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DPX (Digital Picture Exchange) is the SMPTE 268M professional cinema format, storing 10-bit or 16-bit per channel imagery with logarithmic color encoding for maximum dynamic range. DPX is the standard interchange format across the VFX and digital intermediate pipeline — Nuke, Flame, DaVinci Resolve, and Baselight all work natively with DPX sequences. PNG (Portable Network Graphics) is the lossless web image format supporting 8-bit or 16-bit color depth with full alpha transparency.
Converting DPX to PNG produces lossless, widely viewable frame images from cinema-grade source material. PNG is the best general-purpose output format for DPX conversion because it preserves maximum quality (lossless compression), supports 16-bit depth (retaining more of DPX's dynamic range than 8-bit formats), and is viewable in every web browser and image application.
PNG's 16-bit per channel mode preserves significantly more of DPX's dynamic range than 8-bit formats like JPEG or BMP. For VFX review, editorial reference, and production stills where tonal quality matters, 16-bit PNG retains the subtle gradations in shadows, highlights, and skin tones that 8-bit conversion loses. This makes PNG the highest-quality practical format for DPX frame extraction.
Web-based production tools (ShotGrid/Flow, Frame.io, cineSync) display PNG natively in the browser. Converting DPX frames to PNG enables upload to these collaboration platforms without quality-degrading JPEG compression. Review notes, annotations, and approvals happen on PNG frames that preserve more of the original DPX quality than any lossy alternative.
The DPX header is parsed for image dimensions, bit depth, color encoding, and orientation. ImageMagick or Sharp performs log-to-linear conversion using a Cineon-to-sRGB LUT. For 16-bit PNG output, the conversion preserves 16 bits per channel from the source (10-bit DPX is expanded to 16-bit). For 8-bit PNG output, standard tone-mapping is applied. PNG compression uses DEFLATE with optimized filter selection per scanline. Alpha channel is preserved if present in the DPX source. The full spatial resolution of the DPX frame is maintained.
PNG is lossless — after the log-to-linear color space conversion, every pixel is preserved exactly. At 16-bit output, PNG retains most of the DPX's tonal range (65,536 levels per channel vs. DPX's 1,024 at 10-bit or 65,536 at 16-bit). At 8-bit, the 256-level tonal range is more limiting but sufficient for most viewing purposes. The log-to-linear conversion quality depends on the LUT used — a proper film stock LUT produces more accurate results than the generic Cineon curve. Spatial resolution is fully preserved at 2K or 4K.
| Device | DPX | PNG |
|---|---|---|
| Windows PC | Partial | Native |
| macOS | Partial | Native |
| iPhone/iPad | Partial | Native |
| Android | Partial | Native |
| Linux | Partial | Native |
| Web Browser | No |
DPX to PNG is the highest-quality practical conversion for cinema frame extraction. The lossless output with optional 16-bit depth preserves more of the source's dynamic range than any lossy format, and PNG's universal viewability makes the frames accessible across all platforms.
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| Native |
Mọi trình duyệt, mọi thiết bị
| Tính năng | DPX | PNG |
|---|---|---|
| Tên đầy đủ | Digital Picture Exchange | Portable Network Graphics |
| Phần mở rộng | .dpx | .png |
| Phù hợp nhất cho | Film industry standard | Lossless quality |