Ramiro Polla spent nearly two decades as a core FFmpeg developer, fixing bugs in video codecs for a living. He had a habit, though: whenever a bug produced a visual glitch, he would stop and stare. That habit eventually became FFglitch — a multimedia bitstream editor that gives artists precise control over the mathematical internals of video and image codecs, now used across the global glitch art community. In July 2025, stuck on his main project, Polla completed what he called a side quest: ascii.jpeg. What it does is simple to say and hard to metabolize: it produces JPEG files whose compressed data payload is simultaneously readable plain-text ASCII. You feed it a poem. It outputs a file. Open that file in an image viewer and it renders as a pixelated image derived from the characters' binary encodings. Open it in a text editor and the poem is right there, word for word, exactly as typed. Both readings are correct. The file is valid under both.

To understand the structure, you need to look at JPEG's two core layers. The first is the DCT (discrete cosine transform): it converts image data into frequency coefficients, the visual language of JPEG, determining what survives quantization and what gets discarded. The second is Huffman coding: it compresses those DCT coefficients using variable-length codes defined in a Huffman table — the DHT, or Define Huffman Table block. Polla worked at the second layer. He designed a set of Huffman tables such that the binary encoding of printable ASCII characters — from 0x20 (space) to 0x7E (tilde) — maps cleanly onto valid Huffman code plus DCT coefficient pairs. The result: the scan data payload of the JPEG file (the actual compressed content, after the headers) can be written as raw ASCII text, and any standard decoder opens it as a valid image without complaint. The text is not hidden, not in a comment field, not in metadata. It is the image data itself — the mathematics the decoder uses to reconstruct color from the file.

The structural remainder here is the Huffman table itself — a component of the JPEG format that no one has ever treated as aesthetic material. JPEG's critical history runs deep: Rosa Menkman spent years building a vocabulary for JPEG artifacts, quantization noise, and the perceptual politics of frequency-domain compression. That vocabulary is now construct — named, institutionally received, with a stable place in the art world. But the DHT — the part that defines how to compress rather than what to compress — has always been pure infrastructure. Written by encoders, read by decoders, never examined. In a conversation with Menkman at Fubar, Polla heard her describe her project using ASCII in JPEG at the DCT level. His response was to notice the layer she hadn't reached: the Huffman table design itself. That is his chisel. He did not glitch the JPEG — he redesigned its compression dictionary to make the dictionary a poetic act. ascii.jpeg finds another layer of remainder inside an object that had already been analyzed as remainder. The chisel-construct cycle left sediment; this is the sediment.

ascii.jpeg remains in its remainder phase because no existing category fully contains it. It is not glitch art — the file is valid, no decoder protests. It is not steganography — the text sits in plain sight in the raw bytes, visible to anyone with a hex editor, hidden in no meaningful sense. It is not code poetry — the poem does not run; it is the mathematics the decoder uses to reconstruct color. It is not generative art — the process is deterministic and invertible, the poem determines the image and the image is the poem. The art world is approaching: FFmpeg's official account highlighted the interview, the Poetic Computation Club at Overflow Gallery in Liège invited Polla to present at its reinauguration, and the glitchLAB 2k26 workshop series — next session August 29, 2026 — is bringing it into active community discussion. But the name has not arrived. That is exactly when it is most alive as remainder.

SAE judgment asks us to find the remainder that is still growing — not to recognize beauty that has already been given a name. ascii.jpeg teaches something about how deep remainders can run: even inside a technical object that has been extensively analyzed as aesthetic material, another untouched layer can remain. Menkman's chisel-construct cycle left sediment at the DHT level — the layer her chisel didn't reach. Polla saw the sediment and struck it. Beyond every construct's boundary, there is another remainder. Correct judgment is the capacity to stop there and recognize its shape.

Han Qin (秦汉) · @hqinjarsy · SAE Judgment & Aesthetics