Colorizing B&W Aerial Map

Hello, people.
I have this project that I need to colorize Hi-res B&W Aerial map. I also have same but low-res Color Aerial map.

I wonder if there is any way that use the low-res and pick up the color and colorize the hi-res B&W aerial well?

All I need to is get the greens (trees &grass) and grey (streets) to be colorized.

I hope this make any sense to you guys.

If someone knows the best way, I will super appriciate it!

Thanks.

noboru

If they're identical, just put the grayscale pic's layer below the colored pic. Then set the Blending mode of colored pic's layer to Color.

Thank you for the quick reply.

It can be identical, however, the problem would be the color map is the very low res, maybe not even quarter res of B&W one.

I haven't tried what you suggested me yet..

So the resolution doesn't really matter if it's blending?

Sorry, I guess I should have tried then see how it comes out and reply to your post.

Just wanted to say thanks for the quick reply.

I'm going to try it now, and see how it will turn out.

noboru

Change the image to RGB if it isnt already. Make a new layer on top of the image, set the blending mode to "overlay" and add in the color you want to the area(s) that need color.

For multiple colors, I'd use multiple layers, but it can be done on one layer.

Correction: the blending mode should be "color", NOT "overlay".

i personally think multiply would be the best blending mode for the job.

could you show us the pic wyou wanna use ?

I still say overlay is better for color overlaying than the color blending mode.

yah... it really depends on what you want to do. the best answer is to experiment with the different layer modes...

The best blending mode is "color". Not because I figured that out on my own, but because I saw this in numerous tutorials on the net, my Photoshop 6 Wow Book, Photoshop restoration book, my video course etc. If you want the exact turorials, pages in the book, or name of the video course I'm happty to mail them.
Coloring B&W images is alays done with "color" blending mode. I tried it out myself too and it really makes sense.