, and displays comparison results on the display device.

Abstract: An image extraction apparatus comprising a GPS receiver is provided. The apparatus comprises a lens, a sensor, a display device, a storage medium comprising an ecological database, an input device, a GPS receiver, a DSP unit, and a microprocessor. When a shooting signal from the input device is received, the microprocessor enables the sensor to receives an ecological image through the lens and transmits the ecological image to the DSP unit, obtains longitude and latitude corresponding to a current location of the image extraction apparatus through the GPS receiver, retrieves ecological data from the ecological database according to the longitude and latitude, enables the DSP unit to compare the ecological image and the ecological data, and displays comparison results on the display device.

Abstract: A lens device includes a lens barrel, a lens, a guiding unit, and a positioning unit. The lens barrel has a barrel axis. The lens has a lens axis and is disposed between the lens barrel and the positioning unit. The guiding unit includes guiding studs and guiding slots formed on the lens barrel and the lens, wherein the guiding slots receive the guiding studs respectively therein and have dimensions larger than those of the guiding studs. The positioning unit has outer and inner ring sections. The outer ring section has a ring axis and is sleeved on the lens barrel. The inner ring section engages the lens such that the lens axis forms a radial offset with the ring axis, wherein the lens is positioned relative to the barrel axis by the inner ring section according to angular orientation of the inner ring section relative to the ring axis.

Abstract: A lens device includes a lens barrel, a lens, a guiding unit, and a positioning unit. The lens barrel has a barrel axis. The lens has a lens axis and is disposed between the lens barrel and the positioning unit. The guiding unit includes guiding studs and guiding slots formed on the lens barrel and the lens, wherein the guiding slots receive the guiding studs respectively therein and have dimensions larger than those of the guiding studs. The positioning unit has outer and inner ring sections. The outer ring section has a ring axis and is sleeved on the lens barrel. The inner ring section engages the lens such that the lens axis forms a radial offset with the ring axis, wherein the lens is positioned relative to the barrel axis by the inner ring section according to angular orientation of the inner ring section relative to the ring axis.