Image domain compliance
View Patent ↗Systems and methods for generating domain-compliant image data. Domain-specific usage rights may be evaluated. The domain-specific usage rights may be associated with the transfer of particular encoded image data to a particular computing system other than the computing system. The domain-specific usage rights may specify maximum allowable spatial frequency content of the particular encoded image data. Domain-compliant image data may be generated by removing particular disallowable spatial frequency content from the encoded image data prior to transfer to the particular computing system.
1. A computer-implemented method, comprising:
receiving, by a computing system, a data stream of encoded packetized content;
identifying, by the computing system, a particular encoded packet of the data stream as having video content that requires electronic scrambling prior to export from the computing system to a different computing system;
determining, by the computing system, a particular threshold value that defines allowable spatial frequencies of video content within the particular encoded packet, the threshold associated with the export of packetized content from the computing system to the different computing system; and
applying a function to modify, by the computing system, discrete cosine transform (DCT) coefficients of the particular encoded packet that exhibit a matrix column or row index value greater than the particular threshold value to zero magnitude, and to modify DCT coefficients of the particular encoded packet that exhibit a matrix column or row index value less than the particular threshold value, and greater than a second threshold value that is different than the particular threshold value, to exhibit a finite magnitude less than a corresponding original magnitude, without completely decoding the particular encoded packet.
2. The method of claim 1 , further comprising preserving DCT coefficients of the particular encoded packet that exhibit a matrix column or row index value less than the particular threshold value without fully decoding the particular encoded packet.
3. The method of claim 1 , further comprising applying one of a power-law transfer function, an exponential transfer function, a linear transfer function; a weighted transfer function, and a raised-cosine transfer function to modify DCT coefficients of the particular encoded packet that exhibit a matrix column or row index value less than the particular threshold value and greater than the second threshold value.
4. The method of claim 1 , further comprising: determining that the particular encoded packet is associated with video interlacing; and implementing a DCT filter operation to modify each DCT coefficient, of the DCT coefficients, that are associated with horizontal image resolution.
5. The method of claim 1 , further comprising implementing a process preventing appearance of block-like artifacts within an image associated with the DCT coefficients.
6. The method of claim 1 , further comprising modifying one or more of the DCT coefficients to exhibit an absolute magnitude different from a corresponding original magnitude to simulate high frequency content.
7. The method of claim 1 , further comprising: identifying particular high frequency content; and modifying each of the DCT coefficients to zero magnitude.
8. The method of claim 1 , further comprising: identifying particular high frequency content; and removing each of the DCT coefficients.
9. The method of claim 1 , further comprising one of: streaming the particular encoded packet to the particular computing system over a network connection; and storing the particular encoded packet to a particular memory location of the computing system.