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

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));

Answer 1

[Sean de Wolski]

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.

[John]

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

Answer 2

[Nitin Kapgate]

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.

[John]

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);