Abstract: A light generating device includes: an LED module that includes a number of LED groups each of which has a number of LEDs, a memory for storing drive current for a number of LED groups respectively, an LED module driving unit for driving one of the LED groups, a current controller for controlling the drive current flowing to the LED module driving unit to drive the selected LED group, a temperature sensor for sensing heat created from the selected LED group, an operation unit for calculating the correct drive current when LEDs in the selected LED group emit light, and a key input unit for selecting one of the LED groups or a number of LED groups. The light generating device increases the light emission efficiency.

Abstract: There is provided a method for performing digital processing on an image signal output from CCD image sensors with a CMYG color filter array, the method including converting a digital CMYG signal of 10 bits each into a first YCbCr signal of 10 bits each, by using color interpolation, converting the first YCbCr signal of 10 bits each into an RGB signal of 8 bits each by using interpolation, performing color correction on the RGB signal of 8 bits each and converting a color-corrected RGB signal of 8 bits each into a second YCbCr signal of 8 bits each in a format which complies with the ITU-601 format, encoding the second YCbCr signal of 8 bits each and converting an encoded second YCbr signal of 8 bits each into an analog video signal, and adjusting automatic exposure and automatic white balance, using the RGB signal of 8 bits each and the second YCbCr signal of 8 bits each.