Membuat Foto IR dengan Photoshop

Apa itu foto IR?

Foto IR (Infra Red) adalah salah satu jenis foto yang selalu bikin saya kagum sekaligus penasaran…. pengen banget nyoba foto IR, soalnya warna ijo daun berubah jadi warna coklat atau putih seolah-olah daun-daun itu pada kering dan ngasih efek yang membuat foto itu seolah-olah dari dunia lain!!! Foto yang simpel pun bisa jadi keliatan beda kalau pakai filter IR. Dengan menggunakan IR Filter didepan lensa camera atau dengan oprek camera menjadi IR, kita bisa menghasilkan foto IR yang sangat menarik. Cuma kalo kita gak punya IR Filter atau kamera yang bisa dioprek jadi IR gimana dong?

Penasaran kan cara bikin efek foto IR dengan photoshop? Simak yuk tutorial saya kali ini. Dalam tutorial ini saya mencoba mencoba membuat foto biasa yang di foto pakai kamera biasa pula menjadi seperti Efek IR di Photoshop, yah walau nggak sebagus kalau kita motret pakai filter IR. Setidaknya lumayanlahh buat foto tampak IR-IR-an sampai kita punya kamera dan filter IR beneran hehehe.

Langkah 1

Seperti biasa kita buka program Photoshop, lalu bukalah foto yang akan digunakan untuk mengedit efek IR.

Langkah 2

Klik menu Layer – New Adjustment Layer – Channel Mixer – Ok

Langkah 3

Pada Output Channel RED, ubah Red = -39, Green = +148, Blue = –14, nah sekarang udah kelihatankan perubahannya? Sebenarnya untuk pengaturan Output Channelnya nggak terpatok harus selalu menggunakan nilai diatas, tapi tergantung pada warna dan cahaya pada foto kita. Jadi coba geser dan cari nilainya hingga mendapatkan warna yang diinginkan.

Langkah 4

Selanjutnya jika kita ingin mencari Tone IR yang berbeda pada Output Channel Blue ubah Red = -16, Green = +154, Blue = +1, maka akan menghasilkan warna yang berbeda pula, seperti gambar dibawah ini.

Langkah 5

Langkah selanjutnya, menghapus bagian gambar yang tidak kita inginkan ada perubahan warna pada bagian gambar tersebut dengan cara klik Brush Tool (B), pastikan warna Foreground hitam, atur nilai Opacity Brush pada Option Tool, dan aktifkan pada layer masknya, kemudian hapus pada bagian gambar yang diinginkan.

Untuk pengeditan lebih lanjut kita bisa menggunakan Selective Color, Curves, dan Hue/Saturation hingga menghasilkan warna yang diinginkan, hasilnya seperti contoh gambar dibawah ini. Selamat mencoba dan mudah-mudahan bermanfaat.

( Kutipan Blog ).

DIGITAL INFRARED (IR) COLOR PHOTOGRAPHY

PRESET COLOR BALANCE

If you just leave the camera white balance on sunny or use auto white balance you will find your images are predominantly red and look something like the bellow image:

What I like to do is create a custom preset white balance by taking a picture of grass, this way grass and most other foliage will look much more neutral and the red cast is more tolerable. Make sure to just have green grass covering the entire viewfinder. If the camera said the image is no good keep adjusting the compensation dial until it likes the image for the preset, I found on the D70 a compensation of -2 to -3 stops works fine.
You should end up with pictures that look like this one bellow:

CORRECTING FLAT IMAGES

It is quite common with infrared digital photography to end up with an image that is quite flat and low in contrast and tonal range, like the example bellow:

As you can see it is quite flat, but you can fix it in Photoshop by stretching the tonal range by going to Image – Adjustments – Levels. The histogram may look something like this:

Drag the left arrow (black) to the right until it just touches the point were the curve starts and drag the right arrow (white) to the left to the point were the curve starts. Here is a screen grab of what you should have done:

What you have done is stretch the compressed tonal range to the full range of pure black and pure white, giving you a much more contrast and “pop” to the image. The resulting image:

If you want more contrast you could drag the black and white points in the Levels dialog more inward, clipping some of the information and even further increasing the contrast. At this point if you would rather have a black and white image simply go to Image – Adjustments – Desaturate. But if you are interested in color infrared images then read on.

INVERTING CHANNELS TO CREATE A BLUE SKY

Using Photoshop we can swap the red and blue channels to change the red sky for a blue one. Here is our image:

With the image open select Image – Adjustments – Channel Mixer. With the channel mixer open select Red as the output channel and drag the Red channel slider until 0% is displayed. Then drag the Blue channel slider until 100% is displayed. Here is the screen grab:

Now select Blue as the output channel and drag the blue channel slider until 0% is displayed. Then drag the Red channel slider until 100% is displayed, Here is the screen grab:

Click ok and now you should have a blue sky. You can further tweak the color and saturation of the image by going to Image – Adjustments – Hue/Saturation. The image should look like this:

CORRECTING CLIPPED HIGHLIGHTS

On occasion you may run into an image that has strange looking cyan highlights, like the bellow example:

You can correct this in Photoshop by going to Image – Adjustments – Hue/Saturation.
In the Edit menu select Cyan as the color to work on. Your cursor will change to the color picker tool, find a patch of this cyan highlight in your image and click on it with your picker tool. Now drag the Saturation slider all the way to the left, making the cyan cast gray. The cast is gone but our highlights are now a muddy gray, to make the highlights normal highlights just drag the Lightness slider all the way to the right. Here is how the controls should look like:

The image should look like this:

Hope this tutorial was helpful in getting the most out of your digital infrared photography.