원문정보
초록
영어
Wavelet transformation in image compression is to offer higher image compressibility and high-quality by quantization and entropy encoding. More image quality is good that reconstructed image by wavelet calculation than acquire cosine transform. Therefore, wavelet itself is function if it is wavelet's feature, in this function, do processing applying difference scale and resolution. That is, this is not that fixed resolution has been decided like existent compression way, when it regulated scale, damage goes in pixel and picture looks like break without giving damage entirely in reflex even if magnify or curtail Decoding. Therefore, this paper is in Image that using new wavelet application compression way research that see applies comparing In each image noted this time compressing step by step with circle image compression efficiency recognize. Also, estimated quality pass through by printing of compressed image, investigated compression ratio of most suitable that get print of high quality and elevation of transmission speed.
목차
1. 서론
2. 이론
2-1. 웨이블릿의 원리
2-2. 웨이블릿을 이용한 영상의 분해 및 합성
2-3. 기본 알고리즘
3. 실험
3-1. 압축과 샘플이미지의 제작과 변환
3-2. 실험 방법
4. 결과 및 고찰
4-1. CIE Lab 표색계를 이용한 색차 평가
4-2. 히스토그램을 이용한 그레이 이미지의 평가
4-3. PSNR에 의한 평가
4-4. 이미지의 충실도에 의한 평가
4-5. 압축률에 따른 이미지의 용량 평가
4-6. 차연산(Difference Operation)에 의한 시각적 평가
4-7. 인쇄물의 주관적인 평가
5. 결론
참고문헌
