Editing Image package

The {{Forge|image|image package}} is part of the Octave Forge project. See its {{Forge|image|homepage}} for the latest release.

<div class="tocinline">__TOC__</div>

== Development ==

Follows an incomplete list of stuff missing in the image package to be matlab compatible. Bugs are not listed here, [https://savannah.gnu.org/bugs/?func=search&group=octave search] and [https://savannah.gnu.org/bugs/?func=additem&group=octave report] them on the bug tracker instead.

=== Roadmap ===

The following are missing targets for the next minor release of the image package (version 2.8.0).  Small bug fixes, build fixes, and regressions may still be released before in a patch release (Version 2.6.X).

* add ellipse properties to {{codeline|regionprops}} (see bug {{bug|44100}})  ([http://hg.code.sf.net/p/octave/image/rev/7cf22a478792 done])
* speed up {{codeline|regionprops}} for large images with many small objects (probably work around for loop with labeled == labelid)
* support passing {{codeline|bwconncomp}} output to {{codeline|regionprops}} (and then fix {{codeline|bwpropfilt}} to use that instead of a labeled image)
* ND support on {{codeline|imfilter}}
* check if {{codeline|normxcorr2}} is Matlab compatible and investigate making use of {{codeline|fftconvn}} since it's likely to receive large input
* investigate implementing the missing deconvolution functions (see patch {{patch|8571}})
* anything else that is done or submitted before the above are done

=== Missing functions ===
{{Note|this entire section is about the current development version. If a Matlab function is missing from the list and does not appear on the current release of the package, confirm that is also missing in the [https://sourceforge.net/p/octave/image/ development sources] before adding it.}}

<div style="column-count:4;-moz-column-count:4;-webkit-column-count:4">
* activecontour
* adapthisteq
* applycform
* bwconvhull
* bwdistgeodesic
* bwlookup
* bwtraceboundary
* bwulterode
* chromadapt
* colorcloud
* convmtx2
* corner
* cornermetric
* cpcorr
* cpselect
* cpstruct2pairs
* dct2
* dctmtx
* deconvblind
* deconvlucy
* deconvreg
* decorrstretch
* [https://savannah.gnu.org/patch/?9593 demosaic]
* dicomanon
* dicomdisp
* dicomuid
* dpxinfo
* dpxread
* fan2para
* fanbeam
* fliptform
* freqz2
* fsamp2
* ftrans2
* fwind1
* fwind2
* gabor
* getimage
* getimagemodel
* getline
* getpts
* getrect
* gradientweight
* grayconnected
* graycoprops
* graydiffweight
* hdrread
* hdrwrite
* iccfind
* iccread
* iccroot
* iccwrite
* idct2
* ifanbeam
* illumgray
* illumpca
* illumwhite
* im2java2d
* ImageAdapter
* imageinfo
* imapprox
* imbinarize
* imboxfilt
* imboxfilt3
* imcolormaptool
* imcontour
* imcontrast
* imdisplayrange
* imdistline
* imellipse
* imfreehand
* imgaborfilt
* imgaussfilt
* imgaussfilt3
* imgca
* imgcf
* imguidedfilter
* imhandles
* imhistmatch
* imline
* immagbox
* immovie
* imoverview
* imoverviewpanel
* [https://savannah.gnu.org/patch/?8722 impixelinfo]
* [https://savannah.gnu.org/patch/?8722 impixelinfoval]
* impixelregion
* impixelregionpanel
* implay
* impoint
* impoly
* improfile
* imrect
* imreducehaze
* imregconfig
* imregcorr
* imregdemons
* imregister
* imregtform
* imroi
* imscrollpanel
* imsegfmm
* imseggeodesic
* imtool
* imwarp
* integralBoxFilter
* integralBoxFilter3
* interfileinfo
* interfileread
* iptaddcallback
* iptcheckhandle
* iptgetapi
* iptGetPointerBehavior
* iptgetpref
* ipticondir
* iptPointerManager
* iptprefs
* iptremovecallback
* iptSetPointerBehavior
* iptsetpref
* iptwindowalign
* isicc
* isrset
* [https://savannah.gnu.org/patch/?9600 lin2rgb]
* makecform
* makeConstrainToRectFcn
* makehdr
* makeresampler
* [https://savannah.gnu.org/patch/?9602 multithresh]
* nitfinfo
* nitfread
* openrset
* para2fan
* projective2d
* regionfill
* rgb2lin
* roifill
* roifilt2
* [https://savannah.gnu.org/patch/?9509 roipoly]
* rsetwrite
* ssim
* tformarray
* tonemap
* truesize
* visboundaries
* warp
* [https://savannah.gnu.org/patch/?8060 whitepoint]
* [https://savannah.gnu.org/patch/?9603 xyz2double]
* [https://savannah.gnu.org/patch/?9603 xyz2uint16]
</div>

=== Different functions ===

* with version 2014a, Matlab introduced a new function imtranslate. This function was part of Octave's package since 2002 but Matlab version is completely different. It needs to be rewritten for Matlab compatibility.

=== Missing options ===

* @strel
** missing SE decomposition for the diamond shape
** approximation argument for the ball and disk shapes are not implemented
** the translate method is not yet implemented
* blockproc
** The name-value input arguments have not yet been implemented.
* colfilt
** the option to split the image in smaller blocks before performing the im2col and filtering is ignored. Since that option only allows to use less memory and has no effect on the output is only important for sliding filtering with big blocks size.
* impixel
** interactive selection of points (less than 2 input arguments) is not yet implemented. Ability to create such UIs needs to be implemented in Octave core first.
* imcrop
** messing around with alternative coordinate systems (XData and YData) are not yet implemented.
* imwrap
** no supports for SmoothEdges option
* hough
** no RhoResolution option

=== Contributing ===
* It'd help to group the missing functions above, as per [http://www.mathworks.com/help/images/functionlist.html] (similar to what was done in the [[signal package]] wiki page); please keep the original alphabetical list intact.

=== Open Bugs ===

{| class="wikitable" 
|-
! bug !! bug title !! status
|-
| {{bug|38087}}|| image package: graycomatrix incompatibilities with matlab  || None
|-
| {{bug|43218}}|| image package: imshear causes more signal spread than expected and inconsistent vertical offset || None
|-
| {{bug|44396}}|| image package: bwmorph shrink does not preserve Euler number || Confirmed
|-
| {{bug|44831}}|| image package: imrotate - different dimensions of output matrix || Confirmed
|-
| {{bug|45088}}|| image package: rangefilt requires domain and image to have equal number of dimensions || In Progress
|-
| {{bug|48529}}|| image package: compilation warnings under Mac OSX|| None
|-
| {{bug|49452}}|| [Octave forge] (image) missing MATLAB function corner and undistortImage|| Confirmed
|-
| {{bug|50151}}|| image package: normxcorr2 is not compatible with Matlab|| None
|-
| {{bug|50188}}|| image package: poly2mask does incompatible rounding|| None
|-
| {{bug|50257}}|| image package: imtranslate is not Matlab compatible|| Confirmed
|-
| {{bug|50341}}|| Missing Function imrect in image package|| None
|-
| {{bug|50429}}|| image package: xyz2lab changed slightly in Matlab (and other color conversion functions)|| None 
|-
| {{bug|50554}}|| [octave forge] (image) cp2tform missing 'piecewise linear' and 'lwm' support|| None 
|-
| {{bug|50656}}|| image package: bwerode does not return right size when there's more dimensions on conn || None
|-
| {{bug|50708}}|| image package: add demosaic.m || Patch Submitted
|-
| {{bug|50732}} || Image package: infinite error loop when assigning a strel (class) object to a vector|| Confirmed
|-
| {{bug|51420}} || [octave forge] (image) imrotate is less tolerant to missing argument than Matlab || None
|-
| {{bug|51719}} || [octave forge] (image) watershed unit test failure || None
|-
| {{bug|51884}} || [octave forge] (image) bwmorph(blackNwhiteMatrix, "thicken", 1) returns negated result (+ strange behavior at border) || None
|-
| {{bug|51979}} || [octave forge] (image) Failing unit test for impyramid || None
|-
| {{bug|51980}} || [octave forge] (image) Failing unit test for edge|| None
|-
| {{bug|52006}} || [octave forge] (image) 'makecform' feature request || Confirmed
|-
| {{bug|52119}} || [octave forge] (image) Add 'reflect' padding option to imfilter || None
|-
| {{bug|52715}} || [octave forge] (image) Add full data range option to ycbcrfunc conversions || None
|-
| {{bug|52959}} || [octave forge] (image) histeq is not compatible with Matlab || None
|-
| {{bug|55059}} || [octave forge] (image) Failing unit test for grayslice || In Progress
|-
| {{bug|55438}} ||  [octave forge] (image) Binary input image for edge || None
|- 
| {{bug|55521}} || [octave forge] (image) Unit tests for bwpack and bwunpack fail on big endian architectures|| None
|-
| {{bug|56958}} || [Octave-Forge] (image) Implementation of insertText  || Confirmed
|-
| {{bug|57822}} || [octave forge] (image) test failures on macOS - imadjust, immse, mean2 || In progress
|-
| {{bug|58684}} || [octave forge] (image) imtranslate produces nonsense for fractional shifts || Confirmed
|-
| {{bug|59773}} || [octave forge] (image) iradon is not Matlab compatible when using filter || None
|-
| {{bug|62099}} || [octave forge] (image) imresize - lanczos* is not implemented || None
|-
| {{bug|62452}} || [octave forge] (image) bwmorph spur produces wrong result || None
|-
|}

=== Patches ===

* {{patch|8059}}: [new function for image package] ranktf.m
* {{patch|8060}}: [image package new function] whitepoint.m
* {{patch|8722}}: implement impixelinfo and impixelinfoval
* {{patch|8813}}: image package: Extended image I/O for Analyze 7.5 format to handle big-endian images
* {{patch|8571}}: image package: three deconvolution routines (Wiener, RL, RLTV)
* {{patch|9509}}: Image package: simple implementation of roipoly function
* {{patch|9593}}: [Octave Forge] (Image) New function demosaic.m from bug #50708
* {{patch|9600}}: [Octave Forge] (Image) New functions: lin2rgb.m and lrgb2lin.m
* {{patch|9602}}: [octave forge] (image) multithresh
* {{patch|9603}}: [Octave Forge] (Image) New functions: xyz2double.m, xyz2single.m, xyz2uint16.m
* {{patch|9729}}: [octave forge] (image) -- rgb2xyz conversion with adapted whitepoint
* {{patch|9853}}: [octave forge] (image) implement niftiread, niftiwrite, niftiinfo
* {{patch|9957}}: Nonlinear filter for image package (colfilt2)

== Image Processing Functions ==

{{Note| This section is still under construction so the list is incomplete.}}

This is a list of Image Processing functions by topic including: missing functions, related bugs and patches, and some alternatives.

Note:  

=== Basic Read and Write Image Files ===

{| class="wikitable" style="text-align: center"
|-
! Function !! Octave Package Version !! Related Bugs and Patches !! Alternatives !! Notes
|- 
| imfinfo || function is in Octave core || || ||
|- 
| imread|| function is in Octave core || || [http://kyamagu.github.io/mexopencv/matlab/imread.html cv.imread] from [https://github.com/kyamagu/mexopencv mexopencv] || 
in case of color image, the color order of Octave is RGB/RGBA while OpenCV color order is BGR/BGRA
|- 
| imwrite|| function is in Octave core || || [http://kyamagu.github.io/mexopencv/matlab/imread.html cv.imwrite] from [https://github.com/kyamagu/mexopencv mexopencv] ||
in case of color image, the color order of Octave is RGB/RGBA while OpenCV color order is BGR/BGRA
|-
|}

'''Missing:''' ''dicomanon, dicomdisp, dicomuid, dpxinfo, dpxread, interfileinfo, interfileread, nitfinfo, nitfread
''

=== High Dynamic Range Images - ''Not implemented'' ===

=== Large Image Files - ''Not implemented'' ===

=== Type Conversion  ===

{| class="wikitable" style="text-align: center"
|-
! Function !! Octave Package Version !! Related Bugs and Patches !! Alternatives || Notes
|- 
| adaptthresh || - || ||  [http://kyamagu.github.io/mexopencv/matlab/adaptiveThreshold.html cv.adaptiveThreshold] from [https://github.com/kyamagu/mexopencv mexopencv]|| 
|-
| demosaic || - || {{bug|50708}} {{patch|9593}}|| [http://kyamagu.github.io/mexopencv/matlab/demosaicing.html cv.demosaicing] from [https://github.com/kyamagu/mexopencv mexopencv] ||
|- 
| gray2ind || function is in Octave core || || ||
|-
| grayslice || < 1.0.0 || ||  ||
|-
| graythresh || 1.0.0 || || || Octave version has more methods
|-
| im2double || 1.0.0 || || ||
|-
| im2int16  || 2.0.0 || || ||
|-
| im2java2d ||   -    || || ||
|-
| im2single || 2.0.0 || || ||	
|-
| im2uint16 || 1.0.0 || || || 	
|-
| im2uint8  || 1.0.0 || || ||	
|-
| imbinarize || - || || imbinarize (I) is equivalent to im2bw(I, graythresh(I)), 
another option is [http://kyamagu.github.io/mexopencv/matlab/threshold.html cv.threshold]  from [https://github.com/kyamagu/mexopencv mexopencv] 
||
|-
| imcast     || 2.4.0 || || || Octave Only
|-
| imquantize || 2.6.0 || ||  ||
|-
| ind2gray  ||  function is in Octave core || ||	 ||
|-
| ind2rgb   || function is in Octave core || ||	 ||
|-
| label2rgb || 1.0.0 || ||	 ||
|-
| mat2gray || < 1.0.0 || ||	 ||
|-
| multithresh || - || {{patch|9602}} || ||
|-
| otsuthresh || 2.10.0 ||   || || 
|-
| rgb2gray || function is in Octave core  || {{bug|53654}} || || Octave version 4.4.0 and above
|-
| rgb2ind  || function is in Octave core  || || ||
|-
|}

=== Color ===

{| class="wikitable" style="text-align: center"
|-
! Function !! Octave Package Version !! Related Bugs and Patches !! Alternatives || Notes
|-
| colorangle || 2.10.0 || || || 
|-
| lab2double || 2.6.0 || || || 
|-
| lab2rgb || 2.6.0 || || || 
|-
| lab2uint16 ||  2.6.0  || || || 
|-
| lab2uint8 ||  2.6.0  || || || 
|-
| lab2xyz ||  2.6.0  || || || 
|-
| lin2rgb || - || {{patch|9600}} || ||
|-
| ntsc2rgb || 2.8.0 || || || 
|-
| rgb2lab ||  2.6.0  || || || 
|-
| rgb2lin || - || {{patch|9600}} || ||
|-
| rgb2ntsc || 2.8.0 || || || 
|-
| rgb2xyz ||  2.6.0  || || || 
|-
| rgb2ycbcr ||  < 1.0.0|| || || 
|-
| whitepoint || - || {{patch|8060}} || ||
|-
| xyz2double || - || {{patch|9603}} || ||
|-
| xyz2lab ||  2.6.0  || || || 
|-
| xyz2rgb ||  2.6.0  || || || 
|-
| xyz2uint16 || - || {{patch|9603}} || ||
|-
| ycbcr2rgb ||  2.2.0|| || || 
|-
|}

'''Missing:''' ''applycform, chromadapt, colorcloud, iccfind, iccread, iccroot, iccwrite, illumgray, illumpca, illumwhite, imapprox, isicc, makecform''

=== Synthetic Images ===

{| class="wikitable" style="text-align: center"
|-
! Function !! Octave Package Version !! Related Bugs and Patches !! Alternatives || Notes
|- 
| checkerboard ||  2.2.0 || || ||
|-
| imnoise ||  2.2.2  || || ||
|-
| phantom ||  2.6.2  || || ||
|-
|}

=== Basic Display ===

{| class="wikitable" style="text-align: center"
|-
! Function !! Octave Package Version !! Related Bugs and Patches !! Alternatives || Notes
|- 
| imshow || function is in Octave core || || ||
|-
| montage || 2.2.0 || || ||
|-
| imfuse || 2.14.0 || || ||
|-
| imshowpair || 2.14.0 || || ||
|-
|}

'''Missing:''' '' immovie, implay, iptgetpref, iptprefs, iptsetpref, warp''

=== Geometric Transformations ===

{| class="wikitable" style="text-align: center"
|-
! Function !! Octave Package Version !! Related Bugs and Patches !! Alternatives || Notes
|- 
| affine2d || 2.14.0 || || ||
|-
| affine3d || 2.14.0 || || ||
|-
| cp2tform || 2.2.0 || || ||
|-
| imcrop || 2.0.0 || || ||
|-
| impyramid || 2.6.0 || || ||
|-
| imref2d || 2.12.0 || || ||
|-
| imref3d || 2.12.0 || || ||
|-
| imrotate || <1.0.0 || || ||
|-
| imtranslate || <1.0.0 || || || incompatible to Matlab's imtranslate
|-
| maketform || 2.2.0 || || ||
|-
| tformfwd || 2.2.0 || || ||
|-
| tforminv || 2.2.0 || || ||
|-

|}

'''Missing:''' '' imwarp''

=== Image Filtering === 

{| class="wikitable" style="text-align: center"
|-
! Function !! Octave Package Version !! Related Bugs and Patches !! Alternatives || Notes
|- 
| bwareafilt|| 2.4.0  || ||	 ||
|-
| bwpropfilt || 2.4.0  || ||	 ||
|-
| convmtx2 || -  || ||	 ||
|-
| entropyfilt	||  1.0.9  ||  ||	 ||
|-
| fibermetric	||-  || ||	 ||
|-
| freqz2 ||  -|| ||	 ||
|-
| fsamp2 || - || ||	 ||
|-
| fspecial || 1.0.0  || ||	 ||
|-
| ftrans2 ||  - || ||	 ||
|-
| fwind1 || - || ||	 ||
|-
| fwind2 || - || ||	 ||
|-
| gabor	|| - || ||	 ||
|- 
| imboxfilt	|| - || ||	 ||
|-
| imboxfilt3	|| - || ||	 ||
|-
| imfilter || 1.0.5  || ||	 ||	
|- 
| imgaborfilt	|| -  || ||	 ||
|-
| imgaussfilt	|| -  || ||	 ||
|-
| imgaussfilt3	||  - || ||	 ||
|-
| imguidedfilter ||  - || ||	 ||
|-
| imsmooth|| 1.0.5 || ||	 || Octave only
|-
| integralBoxFilter	||  - || || ||
|-	
| integralBoxFilter3	||- || || ||
|-	
| integralImage	|| 2.12.0 ||  ||  ||
|-	
| integralImage3	||  2.12.0   || || ||
|-	
| medfilt2	|| < 1.0.0   || || ||
|-	
| medfilt3 || - || || ||
|-	
| nlfilter	|| < 1.0.0 || || ||
|-	
| normxcorr2	|| 2.0.0 ||  {{bug|50151}} || ||
|-	
| ordfilt2	|| 1.0.9 ||  || ||
|-	
| padarray	|| < 1.0.0 || || ||
|-	
| rangefilt	|| 1.0.9 || {{bug|45088}} || ||
|-	
| stdfilt	||  1.0.9 ||  || ||
|-	
| wiener2 ||  2.8.0|| ||	 ||	
|-
|}

=== Image Arithmetic === 

{| class="wikitable" style="text-align: center"
|-
! Function !! Octave Package Version !! Related Bugs and Patches !! Alternatives || Notes
|- 	
| imabsdiff	 || 2.0.0   || || ||
|- 	
| imadd	         || 2.0.0   || || ||
|- 	
| imapplymatrix	 || 2.14.0  || || ||
|- 	
| imcomplement	 || 1.0.6   || || ||
|- 	
| imdivide	 || 2.0.0   || || ||
|- 	
| imlincomb	 || 2.0.0   || || ||
|- 	
|  immultiply	 || 2.0.0   || || ||
|-
| imsubtract     || 2.0.0   || || ||
|-
|}

=== Morphological Operations === 

{| class="wikitable" style="text-align: center"
|-
! Function !! Octave Package Version !! Related Bugs and Patches !! Alternatives || Notes
|- 
| applylut  ||   < 1.0.0     || || ||
|- 			
| bwareaopen	 ||  2.2.0      || || ||
|- 	
|   bwhitmiss ||  < 1.0.0      || || ||
|- 	
|  bwlookup ||     --   || || ||
|-
|  bwmorph	 || < 1.0.0        ||  {{bug|51884}} || ||
|- 	
|  bwpack	||   2.10.0     || || ||
|- 	
|  bwunpack	||   2.10.0     || || ||
|- 	
|  bwulterode	||   --     || || ||
|- 	
| conndef  ||    < 1.0.0     || || ||
|- 	
|  imbothat ||   2.0.0     || || ||
|- 	
| imclearborder	 ||  2.4.0      || || ||
|- 	
| imclose	 ||  < 1.0.0      || || ||
|- 	
|  imdilate	||   < 1.0.0     || || ||
|- 	
|  imerode	||  < 1.0.0      || || ||
|- 	
| imextendedmax	 ||    2.8.0 ||  || ||
|- 	
|  imextendedmin ||    2.8.0 ||  || ||
|- 	
| imfill	 ||  2.6.0      || || ||
|- 	
| imhmax	 ||     2.8.0 ||  || ||
|- 	
| imhmin	 ||     2.8.0 ||   || ||
|- 	
|  imimposemin	||     2.8.0 ||  || ||
|- 	
|  imopen	||  < 1.0.0      || || ||
|- 	
| imreconstruct	 ||  2.4.0      || || ||
|- 	
| imregionalmax	 ||  2.4.0      || || ||
|- 	
| imregionalmin	 ||   2.4.0     || || ||
|- 	
| imtophat	 ||   < 1.0.0     || || ||
|- 	
| iptcheckconn	 ||  2.0.0      || || ||
|- 	
| offsetstrel ||     --   || || ||
|- 	
| strel	 ||    2.2.0    || {{bug|50732}} || ||
|- 	
| watershed	 ||   2.6.0     || || ||
|-
|}

=== Image Transforms ===

{| class="wikitable" style="text-align: center"
|-
! Function !! Octave Package Version !! Related Bugs and Patches !! Alternatives || Notes
|-
| dct2 ||  - || || ||
|-
| dctmtx || -  || || ||
|-
| fanbeam || -  || || ||
|-
| fan2para ||  - || || ||
|-
| fftshift|| part of core Octave  || || ||
|-
| fft2   || part of core Octave  || || ||
|-
| hough	 || 2.8.0  || || ||
|-
| houghlines	 || 2.10.0  || || ||
|-
| houghpeaks	 || 2.10.0  || || ||
|-
|idct2	||  - || || ||
|-
|ifftshift|| part of core Octave  || || ||
|-
|ifft2|| part of core Octave  || || ||
|-
|iradon|| <1.0.0  || || ||
|-	
|para2fan|| - || || ||
|-
|radon|| <1.0.0  || || ||
|-
|}

=== Graphical Interface Interaction === 

{| class="wikitable" style="text-align: center"
|-
! Function !! Octave Package Version !! Related Bugs and Patches !! Alternatives || Notes
|-
| imellipse ||  -  || || ||
|- 
| imfreehand ||  -  || || ||
|-
| imline ||  -  || || ||
|-
| immagbox ||  -  || || ||
|-
| imoverview ||  -  || || ||
|-
| imoverviewpanel ||  -  || || ||
|-
| impixelinfo ||  -  || {{patch|8722}} || ||
|-
| impixelinfoval ||  -  || {{patch|8722}} || ||
|-
| impixelregion ||  -  || || ||
|-
| impixelregionpanel ||  -  || || ||
|-
| implay ||  -  || || ||
|-
| impoint ||  -  || || ||
|-
| impoly ||  -  || || ||
|-
| imrect ||  -  || || ||
|-
| imscrollpanel ||  -  || || ||
|-
| iptgetpref ||  -  || || ||
|-
| iptprefs ||  -  || || ||
|-
| iptsetpref ||  -  || || ||
|-
|}
* Obs: implay, iptgetpref, iptprefs, iptsetpref functions are on Basic Display section too...

[[Category:Octave Forge]]
[[Category:Missing functions]]