Segmentation of Compressed Documents

We present a novel technique for segmentation of a JPEGcompressed documentbased on block activity. The activity is measured as the number of bits spent to encode each block. Each number is mapped to a pixel brightness value in an auxiliary image which is then used for segmentation. We introduce the use of such an image and show an example of a simple segmentation algorithm, which was successfully applied to test documents. The desired region can be identi ed and cropped or replaced from the compressed data without decompressing the image.

• Type: Conference
• Year: 1997
• Where: ICIP
• Authors: Ricardo L. de Queiroz, Reiner Eschbach
• Keywords: ICIP 1997, Image Processing, Pixel Brightness Value, Simple Segmentation Algorithm