This catches lots of people out. If you double the amplitude of a wave you give it four times as much energy, this leads on to the relationship between amplitude and intensity of a wave.
on 30 Jan 2014
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on 31 Jan 2014
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I used this command sir but its not working.. this is my input imagehttp://postimg.org/image/pe5ozahzb/e770bd0c/
I = imread([p f]);
improfile()
on 31 Jan 2014
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You're not taking the result of improfile. What variable to you want to use to accept the intensity numbers from improfile()?
on 1 Feb 2014
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I = imread([p f]);
c = improfile();
I need a plot with X and Y axis. so that the lowest intensity will be the centromere position
on 1 Feb 2014
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Well you never plotted it! You need to call plot(). Try this:
set(gcf, 'Name', 'Demo by ImageAnalyst', 'NumberTitle', 'Off')
uiwait(msgbox('Left click, then right click'));
subplot(2, 1, 2);
grid on;
on 3 Feb 2014
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on 3 Feb 2014
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Sir, Is there any way to get the intensity profile automatically. i.e., without drawing the line manually?
on 3 Feb 2014
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Yes. improfile() can take arguments that are the endpoints of the line.
on 11 Feb 2014
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Hi Image Analyst...Can you help me to find the density profile for my chromosome image..Attaching the image along with this..http://postimg.org/image/pe5ozahzb/e770bd0c/
on 11 Feb 2014
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on 20 Mar 2017
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hello image analyst. i want to know how to calculate the weight of an image?
on 20 Mar 2017
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Rasika Devi, could you confirm that you want to be able to calculate the number of photons that would be emitted to display a particular image for a particular length of time, and you would want to convert the photon energies into equivalent rest mass using E = m*c^2, in order to calculate the mass of the image? And then we should assume one standard Earth gravity in order to convert mass into weight (since weight is a force) ?
on 20 Mar 2017
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thank you sir, but in matlab there is cmd as graydiffweight() how to use this for image? can you help me?
on 20 Mar 2017
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on 20 Mar 2017
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then how can i complete the weight selection problem for the grayscale image?
on 20 Mar 2017
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It looks like you just have to pick either a representative pixel or a representative level and call graydiffweight() passing in the data and the location or level.
on 21 Mar 2017
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Thank you so much sir.. One more thing from that weight value,how do i perform the image segmentation by using any algorithm? kindly help me...
on 21 Mar 2017
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I suggest you look in the File Exchange, for Image Analyst's Image Segmentation Tutorial
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Note:
In Photoshop CS6, 3D functionality is part of Photoshop Extended. All features in Photoshop Extended are part of Photoshop CC. Photoshop CC does not have a separate Extended offering.
Note:
DICOM (an acronym for Digital Imaging and Communications in Medicine) is the most common standard for receiving medical scans. Photoshop allows you to open and work with DICOM (.dc3, .dcm, .dic, or no extension) files. DICOM files can contain multiple “slices” or frames, which represent different layers of a scan.
Photoshop reads all frames from a DICOM file and converts them to Photoshop layers. Photoshop can also place all DICOM frames in a grid on one layer, or open frames as a 3D volume which you can rotate in 3D space. Photoshop can read 8‑, 10‑, 12‑, or 16‑bit DICOM files. (Photoshop converts 10‑ and 12‑bit files to 16‑bit files.)
Once you’ve opened a DICOM file in Photoshop, you can use any Photoshop tool to adjust, mark up, or annotate the file. For example, use the Notes tool to add a comment to the file, the Pencil tool to mark a specific area of the scan or the Dust And Scratches filter to remove dust or scratches from a scan. Use the Ruler or selection tools to make measurements of image content.
Note:
Any measurement scale present in a DICOM file is automatically imported with the file. If no scale is present, the default scale of 1 pixel = 1 mm is added as a custom measurement scale. See Set the measurement scale.
You can save 8‑bit DICOM files in any file format Photoshop supports (16‑bit files must be saved as DICOM, Large Document Format, Photoshop, Photoshop PDF, Photoshop Raw, PNG, or TIFF files).
Note:
When you save a file as DICOM, any layer styles, adjustments, blend modes, or masks are discarded.
You can also view and edit metadata for DICOM files in Bridge or in the Photoshop File Info dialog box. DICOM files support external automation through scripting (see Scripting).
Before you open a DICOM file, you can specify how DICOM frames are opened (as layers, in a grid, or as a 3D volume), and set options (in the DICOM File Import dialog box) that anonymize patient metadata and display overlays. During the import you can also perform pans, zooms, and window leveling.
The DICOM import dialog box also displays DICOM header information—textual information about the file, such as its dimensions, data resolution, and whether the data has been compressed.
Note:
You can import a sequence of multiple, single-frame DICOM files into a single multilayered Photoshop file, using the New Video Layer from File command. See Import image sequences.
Choose File > Open, select a DICOMfile, and click Open.
Select the frames you want to open. Shift-click to selectcontiguous frames. To select noncontiguous frames, Ctrl-click (Windows)or Command-click (Mac OS). Click Select All toselect all frames.
Note:
To quickly scroll through frames, usethe mouse scroll wheel (Windows) or click the Right or Left Arrowbuttons below the large preview area.
Choose from the following options, and then click Open.
Import Frames As Layers places DICOM frames on layers.N‑Up Configuration displays multiple frames in a grid (enter valuesin the Rows and Columns boxes to specify height and width of grid).Import as volume opens the DICOM frames as a volume, where the z-distanceis determined by DICOM settings and data is interpolated betweenthe frames. You can view the volume from any angle, using a varietyof rendering modes to highlight data.
Anonymize overwrites patient metadata with “anonymize.” ShowOverlays displays overlays such as annotations, curves, or text.
Select Show Windowing Options to adjust the contrast (Window Width) and brightness (Window Level) of the frame. Alternatively, you can drag the Window Level tool up or down to adjust the level, or to the right or left to adjust the width. You can also choose common radiology presets from the Window Preset menu (Default, Lung, Bone, or Abdomen). Select Reverse Image to invert the brightness values of the frame.
Note:
To zoom, choose a zoom level from the Select Zoom Level menu (or click the plus and minus signs to zoom in and out). To pan, click the Hand icon at the top of the dialog box and drag across the frame.
Choose File > Open, selecta DICOM file, and click Open.
Select the frames you want to convert to a 3D volume.Shift-click to select contiguous frames. To select noncontiguousframes, Ctrl-click (Windows) or Command-click (Mac OS).Click Select All to select all frames.
In Frame Import Options, select Import as volume, thenclick Open.
Photoshop creates a 3D volume of the DICOM frames andplaces it on a 3D layer in the Layers panel. You can use Photoshop’s3D position tools to view the 3D volume from any angle, or changerender settings to better visualize data.
The original DICOM file is preserved as a Diffuse texture layer associated with the 3D volume layer. For information on 3D textures, see 3D texture editing.
Double-click the texture layer to open the DICOM file as a Smart Object in its own document window. The DICOM frames appear as separate layers in the Layers panel.
Any changes you make to individual layers are applied to the 3D volume when you close and save the Smart Object.
To save the 3D volume, you can export the 3D layer or save the file in PSD format. See Saving and exporting 3D files.
Select the 3D layer containing the DICOMvolume in the Layers panel.
Select either the 3D Position tool ora 3D camera tool inthe Tools panel.
Use the position or camera tools in the options bar to rotate, move, or scale the 3D volume. See 3D object and camera tools.
Note:
If OpenGL support is enabled on your system, you can also use the 3D Axis to rotate, move, or scale the 3D volume. See 3D Axis.
Select the 3D layer containing the DICOMvolume in the Layers panel.
From the Preset menu in the lower section of the 3D panel,select a render mode.
Note:
Render modes that use a transfer function use a Photoshopgradient to render values in the volume. The gradient color andopacity values are combined with the grayscale values in the volumeto optimize or highlight different types of content. Transfer functionrender modes are only available for grayscale DICOM images.
Lowers the opacity of homogeneous regions while retainingthe opacity of the boundaries. It can also reduce noise in the volume.
Transfer function that uses a full “rainbow” Photoshop colorgradient.
Transfer function that uses the color white for the entirevalue range, zero opacity for low range values, and high opacityfor high range values.
Transfer function that uses the color white for the entire valuerange, zero opacity for high range values, and high opacity forlow range values.
Displays maximum values in the volume to provides a quickpreview of volume structure. Does not provide any depth cues.
Transfer function that uses a full red-blue color gradient.
Transfer function that uses constant color, while opacity componentis a function with multiple spikes, to display isovalues.
Approximates X-ray radiation transport through an X-raytranslucent medium. This effect is useful for generating an imagefrom a CT scan that looks like an X-ray shot of the same object.
Transfer function using a white-black color component.
(Optional) To create a custom render mode, click Render Settings in the 3D panel to open the 3D Render Settings dialog box. Select options in the Volume Styles section of the dialog. See Change 3D render settings.
Open a DICOM file and set options in the DICOM File Import dialog box (see Open a DICOM file).
Select frames in the DICOM File Import dialog box: Shift-clickto select contiguous frames, Ctrl-click (Windows) or Command-click(Mac OS) to select noncontiguous frames, or click SelectAll to select all frames.
Enter a prefix in the Prefix box in the Export Optionsarea.
Click Export Presentation (JPEG), select a folder, andclick Select.
The JPEG files are saved in the specified locationwith the prefix added to the filenames. If you selected multipleframes, Photoshop appends successive numbering to the end of eachfilename (for example, DICOM Frame1, DICOM Frame2, DICOM Frame3).
Youcan view and edit several categories of DICOM metadata in the Photoshop FileInfo dialog box.
Patient data
Includes patient name, ID, sex, and date of birth.
Study data
Includes study ID, referring physician, study date and time,and study description.
Series data
Includes series number, modality, series date and time, andseries description.
Equipment data
Includes the equipment institution and manufacturer.
Image data
Includes the transfer syntax, photometric interpretation,image width and height, bits per pixel, and frames. (These fieldsare not editable.)
To animate DICOM slices or frames, select all DICOM layers and choose Make Frames From Layers from the Animation (Timeline) panel menu.
After creating frames in the (Animation) Timeline panel, you can save DICOM files as QuickTime movies (change grayscale DICOM files to RGB, and then render to video). You can also save frames as animated GIF files (choose File > Save for Web and Devices).
You can also use the Timeline panel to animate a 3D volume created from a DICOM file. See Creating 3D objects and animations.
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