How to save images!?

Question

Rayan Matlob 2022-7-5

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1754225-how-to-save-images

评论： DGM 2022-7-6

Hello, for the next code, when i run the code i get a subplot as bellow,

But when i save them, they turn into black and white.

Good_RGB=cv2.imread("R_9_1_GSM_5/Good/Original_images/"image_name)
fig, RGB = plt.subplots(1, 3, figsize=(10,10))
for j in range(3):
    RGB[j].imshow(Good_RGB[:,:,j])
    RGB[j].set_title(rgb_list[j], fontsize = 15)
    cv2.imwrite('R_9_1_GSM_5/Good/Red/'+image_name, (Good_RGB[:,:,0]*2))
    cv2.imwrite('R_9_1_GSM_5/Good/Green/'+image_name,(Good_RGB[:,:,1]*2))
    cv2.imwrite('R_9_1_GSM_5/Good/Blue/'+image_name,(Good_RGB[:,:,2]*2))

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Answer 1

DGM 2022-7-5

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1754225-how-to-save-images#answer_1001005

编辑：DGM 2022-7-6

在 MATLAB Online 中打开

I have no idea what this code is, but the images are grayscale. When you isolate one color channel, that's all it is. It's a single-channel intensity image. There is no color information.

The images shown are represented as pseudocolor images -- they have a colormap applied to them. In this case, it's probably something similar to parula() or winter(). Use ind2rgb() to apply the selected colormap to the image and create an actual color image.

inpict = imread('peppers.png');

[R G B] = imsplit(inpict);

montage({R G B}) % they're all grayscale

cmap = parula(256);

R = ind2rgb(R,cmap);

G = ind2rgb(G,cmap);

B = ind2rgb(B,cmap);

montage({R G B}) % they're all colormapped using parula()

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Rayan Matlob 2022-7-6

编辑：Rayan Matlob 2022-7-6

在 MATLAB Online 中打开

%I rewrite the code in a simple way, i need to save the previeus subplot as shown in the question. thanks
Good_RGB=cv2.imread("R_9_1_GSM_5/Good/Original_images/"image_name)
fig, RGB = plt.subplots(1, 3, figsize=(10,10))
for j in range(3):
    RGB[j].imshow(Good_RGB[:,:,j])
    
    cv2.imwrite('R_9_1_GSM_5/Good/Red/'+image_name, (Good_RGB[:,:,0]*2))
    cv2.imwrite('R_9_1_GSM_5/Good/Green/'+image_name,(Good_RGB[:,:,1]*2))
    cv2.imwrite('R_9_1_GSM_5/Good/Blue/'+image_name,(Good_RGB[:,:,2]*2))