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Date Submitted

Last Update

0010393

ITK

public

2010-03-09 08:03

2010-11-20 12:21

Reporter

Jef

Assigned To

Bill Lorensen

Priority

normal

Severity

major

Reproducibility

always

Status

assigned

Resolution

open

Platform

OS Version

Product Version

ITK-3-16

Target Version

Fixed in Version

Summary

0010393: itkDownsampleImageFilter is producing an output incorrect along Y-axis

Description

The filter produces an image in which the original image content is not fully included along the Y-axis. Instead the result seems stretched along that dimension, and only half is portraited (see screenshot).

The change in behavior happened somewhere between ITK 3.16 and ITK 3.8

Additional Information

Information concerning the attached screenshot

As the names of the images (visible in the bottom left corner of the images) suggest, the top left picture is the input image, top right the output image when using the 3.8 version of the DownsampleImageFilter, bottom left the output image when using the 3.16 version of the DownsampleImageFilter and bottom right the output image when using the 3.16 version of the UpsampleImageFilter.

The origin remains unchanged for all images (even with the centered coordinate system). The size and spacing of the images are, respectively:

209x155x169 2x2x2 (input)
104x77x84 4x4x4 (output_downsample_3_8)
104x77x84 4x4x4 (output_downsample_3_16)
418x310x338 1x1x1 (output_upsample_3_16)

It seems that the images have the correct size and spacing. However based on their appearance, the "image content" is incomplete in the case of the 3.16 version. Only half of the image is shown in the Y-dimension. This is not the case for the 3.8 version or for the upsampler. I am unable to say if these images are correct however.

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Attached Files

Screenshot-vv_DownsampleImageFilter [^] (203,833 bytes) 2010-03-09 08:03 [Show Content] [Hide Content]

Relationships

Notes
(0023464) Hans Johnson (developer) 2010-11-20 12:21	Bill, Would you mind investigating this bug to determine if it is still relevant? Thanks, Hans

Issue History
Date Modified	Username	Field	Change
2010-03-09 08:03	Jef	New Issue
2010-03-09 08:03	Jef	File Added: Screenshot-vv_DownsampleImageFilter
2010-11-02 14:05	Hans Johnson	Status	new => assigned
2010-11-02 14:05	Hans Johnson	Assigned To	=> Hans Johnson
2010-11-20 12:20	Hans Johnson	Assigned To	Hans Johnson => Bill Lorensen
2010-11-20 12:21	Hans Johnson	Note Added: 0023464