[go: up one dir, main page]

JPH0581951B2 - - Google Patents

Info

Publication number
JPH0581951B2
JPH0581951B2 JP58248596A JP24859683A JPH0581951B2 JP H0581951 B2 JPH0581951 B2 JP H0581951B2 JP 58248596 A JP58248596 A JP 58248596A JP 24859683 A JP24859683 A JP 24859683A JP H0581951 B2 JPH0581951 B2 JP H0581951B2
Authority
JP
Japan
Prior art keywords
image
calculation means
filtering
filter
data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP58248596A
Other languages
Japanese (ja)
Other versions
JPS60134991A (en
Inventor
Michitaka Honda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP58248596A priority Critical patent/JPS60134991A/en
Publication of JPS60134991A publication Critical patent/JPS60134991A/en
Publication of JPH0581951B2 publication Critical patent/JPH0581951B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Processing Or Creating Images (AREA)
  • Image Processing (AREA)
  • Character Input (AREA)

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は画像処理装置に関するものである。[Detailed description of the invention] [Technical field of invention] The present invention relates to an image processing device.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

従来より画像処理装置等において、画質の改善
や強調、ノイズ除去、特徴の抽出のために空間フ
イルタリング(以下、単に「フイルタリング」と
もいう)処理が行われている。
2. Description of the Related Art Conventionally, spatial filtering (hereinafter also simply referred to as "filtering") processing has been performed in image processing devices and the like to improve and enhance image quality, remove noise, and extract features.

一般に、水平方向にNピクセル、垂直方向にM
ピクセルの2次元領域から成るデイジタル画像デ
ータXに対し、(2K1+1)×(2K2+1)マトリク
スによる空間フイルタをかけた後の処理画像デー
タYは次式で表すことができる。
Generally N pixels horizontally and M vertically
Processed image data Y after applying a spatial filter using a (2K 1 +1)×(2K 2 +1) matrix to digital image data X consisting of a two-dimensional region of pixels can be expressed by the following equation.

Yi1,i2K=1k1=-K1 K=2k2=-K2 Ck1,k2i・Xi1-k1,i2-k2 ……(1) ここで、Y:処理後の画像データ X:処理前の画像データ (i1=0,1,…N i2=0,1,……
M) C:フイルタ係数 そして、フイルタリングの演算時間は、概算で
K1×K2に比例して大きくなり、通常K1K2であ
ることを考慮すれば、K1 2すなわち、かけようと
するフイルタの大きさの2乗に比例することにな
る。例えば、4×4の空間フイルタの演算時間に
対して16×16の空間フイルタは16倍もの時間を要
することになり、画像処理に長時間を要するとい
う問題を生じていた。
Y i1,i2 = K=1k1=-K1 K=2k2=-K2 C k1,k2i・X i1-k1,i2-k2 ...(1) Here, Y: Image data after processing X : Image data before processing (i 1 =0, 1,...N i 2 =0, 1,...
M) C: Filter coefficient And the calculation time for filtering is approximately
It increases in proportion to K 1 ×K 2 , and considering that it is usually K 1 K 2 , it is proportional to K 1 2 , that is, the square of the size of the filter to be applied. For example, a 16 x 16 spatial filter requires 16 times the calculation time of a 4 x 4 spatial filter, creating the problem that image processing takes a long time.

〔発明の目的〕[Purpose of the invention]

本発明は前記事情に鑑みて成されたものであ
り、原画像データに強力な空間フイルタリング処
理を施しているにもかかわらず、画像処理を高速
で行い得るところの画像処理装置の提供を目的と
する。
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an image processing device that can perform image processing at high speed even though the original image data is subjected to powerful spatial filtering processing. shall be.

〔発明の概要〕[Summary of the invention]

前記目的を達成するために本発明の概要は、取
り込まれる原画像に対してフイルタリング処理
し、フイルタリング処理後の画像を表示する画像
処理装置において、原画像を所定領域毎に平均化
することにより縮小する第1の演算手段と、この
第1の演算手段により縮小された画像に対してフ
イルタ演算を行う第2の演算手段と、この第2の
演算手段によりフイルタ演算された画像を前記原
画像の大きさに拡大する第3の演算手段と、この
第3の演算手段により拡大された画像を表示する
表示手段とを具備することを特徴とする画像処理
装置である。
In order to achieve the above object, the present invention provides an image processing apparatus that performs filtering processing on an original image to be captured and displays the image after the filtering processing, and averages the original image for each predetermined area. a first calculation means that performs a filter operation on the image reduced by the first calculation means; and a second calculation means that performs a filter operation on the image reduced by the first calculation means; This image processing apparatus is characterized by comprising a third calculation means for enlarging the image to the size of the image, and a display means for displaying the image enlarged by the third calculation means.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の実施例を図面を参照しながら説
明する。
Embodiments of the present invention will be described below with reference to the drawings.

ここで、先ず、この発明の原理について、第1
図及び第2図を参照しながら説明する。第1図a
に示すような時系列データXi(i=…−N,−N
+1,…−2,−1.0,1,2…N−1,N…)
に、同図bに示すフイルタCk(k=−K,−K+
1,…−1,0,1,…K−1,K)をかけ、同
図cに示すYiを求める場合(フイルタリングを施
す場合)、 Yi=Kk=-K Ck・Xi-k ……(2) により、Ck・Xi-kを2K+1回演算して求めるこ
とができる。
First, let's talk about the principle of this invention.
This will be explained with reference to the figures and FIG. Figure 1a
Time series data Xi (i=...-N, -N
+1,...-2,-1.0,1,2...N-1,N...)
Then, the filter C k (k=-K, -K+
1,...-1,0,1,...K-1,K) to find Y i shown in c in the same figure (when applying filtering), Yi= Kk=-K Ck・X ik ...(2), C k ·X ik can be calculated by calculating 2K+1 times.

ところで、第2図aに示すように時系列データ
XiのうちN個のデータ毎にそれらを平均化するこ
とによつて、同図bに示すようなデータjを得
る(プロセス1)。すなわち、i座標をN個毎に
まとめたj座標を考え、 j=1/NN-1n=0 Xi+o ……(3) (j=〔i/N〕) 上(3)式で得られるデータとするのである。(尚、
第2図ではN=3としている)。ここで〔 〕は
小数部を切り捨てることを意味する(以下、同
様)。
By the way, as shown in Figure 2 a, time series data
By averaging the N pieces of data out of X i , data j as shown in b of the figure is obtained (process 1). In other words, considering the j coordinate, which is a group of N i coordinates, j = 1/N N-1n=0 X i+o ...(3) (j = [i/N]) Above (3) This is the data obtained from the formula. (still,
In Figure 2, N=3). Here, [ ] means rounding down the decimal part (the same applies hereafter).

同様にフイルタCk(第1図b参照)においても
次式により平均化を行い、第2図cに示すような
フイルタ lを得る(プロセス2)。
Similarly, averaging is performed in the filter C k (see FIG. 1b) using the following equation to obtain the filter C l shown in FIG. 2c (process 2).

l=1/N(N/2)n=-(N/2) Ck+o ……(4) (l=〔k/N〕) 前記プロセス1で得たデータjに、前記プロ
セス2で得たフイルタlを用いてフイルタリン
グを施し、第2図dに示すようなデータjを得
る(プロセス3)。このフイルタリングは次式の
ように表わされる。
l = 1/N (N/2)n=-(N/2) C k+o ...(4) (l = [k/N]) The data j obtained in the process 1 is added to the process 2. Filtering is performed using the filter l obtained in step 3 to obtain data j as shown in FIG. 2d (process 3). This filtering is expressed as follows.

j(K/N)l=-(K-N) l(j-l) ……(5) ここで、フイルタリングの演算回数は2〔K/
N〕+1回となり、前(2)式によるフイルタリング
の演算回数2K+1回より少なくなる。
j = (K/N)l=-(KN) l(jl) ...(5) Here, the number of filtering operations is 2 [K/N]
N]+1 times, which is less than the number of filtering operations 2K+1 times according to the previous equation (2).

次に、j座標上で演算した結果(前(5)式による
フイルタリング後のデータを意味する)を、次式
に示す補間公式により、i座標に変換する(プロ
セス4)。
Next, the result of the calculation on the j coordinate (meaning the data after filtering according to the above equation (5)) is converted to the i coordinate using the interpolation formula shown in the following equation (process 4).

Y〜i=αj Y~ i = α j

Claims (1)

【特許請求の範囲】[Claims] 1 取り込まれる原画像に対してフイルタリング
処理し、フイルタリング処理後の画像を表示する
画像処理装置において、原画像を所定領域毎に平
均化することにより縮小する第1の演算手段と、
この第1の演算手段により縮小された画像に対し
てフイルタ演算を行う第2の演算手段と、この第
2の演算手段によりフイルタ演算された画像を前
記原画像の大きさに拡大する第3の演算手段と、
この第3の演算手段により拡大された画像を表示
する表示手段とを具備することを特徴とする画像
処理装置。
1. In an image processing device that performs filtering processing on a captured original image and displays the image after the filtering processing, a first calculation means that reduces the original image by averaging it for each predetermined area;
a second calculation means for performing a filter operation on the image reduced by the first calculation means; and a third calculation means for enlarging the image subjected to the filter operation by the second calculation means to the size of the original image. calculation means;
An image processing apparatus comprising: display means for displaying the image enlarged by the third calculation means.
JP58248596A 1983-12-23 1983-12-23 Picture processor Granted JPS60134991A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58248596A JPS60134991A (en) 1983-12-23 1983-12-23 Picture processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58248596A JPS60134991A (en) 1983-12-23 1983-12-23 Picture processor

Publications (2)

Publication Number Publication Date
JPS60134991A JPS60134991A (en) 1985-07-18
JPH0581951B2 true JPH0581951B2 (en) 1993-11-16

Family

ID=17180465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58248596A Granted JPS60134991A (en) 1983-12-23 1983-12-23 Picture processor

Country Status (1)

Country Link
JP (1) JPS60134991A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008029625A1 (en) 2006-09-08 2008-03-13 Sony Corporation Image processing device, image processing method, and program

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2604711B2 (en) * 1985-09-14 1997-04-30 ソニー株式会社 Image conversion device
JPH07117379B2 (en) * 1986-03-25 1995-12-18 アンリツ株式会社 Variable space filter
JP2744230B2 (en) * 1986-04-17 1998-04-28 キヤノン株式会社 Image processing device
JPS62245378A (en) * 1986-04-17 1987-10-26 Canon Inc Image processor
JPH07117380B2 (en) * 1986-07-18 1995-12-18 アンリツ株式会社 Light receiving conversion device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4929718A (en) * 1972-07-19 1974-03-16
JPS54136135A (en) * 1978-04-13 1979-10-23 Iryo Gijutsu Kenkyu Kaihatsu Zaidan Picture information processor
JPS5748153A (en) * 1980-09-04 1982-03-19 Ricoh Co Ltd Picture element density converting system
JPS5772465A (en) * 1980-10-23 1982-05-06 Canon Inc Digital signal converting device
JPS5884358A (en) * 1981-11-13 1983-05-20 Toshiba Corp Picture enlargement processor
JPS58181171A (en) * 1982-04-16 1983-10-22 Hitachi Ltd Parallel picture processing processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008029625A1 (en) 2006-09-08 2008-03-13 Sony Corporation Image processing device, image processing method, and program

Also Published As

Publication number Publication date
JPS60134991A (en) 1985-07-18

Similar Documents

Publication Publication Date Title
US8837854B2 (en) Image processing method for boundary resolution enhancement
JPH02503241A (en) Digital image noise suppression method using SVD block transform
CA1196091A (en) Non-linear filtering of gray scale images
JPH0581951B2 (en)
Safinaz et al. VLSI realization of Lanczos interpolation for a generic video scaling algorithm
CN112702515A (en) Image processing method, system and computer readable medium in camera system
JPS6219973A (en) Data compression method
JPH05135169A (en) Two-dimensional spatial filter circuit
CN110750757A (en) Image jitter amount calculation method based on gray scale linear modeling and pyramid decomposition
JPH0512437A (en) Image filtering method
WO2002093478A2 (en) A method and apparatus for executing an affine or non-affine transformation
JPS61107474A (en) Image reduction and conversion device
JPS63169171A (en) Reduced picture forming method
JPS63213086A (en) Two dimensional filter device
JPH0675576B2 (en) Ultrasonic image display device
JPS62280971A (en) Picture processing system
JP2604711B2 (en) Image conversion device
JPH0512956U (en) Image processing device
JPS592164A (en) Picture input device
JP2595501B2 (en) Image quality improvement device
CN109829865A (en) A kind of acceleration filtering method computing repeatedly progress by reducing
JPS61107473A (en) Image reduction and conversion device
JPH06274617A (en) Median filter processing method
JPS59200371A (en) Image signal processing method and device
JPH06303464A (en) Three-dimensional filtering method and circuit therefor

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees