초록 ▼

An image processing system for providing edge enhancement of low resolution binary image files processes the low resolution data in sections or windows using a binary edge enhancement processor unit to determine whether an edge transition or "kink site" occurs within each window. The edge enhancemen

An image processing system for providing edge enhancement of low resolution binary image files processes the low resolution data in sections or windows using a binary edge enhancement processor unit to determine whether an edge transition or "kink site" occurs within each window. The edge enhancement processor includes a decision matrix that identifies a pixel based on a calculated gradient magnitude and direction. In one operating mode, the original data in the window is replaced with edge enhanced gray-scale data stored in a look-up table if a kink site is identified. In a second operating mode original data is replaced with higher resolution binary data. To improve speed of operation of the processor, a set of criteria used for determining where enhancement pixels are to be generated has logic operators used for processing the criteria operated simultaneously with a bias provided favoring determinations having closer proximity towards a site likely to require image enhancements. In addition a raster line of pixels is separated into segments and each segment operated on in parallel.

대표청구항 ▼

[ What is claimed is:] [13.] An image data processing apparatus for generating enhanced image data, the apparatus comprising:means for providing a line of data representing pixels in segments for processing in each of respective plural channels,a decision matrix means in each of said respective chan

[ What is claimed is:] [13.] An image data processing apparatus for generating enhanced image data, the apparatus comprising:means for providing a line of data representing pixels in segments for processing in each of respective plural channels,a decision matrix means in each of said respective channels for comparing a respective window of pixel locations to a predetermined set of criteria including gradient values corresponding to the image data and generating a respective output signal indicative of the comparison; andmeans for generating respective enhanced image data in response to the respective output signal of the decision matrix means of the respective channel. [14.] An image data processing apparatus for generating enhanced image data, the apparatus comprising:decision matrix means for comparing a window of pixel data including gradient values corresponding to the image data to a predetermined set of criteria and generating a respective output signal indicative of the comparison, the decision matrix means including means operating to determine plural criteria simultaneously with the output signal determined in accordance with a bias towards a determination of a finding of closer proximity towards a site likely to require image enhancement. [27.] An image data processing apparatus comprising:means for providing a line of pixels in line segments for processing in plural channels;means in each of said channels for comparing a window of pixel data of an image including first binary image data of a first pixel resolution and gradient values corresponding to the image data to a predetermined set of criteria and generating a signal indicative of the comparison; andmeans for generating second binary image data of a second pixel resolution that is higher than said first resolution in response to the signal. [31.] An image data processing apparatus comprising:means for comparing a window of pixel data of an image including first binary image data of a first pixel resolution and gradient values corresponding to the image data to a predetermined set of criteria and generating a signal indicative of the comparison and wherein the comparing means includes a decision matrix means for comparing the window of pixel data to the predetermined set of criteria and generating the respective signal indicative of the comparison, the decision matrix means including means operating to determine plural criteria simultaneously with the signal determined in accordance with a bias towards a determination of a finding of closer proximity towards a site likely to require image enhancement; andmeans for generating second binary image data of a second pixel resolution that is higher than said first resolution in response to the signal.