尝试研究图像压缩的倍频程错误
 

首先，我说我爱你。谢谢。

下一个业务订单：

octave-3.2.3:8> xin = imread('3Phone.png'); octave-3.2.3:9> colormap(gray(256)); octave-3.2.3:10> image(xin); error: invalid value for array property "cdata" error: set: expecting argument 2 to be a property name error: set: expecting argument 4 to be a property name error: set: expecting argument 6 to be a property name error: called from: error: /Applications/Octave.app/Contents/Resources/share/octave/3.2.3/m/image/__img__.m at line 57, column 7 error: /Applications/Octave.app/Contents/Resources/share/octave/3.2.3/m/image/image.m at line 75, column 5 error: A(I): Index exceeds matrix dimension. error: called from: error: /Applications/Octave.app/Contents/Resources/share/octave/3.2.3/m/plot/__go_draw_axes__.m at line 383, column 22 error: /Applications/Octave.app/Contents/Resources/share/octave/3.2.3/m/plot/__go_draw_figure__.m at line 92, column 3 error: /Applications/Octave.app/Contents/Resources/share/octave/3.2.3/m/plot/gnuplot_drawnow.m at line 91, column 5 octave-3.2.3:10> 我在Mac OS X（雪豹）上使用Octave 3.2.3。这是显示已读取并存储的图像的非常基本的尝试。任何解决此问题的帮助将不胜感激。谢谢！


回答：
我的猜测是，当您阅读png文件时-确保它是灰度文件。否则，存在3个矩阵（RGB）。因此，您不能使用灰度色图。

如果2Phone.png是彩色图像，请尝试（至少这是我在Matlab中所做的）：

xin = imread('3Phone.png'); image(xin(:, :, 1); colormap(gray(256)); 这将仅显示R矩阵。

更好的是使用[URL="http://www.mathworks.com/access/helpdesk/help/toolbox/images/rgb2gray.html"]RGB2Gray[/URL] （当然，请使用等效的Octave）。



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