https://community.wolfram.com RSS Feed for Wolfram Community showing any discussions tagged with Image Processing sorted by active. https://community.wolfram.com/groups/-/m/t/3775425 ![Generating images using only horizontal lines][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=GeneratingImagesusingonlyHorizontalLines.jpg&userId=20103 [2]: https://www.wolframcloud.com/obj/d452b511-fc8a-489a-8d71-b705348d96e3 Gilmer Gary 2026-08-06T20:35:21Z https://community.wolfram.com/groups/-/m/t/3767159 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/3cc25543-4a5e-4d3f-b697-750dba8667b7 Ed Pegg 2026-07-23T20:08:21Z https://community.wolfram.com/groups/-/m/t/3763077 ![A Remote Sensing Methodology for Automatic Treeline Detection and Analysis][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=image-2026-07-17T00-19-02Z.png&userId=3760314 [2]: https://www.wolframcloud.com/obj/43409420-7b55-4d36-8573-e4dbc38fdeab Siddhi Patel 2026-07-17T00:20:54Z https://community.wolfram.com/groups/-/m/t/3753019 ![Analysing the rotational kinetic chain of a cross punch][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=newPunch.png&userId=3751686 [2]: https://www.wolframcloud.com/obj/a609a921-f3b4-4a3a-b03a-c4b3f771adb3 Nicholas Zhan 2026-07-09T21:41:31Z https://community.wolfram.com/groups/-/m/t/3755965 I'm working with someone who's trying to do something like this: ``` Rasterize[ TabularSummary@ResourceData["Sample Tabular Data: Car Models"]] ``` but she wants to be able to control how "tall" the summary is before it's rasterized. Like she can manually stretch it but then when she calls Rasterize it goes back to its normal size right. She can't like manually take a screenshot because she wants to get an agent to do this for her and it'd be hard I guess to have an agent stretch the pane for her (I don't personally know all that much about agents) but anyway do you happen to know a way to do this? Eric Parfitt 2026-07-11T01:14:54Z https://community.wolfram.com/groups/-/m/t/3748245 ![Smooth real-time 60 FPS webcam streaming using under 50 lines of Wolfram code][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=m2-res_754p.gif&userId=20103 [2]: https://www.wolframcloud.com/obj/655c28d9-1670-4b07-aa30-c04a41bdd686 Kirill Vasin 2026-07-07T19:24:41Z https://community.wolfram.com/groups/-/m/t/3728992 ![A colorful grab-bag: analytic CIE 1931 CMF approximants, Oklab and Kubelka-Munk][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=Acolorfulgrab-bag.png&userId=20103 [2]: https://www.wolframcloud.com/obj/64c340ae-1f09-49e3-87c9-397920f3ee03 J. M. 2026-06-08T02:39:59Z https://community.wolfram.com/groups/-/m/t/3728193 ![Concrete crack classification with deep learning][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=3862training.png&userId=23928 [2]: https://www.wolframcloud.com/obj/7d33f6d8-b3c7-4823-8086-347350f92adb Shenghui Yang 2026-06-06T03:53:55Z https://community.wolfram.com/groups/-/m/t/3726674 ![TSVD and autoencoder for image restoration: a comparative study][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=Untitled.png&userId=3725281 [2]: https://www.wolframcloud.com/obj/f739071a-2e30-4972-9281-a7fdea53a508 Jaekyung Seol 2026-06-03T17:59:46Z https://community.wolfram.com/groups/-/m/t/3727439 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/13c43fef-f4ac-4a80-880c-ab0a9550b068 Marco Thiel 2026-06-04T12:48:00Z https://community.wolfram.com/groups/-/m/t/3727475 [![Every river in Britain: elevation drainage networks, Horton\[Dash]Strahler statistics of the Dee & Don][1]][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=3725RivernetworksfromelevationdataHorton-StrahlerstatisticsoftheDeeandtheDon.jpg&userId=20103 [2]: https://www.wolframcloud.com/obj/d9d28359-30da-47c4-8376-717322009a9c Marco Thiel 2026-06-04T14:52:45Z https://community.wolfram.com/groups/-/m/t/3716438 ![Painting a Kerr black hole: a backward null-geodesic ray tracer with a real astrophotograph][1] *"Hook image: a viewport screenshot from inside an interactive Wolfram viewer, looking at a 360-degree black-hole panorama generated by OpenAI's gpt-image-2. This is AI art -- striking, but not derived from general relativity. The rest of the notebook builds the same scene from physics, in pure Wolfram Language. See Section 11 for the viewer itself."* &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=PaintingaKerrblackhole.jpg&userId=20103 [2]: https://www.wolframcloud.com/obj/1cc09d34-423c-4144-9e2c-c256740295ad Marco Thiel 2026-05-15T09:49:06Z https://community.wolfram.com/groups/-/m/t/3715214 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/f3cc5b88-f290-4e68-ac29-2d450c373fd1 Diego Zviovich 2026-05-12T23:08:24Z https://community.wolfram.com/groups/-/m/t/3713149 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/94bc292b-dd9a-4176-bdf8-e8edfcdffdc7 Marco Thiel 2026-05-07T20:36:56Z https://community.wolfram.com/groups/-/m/t/3713168 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/a2be2b64-94ff-4994-bd88-ffacbc0e4bb5 Marco Thiel 2026-05-08T09:06:26Z https://community.wolfram.com/groups/-/m/t/2437685 I'm very happy with the continued improvement of the Dicom import and export functionality and speed. However, there is one issue with the current implementation that makes it very unuseful if you do quantitative image analysis. It might be that I miss an option if not I think this should be fixed. In the Mathematica documentation and examples, Dicom data is typically shown and imported as images which I understand for display purposes. But I consider the information in Dicom files as data, very well curated and standardized. For many (MRI) applications, the actual quantitative values of voxels stored in Dicom actually have meaning, values, and even units. For example in the image below each voxel value is actually a quantitative measure of T2 relaxation time in the heart, where the values are stored in milliseconds as voxel values as is also mentioned in the metadata. ![enter image description here][1] ![enter image description here][2] To get from the stored values to quantitative values (WV, DV or FP) the fields from the header and the equations are well defined. Header values: - SV = stored value of DICOM PIXEL DATA without scaling - WS = RealWorldValue slope (0040,9225) "RWVSlope" - WI = RealWorldValue intercept (0040,9224) "RWVIntercept" - RS = rescale slope (0028,1053) "RescaleSlope" - RI = rescale intercept (0028,1052) "RescaleIntercept" - SS = scale slope (2005,100E) "ScaleSlope" Outputs: - WV = real world value - FP = precise value - DV = displayed value Formulas: - WV = SV * WS + WI - DV = SV * RS + RI - FP = DV / (RS * SS) So my first try was that I want to obtain the "RawData" to access the SV pixel data, which does not output anything. ![enter image description here][3] Eventually, if I import this Dicom file into Mathematica I have to use a lot of tricks to get to the correct stored values. The Dicom images I use are stored as 12-bit Integers but are converted by Mathematica to a Numerical array with type Int16. Also, I have to specifically specify that I don't want any "DataTransformation" which by default rescales the data and actually changes some voxel values!!!! In[1]:= << QMRITools` {meta, data, bd} = Import[file, {"dicom", {"MetaInformation", "Data", "BitDepth"}}, "DataTransformation" -> None]; dataT = Import[file, {"dicom", {"Data"}}]; {dd = ToExpression[ StringJoin @@ StringCases[NumericArrayType[data], DigitCharacter]], bd} {ss, rs, ri} = meta /@ {"2005_100e", "RescaleSlope", "RescaleIntercept"} {data, dataT} = Normal@{data, dataT}; svT = 2.^bd (dataT/(2.^dd)); pfT = (rs svT + ri)/(rs ss); sv = 2.^bd (data/(2.^dd)); pf = (rs sv + ri)/(rs ss); PlotData[pfT, pf] Out[3]= {16, 12} Out[4]= {1.99854, 0.500366, -2.} For my current research, I need the PF values and to get them correctly I have to: 1. Use "DataTransformation"->None, which is not really well documented what it actually does. But based on what I see actual values of the data are changed by clipping the histogram, which for default handling of medical data is never OK!! ![enter image description here][4] 2. As far as I am aware the only way to obtain the actual stored values of my Dicom data (the actual binary values stored in the file itself) I have to find the actual BiteDepth and the imported data type and rescale my data accordingly. Below are the obtained PF valued data I need with and without DataTransformation. Although the image on the right might look less appealing with default range and scaling it is actually correct when scaled apropriately. ![enter image description here][5] ![enter image description here][6] Am I missing a correct option for getting the actual data stored? If not this should definitely be changed. Dicom is the international standard to transmit, store, retrieve, print, process, and display medical imaging information. With the current implementation, it is impossible to Import and Export such files without actually changing the stored data. Thanks, Martijn [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=dcmtag.png&userId=1332602 [2]: https://community.wolfram.com//c/portal/getImageAttachment?filename=T2map.png&userId=1332602 [3]: https://community.wolfram.com//c/portal/getImageAttachment?filename=raw.png&userId=1332602 [4]: https://community.wolfram.com//c/portal/getImageAttachment?filename=hist.png&userId=1332602 [5]: https://community.wolfram.com//c/portal/getImageAttachment?filename=dataTrans1.png&userId=1332602 [6]: https://community.wolfram.com//c/portal/getImageAttachment?filename=dataTrans2.png&userId=1332602 Martijn Froeling 2022-01-05T09:42:43Z https://community.wolfram.com/groups/-/m/t/3710432 ![Computational geometry modeling of the neolithic circular ditch in Vinoř, Prague][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=ComputationalgeometrymodelingoftheneolithiccircularditchinVino%C5%99,Prague2.jpg&userId=20103 [2]: https://www.wolframcloud.com/obj/97db78e9-ef10-4f2f-8506-9a77b82eff35 Jessica Alfonsi 2026-05-01T15:59:22Z https://community.wolfram.com/groups/-/m/t/3701280 ![Exploring NASA SkyView: live imagery, dark-nebula analysis, & catalogue-driven sky-survey downloader][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=ExploringNASASkyViewliveimagery.png&userId=20103 [2]: https://www.wolframcloud.com/obj/928898a9-67eb-4590-bdf7-0113b2c76db4 Marco Thiel 2026-04-22T22:27:38Z https://community.wolfram.com/groups/-/m/t/3701601 Hello everyone, I’m working on a mathematical modeling problem: The Art of Reflection. The problem is about designing a chaotic pattern on a flat paper such that, when viewed in a vertical ideal cylindrical mirror, it reflects a clear portrait/text/pattern. Core Problem (Simplified) • Paper: flat A4 plane • Mirror: ideal vertical cylindrical surface • Given a target reflected image (in the mirror), find the original paper pattern • Also determine: cylinder radius, position, orientation My Questions : 1. How to build the coordinate transformation model between the paper plane and the cylindrical mirror reflection? 2. How to implement image unwarping/warping from the mirror image to the paper pattern in Mathematica? 3. Given a binary/logo image (like a face or text), how to compute and export the distorted paper pattern automatically? Thank you very much for your help! ZnCu LI 2026-04-23T13:44:24Z https://community.wolfram.com/groups/-/m/t/3686203 I have a bunch of microlens images, - see attached image for one -, which are pincushioned and rotated. All need -0.1 Pinch with Radius 2.0 if I use GIMP's Distorts->Whirl and Pinch.... filter and also a -2.5 degree rotation. I hoped, Mathematica's Image Processing has a built in function for this kind of lens correction, but looks like it does not have. What other modes are possible to process 1000 images in a batch? Janos Lobb 2026-04-14T02:09:12Z