PFM to JBG Converter

Change PFM format to JBG with our free tool

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Privacy First

Convertio automatically deletes uploaded PFM files after processing and purges JBG results within 24 hours. Your data stays yours.

Cloud-Powered

PFM to JBG conversion runs on Convertio's infrastructure, not your machine. Your device stays fast while the server handles the heavy lifting.

Zero Install

Run the entire PFM to JBG conversion in your web browser. No downloads, plugins, or system requirements beyond an internet connection.

How to convert PFM to JBG

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose jbg or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your jbg file right afterwards

About formats

PFM (Portable Float Map) is a floating-point raster image format devised by Paul Debevec around 2001, designed to store high-dynamic-range image data with the simplicity of the Netpbm family of formats. PFM extends the PBM/PGM/PPM philosophy — minimal header, raw data, no compression — to 32-bit IEEE floating-point samples, providing direct access to HDR pixel values without the encoding overhead of formats like OpenEXR or the limited range of Radiance HDR's RGBE encoding. The file structure is deliberately minimal: a two-character magic number ('Pf' for grayscale, 'PF' for color), width and height on the next line, a scale/endianness indicator (negative for little-endian, positive for big-endian, with magnitude indicating scale factor), and then the raw 32-bit float data for each pixel. PFM files store one float per pixel for grayscale or three floats (RGB) per pixel for color, with no compression, alpha channel, or metadata support. The format emerged from the HDR imaging research community where Debevec's work on image-based lighting and light stage capture required a simple, unambiguous way to store linear floating-point radiance values that could be easily exchanged between research tools. One advantage is absolute simplicity for HDR data: PFM can be read and written in a few lines of code in any language that supports IEEE floats, with no library dependencies — ideal for research prototyping and quick data exchange between custom tools. The format's widespread adoption in the computer vision and computational photography research community is another practical strength — optical flow benchmarks (Middlebury), depth estimation datasets, and radiance field captures commonly use PFM. The format is supported by ImageMagick, OpenCV, HDR Shop, and Luminance HDR.
Developer: Paul Debevec
Initial release: 2001
JBG is a file extension for images compressed using the JBIG (Joint Bi-level Image experts Group) standard, formally ITU-T Recommendation T.82, completed in 1993 as a successor to the Group 3 and Group 4 fax compression standards. JBIG compression is designed for bi-level (black and white) images but can also handle grayscale and limited-color images by encoding each bit plane separately. The algorithm uses a form of arithmetic coding guided by an adaptive context model: for each pixel, the encoder examines a template of surrounding already-coded pixels to build a probability estimate, then feeds this estimate to a QM-coder (a variant of the Q-coder arithmetic coder) that produces a highly efficient binary output. JBIG achieves 20-40% better compression than Group 4 on typical document images, with the improvement being even larger on halftoned photographs and images with gradual density transitions where Group 4's simple run-length approach is less effective. The standard supports progressive encoding, where a low-resolution version of the image is transmitted first and progressively refined — useful for fax-like applications where the receiver can begin displaying the image before the full-resolution data arrives. One advantage is superior compression of documents containing halftone images: newspapers, magazines, and marketing materials that mix text with photographic halftones compress dramatically better with JBIG than with Group 3/4. The standard's ITU-T backing ensures it is implemented in document imaging hardware and software worldwide. JBG files are supported by ImageMagick and various document imaging tools.
Initial release: 1993

Frequently Asked Questions

Why convert PFM to JBG?

PFM files are niche and rarely supported outside scientific software. JBG offers broad compatibility across all platforms and applications.

What programs open JBG files?

JBG files can be opened in jbig-kit tools, IrfanView, and document imaging applications.

Does PFM to JBG conversion cost anything?

Basic conversions are completely free. If you need higher volume or larger data support, Convertio offers affordable premium options.

Is PFM to JBG conversion lossless?

The pixel data from your PFM source is mapped faithfully to JBG. Whether the result is lossless depends on the JBG format's compression method.

Does this work on Mac and Linux?

Convertio is entirely browser-based, so it works on macOS, Linux, Windows, and even mobile platforms without any software installation.

Is the conversion process fast?

Yes — PFM to JBG conversion on Convertio usually completes in seconds. Cloud-based processing handles the work without taxing your device.