Fig images not readable

Question

Michele 2025-9-15，8:07

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2179956-fig-images-not-readable

评论： Michele 2025-9-17，13:48

Hi,

I've encountered a major problem with the fig files produced with this script:

function [SNR_dB_C1, PhaseNoise_mean_C1, SNR_dB_C2, PhaseNoise_mean_C2] = Misura_SNR_con_CORE(FullName, Figure_path)
close all;
% =====================
% LETTURA DEL FILE DATI
% =====================
ApplicationDir = GetExecutableFolder();
% Lettura Header e handle al file dati
[Header, RSR_fid] = RSR_ReadHeader(FullName, ApplicationDir);
% -------------------------------------------------------------------------------------------------------------------------------------------------------------
% Frame Iniziale e Finale di Elaborazione
FirstFrame = Header.N_Frame-1;
FinalFrame = Header.N_Frame;
% -------------------------------------------------------------------------------------------------------------------------------------------------------------
% Allocazione Memoria Dato Raw per Singolo Frame
Frame_RawData = []; 
for i = 1:Header.N_SubFrame 
    Frame_RawData = cat(1,Frame_RawData,{complex(zeros([1 Header.SubFrameLen_Sample_nelTempo(i)]),zeros([1 Header.SubFrameLen_Sample_nelTempo(i)]))}); 
end
% -------------------------------------------------------------------------------------------------------------------------------------------------------------
% ---------------------------- %
% --- Ciclo di Lettura --- %
% ---------------------------- %
wwwO1 = [];
wwwC1 = [];
wwwO2 = [];
wwwC2 = [];
indexdataO1 = find(strcmp(Header.SubFrame_Type,'O1-NF'));
indexdataC1 = find(strcmp(Header.SubFrame_Type,'C1-NF'));
indexdataO2 = find(strcmp(Header.SubFrame_Type,'O2-NF'));
indexdataC2 = find(strcmp(Header.SubFrame_Type,'C2-NF'));
for i = 1:Header.N_Frame
    %     
    % Individuazione Frame da Elaborare
    ElaborationEnabled = (i >= FirstFrame) && (i <= FinalFrame);
    %     
    % Acquisizione New Frame (se abilitata)
    [Frame_RawData, ~] = AcquisizioneNewFrame_1p2(RSR_fid, Header, Frame_RawData, ElaborationEnabled);
    
    if ~ElaborationEnabled, continue; end
    %% semi-MAN 1
    % Dato di Offset
    aux = Frame_RawData{indexdataO1};
    aux = imag(aux)+1i*real(aux);
    aux = aux.*(2^-Header.Sample_FractBit);
    wwwO1 = cat(3,wwwO1,aux);
    
    % Dato di Calibrazione
    aux = Frame_RawData{indexdataC1};
    aux = imag(aux)+1i*real(aux);
    aux = aux.*(2^-Header.Sample_FractBit);
    wwwC1 = cat(3,wwwC1,aux);
    
    %% semi-MAN 2
    % Dato di Offset
    aux = Frame_RawData{indexdataO2};
    aux = imag(aux)+1i*real(aux);
    aux = aux.*(2^-Header.Sample_FractBit);
    wwwO2 = cat(3,wwwO2,aux);
    
    % Dato di Calibrazione
    aux = Frame_RawData{indexdataC2};
    aux = imag(aux)+1i*real(aux);
    aux = aux.*(2^-Header.Sample_FractBit);
    wwwC2 = cat(3,wwwC2,aux);
end
fclose(RSR_fid);
% =====================
wwwC1 = wwwC1(Header.N_DeadSample_Start(indexdataC1)+1:end-Header.N_DeadSample_Stop(indexdataC1),:,:);
wwwO1 = wwwO1(Header.N_DeadSample_Start(indexdataO1)+1:end-Header.N_DeadSample_Stop(indexdataO1),:,:);
wwwC2 = wwwC2(Header.N_DeadSample_Start(indexdataC2)+1:end-Header.N_DeadSample_Stop(indexdataC2),:,:);
wwwO2 = wwwO2(Header.N_DeadSample_Start(indexdataO2)+1:end-Header.N_DeadSample_Stop(indexdataO2),:,:);
wwwC1 = squeeze(wwwC1);
wwwO1 = squeeze(wwwO1);
wwwC2 = squeeze(wwwC2);
wwwO2 = squeeze(wwwO2);
% Debug
ZP = 512;
w = repmat(chebwin(223,90)/sum(chebwin(223,90)),[1,size(wwwC1,2)]);
wwwC1f = (abs(fft(wwwC1.*w,ZP,1))).^2;
wwwC1f_mean = 10*log10(mean(wwwC1f,2));
wwwO1f = (abs(fft(wwwO1.*w,ZP,1))).^2;
wwwO1f_mean = 10*log10(mean(wwwO1f,2));
wwwC2f = (abs(fft(wwwC2.*w,ZP,1))).^2;
wwwC2f_mean = 10*log10(mean(wwwC2f,2));
wwwO2f = (abs(fft(wwwO2.*w,ZP,1))).^2;
wwwO2f_mean = 10*log10(mean(wwwO2f,2));
fs = 2083.333; %[KHz];
f = [0:ZP-1]/ZP*fs;
fig1 = figure('visible','off');
plot(f,wwwC1f_mean);
hold all;
plot(f,wwwO1f_mean);
grid on;
hold off;
title('GAIN & OFFSET - C1');
legend('GAIN', 'OFFSET');
xlabel('frequenza [kHz]');
ylabel('FFT [dBFS]');
ylim([-160 0]);
saveas(fig1,fullfile(Figure_path,'SNR_GAIN_OFFSET_C1'),'fig');
saveas(fig1,fullfile(Figure_path,'SNR_GAIN_OFFSET_C1'),'jpg');  %%Salvo l'immagine anche in formato jpeg per inserirla nel report
fig2 = figure('visible','off');
plot(f,wwwC2f_mean);
hold all;
plot(f,wwwO2f_mean);
grid on;
hold off;
title('GAIN & OFFSET - C2');
legend('GAIN', 'OFFSET');
xlabel('frequenza [kHz]');
ylabel('FFT [dBFS]');
ylim([-160 0]);
saveas(fig2,fullfile(Figure_path,'SNR_GAIN_OFFSET_C2'),'fig');
saveas(fig2,fullfile(Figure_path,'SNR_GAIN_OFFSET_C2'),'jpg');  %%Salvo l'immagine anche in formato jpeg per inserirla nel report
S_C1 = mean(abs(wwwC1(:)).^2);
Noise_C1 = mean(std(wwwO1,0,2).^2);
PhaseNoisef_C1 = std(fft(wwwC1.*w,ZP,1),0,2).^2;
PhaseNoise_mean_C1 = 10*log10((mean(PhaseNoisef_C1(150:200))*223)/Noise_C1);
S_C2 = mean(abs(wwwC2(:)).^2);
Noise_C2 = mean(std(wwwO2,0,2).^2);
PhaseNoisef_C2 = std(fft(wwwC2.*w,ZP,1),0,2).^2;
PhaseNoise_mean_C2 = 10*log10((mean(PhaseNoisef_C2(150:200))*223)/Noise_C2);
SNR_C1 = S_C1 / Noise_C1;
SNR_dB_C1 = 10*log10(SNR_C1);
SNR_C2 = S_C2 / Noise_C2;
SNR_dB_C2 = 10*log10(SNR_C2);
% Stdout output for .exe parsing
fprintf("%f\n",SNR_dB_C1);
fprintf("%f\n",PhaseNoise_mean_C1);
fprintf("%f\n",SNR_dB_C2);
fprintf("%f",PhaseNoise_mean_C2);
close all;
end

The script is compiled into an executable with Matlab 2019b and run on a PC with the MATLAB Runtime 9.7 runtime environment. The Fig files don't work.

Trying to open them on a PC with just the runtime or even with the full Matlab 2019b doesn't work; no images are displayed. Sometimes an error dialog box appears:

Obviously, the corresponding jpg file works.

Before compiling it into an executable, the code ran perfectly, and the resulting fig files worked.

I'm attaching jpg and fig files for checking/comparation.

Best regards,

Mike

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Answer 1

Stephen23 2025-9-15，10:46

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2179956-fig-images-not-readable#answer_1570316

编辑：Stephen23 2025-9-15，11:20

在 MATLAB Online 中打开

MathWorks explicitly documents savefig as the modern way to write FIG files compatible with R2014b+ (and it’s fine to call from deployed code). Replace these four lines:

saveas(fig1,fullfile(Figure_path,'SNR_GAIN_OFFSET_C1'),'fig');
saveas(fig1,fullfile(Figure_path,'SNR_GAIN_OFFSET_C1'),'jpg');
saveas(fig2,fullfile(Figure_path,'SNR_GAIN_OFFSET_C2'),'fig');
saveas(fig2,fullfile(Figure_path,'SNR_GAIN_OFFSET_C2'),'jpg');

with this:

% Ensure graphics are fully realized before saving
drawnow;
% Save modern, compact FIGs (robust when created from deployed code)
savefig(fig1, fullfile(Figure_path,'SNR_GAIN_OFFSET_C1.fig'), 'compact');
saveas (fig1, fullfile(Figure_path,'SNR_GAIN_OFFSET_C1.jpg'));
savefig(fig2, fullfile(Figure_path,'SNR_GAIN_OFFSET_C2.fig'), 'compact');
saveas (fig2, fullfile(Figure_path,'SNR_GAIN_OFFSET_C2.jpg'));

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Walter Roberson 2025-9-17，12:59

在 MATLAB Online 中打开

Anyway I don't know if there's a way to store the image into a fig file as visible without actually showing it.

NO

By the way, you can do

fig = openfig('IMMAGINE.fig', 'visible');

instead of setting visible on after the openfig.

Michele 2025-9-17，13:48

nice to know...

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Fig images not readable

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Fig images not readable

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