| 摘要 |
A video camera comprising: a portable housing; a lens assembly supported by the housing and configured to receive light; a light sensitive device configured to convert the light into digital raw image data with a resolution of at least 2k at a frame rate of at least about 23 frames per second; a memory device supported by the housing; and an image processing system configured to perform a pre-emphasis function on the digital raw image data, to compress the digital raw image data after performing the pre-emphasis function such that the digital raw image data remains substantially visually lossless upon decompression, and to store the compressed digital raw image data in the memory device at a rate of at least about 23 frames per second, wherein the pre-emphasis function comprises a curve defined by the function y=(x+c)^g, where 0.01<g<1 and c is an offset. |
