Hello, I am trying to estimate the background of this image. One way I would like to try is to break the image up into small regions and take the minium value in each region and then peform a surface fit to these. The aim would be to then subtract this from my main image (one thing I definetly need is smoothness, i.e no sharp jumps between regions)
My raw image showing the regions

The min in each region is obtained via blockproc (data attached)
blockMin =
183.00 185.00 184.00 195.00 198.00 185.00 203.00
194.00 204.00 188.00 192.00 217.00 190.00 212.00
202.00 213.00 204.00 191.00 208.00 210.00 209.00
204.00 205.00 225.00 204.00 202.00 210.00 211.00
225.00 240.00 219.00 209.00 210.00 227.00 210.00
225.00 213.00 217.00 241.00 223.00 226.00 223.00
219.00 222.00 232.00 233.00 217.00 238.00 231.00

Very strangely, the heatmap and surf plot of the same data set is showing a difference (I know I must rotate the surf plot, but its clear the peak regions are in different positions (shown by green circles). On the heatmap, the value of 241 is on the 3rd row, yet on the surf plot its on the 2nd row and on the wrong column.

This is my code (Im showing the pure surf plot above, not the smoothdata2 version)
blockFwhm;
figure
h=heatmap(blockFwhm, ‘Colormap’,cool,’FontSize’,10); % app.PanelScan,
h.CellLabelFormat = ‘%.0f’;

figure
ax1=subplot(1,2,1); ax2=subplot(1,2,2);
surf(ax1,blockFwhm); colormap cool; colorbar

% Try to smotth the data *** Although this isn’t very good so
% far
B=smoothdata2(blockFwhm);
s=surf(ax2,B); colormap cool;Hello, I am trying to estimate the background of this image. One way I would like to try is to break the image up into small regions and take the minium value in each region and then peform a surface fit to these. The aim would be to then subtract this from my main image (one thing I definetly need is smoothness, i.e no sharp jumps between regions)
My raw image showing the regions

The min in each region is obtained via blockproc (data attached)
blockMin =
183.00 185.00 184.00 195.00 198.00 185.00 203.00
194.00 204.00 188.00 192.00 217.00 190.00 212.00
202.00 213.00 204.00 191.00 208.00 210.00 209.00
204.00 205.00 225.00 204.00 202.00 210.00 211.00
225.00 240.00 219.00 209.00 210.00 227.00 210.00
225.00 213.00 217.00 241.00 223.00 226.00 223.00
219.00 222.00 232.00 233.00 217.00 238.00 231.00

Very strangely, the heatmap and surf plot of the same data set is showing a difference (I know I must rotate the surf plot, but its clear the peak regions are in different positions (shown by green circles). On the heatmap, the value of 241 is on the 3rd row, yet on the surf plot its on the 2nd row and on the wrong column.

This is my code (Im showing the pure surf plot above, not the smoothdata2 version)
blockFwhm;
figure
h=heatmap(blockFwhm, ‘Colormap’,cool,’FontSize’,10); % app.PanelScan,
h.CellLabelFormat = ‘%.0f’;

figure
ax1=subplot(1,2,1); ax2=subplot(1,2,2);
surf(ax1,blockFwhm); colormap cool; colorbar

% Try to smotth the data *** Although this isn’t very good so
% far
B=smoothdata2(blockFwhm);
s=surf(ax2,B); colormap cool; Hello, I am trying to estimate the background of this image. One way I would like to try is to break the image up into small regions and take the minium value in each region and then peform a surface fit to these. The aim would be to then subtract this from my main image (one thing I definetly need is smoothness, i.e no sharp jumps between regions)
My raw image showing the regions

The min in each region is obtained via blockproc (data attached)
blockMin =
183.00 185.00 184.00 195.00 198.00 185.00 203.00
194.00 204.00 188.00 192.00 217.00 190.00 212.00
202.00 213.00 204.00 191.00 208.00 210.00 209.00
204.00 205.00 225.00 204.00 202.00 210.00 211.00
225.00 240.00 219.00 209.00 210.00 227.00 210.00
225.00 213.00 217.00 241.00 223.00 226.00 223.00
219.00 222.00 232.00 233.00 217.00 238.00 231.00

Very strangely, the heatmap and surf plot of the same data set is showing a difference (I know I must rotate the surf plot, but its clear the peak regions are in different positions (shown by green circles). On the heatmap, the value of 241 is on the 3rd row, yet on the surf plot its on the 2nd row and on the wrong column.

This is my code (Im showing the pure surf plot above, not the smoothdata2 version)
blockFwhm;
figure
h=heatmap(blockFwhm, ‘Colormap’,cool,’FontSize’,10); % app.PanelScan,
h.CellLabelFormat = ‘%.0f’;

figure
ax1=subplot(1,2,1); ax2=subplot(1,2,2);
surf(ax1,blockFwhm); colormap cool; colorbar

% Try to smotth the data *** Although this isn’t very good so
% far
B=smoothdata2(blockFwhm);
s=surf(ax2,B); colormap cool; image, heatmap, surf, smoothdata2 MATLAB Answers — New Questions

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