Monochromic image processing system and method for background removal according to dynamic data
AssigneePrimax Electronics Ltd.
InventorChun-Chia Huang
Life of this patent
Estimating the term…
Abstract
A monochromic image processing system and method for background removal according to dynamic data firstly obtain pixel histogram data in part of an image during a photo/text separation process. Afterwards, look-up tables for executing a background removal process are generated immediately to remove background noise of all images simultaneously. This method can solve the problem that in the multi-source document copy mode the background noise of all images cannot be removed at the same time in the prior art. It also increases the flexibility in the background removal process in various copy modes.
Claims16
A monochromatic image processing method of background removal according to dynamical data, the method comprising the steps of:
- using a photo/text separation module to read in an Nth pixel band containing M pixel blocks stored in a memory module in sequence at time T1;
- generating a block property for each pixel block in the M pixel blocks by photo/text separation module and storing them in the memory module, and generating pixel histogram data from the pixel data of pixel blocks with text property in the M pixel blocks and storing them in the memory module;
- using a dynamical look-up table generation module to determine black- and white-reference point sets corresponding to different copy modes according to the pixel histogram data and different parameters of mode properties;
- and
- using an image background removal module to select a look-up table corresponding to the block property of each pixel block in the M pixel blocks and simultaneously performing a background removal process for all pixel data on the Nth pixel band according to the look-up table at time T2;
- wherein at time T2 before all pixel data are processed, the photo/text separation module continues reading the (N+1)th pixel band containing M pixel blocks stored in the memory module for executing subsequent steps.
A monochromatic image processing system for background removal according to dynamical data, comprising:
- a memory module;
- a photo/text separation module, which is used to read in sequence an Nth pixel band containing M pixel blocks stored in the memory module for photo/text separation at time T1, generates a block property of each pixel block in the M pixel blocks, and generates pixel histogram data from the pixel blocks of text property and stores them in the memory module;
- a dynamical look-up table generation module, which determines the black- and white-reference point sets corresponding to different copy modes according to the pixel histogram data and different parameters of mode properties, thereby generating the corresponding look-up tables;
- and
- an image background removal module, which selects a look-up table according to the block property of each pixel block in the M pixel blocks in the memory module at time T2 and performs background removal for the M pixel blocks on the Nth pixel band according to the look-up table;
- wherein at time T2 before all pixel data are processed, the photo/text separation module continues reading the (N+1)th pixel band containing M pixel blocks stored in the memory module for executing subsequent steps.
Dependencies are inferred from the claim text.