A video camera can be configured to highly compress video data in a visually lossless manner. The camera can be configured to transform blue and red image data in a manner that enhances the compressibility of the data. The data can then be compressed and stored in this form. This allows a user to reconstruct the red and blue data to obtain the original raw data for a modified version of the original raw data that is visually lossless when demosaiced. Additionally, the data can be processed in a manner in which the green image elements are demosaiced first and then the red and blue elements are reconstructed based on values of the demosaiced green image elements.
1. A video camera comprising:
a portable housing;
a lens assembly supported by the housing and configured to focus light;
a light sensitive device configured to convert the focused light into raw image data with a resolution of at least 2 k at a frame rate of at least about twenty-three frames per second;
a memory device; and
an image processing system configured to compress and store in the memory device the raw image data at a compression ratio of at least six to one and remain substantially visually lossless, and at a rate of at least about 23 frames per second.
2. A video camera according to claim 1 , wherein the light sensitive device includes a first group of sensor cells configured to detect a first color, a second group of sensor cells configured to detect a second color, and a third group of sensor cells configured to detect a third color, the third group of sensor cells comprising twice as many sensor cells as the second group of sensor cells.
3. A video camera according to claim 1 , wherein the memory device is disposed within the housing.
4. A video camera according to claim 1 , wherein the memory device is supported on the outside of the housing.
5. A video camera according to claim 1 , wherein the memory device is connected to the housing with a flexible cable.
6. A method of recording a motion video with a camera, the method comprising:
guiding light onto a light sensitive device of a camera;
converting the light received by the light sensitive device into raw digital image data having a horizontal resolution of at least 2 k at a rate of at least greater than twenty three frames per second;
compressing the raw digital image data into compressed digital image data such that the data remains substantially visually lossless upon decompression; and
recording the compressed digital image data at a rate of at least about 23 frames per second onto a storage device of the camera.
7. The method according to claim 6 , wherein the step of compressing the raw digital image data comprises compressing the raw digital image data to an effective compression ratio of at least 6 to 1.
8. The method according to claim 6 , wherein the step of compressing the raw digital image data comprises compressing the raw digital image data with an effective compression ratio of at least about 12:1.
9. The method according to claim 6 , wherein the step of recording comprises storing the compressed digital image data.
10. The method according to claim 6 , wherein the step of recording comprises recording the compressed digital image data at a rate of at least about 23.976 frames per second onto the storage device.
11. A video camera comprising:
a lens assembly supported by the housing and configured to focus light;
a light sensitive device configured to convert the focused light into a signal of raw image data representing the focused light and having a resolution of at least 2 k;
a memory device; and
means for compressing and recording the raw image data in the memory device at a frame rate of at least about 23 frames per second such that the image data remains substantially visually lossless upon decompression.
12. A video camera comprising:
a portable housing having at least one handle configured to allow a user to manipulate the orientation with respect to at least one degree of movement of the housing during a video recording operation of the camera;
a lens assembly comprising at least one lens supported by the housing and configured to focus light at a plane disposed inside the housing;
a light sensitive device configured to convert the focused light into raw image data with a horizontal resolution of at least 2 k and at a frame rate of at least about twenty three frames per second;
a memory device configured to store video image data;
an image processing system configured to compress and store in the memory device the raw image data at a compression ratio of at least six to one and remain substantially visually lossless, and at a rate of at least about 23 frames per second.