I needed to overlay a small histogram onto a large image, specifically in the bottom right hand corner. However, I could not do this in an intuitive and computationally cheap fashion due to inexperience. There are two images, the histogram

imgHist=Histogram[{filtGreenLengths, filtRedLengths}, 20, Background -> White,
  ImageSize -> {200, 100}]

and the main image


I first tried to directly perform the overlay, using the code

finalPic = ImageCompose[image, {imgHist,0.5}, Scaled[{0.9, 0.085}]]

but the ImageCompose function freaked out and stretched imgHist to equal the size of image and then moved the enormous expanded imgHist to the bottom right hand corner. I could not find an option to turn off this auto-stretching in the documentation. In the end, I had to do this

imgHist = 
   Histogram[{filtGreenLengths, filtRedLengths}, 20, 
    Background -> White, 
    ImageSize -> {200, 100}], {ImageDimensions[image][[1]], 
    ImageDimensions[image][[2]]}, Padding -> Transparent];

in order to get the result I wanted. This appears to be pretty silly and redundant, so what would be a less hackish way of doing this?


Does something like this go in the right direction?

enter image description here


You could try using an epilog with inset though I'm not sure how much more efficient that'd be compared to the method you have.

TestData = {10, 14, 8, 6, 4, 3, 2.5, 2, 1.5, 1};
TestDataSmall = {2.5, 1.8, 1.5, 1.3, 1.2, 1.};
plotSmall = Histogram[TestDataSmall, PlotRange -> {0, 6}, ImageSize -> {400, 150}];
Histogram[TestData, PlotRange -> {0, 16}, 
    Epilog -> Inset[plotSmal], 
                    Scaled[{0.75, 0.75}]] ]

You should have typed in documentation center that what you are looking for: "overlay" :) Usualy when I'm looking for anything it gives me something.

Also, I always scan See also links (there is Inset in ImageCompose page)

pic = Image[Import["ExampleData/lena.tif"], ImageSize -> 400]
hist = ImageHistogram[pic, ImageSize -> {150, 50}, Background -> Black]

        }, All, 2, Alignment -> {1, -1}]

enter image description here


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