Abstract:
본발명은중간엽줄기세포또는치수줄기세포의분화방법에관한것이다. 보다구체적으로는, 저주파의전자기장을중간엽줄기세포또는치수줄기세포에처리하여, 줄기세포를신경세포로분화시키는방법에관한것이다. 본발명에의한분화방법은성장인자추가에따른고비용의신경분화유도배지가아닌저가의배지에서도분화를유도할수 있으며, 본발명에의해분화된신경세포는뇌신경질환치료에유용하게사용될수 있다.
Abstract:
PURPOSE: An image sensor for edge extraction and a method for generating an edge image using the same are provided to minimize a storage device necessary for edge extraction, thereby reducing the size of the image sensor. CONSTITUTION: A low decoder unit(30) selects each row of a pixel array(10). A column control unit(20) is connected to a column data line. The column control unit controls signals transmitted from a unit pixel. A comparison unit(40) compares the signals from the unit pixel. A determination unit(60) determines an edge by the unit pixel when a sign of the comparison result value is changed on a straight line.
Abstract:
PURPOSE: A medical head lamp of tracking position of eyes is provided to perform accurately operation of the patient by automatically operating the radiation angle of a head lamp according to a doctor eye. CONSTITUTION: A main body(2) is attached to the head. A driving unit(4) is installed in one side of the main body and supplies a driving force. A position control unit(6) controls the position where the driving unit is attached A lamp unit(8) radiates light to one side according to the movement of the position control unit. A camera unit(10) takes a picture of an eye point. A controller(12) calculates the eye point and drives the driving unit according to the calculated eye point.
Abstract:
PURPOSE: A method for designing a threshold filter for lossless image compression, and an apparatus and method for compressing an image without loss using the filter are provided to improve a compression ratio of image with large data. CONSTITUTION: A pre-processing unit(10) processes input image through a DC-level shifting and tiling. A conversion unit(20) converts the processed image to a frequency band. A threshold filtering unit(30) selectively outputs a pixel value by comparing a pixel value included in a divided frequency sub band with the coefficient of the threshold filter. An entropy encoding unit(50) generates a compressed image through an entropy encoding of the filtered image.
Abstract:
PURPOSE: A method for designing a QMF(Quadrature Mirror Filter), a channel separating method, and a channel synthesizing method are provided to reduce errors by improving the filtering efficiency of pixel values in a boundary of an image. CONSTITUTION: A QMF bank system sets a low pass filter and a high pass filter(110). A system sets a half-band product filter to a z polynomial(120). The system converts the set half-band product filter to the product of the symmetric polynomial and the square of the low pass filter(130). The system calculates a second polynomial by the conversion of the set half-band product filter(140). The system determines a high pass filter(150).