Image save with colormap
조회 수: 146(최근 30일)
Image Analyst 2016년 5월 10일
편집: Image Analyst 2016년 5월 10일
When you said "I made gray image to color image with jet colormap" it's not clear if you used
rgbImage = ind2rgb(grayImage, jet(256));
Or if you did
The first snippet creates a new full color RGB image, while the second snippet just displays the gray scale image with a pseudocolor lookup table. Which did you do?
Then you say " imshow function does not support the full scale". Not sure if you mean the size scale or the intensity scale. Anyway, imshow() supports both. The image will be scaled to fit so that the whole image will fit into whatever size the axes control is.
Then you say "the imshow function does not support the full ... size saving". You don't use imshow() to save the image, you use imwrite(), and imwrite() will save the full sized image.
If you want to display the full size image, you'll need to use a imscrollpanel. See attached demo from the Mathworks.
Amy Haskins 2016년 5월 10일
You're using your gray image like an indexed image and applying a colormap. The function ind2rgb will let you convert your gray image to RGB with a specified colormap and give you the full res image you're looking for.
If by save you mean save to disk, then you can use imwrite with the syntax imwrite(A,map,filename) to save the gray image and colormap, or you can save the RGB image with the imwite(A,filename) syntax after calling ind2rgb.