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| Number | Title | Issue Date |
| 5911012 | Method for the temporal filtering of the noise in an image of a sequence of digital images, and device for carrying out the method A method for the temporal filtering of a sequence of digitized noisy images includes the evaluation of an anti-causal filtered sample (PtA) in order to reconstruct a present noisy sample (ItP) of a given pixel i... | 06/08/1999 |
| 5903680 | Image data recursive noise filter with reduced temporal filtering of higher spatial frequencies An image data recursive noise filter wherein relatively high spatial frequency components of the image data are either not filtered at all or are filtered to a lesser degree than relatively low spatial frequency components of the image data. This minimize... | 05/11/1999 |
| 5896468 | Heuristic smoothing filter for digital maps Digital maps digitized by scanning paper maps are smoothed by identifying regions which should be of a uniform color, empirically selecting sets of colors which the pixels of a given region might have in the raw map, empirically determining the statistica... | 04/20/1999 |
| 5881179 | Frequency separation of image data Apparatus for frequency-separating input image data, the apparatus comprises a data buffer; a multi-stage filter for performing successive spatial filtering operations on input image data, the multi-stage filter having: (i) a first filtering stage for fre... | 03/09/1999 |
| 5872602 | Fluoroscopic imaging system with image enhancement apparatus and method The present invention comprises an apparatus and method for automatically controlling the degree of temporal integration in a real time video image processor. The degree of integration may be determined by a combination of image brightness detected over a... | 02/16/1999 |
| 5832135 | Fast method and apparatus for filtering compressed images in the DCT domain A method is described for filtering compressed images represented in the discrete-cosine-transform (DCT) domain. The filter includes three sparse, vertical submatrices which are sparse versions of the vertical filter components (VFCs) of a desired filter ... | 11/03/1998 |
| 5796868 | Object edge point filtering system for machine vision A system and method for filtering edge points in an edge image represented by an array of edge image coordinates each having an edge point magnitude. An edge map array is formed of edge map coordinates each assigned one of three edge indicator values indi... | 08/18/1998 |
| 5790692 | Method and means of least squares designed filters for image segmentation in scanning cytometry In an image segmentation system that processes image objects by digital filtration, a digital filter is defined. The digital filter includes a neighborhood operator for processing intensity values of neighborhoods of pixels in a pixel array. A first pixel... | 08/04/1998 |
| 5768405 | Digital image processing method for local determination of the center and the width of objects in the form of contrasting bands on a background Digital image processing method for local determination of the center and the width of objects in the form of contrasting bands on a background. A digital image processing method, for representation of objects in the form of contrasting bands of substanti... | 06/16/1998 |
| 5757362 | Recursive digital filter using fixed point arithmetic There is provided a digital processor that includes a recursive filter having means for using fixed point arithmetic for performing division. The recursive filter includes means for saving a remainder after each division and multiplication operation and f... | 05/26/1998 |
| 5737452 | Method of generating a threshold array A method of generating a threshold array made up of a plurality of dot profiles, each of which is made up of a plurality of black or white pixels, certain of the pixels in certain of the dot profiles being constrained to be either black or white. The step... | 04/07/1998 |
| 5715335 | Noise reduction In a noise reduction filter having a filter coupled to receive a plurality of input signal samples (.smallcircle.,.sym.) and furnishing noise-reduced signal samples, and a delay circuit coupled to the output of the filter and which furnishes a plurality o... | 02/03/1998 |
| 5689591 | Apparatus and method for noncausal, predictive, digital image compression The present invention is directed to an apparatus and method for converting a noncausal, two dimensional signal representative of a digitized image into an equivalent data format that can be filtered by recursive filters. The first step is to estimate an ... | 11/18/1997 |
| 5581667 | Electronic trapping system for digitized text and images A system for digitally trapping color images on a pixel-by-pixel is employed, whereby for each cyan, yellow, magenta and black color separation, an object-oriented trapping process is carried out. After each object is categorized, the original image is se... | 12/03/1996 |
| 5511155 | Method and device for synthesizing all-objects-in-focus images A method and apparatus for forming a synthesized optical image with all of the desired objects in focus. A prescribed number of optical images of the same scene are provided by recording an optical image at a respective focal distance and changing the foc... | 04/23/1996 |
| 5392211 | Image processing apparatus A frame image signal which is output cyclically is converted to a digital signal and input to a first multiplier in a digital filter. The first multiplier multiplies a digital image signal Yi of each frame by (1-a), and supplies the product (1-... | 02/21/1995 |
| 5271072 | Image reduction of binary images using filtering processing An image reduction system which reduces binary level images is disclosed. In the system, a reduction pixel value is determined by using, as reference pixels for a filter operation: a plurality of surrounding pixels including an object pixel to be reduced;... | 12/14/1993 |
| 4962542 | Method for reducing artifacts in error diffused images A method for use in a recursive spatial filter which interchanges the value of a control pixel with that of the value of a predetermined one of the surrounding pixels in a pixel mask when a specific image pattern occurs in the digital image. The use of su... | 10/09/1990 |
| 4956873 | Image processing apparatus In order to correct the swathe related banding effect often seen on swathe-scanned imagers a vertical smoothing function separates out artifact detail from the idealized image and derives, from this, proportional corrections for each channel within a swat... | 09/11/1990 |
| 4897795 | Digital image analysis system A digital image analysis system is disclosed in which a digital input image formed by a raster scan method is so modified as to fill up a hole in a clump and a recess at the bottom of a clump viewed in the sub-scanning direction of the raster scan method,... | 01/30/1990 |
| 4785409 | System for making standard deviations in quantum noise constant throughout a screen display A loop is constructed in which an output of a two-dimensional integrator is fed back through an exponential function unit for each pixel of a picture signal, a difference between the output and an input picture signal of the corresponding pixel of a next ... | 11/15/1988 |
| 4646355 | Method and apparatus for input picture enhancement by removal of undersired dots and voids A method and apparatus for removing undesirable dots and voids which are smaller than the user defined smallest data item of a bit-map image of a picture being scanned by a picture coding system. The bit-map is delayed as it is being generated to form a s... | 02/24/1987 |
| 4590582 | Image data processing apparatus for performing spatial filtering of image data In a digital radiographic technique, a spatial filtering process has been widely introduced. The image data processing apparatus includes a first storage device for storing original image data in a digital form which is used for medical diagnosis. A filte... | 05/20/1986 |
| 4330833 | Method and apparatus for improved digital image processing An improved method and apparatus for digital image processing is disclosed which permits greater efficiency in implementation of digital filtering techniques. In one implementation specially selected small generating kernels, or masks, are sequentially co... | 05/18/1982 |
