Abstract:
For performing a fingerprint security function in an electronic device having a camera unit, a focus of a lens in the camera unit is adjusted to a first focus level when a control signal set indicates a normal photograph mode. Alternatively, the focus of the lens in the camera unit is adjusted to a second focus level different from the first focus level when the control signal set indicates a fingerprint photograph mode. Thus, existing components of the built-in camera are used to minimize cost and time for production of the electronic device that performs the fingerprint security function.
Abstract:
Methods and apparatus for estimating an orientation are disclosed. Methods of estimating an orientation include: dividing a fingerprint image into first partial regions, measuring the gradient of each pixel of the fingerprint image, and estimating a representative orientation of each of the first partial regions; obtaining an improved fingerprint image by filtering the fingerprint image using a double orientation filter, and remeasuring the representative orientation of each of the first partial regions by remeasuring the gradient of each pixel of the improved fingerprint image; and dividing the first partial regions into second partial regions, and estimating the representative orientation of the second partial regions with respect to the curvatures of the first partial regions in response to the remeasured representative orientation of each of the first partial regions and the remeasured gradients of the pixels.
Abstract:
A block-based parallel image thinning method segments an input image into blocks, determines the block flag of each of the segmented blocks, and determines a preservation condition of an object pixel of a corresponding block. Then, the method determines a removal condition of the object pixel for which the preservation condition has been determined, removes the value of the object pixel satisfying the removal condition and sets the block flag. When all the blocks have been thinned, the method thins the processed image into one-pixel thickness using a post processing condition. Related systems and computer program products also are provided.
Abstract:
A device and process for controlling the automatic operations of a power excavator are disclosed. The device has a plurality of sensors for sensing the motions of the excavator's moving parts. The device also has a controller with discriminating means. The discriminating means operates the sensed data of the sensors and discriminates the automatic operation to be performed. The controller outputs the control signals to the excavator's moving parts for automatically performed the automatic operation. The control device further includes recognizable signal output means for converting the discriminated results into recognizable signals prior to outputting the discriminated results, and confirmation signal input means for confirming the discriminated results outputted from the recognizable signal output means.
Abstract:
In a Gabor filter, a modified Gabor mask function is generated from an original Gabor mask function. A convolution of an image is performed with the modified Gabor mask function to generate a filtered image. The modification of the original Gabor mask function to the modified Gabor mask function reduces a number of calculations during such a convolution.
Abstract:
A fingerprint region segmenting apparatus and methods thereof The fingerprint region segmenting apparatus may include at least one directional filter receiving an input fingerprint image and filtering the input fingerprint image to generate at least one directional image, a normalization unit normalizing the at least one directional image and a region classification unit dividing the normalized at least one directional image into a plurality of blocks and classifying each of the plurality of blocks. In an example, the classification for each of the plurality of blocks may be one of a foreground of the input fingerprint image and a background of the input fingerprint image. In an example method, a fingerprint may be segmented by segmenting a fingerprint image into a plurality of regions based on a plurality of directional images, each of the plurality of directional images associated with a different angular direction.
Abstract:
For performing a fingerprint security function in an electronic device having a camera unit, a focus of a lens in the camera unit is adjusted to a first focus level when a control signal set indicates a normal photograph mode. Alternatively, the focus of the lens in the camera unit is adjusted to a second focus level different from the first focus level when the control signal set indicates a fingerprint photograph mode. Thus, existing components of the built-in camera are used to minimize cost and time for production of the electronic device that performs the fingerprint security function.
Abstract:
A process for automatically controlling power excavators is disclosed. In the process, the motions of the working members in accordance with lever handling motions of an operator are stored in a controller and reproduced to approximately conduct the operation. The operational errors of the reproduced motions of the working members are corrected and compensated in accordance with newly inputted lever handling motions of the operator while approximately conducting the operation, thereby accomplishing the desired operation. The process optimally controls the excavators regardless of working conditions, thereby improving the operational precision of the excavators. The above process does not need to use any sensors.
Abstract:
A constant voltage generator having a substrate voltage pumping circuit, a voltage pumping circuit and a single oscillator for generating pulses to which the substrate voltage pumping circuit and the voltage pumping circuit are commonly responsive, reducing current consumption of a semiconductor memory device during a stand-by state thereof.
Abstract:
A method of determining acceptability of an image of a fingerprint to be analyzed, includes dividing the image into a plurality of blocks, determining a focus for each block, determining a validity of a block, the block being valid if the focus is sufficient, otherwise the block being invalid, totaling a number of valid blocks in the image, and determining a validity of the image, the image being valid if a number of valid blocks is sufficient.