How to convert image .mat back to the mlreportgen.dom.Image object?

Question

John 2021-1-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/708978-how-to-convert-image-mat-back-to-the-mlreportgen-dom-image-object

编辑： John 2021-1-19

In report generator, an Image object can be inserted in the report in this way:

mlreportgen.dom.*
rpt = Document('my_report','pdf');
img = Image('my_image.jpg');
img.Style  = {Width('5in'),HAlign('center')};
append(rpt, img);

Now, the image is already read into .mat data with:

read_img = imread('my_image.jpg'); % now, read_img is in 640x480x3 uint8 format

How to create an Image object as above but from this later read_img data?

img = Image(anyway_some_function(read_img));

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Answer 1

Sean de Wolski 2021-1-19

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https://ww2.mathworks.cn/matlabcentral/answers/708978-how-to-convert-image-mat-back-to-the-mlreportgen-dom-image-object#answer_601604

You'll need to write the image back to disk as the report generator needs to deserialize it from this format into the report. If the image is in a figure, you can use print, exportgraphics or use my FigureDeployer class which wraps around it and makes it easy.

Alternatively, you could use the Figure command with the mlreportgen.report.* api but this would require changing other things about your reporter structure.

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John 2021-1-19

编辑：John 2021-1-19

I thought it wasn't beautiful, but did in the same way as yours.

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Answer 2

Nitin Kapgate 2021-1-13

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/708978-how-to-convert-image-mat-back-to-the-mlreportgen-dom-image-object#answer_596788

在 MATLAB Online 中打开

You can create an Image Object from the "read_img" data using the following code:

read_img = imread('my_image.jpg'); % Read the image
img = image(read_img);

You can refer to the documentation of "image" function to learn more about it.

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John 2021-1-19

在 MATLAB Online 中打开

This doesn't resolve the issue:

import mlreportgen.dom.*
read_img = imread('my_image.jpg');
img = image(read_img); % this runs, but forces an image display
report_image = Image(img); % this still give error below

What we want is an mlreportgen.dom.Image object. Above command generates the error:

Error using mlreportgen.dom.Image
Invalid input for argument 1 (p0):
Value must be a character vector or string scalar.
Error in Untitled (line 4)
report_image = Image(img);