For the red component, the bright area corresponds to the red and pink flowers, orange leaves and butterfly As for the green component, the bright area corresponds to the green grass and green leaves For the blue component, the bright area correponds to pink flowers and since there is few blue objects in the original figure, the overall brightness of the blue component is small. Question: Can you look at different objects of the Flower image (e.g., flowers of different colors, green leaves, and the butterfly) and make sense of the bright or dark values of the red, green and blue components?ДЄnswer: Fiuger(2) shows the brightness of red, green and blue components. The results of having partial color components mimic what you may see when some R/G/B pin contact of a display connector (such as the VGA traditionally on computers/laptops) becomes loose. You can change to show the results of different orders of adding up the color components. Subplot(1, 4, 4), imshow(img2), title( '3 components: RGB') Subplot(1, 4, 2), imshow(img2), title( '1 component: Blue') Img2 = uint8( img2 ) %% ensure correct data type of unsigned 8-bit integer Img2 = zeros( size(img1) ) %% initialize arrays of the same size as img1 Merging RGB components: figure(3), subplot(1, 4, 1), imshow(img1), title( 'Original') Subplot(2, 2, 4), imshow(img1_b), title( 'Blue'), colorbar Subplot(2, 2, 3), imshow(img1_g), title( 'Green'), colorbar Subplot(2, 2, 2), imshow(img1_r), title( 'Red'), colorbar

8-bit representation gives a scale of 0 to 255, with 0 being the darkest and 255 the brightness in the particular color component. The overall color image is thus stored in an array of three indexing variables, as you can see in the summary of Workspace in MATLAB, or run the function size.ДЄ R/G/B component is represented by dafault using 8 bits (unsigned 8-bit integer or 'uint8' in MATLAB data type. The horizontal and vertical dimensions of each color matrix matches the size of the image in unit of pixels. A matrix is essentially an array indexed by two indexing variables typically for row and column.Д®ach of the three color matrices can be specified by the third indexing number - note the number 1 in the example below img(:,:,1), and so on.

In image/video processing, it is also referred to as R/G/B channels. By default, a color image is stored by MATLAB using 3 matrices, each representing red, green and blue components of pixels.

Convert image format matlab