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The impact of image information on compressibility and degradation in medical image compression
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10.1118/1.2218316
/content/aapm/journal/medphys/33/8/10.1118/1.2218316
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/33/8/10.1118/1.2218316

Figures

Image of FIG. 1.
FIG. 1.

ROI and test patterns used for quantitative and qualitative evaluation of image degradation. (a) An original axial CT image with frame, indicating ROI that was subsequently inserted in the upper left corner of all original images. (b) Magnified ROI. (c) The high contrast test pattern consisted of three zones with different spatial frequencies, with alternating bars of one, two, and three pixels width and with 100% modulation of intensities, alternating between the highest and the lowest gray-scale values. (d) The low contrast test pattern consisted of two pixels wide bars, with the intensity modulations of 1%, 3%, and 5%.

Image of FIG. 2.
FIG. 2.

Image entropy of axial CT images (right). A midsagittal image (left) indicates the positions of the corresponding axial CT images.

Image of FIG. 3.
FIG. 3.

File size, local, and global MSE for axial CT images compressed by JPEG QF (right). A midsagittal image (left) indicates the positions of the corresponding axial CT images.

Image of FIG. 4.
FIG. 4.

File size, local, and global MSE of axial CT images compressed by JPEG 2000 QF (right). A midsagittal image (left) indicates the positions of the corresponding axial CT images.

Image of FIG. 5.
FIG. 5.

File size, local, and global MSE of axial CT images compressed by JPEG 2000 CR (right). A midsagittal image (left) indicates the positions of the corresponding axial CT images.

Image of FIG. 6.
FIG. 6.

The example of image distortion in the low contrast test pattern in the images compressed by JPEG 2000 CR (1:16). (a) Original test pattern (1% modulation—top, 3% modulation—middle, 5% modulation—bottom). (b) Test pattern compressed with no visual loss (score 0). (c) Test pattern compressed with partial visual loss in 1% modulation, but no loss in 3% modulation (score 1). (d) Test pattern compressed with complete visual loss in 1% modulation and partial visual loss in 3% modulation, but no loss in 5% modulation (score 2).

Image of FIG. 7.
FIG. 7.

Visual distortions of the low contrast test patterns in the axial CT images compressed by JPEG 2000 CR (1:16). A midsagittal image indicates the position of axial CT image. Score 0—no visual loss, score 1—visual loss in 1% modulation, and score 2—visual loss in 3% modulation.

Tables

Generic image for table
TABLE I.

Scheme for qualitative visual evaluation of high and low contrast test pattern.

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/content/aapm/journal/medphys/33/8/10.1118/1.2218316
2006-07-21
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The impact of image information on compressibility and degradation in medical image compression
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/33/8/10.1118/1.2218316
10.1118/1.2218316
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