CID to RGB Converter

Produce SGI RGB images from CID-keyed font glyphs online

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VFX Pipeline Ready

SGI RGB is a staple in visual effects and film production. Your CID font character renders fit directly into professional VFX workflows.

CID to SGI Format

Transform CID-keyed CJK font glyphs into SGI RGB images for use as textures, overlays, or graphic elements in 3D and VFX projects.

Confidential Handling

Uploaded CID fonts are deleted after processing. RGB outputs are purged within 24 hours to protect your font and project data.

How to convert CID to RGB

1

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

2

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

3

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

About formats

CID (Character Identifier) is a font architecture developed by Adobe Systems and specified in June 1993 to address the challenges of fonts containing very large glyph sets, particularly for CJK (Chinese, Japanese, Korean) scripts. Traditional PostScript fonts identify glyphs by name, which becomes impractical when a font contains tens of thousands of characters — a typical Japanese font may include over 20,000 glyphs. CID-keyed fonts replace glyph names with numeric identifiers organized by a character collection and ordering (such as Adobe-Japan1 or Adobe-GB1), dramatically reducing overhead for glyph access and subsetting. The architecture defines three PostScript font types: Type 9 (CID-keyed Type 1 outlines), Type 10 (CID-keyed Type 3), and Type 11 (CID-keyed Type 42/TrueType). A primary advantage is efficient handling of massive character sets — the numeric CID approach eliminates the memory and processing cost of maintaining thousands of glyph name strings. CID fonts also support sophisticated CMap resources that map encoding values to CIDs, enabling a single font to serve multiple encoding schemes (Unicode, Shift-JIS, Big5) without duplicating glyph data. The architecture integrates well with PDF subsetting, allowing documents to embed only the glyphs actually used. CID-keyed technology laid the foundation for CJK support in both OpenType and modern PDF workflows, and remains active in print production and document processing systems worldwide.
Developer: Adobe Systems
Initial release: June 11, 1993
RGB is a raw (headerless) image format that stores pixel data as a flat sequence of red, green, and blue sample values with no container structure, compression, or metadata. Each pixel is represented by three consecutive bytes (in 8-bit mode) — one for red intensity, one for green, and one for blue — written in scanline order from the top-left corner of the image to the bottom-right. Because there is no header, the image dimensions and bit depth must be specified externally when reading the file. The format supports multiple bit depths: 8-bit (0-255 per channel), 16-bit (0-65535 per channel), and floating-point variants, with 8-bit being the most common. The RGB color model itself reflects how display hardware produces color — by mixing red, green, and blue light at varying intensities — and raw RGB files represent this model in its most direct digital form. With 8-bit channels, three bytes per pixel yield a 24-bit color palette capable of representing 16,777,216 distinct colors. One advantage is zero-overhead processing: without headers or compression to parse, raw RGB data can be memory-mapped, fed directly into GPU textures, or piped between processing stages with minimal latency — valuable in real-time imaging, scientific instrumentation, and computer vision pipelines where every millisecond matters. The format's universal simplicity provides another practical strength — any programming language can read or write raw pixel data with just basic file I/O, making it a reliable interchange format between custom software that may not share support for structured image containers. Raw RGB files are handled by ImageMagick, FFmpeg, and various scientific and graphics tools.
Initial release: 1990

Frequently Asked Questions

Why convert CID to RGB?

SGI RGB is used in film, VFX, and 3D studios. Convert CID font characters to RGB for texture work and graphics in SGI-based pipelines.

How do I open RGB images?

Photoshop, GIMP, XnView, and SGI workstation tools open the format. 3D applications like Maya and Houdini also import SGI RGB textures.

Does RGB support alpha channels?

SGI format supports RGBA (4 channels). CID glyph renders can include transparency for compositing over other imagery.

Is SGI RGB compressed?

SGI RGB supports optional RLE compression. Both compressed and uncompressed modes preserve glyph render quality without lossy artifacts.

Is CID to RGB free on Convertio?

Completely. Upload your CID font, convert to SGI RGB, and download — no fees or registration required.