![]() The Record Starts option allows plugins and macros to recreate particle outlines When it is disabled, ImageJ finds the extent by flood filling. When this option is enabled, ImageJ finds the extent of each particle To measure particles enclosed by other particles. The best fit ellipse of each measured particles.Ĭheck Display results to have the measurements for each particle displayed in the "Results" window.Ĭheck Clear Results to erase any previous measurement results.Ĭheck Summarize to display, in a separate window, the particle count, total particle area, average particle size,Ĭheck Exclude on Edges to ignore particles touching the edge of the image or selection.Ĭheck Include Holes to include interior holes.ĭisable this option to exclude interior holes and Select Masks to displayįilled outlines of the measured particles or Ellipses to display Select Outlines from the "Show:" popup menu and ImageJ will open a window containing numbered A value of 1.0 indicates a perfect circle. The formula for circularity is 4pi(area/perimeter^2). Particles with circularity values outside the range specified in theĬircularity field are also ignored. Enter a single value in Size and particles smaller than that valueĪre ignored. Use the dialog box to configure the particle analyzer. Use Image>Adjust>Threshold to threshold an image. Resumes scanning until it reaches the end of the image or selection. The wand tool, measures it using the Measure command, fills it to make it invisible, then The image or selection until it finds the edge of an object. This command counts and measures objects in binary or thresholded images. The width of the columns in the "Results" window can be adjusted by clicking on and dragging the vertical Measurements by right-clicking in the Results window and selecting The clipboard by selecting Edit>Copy All from the "Results" window menu bar. To export the measurements as a tab-delimited text file, select File>Save As>Measurementsįrom the ImageJ menu bar or File>Save As from the "Results" window menu bar. are calculated from the values of the pixels along the line. Standard deviation, mode, min, max and bounding rectangle (v1.34l or later). ![]() With line selections, the following parameters can be recorded: length, angle (straight lines only), mean, The weighting factors can be changed using Used to convert to from RGB to YUV, the color encoding The default weighting factors are the ones RGB pixels are converted toįormula V=(R+G+B)/3, or V=0.299R+0.587G+0.114B if "Weighted RGB Conversions" isĬhecked in Edit>Option>Conversions. With RGB images, results are calculated using brightness values. ![]() Use the Analyze>Set Measurements command to specify what area statistics are recorded. RecordsĬoordinates if one or more points have been defined using the point selection tool. Calculates line lengthĪnd angle if a line selection has been created using one of the three line selection tools. Has been selected using one of the first four tools in the tool bar. Alternatively, use Ctrl D ( Edit ▷ Draw ↓) to permanently draw the text on the image.Home | contents | previous | next Analyze Menuīased on the selection type, calculates and displays either area statistics, line lengths and angles,Īrea statistics are calculated if there is no selection or if a subregion of the image Use Ctrl B ( Image ▷Overlay ▷ Add Selection… ↓) to create non-destructive text annotations ( see Overlays↑ OverlayDrawStringDemo, TextOverlay macros).20: Hexadecimal Color Values↓ provides instructions on how to define semi-transparent colored backgrounds ( see also DrawTextWithBackground macro) Use Ctrl Y ( Edit ▷Selection ▷ Properties… ↓) to re-adjust font color and size, text justification and to specify a background color for the text selection.Note that menu shortcuts require holding down Ctrl while using the Text Tool ( see Using Keyboard Shortcuts↑) Use Alt to type special unit symbols such as μ ( Alt M) or Å ( Alt Shift A). Use the keyboard to add characters to the text and the backspace key to delete characters.Font style and text alignment is specified in the Fonts widget, activated by double clicking on or by running Edit ▷Options ▷ Fonts…↓ Text is drawn in foreground color ( see Color Picker… ↓).Note the following when using the Text Tool: It creates text ROIs, rectangular selections containing one or more lines of text. ![]()
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