How to create a gray scale image
24 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
maria
el 29 de Nov. de 2013
Comentada: maria
el 1 de Dic. de 2013
Hi, i want to create a gray scale image in matlab so I write a matrix 5x7 lets say A=[0 0 0 0 0 0 0; 80 80 80 80 80 80 80;200 200 200 200 200 200 200; 110 110 110 110 110 110 110; 160 160 160 160 160 160 160;255 255 255 255 255 255 255] . Then i use the imshow command and I expect an image where every row has a different intensity, the first black, the last white and the others with intermediate values. Instead of that i get a picture where only the first row is black and the rest of them are white. what am i doing wrong?
0 comentarios
Respuesta aceptada
Image Analyst
el 29 de Nov. de 2013
A is a double. Cast it to uint8:
imshow(uint8(A));
or else use [] if you want to keep A as a double:
imshow(A, []);
7 comentarios
Image Analyst
el 1 de Dic. de 2013
It's fine if it's a double. You'll get more accuracy that way. You only need to convert it to an integer if you want to do certain things, like store it in a standard image format.
Más respuestas (0)
Ver también
Categorías
Más información sobre Image Processing Toolbox en Help Center y File Exchange.
Productos
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!