Re: Problems reading JPG files

Posted by ctrueden on Aug 29, 2016; 7:50pm
URL: http://imagej.273.s1.nabble.com/Problems-reading-JPG-files-tp5017133p5017134.html

Hi Paul,

Do you have the SCIFIO option checked in Edit > Options > ImageJ2...?
SCIFIO never opens multichannel images as RGB.

http://imagej.net/SCIFIO

Regards,
Curtis

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Curtis Rueden
LOCI software architect - http://loci.wisc.edu/software
ImageJ2 lead, Fiji maintainer - http://imagej.net/User:Rueden
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On Mon, Aug 29, 2016 at 2:38 PM, Stutzman, Paul E. (Fed) <
[hidden email]> wrote:

> Something appears to have changed in the way ImageJ (v 1.50i) is
> interpreting 8-bit .JPG files that I have been successfully processing in
> the past. Previously these files would be displayed and processed as 8-bit,
> single plane images but now with images from my same SEM imaging system
> (which has not been updated), I get what appears to be a three-plane RGB
> image, even though the image type is identified as 8-bit via Image->Type.
> The white strip at the image top notes 1/3  and the bottom strip has a
> scoll slider as the RGB images do and the colors show in the B&C window as
> I slide the scroll bar.  If I attempt to adjust the brightness/contrast I
> get whatever color it is set to using the slider and adjusting
> brightness/contrast is difficult, if not impossible to retain a gray color
> scheme.  Attempts to do RGB color merges of X-ray images is similarly
> useless now.  Can anyone explain the change and how I might be able to read
> these as 8-bit, single plane images and eliminate the RGB interpretation?
> I am not seeing any thing under Options.
>
> Show Info appears to confirm this, and GIMP identifies it as RGB color, 1
> layer
>
> SCIFIO version: 0.27.1
> File format: JPEG
> --- Dataset Information ---
> BitsPerPixel = 8
> PixelType = 1
> Dataset name = /Users/stutz/Documents/Project
> s/Dale/June_7d_10_23_C_Pastes/MA3-174_LS_10C/LS10_S.jpg
> Image 0 Information
> Dimension order = X,Y,Channel
> Dimension lengths = 512,384,3
> --- Global Metadata ---
> --- Image Metadata ---
>
> ------------------------------------------------------
> ImageJ 2.0.0-rc-29-SNAPSHOT/1.50i; Java 1.6.0_65 [64-bit]; Mac OS X
> 10.9.5; 157MB of 12263MB (1%)
>
> Title: LS10_S.jpg
> Width:  512 pixels
> Height:  384 pixels
> Depth:  1 pixels
> Size:  576K
> Voxel size: 1x1x1 pixel^3
> ID: -96
> Bits per pixel: 8 (color LUT)
> Display ranges
>  1: 0-255
>  2: 0-255
>  3: 0-255
> Image: 1/3
>  Channels: 3
>  Composite mode: "composite"
> No threshold
> Uncalibrated
> Path: /Users/stutz/Documents/Projects/Dale/June_7d_10_23_C_Pastes/
> MA3-174_LS_10C/LS10_S.jpg
> Screen location: 84,172 (2560x1440)
> SetMenuBarCount: 157
> Coordinate origin:  0,0,0
> No overlay
> No selection
>
>
>
>
> Paul
>
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> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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