export_fig
==========
A toolbox for exporting figures from MATLAB to standard image and document formats nicely.
### Overview
Exporting a figure from MATLAB the way you want it (hopefully the way it looks on screen), can be a real headache for the unitiated, thanks to all the settings that are required, and also due to some eccentricities (a.k.a. features and bugs) of functions such as `print`. The first goal of export_fig is to make transferring a plot from screen to document, just the way you expect (again, assuming that's as it appears on screen), a doddle.
The second goal is to make the output media suitable for publication, allowing you to publish your results in the full glory that you originally intended. This includes embedding fonts, setting image compression levels (including lossless), anti-aliasing, cropping, setting the colourspace, alpha-blending and getting the right resolution.
Perhaps the best way to demonstrate what export_fig can do is with some examples.
### Examples
**Visual accuracy** - MATLAB's exporting functions, namely `saveas` and `print`, change many visual properties of a figure, such as size, axes limits and ticks, and background colour, in unexpected and unintended ways. Export_fig aims to faithfully reproduce the figure as it appears on screen. For example:
```Matlab
plot(cos(linspace(0, 7, 1000)));
set(gcf, 'Position', [100 100 150 150]);
saveas(gcf, 'test.png');
export_fig test2.png
```
generates the following:
| Figure: | test.png: | test2.png: |
|:-------:|:---------:|:----------:|
|![](https://farm6.staticflickr.com/5616/15589249291_16e485c29a_o_d.png)|![](https://farm4.staticflickr.com/3944/15406302850_4d2e1c7afa_o_d.png)|![](https://farm6.staticflickr.com/5607/15568225476_8ce9bd5f6b_o_d.png)|
Note that the size and background colour of test2.png (the output of export_fig) are the same as those of the on screen figure, in contrast to test.png. Of course, if you want the figure background to be white (or any other colour) in the exported file then you can set this prior to exporting using:
```Matlab
set(gcf, 'Color', 'w');
```
Notice also that export_fig crops and anti-aliases (smooths, for bitmaps only) the output by default. However, these options can be disabled; see the Tips section below for details.
**Resolution** - by default, export_fig exports bitmaps at screen resolution. However, you may wish to save them at a different resolution. You can do this using either of two options: `-m<val>`, where <val> is a positive real number, magnifies the figure by the factor <val> for export, e.g. `-m2` produces an image double the size (in pixels) of the on screen figure; `-r<val>`, again where <val> is a positive real number, specifies the output bitmap to have <val> pixels per inch, the dimensions of the figure (in inches) being those of the on screen figure. For example, using:
```Matlab
export_fig test.png -m2.5
```
on the figure from the example above generates:
![](https://farm4.staticflickr.com/3937/15591910915_dc7040c477_o_d.png)
Sometimes you might have a figure with an image in. For example:
```Matlab
imshow(imread('cameraman.tif'))
hold on
plot(0:255, sin(linspace(0, 10, 256))*127+128);
set(gcf, 'Position', [100 100 150 150]);
```
generates this figure:
![](https://farm4.staticflickr.com/3942/15589249581_ff87a56a3f_o_d.png)
Here the image is displayed in the figure at resolution lower than its native resolution. However, you might want to export the figure at a resolution such that the image is output at its native (i.e. original) size (in pixels). Ordinarily this would require some non-trivial computation to work out what that resolution should be, but export_fig has an option to do this for you. Using:
```Matlab
export_fig test.png -native
```
produces:
![](https://farm6.staticflickr.com/5604/15589249591_da2b2652e4_o_d.png)
with the image being the size (in pixels) of the original image. Note that if you want an image to be a particular size, in pixels, in the output (other than its original size) then you can resize it to this size and use the `-native` option to achieve this.
All resolution options (`-m<val>`, `-q<val>` and `-native`) correctly set the resolution information in PNG and TIFF files, as if the image were the dimensions of the on screen figure.
**Shrinking dots & dashes** - when exporting figures with dashed or dotted lines using either the ZBuffer or OpenGL (default for bitmaps) renderers, the dots and dashes can appear much shorter, even non-existent, in the output file, especially if the lines are thick and/or the resolution is high. For example:
```Matlab
plot(sin(linspace(0, 10, 1000)), 'b:', 'LineWidth', 4);
hold on
plot(cos(linspace(0, 7, 1000)), 'r--', 'LineWidth', 3);
grid on
export_fig test.png
```
generates:
![](https://farm4.staticflickr.com/3956/15592747732_f943d4aa0a_o_d.png)
This problem can be overcome by using the painters renderer. For example:
```Matlab
export_fig test.png -painters
```
used on the same figure generates:
![](https://farm4.staticflickr.com/3945/14971168504_77692f11f5_o_d.png)
Note that not only are the plot lines correct, but the grid lines are too.
**Transparency** - sometimes you might want a figure and axes' backgrounds to be transparent, so that you can see through them to a document (for example a presentation slide, with coloured or textured background) that the exported figure is placed in. To achieve this, first (optionally) set the axes' colour to 'none' prior to exporting, using:
```Matlab
set(gca, 'Color', 'none'); % Sets axes background
```
then use export_fig's `-transparent` option when exporting:
```Matlab
export_fig test.png -transparent
```
This will make the background transparent in PDF, EPS and PNG outputs. You can additionally save fully alpha-blended semi-transparent patch objects to the PNG format. For example:
```Matlab
logo;
alpha(0.5);
```
generates a figure like this:
![](https://farm4.staticflickr.com/3933/15405290339_b08de33528_o_d.png)
If you then export this to PNG using the `-transparent` option you can then put the resulting image into, for example, a presentation slide with fancy, textured background, like so:
![](https://farm6.staticflickr.com/5599/15406302920_59beaefff1_o_d.png)
and the image blends seamlessly with the background.
**Image quality** - when publishing images of your results, you want them to look as good as possible. By default, when outputting to lossy file formats (PDF, EPS and JPEG), export_fig uses a high quality setting, i.e. low compression, for images, so little information is lost. This is in contrast to MATLAB's print and saveas functions, whose default quality settings are poor. For example:
```Matlab
A = im2double(imread('peppers.png'));
B = randn(ceil(size(A, 1)/6), ceil(size(A, 2)/6), 3) * 0.1;
B = cat(3, kron(B(:,:,1), ones(6)), kron(B(:,:,2), ones(6)), kron(B(:,:,3), ones(6)));
B = A + B(1:size(A, 1),1:size(A, 2),:);
imshow(B);
print -dpdf test.pdf
```
generates a PDF file, a sub-window of which looks (when zoomed in) like this:
![](https://farm6.staticflickr.com/5613/15405290309_881b2774d6_o_d.png)
while the command
```Matlab
export_fig test.pdf
```
on the same figure produces this:
![](https://farm4.staticflickr.com/3947/14971168174_687473133f_o_d.png)
While much better, the image still contains some compression artifacts (see the low level noise around the edge of the pepper). You may prefer to export with no artifacts at all, i.e. lossless compression. Alternatively, you might need a smaller file, and be willing to accept more compression. Either way, export_fig has an option that can suit your needs: `-q<val>`, where <val> is a number from 0-100, will set the level of lossy image compression (again in PDF, EPS and JPEG outputs only; other formats are lossless), from high compression (0) to low compression/high quality (100). If you want lossless compression in any of those formats then specify a <val> greater than 100. For examp
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Various point cloud tools for Matlab.zip
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Various point cloud tools for Matlab
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Various point cloud tools for Matlab.zip (217个子文件)
CITATION.cff 478B
ImageSelection.class 1KB
icon_rgb.gif 890B
icon_bypc.gif 889B
icon_show_all.gif 875B
icon_histo.gif 872B
icon_save_screenshot.gif 871B
icon_choose_limits.gif 869B
icon_select_profile.gif 868B
icon_set_limits.gif 866B
icon_zoom_out.gif 863B
icon_select_inpolygon.gif 861B
icon_attributex.gif 861B
icon_print_parameter.gif 860B
icon_attributey.gif 859B
icon_options.gif 859B
icon_viewxz.gif 856B
icon_viewxy.gif 856B
icon_attributez.gif 856B
icon_viewyz.gif 855B
icon_toggle_axis.gif 855B
icon_markersize10.gif 844B
icon_markersize5.gif 841B
icon_markersize1.gif 835B
.gitattributes 378B
.gitignore 2KB
ImageSelection.java 1016B
settings.json 30B
LICENSE 1KB
export_fig.m 57KB
select.m 40KB
solve.m 28KB
plot_createToolbar.m 27KB
print2eps.m 25KB
ICP.m 19KB
export.m 14KB
msg.m 13KB
pointCloud.m 13KB
runICPMinimization.m 13KB
runICP.m 11KB
pcread.m 11KB
print2array.m 9KB
eps2pdf.m 8KB
conAffPoint2PlaneSimpleOLS.m 8KB
ghostscript.m 8KB
plot_createMenu.m 7KB
fix_lines.m 6KB
conSimPoint2PlaneOLS.m 6KB
im2gif.m 6KB
runcmd.m 6KB
plot_updatePlot.m 5KB
getVoxelHull.m 5KB
normals.m 5KB
plotPolar.m 5KB
isolate_axes.m 5KB
createRaster.m 5KB
transform.m 5KB
crop_borders.m 5KB
runICPInit.m 4KB
plot_updateMenus.m 4KB
globalICP.m 4KB
corrPoints.m 4KB
segmentation.m 4KB
addPrm.m 4KB
pdftops.m 3KB
user_string.m 3KB
plot.m 3KB
runICPStats.m 3KB
addAttribute.m 3KB
xyz2polar.m 3KB
runICPPlot.m 3KB
scatter3ext.m 3KB
plot_selectLimits.m 3KB
plot_setPrmAndPlot.m 3KB
assignIdxAdj.m 3KB
alphashape.m 3KB
img.m 3KB
uniformSampling.m 3KB
append_pdfs.m 3KB
runICPSelection.m 3KB
rejection.m 3KB
runICPPairList.m 2KB
dirext.m 2KB
copy.m 2KB
ecef2mapTrafo.m 2KB
map2ecefTrafo.m 2KB
addPC.m 2KB
addObs.m 2KB
transform.m 2KB
plot_updateHisto.m 2KB
info.m 2KB
polyMesh.m 2KB
plot_selectInPolygon.m 2KB
importOri.m 2KB
plotNormals.m 2KB
match.m 2KB
plot_selectProfile.m 2KB
plot_showPointInfo.m 2KB
runICPSaveResults.m 2KB
getPrmCstObs.m 2KB
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