Import a picture in a workspace ，Unsupported input format for From Workspace

img_path is the selected picture in MATLAB.Image input to system2.

Unsupported input format for From Workspace block 'sy3/From Workspace'. Available formats are double non-complex matrix, a structure with or without time, or a structure with MATLAB timeseries as leaf nodes. All formats require the data to be finite (not Inf or NaN).

[Paul]

What is the format of the image data to be imported from the workspace? Is the image data constant or changing as a function of time?

[Image Analyst]

Here are the formats it understands.

imformats

 
EXT       ISA     INFO        READ      WRITE     ALPHA  DESCRIPTION                     
-----------------------------------------------------------------------------------------
bmp       isbmp   imbmpinfo   readbmp   writebmp  0      Windows Bitmap
cur       iscur   imcurinfo   readcur             1      Windows Cursor resources
fts fits  isfits  imfitsinfo  readfits            0      Flexible Image Transport System
gif       isgif   imgifinfo   readgif   writegif  0      Graphics Interchange Format
hdf       ishdf   imhdfinfo   readhdf   writehdf  0      Hierarchical Data Format
ico       isico   imicoinfo   readico             1      Windows Icon resources
j2c j2k   isjp2   imjp2info   readjp2   writej2c  0      JPEG 2000 (raw codestream)
jp2       isjp2   imjp2info   readjp2   writejp2  0      JPEG 2000 (Part 1)
jpf jpx   isjp2   imjp2info   readjp2             0      JPEG 2000 (Part 2)
jpg jpeg  isjpg   imjpginfo   readjpg   writejpg  0      Joint Photographic Experts Group
pbm       ispbm   impnminfo   readpnm   writepnm  0      Portable Bitmap
pcx       ispcx   impcxinfo   readpcx   writepcx  0      Windows Paintbrush
pgm       ispgm   impnminfo   readpnm   writepnm  0      Portable Graymap
png       ispng   impnginfo   readpng   writepng  1      Portable Network Graphics
pnm       ispnm   impnminfo   readpnm   writepnm  0      Portable Any Map
ppm       isppm   impnminfo   readpnm   writepnm  0      Portable Pixmap
ras       isras   imrasinfo   readras   writeras  1      Sun Raster
svs       istif   imtifinfo   readtif             0      Aperio ScanScope Virtual Slide
tif tiff  istif   imtifinfo   readtif   writetif  0      Tagged Image File Format
xwd       isxwd   imxwdinfo   readxwd   writexwd  0      X Window Dump

What is the format of your image?

[wang]

bmp

The format is constant

Answer 1

[Walter Roberson]

https://www.mathworks.com/help/simulink/ug/load-data-using-the-from-workspace-block.html

The From Workspace block does not permit specifying a file name. It has no capacity to read images itself. It does not support any image type.

From Workspace does support 2D arrays of double, but when you use that, the first column of the array must be times, and the remaining columns are the signal values at that time.

The model you show the diagram appears to be using two MATLAB Function Blocks, one of which, System2, appears to be accepting an image path as a signal, and appears to be emitting the image data, and the number of rows and columns, and an additional value that is not clear. The second MATLAB Function Block, System3, appears to be accepting the rows and columns, and mystery parameter, and processing them to do something that results in image data.

The error message you posted is for a From Workspace block named sy3 which does not appear in your model -- not unless sy3 is what is marked as img_path .

If you are trying to use From Workspace to load an image file name, you have a problem that a file name is not a time-based signal, and is not one of the datatypes that From Workspace handles. I suggest that instead you use a String Constant https://www.mathworks.com/help/simulink/slref/stringconstant.html -- which you can set_param at the MATLAB level.

[wang]

This is where the picture is stored. All I have to do is pass in the image location and system2 reads the image information. But now I don't know how to do that

[wang]

The String constant module was also used incorrectly