Week 4ELE 774 - Adaptive Signal Processing 1 LINEAR PREDICTION.
Digital Signal Processing ( week 15 )
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Transcript of Digital Signal Processing ( week 15 )
![Page 1: Digital Signal Processing ( week 15 )](https://reader035.fdocuments.net/reader035/viewer/2022062321/5681361c550346895d9d90f1/html5/thumbnails/1.jpg)
Digital Signal ProcessingDigital Signal Processing( week 15 )( week 15 )
![Page 2: Digital Signal Processing ( week 15 )](https://reader035.fdocuments.net/reader035/viewer/2022062321/5681361c550346895d9d90f1/html5/thumbnails/2.jpg)
Digital Image Processing Digital Image Processing LAB.LAB.
프로젝트 12. 14( 목 ) 오후 7:00 홈페이지 : image.dgu.ac.kr/~cswon
만약 다운로드 안 될시 , F302 에 찾아오세요 ..
공지사항공지사항
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Digital Image Processing Digital Image Processing LAB.LAB.
Warming Up Warming Up
필터 적용 예 ) 영상
시 작
끝
파일 열기 / 읽기
파일 저장 / 닫기
??
file_id = fopen(‘ 파일명 ');data = fread(file_id, [512, 512]);
fwrite(file_id, data, 8);fclose(file_id);
…
< m-file >
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Digital Image Processing Digital Image Processing LAB.LAB.
Warming Up Warming Up
필터 적용 예 ) 음성
시 작
끝
파일 열기 / 읽기
파일 저장 / 닫기
??
[wav_data, Fs, Nbits]=wavread(‘ 파일명 .wav');
wavplay(wav_data);wavwrite(wav_data, Fs, Nbits, ’ 파일명 .wav’);
…
< m-file >
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Digital Image Processing Digital Image Processing LAB.LAB.
Warming Up Warming Up
Pixel Quantization round( ) - 반올림 fix( ) - ‘0’ 을 향하여 양자화 floor( ) - minus infinity 쪽으로 양자화 ceil( ) - plus infinity 쪽으로 양자화 hist( ) – histogram clip( ) – clipping
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Digital Image Processing Digital Image Processing LAB.LAB.
Histogram Histogram
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Digital Image Processing Digital Image Processing LAB.LAB.
영상 반전 영상 반전
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Digital Image Processing Digital Image Processing LAB.LAB.
영상 반전 영상 반전
< Original Image > < 반전영상 >
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Digital Image Processing Digital Image Processing LAB.LAB.
ClippingClipping
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Digital Image Processing Digital Image Processing LAB.LAB.
ClippingClipping
< Original Image > < Clipped Image >
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Digital Image Processing Digital Image Processing LAB.LAB.
Running averaging Running averaging filterfilter
% 영상의 256 번째 줄 선택
% 7-point running filter 생성% filter 적용
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Digital Image Processing Digital Image Processing LAB.LAB.
< Original Signal > < Filtered Signal >
Running averaging Running averaging filterfilter
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Digital Image Processing Digital Image Processing LAB.LAB.
Running averaging Running averaging filterfilter
< X 축으로 필터링 > < Y 축으로 필터링 >
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Digital Image Processing Digital Image Processing LAB.LAB.
< Original Image >
Running averaging Running averaging filterfilter
< X-Filtered >
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Digital Image Processing Digital Image Processing LAB.LAB.
< Original Image > < Y-Filtered >
Running averaging Running averaging filterfilter
![Page 16: Digital Signal Processing ( week 15 )](https://reader035.fdocuments.net/reader035/viewer/2022062321/5681361c550346895d9d90f1/html5/thumbnails/16.jpg)
Digital Image Processing Digital Image Processing LAB.LAB.
Running averaging Running averaging filterfilter
< X-Y 축으로 필터링 >
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Digital Image Processing Digital Image Processing LAB.LAB.
< Original Image > < XY-Filtered >
Running averaging Running averaging filterfilter
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Digital Image Processing Digital Image Processing LAB.LAB.
Frequency Content of an Image Frequency Content of an Image (1)(1)
FIR 생성
< FIR 필터 >
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Digital Image Processing Digital Image Processing LAB.LAB.
FIR 특성
< 필터 계수 ( 임펄스 응답의 계수 ) > < 주파수 응답 >
Frequency Content of an Image Frequency Content of an Image (1)(1)
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Digital Image Processing Digital Image Processing LAB.LAB.
영상에 필터 적용
< 필터 생성 >
Frequency Content of an Image Frequency Content of an Image (1)(1)
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Digital Image Processing Digital Image Processing LAB.LAB.
Frequency Content of an Image Frequency Content of an Image (2)(2)
FIR 생성
< FIR 필터 >
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Digital Image Processing Digital Image Processing LAB.LAB.
FIR 특성
< 필터 계수 ( 임펄스 응답의 계수 ) > < 주파수 응답 >
Frequency Content of an Image Frequency Content of an Image (2)(2)
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Digital Image Processing Digital Image Processing LAB.LAB.
영상에 필터 적용
< 필터 생성 >
Frequency Content of an Image Frequency Content of an Image (2)(2)
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Digital Image Processing Digital Image Processing LAB.LAB.
Frequency Content of an Image Frequency Content of an Image (3)(3)
FIR 생성
< FIR 필터 >
![Page 25: Digital Signal Processing ( week 15 )](https://reader035.fdocuments.net/reader035/viewer/2022062321/5681361c550346895d9d90f1/html5/thumbnails/25.jpg)
Digital Image Processing Digital Image Processing LAB.LAB.
FIR 특성
< 필터 계수 ( 임펄스 응답의 계수 ) > < 주파수 응답 >
Frequency Content of an Image Frequency Content of an Image (3)(3)
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Digital Image Processing Digital Image Processing LAB.LAB.
영상에 필터 적용
Frequency Content of an Image Frequency Content of an Image (3)(3)
< 필터 생성 >
![Page 27: Digital Signal Processing ( week 15 )](https://reader035.fdocuments.net/reader035/viewer/2022062321/5681361c550346895d9d90f1/html5/thumbnails/27.jpg)
Digital Image Processing Digital Image Processing LAB.LAB.
영상에 필터 적용
Frequency Content of an Image Frequency Content of an Image (3)(3)
![Page 28: Digital Signal Processing ( week 15 )](https://reader035.fdocuments.net/reader035/viewer/2022062321/5681361c550346895d9d90f1/html5/thumbnails/28.jpg)
Digital Image Processing Digital Image Processing LAB.LAB.
수고 하셨습니다