Recommended
More Related Content
Similar to Real-time HDR compressing
Similar to Real-time HDR compressing (20)
Recently uploaded
Recently uploaded (20)
Real-time HDR compressing
- 1. Real time HDR image compression Site: http://kanyevsky.kpi.ua Sergiyenko А.М., d-r of science Lepekha V.L. Simonenko A.V.
- 2. 1. HDR image compression а) б) Without compression With compression
- 3. 2. Modern video chips with high dynamic range (HDR) Output code К1 К2 ADC maximum Linear output Compressed signal Exposition Т1 Exposition Т2 Exposition Т3 Inverse transfer factor 2048 65536 220 4000 3040 2048
- 4. 3. Retinex algorithm I(x) F S * I’(x)R’(x)R(x) L(x) L’(x) Log x
- 6. 4. Adaptive brightness computing LPF
- 7. 5. Experimental board Helion HDR-60 programmed as the vision system Video computing 1280х720 60 Hz, 20 digits per color
- 8. Helion HDR-60 Lattice ECP-3 LFE3-70EA MT9M024 DECOMP GIST NORM1 COL_FILTR5 MEDIANF_3X3 BW MUX HDR_FILTR53 COLOR_REST TXT_FRAME TMDS_ENC U_I2C HDTV display SYNCHRO PCS_IO … Hardware of FPGA volume available % CLB slices 8563 33264 25,7 Registers 5694 66528 8,6 MPUs 18х18 34 128 26,6 BlockRAMs 1024х18 56 240 23,3 5. Experimental board Helion HDR-60 programmed as the vision system
- 9. Conclusions A simplified HDR-compression algorithm is proposed, which uses the local property analysis function except the bilateral function The vision system for the HDR-compression is developed, which compresses the HDR video images from 120 db to 48 db without sharpness losses both in white and in dark areas without artefacts. The system is intended for FPGA implementation, and has small hardware volume.