Increase contrast in geoscatter

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Andres Salomon Fielbaum Schnitzler 2021-11-19

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https://ww2.mathworks.cn/matlabcentral/answers/1591039-increase-contrast-in-geoscatter

评论： Andres Salomon Fielbaum Schnitzler 2021-11-22

Hi, all.

I am using geoscatter to create a video, by concatenating many frames one after the other. When I create just a single image (the image at the bottom below), the background looks really nice, and the streets can be easily identified. However, when I run the video, the contrast of the background becomes much lighter, and the streets are hardly noticeable (the top image below). Do you know how can I fix this? I am not sure if it relates with how do I create the images, or how do I create the video. I am attaching the relevant code below. Thanks in advance

geoscatter(StopsToPlot(:,1),StopsToPlot(:,2),0.01,'y','s','filled')
hold on
for k=1:numel(Border)-1
    O=NodesExtended(Border(k),:);
    D=NodesExtended(Border(k+1),:);
    geoplot([O(1),D(1)],[O(2),D(2)],'b');
end
geoscatter(StopsToPlot(:,1),StopsToPlot(:,2),0.01,'y','s','filled')
hold on
geoplot(EdgesToStop(1,1:2),EdgesToStop(1,3:4),'k');
for k=1:numel(Border)-1
    O=NodesExtended(Border(k),:);
    D=NodesExtended(Border(k+1),:);
    geoplot([O(1),D(1)],[O(2),D(2)],'b');
end
geoscatter(BVeh(:,1),BVeh(:,2),50,[0.4940 0.1840 0.5560],'filled','d')
text(-33.4,-70.54,TextClock,'FontSize',20)
hold off

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Andres Salomon Fielbaum Schnitzler 2021-11-22

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Thanks!

To generate the video, I am using first:

v = VideoWriter('Test4.avi');
v.FrameRate=30;
open(v);

And then, inside a for cycle:

    frame=getframe(gcf);
    writeVideo(v,frame);
    hold off

Maybe there is something I can change there?

Thanks again

Andres Salomon Fielbaum Schnitzler 2021-11-22

Two relevant extra comments:

1) Increasing the quality of the video through v.quality does not change the solution significantly.

2) Using Quicktime instead of VLC to watch the video makes the solution to look much better. It still looks worse than the original image, and I would be very happy if I can enhance the video further, but it does look decent in Quicktime.

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