"Add one" to every color in an image

Question

You would simply take this image and make every color added one to every hexadecimal digit. For example, #49de5f would become #5aef60 (with the 9 looping to an a, and the f looping to a 0.)

This would also mean that all white (#ffffff) would become black (#000000) because all f loops back to 0, but all black will become a lighter shade of black (#111111).

Scoring is based on the least number of bytes used, as this is a code-golf question.

Use the below image as the input image for your code, and put the output image of your code into your answer.

If you want to, you can also use this other rainbow image:

Answer 1

Pyke, 17 13 bytes

.Fh16j%ijcjs 8{

Try it here!

.F            - for i in deep_for(input):
  h16%        -    (i+1)%16
          +   -   ^+V
      i16+    -    (i+16)
           8{ -  unset_bit(8, ^)

Takes input as a 3d integer array of pixels and outputs in the same format

Answer 2

Mathematica, 78 bytes

Image@Apply[16#+#2&,Mod[IntegerDigits[#~ImageData~"Byte",16,2]+1,16]/255,{3}]&

Takes and returns an image object (to create an image object, just paste the image into Mathematica).

Result for the test case:

Taking input and returning output as a 3D array of integer channel values, this reduces to 51 bytes:

Apply[16#+#2&,Mod[IntegerDigits[#,16,2]+1,16],{3}]&

But those meta posts don't have an overwhelming amount of support yet, so I'm going with the 78-byte version for now.

Answer 3

Python, 226 bytes

Now, it's valid !

Use the Pillow library.

from PIL import Image
m=Image.open(input()).convert("RGB")
for y in range(m.size[1]):
 for x in range(m.size[0]):
    t=m.getpixel((x,y))
    h=t[0]+(t[1]<<8)+(t[2]<<16)+1118481
    m.putpixel((x,y),(h&255,h>>8&255,h>>16&255))
m.show()

Output:

Thanks to @TuukkaX for saving 9 bytes !
Thanks to @mbomb007 for saving 18 bytes !

Answer 4

Verilog, 220 bytes:

• Programs may take input as an array of RGB pixel values with dimensions
• Programs may output via an array of RGB pixel values with dimensions

It's currently not clear as to how the dimensions are to be provided and if the array is to be streamed or provided all at once. I'm going to stream it 8 bits at a time using a clock signal (with a valid-data flag that goes low after the entire image has been processed) and input/output the dimensions as 32-bit integers:

module a(input[31:0]w,input[31:0]h,input[7:0]d,input c,output[31:0]W,output[31:0]H,output reg[7:0]D,output reg v=0);assign W=w;assign H=h;reg[65:0]p=1;always@(posedge c) begin v<=(p<3*w*h); p<=p+v; D<=d+17; end endmodule

Answer 5

Dyalog APL, 21 15 bytes

Programs may output as a matrix of RGB pixel values

I assume output may be in the same format.

New solution takes matrix of values [[r,g,b,r,g,b],[r,g,b,…

16⊥16|1+16 16⊤⎕

Explanation

⎕ get numeric input
16 16⊤ convert to 2-digit base 16
1+ add 1, i.e. 0 → 1, 1 → 2, 15 → 16
16| modulus 16, i.e. 16 → 0
16⊥ convert from base 16

Example

      ⊢m←2 6⍴90 239 96 255 255 255 0 0 0 239 239 239
90 239 96 255 255 255
 0   0  0 239 239 239
      16⊥16|1+⎕⊤⍨2/16
⎕:
      m
107 240 113   0   0   0
 17  17  17 240 240 240

---

Old 21 byte solution takes matrix of [["RRGGBB","RRGGBB"],["RRGGBB",…

{n[16|1+⍵⍳⍨n←⎕D,⎕A]}¨

Needs ⎕IO←0, which is default on many systems.

Explanation

{…}¨ for each RGB 6-char string, represent it as ⍵ and do:
n←⎕D,⎕A assign "0…9A…Z" to n
⍵⍳⍨ find indices of the individual characters in n
1+ add one to the index, i.e. 0 → 1, 1 → 2, 15 → 16
16| modulus 16, i.e. 16 → 0
n[…] use that to index into n

Example

      f←{n[16|1+⍵⍳⍨n←⎕D,⎕A]}¨ 
      ⊢p←2 2⍴'5AEF60' 'FFFFFF' '000000' 'EFEFEF'
┌──────┬──────┐
│5AEF60│FFFFFF│
├──────┼──────┤
│000000│EFEFEF│
└──────┴──────┘
      f p           
┌──────┬──────┐
│6BF071│000000│
├──────┼──────┤
│111111│F0F0F0│
└──────┴──────┘

Answer 6

C - 114 113 70 66 61 72 67 bytes

Here's the code (with support for Martin Ender's test case (without it's 60b)):

main(c,b){for(;~(b=getchar());putchar(c++<54?b:b+16&240|b+1&15));}

And here is less obfuscated version:

main( c, b ) //Defaults to int
{
    //Get characters until EOF occurs
    //Copy first 54 bytes of header, later add 1 to each hexadecimal digit
    for ( ; ~( b = getchar( ) ); putchar( c++ < 54 ? b: b + 16 & 240 | b + 1 & 15 ) ); 
}

Compile and run with gcc -o color colorgolf.c && cat a.bmp | ./color > b.bmp

This code supports works with bitmaps. To convert png files to bmp, I used following command: convert -flatten -alpha off png.png a.bmp

Code assumes, that bmp header is 54 bytes long - in this case it works, but I'm not sure if I'm not discreetly breaking something.

Also, this is the rainbow:

Answer 7

Java 142 bytes

public BufferedImage translateColor(BufferedImage image){
  for(int i=-1;++i<image.getWidth();)
    for(int j=-1;++<image.getHeight();)
      image.setRGB(i,j,image.getRGB(i,j)+1118481);
  return image;
}

Golfed:

BufferedImage t(BufferedImage i){for(int x=-1;++x<i.getWidth();)for(int y=-1;++y<i.getHeight();)i.setRGB(x,y,i.getRGB(x,y)+1118481);return i;}

Answer 8

R, 302 bytes

Far from perfect, but here goes:

a<-as.raster(imager::load.image(file.choose()));l=letters;n=as.numeric;d=a;f=function(x){if(suppressWarnings(is.na(n(x)))){if(x=="F")"0" else{l[match(x,toupper(l))+1]}}else{if(x==9)"A" else as.character(n(x)+1)}};for(o in 1:90){for(g in 1:200){for(h in 2:7){substr(d[o,g],h,h)<-f(substr(a[o,g],h,h))}}}

Explanation:

a<-as.raster(imager::load.image(file.choose()));  //chooses file
l=letters;n=as.numeric;d=a;                      //shortens some names and creates
                                                   duplicate variable to modify

f=function(x){                                //creates a function that takes in a
   if(suppressWarnings(is.na(n(x)))){            character type and checks whether it is
      if(x=="F")"0"                              a number or letter.
      else{l[match(x,toupper(l))+1]}}            Returns the converted letter or number.                               
   else{                                   
      if(x==9)"A"                         
      else as.character(n(x)+1)}         
};                                      

for(o in 1:90){                       //loops through every single hex digit and applies
   for(g in 1:200){                     the converting function, modifying the duplicate
      for(h in 2:7){                    variable. Now you have 2 images =D

         substr(d[o,g],h,h)<-f(substr(a[o,g],h,h))

      }
   }
}