Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your ICB images to JPM format. This tool works for both professionals and casual users. Convert your images to JPM in seconds.
Targa ICB
A legacy extension for Targa images created by Truevision ICB boards.
The ICB file extension is functionally identical to the standard TGA (Truevision Targa) format. It was specifically used to denote images created by or for the Truevision Image Capture Board (ICB). Like standard TGA files, it supports simpler raster data with optional RLE compression and alpha transparency.
An ICB file respects the TGA 2.0 specification. It contains a header defining image dimensions and pixel depth, followed by pixel data. The pixel data can be uncompressed or RLE-compressed. It supports bit depths of 8, 16, 24, and 32 bits. In 32-bit mode, 8 bits are dedicated to an alpha channel, which was a pioneering feature for video overlay graphics.
Truevision (now part of Avid) introduced the Targa video boards for IBM PC-compatibles in the 1980s. To distinguish files created by different hardware models, they used specific extensions: .tga (generic), .icb (Image Capture Board), .vda (Video Display Adapter), and .vst (Video Super TarGA). Modern software treats them all as standard TGA files.
JPEG 2000 Compound Image
JPEG 2000 for multi-layer documents.
JPM (JPEG 2000 Part 6) is a compound image file format. It is designed for storing document images that contain a mix of text and graphics, using a Mixed Raster Content (MRC) model. It allows for different compression methods to be applied to different 'layers' of the image (e.g., sharp edges for text, smooth gradients for photos).
JPM splits an image into multiple layers (e.g., background, foreground mask, foreground color). Each layer can be compressed differently (e.g., JBIG2 for text mask, JPEG 2000 for background photos), optimizing both quality and file size for scanned documents. This is significantly more efficient than compressing an entire scanned page as a single JPEG 2000 image.
Part of the JPEG 2000 standard (ISO/IEC 15444-6), specifically targeting the document archival market.
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