Ditulis oleh Steve Patterson. Dalam
tutorial Efek Photoshop,
kita akan belajar bagaimana untuk mensimulasikan tampilan fotografi
inframerah di Photoshop. Kami akan mengambil melihat palet Channels
Photoshop dan melihat bagaimana mengisolasi saluran warna serta
bagaimana menerapkan filter ke saluran warna, kita akan menggunakan
penyesuaian lapisan, khususnya lapisan Channel Mixer penyesuaian untuk
menyesuaikan berapa banyak dampak setiap saluran individu telah pada
gambar, kita akan menggunakan modus campuran lapisan beberapa yang
berbeda, menambahkan beberapa kebisingan, dan pada akhirnya, melihat
bagaimana membawa beberapa warna dari gambar asli kembali ke efek.
Istilah
"inframerah" secara harafiah berarti "di bawah merah", dan tanpa masuk
ke teori ilmu pengetahuan atau warna, itu berarti kita sebagai manusia
tidak bisa melihatnya. Namun meskipun Anda dan saya tidak dapat melihat
cahaya inframerah, kamera digital yang paling bisa, dan dengan
penggunaan filter lensa inframerah, fotografi inframerah dapat membawa
cahaya dalam kisaran terlihat kami, menangkap dan menciptakan gambar
yang memiliki benar-benar unik, misterius dunia lain dan melihat ke
mereka. Untungnya, tampilan yang sama dapat dibuat dengan mudah di
Photoshop, seperti akan kita lihat pada tutorial ini.
Karena
objek yang berbeda di dunia mencerminkan jumlah yang berbeda dari cahaya
inframerah, hasil yang Anda dapatkan dengan efek ini akan tergantung
banyak pada jenis foto Anda menggunakannya dengan. Adegan di luar ruang
dengan banyak pohon hijau dan foilage cenderung bekerja terbaik, dan
itulah yang saya akan menggunakan untuk tutorial ini, namun mencobanya
dengan jenis lain dari foto juga untuk melihat apa yang Anda dapatkan.
Berikut adalah gambar asli saya akan menggunakan untuk tutorial ini:
And here's the finished effect:
Let's get started!
Step 1: Duplicate The Background Layer
Dengan foto yang terbuka di Photoshop, saya saat ini memiliki satu
lapisan dalam palet Layers saya, layer "Background", yang berisi gambar
asli saya:
Photoshop Layers palet menampilkan layer Background yang berisi gambar asli saya.
Hal
pertama yang harus saya lakukan dalam menciptakan efek ini adalah
dengan menduplikasi layer ini, dan aku akan melakukannya dengan cara
pintas keyboard, Ctrl + J (Win) / Command + J (Mac), yang menceritakan
Photoshop untuk memberi saya salinan dari lapisan langsung di atasnya:
Layers palet Photoshop sekarang menunjukkan salinan layer Background saya langsung di atasnya, yang memiliki nama "Layer 1".
Photoshop secara otomatis memberi nama layer "Layer 1", yang memberitahu saya apa-apa, jadi aku akan
dua kali klik langsung pada nama layer dan rename menjadi "inframerah":
Double-click on the name "Layer 1" and change it to "infrared".
Step 2: Select The Green Channel In The Channels Palette
Go to your
Channels palette (it's grouped in beside the Layers palette) and
click on the Green channel to select it:
Click on the Green channel in the Channels palette to select it.
This will turn your image temporarily black and white:
The image turns black and white temporarily.
If you don't understand yet how channels in Photoshop work, it may
seem odd that when you selected the green color channel in the Channels
palette, the image turned black and white instead of, well, green. We
won't get into the details here of how channels work, since that would
take an entire tutorial on its own, but what you're seeing here is in
fact the green color information in the image, not as you and I see it
but as Photoshop sees it, since Photoshop sees everything as either
black, white, or some shade of gray in between. If that makes little
sense to you, don't worry, you don't need to understand it to create
this effect. Simply knowing to click on the green channel in the
Channels palette to select it is enough.
We're going to blur this green channel next.
Jika Anda tidak mengerti belum bagaimana saluran dalam kerja
Photoshop, mungkin tampaknya aneh bahwa ketika Anda memilih channel
warna hijau di palet Channels, gambar menjadi hitam dan putih bukan,
baik, hijau. Kami tidak akan masuk ke dalam rincian di sini tentang
bagaimana saluran bekerja, karena itu akan mengambil seluruh tutorial
sendiri, tetapi apa yang Anda lihat di sini sebenarnya adalah informasi
warna hijau pada gambar, tidak seperti yang Anda dan saya melihatnya
tetapi sebagai Photoshop melihatnya, karena Photoshop melihat segala
sesuatu sebagai baik warna hitam, putih, atau abu-abu di antaranya. Jika
yang masuk akal bagi Anda, jangan khawatir, Anda tidak perlu memahami
untuk membuat efek ini. Hanya mengetahui untuk mengklik saluran hijau di
palet Channels untuk memilihnya sudah cukup.
Kita akan mengaburkan saluran ini hijau berikutnya.
Step 3: Apply The Gaussian Blur Filter To The Green Channel
With the Green channel selected in the Channels palette, go up to the
Filter menu at the top of the screen, select
Blur, and then select
Gaussian Blur to bring up Photoshop's Gaussian Blur dialog box:
Go to Filter > Blur > Gaussian Blur to bring up the Gaussian Blur dialog box.
Drag the slider bar at the bottom of the Gaussian Blur dialog box
left or right to increase or decrease the amount of blur you'll be
applying. I'm using a low-resolution image for this tutorial since it's
for the web, and for me, a Radius value of about 4.5 pixels gives me a
nice soft blur effect. Your image will most likely be much higher
resolution, especially if it came from a fairly recent digital camera,
so you'll need to use a higher Radius value. Add a good amount of
blurring while still being able to make out the basic details of the
image, as I've done here:
Tarik slider bar di bagian bawah kotak dialog Gaussian Blur kiri atau
kanan untuk menambah atau mengurangi jumlah blur Anda akan menerapkan.
Saya menggunakan gambar resolusi rendah untuk tutorial ini karena ini
untuk web, dan bagi saya, nilai Radius sekitar 4,5 piksel memberi saya
efek blur bagus lembut. Gambar Anda kemungkinan besar akan resolusi
lebih tinggi, terutama jika itu datang dari kamera digital yang lumayan
baru, sehingga Anda harus menggunakan nilai Radius yang lebih tinggi.
Tambahkan baik jumlah kabur sementara masih bisa untuk melihat rincian
dasar dari gambar, seperti yang telah saya lakukan di sini:
The image after applying Gaussian Blur to the Green channel.
Click OK when you're done to exit out of the Gaussian Blur filter.
Step 4: Change The Blend Mode Of The Infrared Layer To "Screen"
Now that we've applied the Gaussian Blur filter to the Green
channel, switch back to the Layers palette and, with the "infrared"
layer still selected,
change the blend mode of the layer from Normal to
Screen.
To do that, go up to the top of the Layers palette and click on the
down-pointing arrow directly to the right of the word "Normal", which
brings up a list of available layer blend modes. Click on "Screen" to
select it:
Change the blend mode of the "infrared" layer from "Normal" to "Screen".
Here's my image after changing the "infrared" layer blend mode to "Screen":
The image after changing the blend mode of the "infrared" layer to "Screen".
Already at this stage, the image is looking pretty cool, but we're
not quite done yet. We're going to be using a Channel Mixer adjustment
layer next.
Step 5: Add A Channel Mixer Adjustment Layer
We need to bring up a Channel Mixer adjustment layer at this point, and we can do that by clicking on the
New Adjustment Layer icon at the bottom of the Layers palette and selecting
Channel Mixer from the list:
Click the "New Adjustment Layer" icon at the bottom of the Layers palette and select "Channel Mixer".
This brings up the Channel Mixer dialog box:
The Channel Mixer adjustment layer's dialog box.
I've circled in red the options we need to change. In the "Source Channels" section, set
Red to
-50%,
Green to
200%, and
Blue to the same as red,
-50%.
The general rule with these values in the Channel Mixer is that you
want to keep the total value of all three channels at 100%, otherwise
you'll either be losing contrast in the image or losing detail in the
highlights, which is why, in order to set the Green value to 200%, we
lowered both the Red and Blue values to -50%, giving us our 100%. Again,
not something you need to know. I just like to toss these things out
there.
Finally, click the
Monochrome checkbox in the bottom left corner of the dialog box to keep the image in grayscale mode. Click OK when you're done.
Here's my image with the Channel Mixer adjustment layer applied:
Saya telah dilingkari merah pilihan kita perlu berubah. Pada bagian
"Saluran Source", mengatur Red -50%, Green sampai 200%, dan Biru sama
dengan merah, -50%. Aturan umum dengan nilai-nilai di Mixer Channel
adalah bahwa Anda ingin menyimpan nilai total dari ketiga saluran pada
100%, jika tidak, anda baik akan kehilangan kontras dalam gambar atau
kehilangan detail di highlight, itulah sebabnya, dalam memesan untuk
mengatur nilai Hijau untuk 200%, kami menurunkan kedua nilai warna Merah
dan Biru untuk -50%, memberikan kita 100% kami. Sekali lagi, bukan
sesuatu yang perlu Anda ketahui. Aku hanya ingin membuang hal-hal di
luar sana.
Terakhir, klik kotak centang Monokrom di sudut kiri
bawah kotak dialog untuk menjaga image dalam grayscale mode. Klik OK
setelah selesai.
Berikut adalah gambar saya dengan lapisan Channel Mixer penyesuaian diterapkan:
The image after applying the Channel Mixer.
Step 6: Lower The Opacity Of The "Infrared" Layer
At this point, the infrared effect is too intense. Let's reduce it
by lowering the opacity of the "infrared" layer. First, click on the
"infrared" layer in the Layers palette to select it, then go up to the
Opacity option in the top right corner of the Layers palette,
hover your mouse directly over the word "Opacity" to turn your mouse cursor into the "scrubby slider" icon, then
click and drag to the left to lower the opacity value:
Lower the opacity value of the "infrared" layer to reduce the effect.
You'll probably have to reduce the opacity quite a bit. I've reduced mine to 35% in the screenshot above.
Here's my result:
The image after reducing the infrared effect.
The effect is pretty much complete at this point, but it's too
clean. Infrared photos typically have a lot of grain in them, so to
finish off the effect, we're going to add some noise.
Step 7: Add A New Layer Above The Channel Mixer Adjustment Layer
Click on the Channel Mixer adjustment layer in the Layers palette to select it, then use the keyboard shortcut
Shift+Ctrl+N (Win) /
Shift+Command+N (Mac) to bring up Photoshop's
New Layer dialog box:
Use the keyboard shortcut to bring up the New Layer dialog box.
Name the new layer "grain" as I've done in the screenshot above, and
then click OK. Photoshop will add a new blank layer named "grain"
above the Channel Mixer in the Layers palette:
The Layers palette showing the new "grain" layer at the top.
Step 8: Fill The "Grain" Layer With White
Press the letter
D on your keyboard to reset
Photoshop's foreground and background colors to their defaults of black
and white, respectively. Then, with the "grain" layer selected in the
Layers palette, use the keyboard shortcut
Ctrl+Backspace (Win) /
Command+Delete (Mac) to quickly fill this layer with solid white. The image in the document window will temporarily be hidden from view:
Filling the "grain" layer with white temporarily hides the image from view.
Step 9: Add Noise To This Layer
With the "grain" layer still selected, go up to the
Filter menu at the top of the screen, select
Noise, and then select
Add Noise to bring up the "Add Noise" filter dialog box:
Select Filter > Noise > Add Noise to bring up the "Add Noise" filter's dialog box.
As circled in red above, set the
Amount to
20%, set
Distribution to
Uniform, and make sure
Monochromatic at the bottom is
checked.
This adds our grain to the image, but problem is, we still can't see the image below the grain. We'll fix that next:
The solid white layer is now filled with noise to create the "grain" effect, but it's still blocking the image below from view.
Step 10: Change The Blend Mode Of The "Grain" Layer To "Multiply"
Just as we did for the "infrared" layer, we're going to change the
blend mode of this "grain" layer, except this time, instead of changing
it to "Screen", we're going to change it to "Multiply". With the
"grain" layer selected, go back up to the blend mode options at the top
of the Layers palette and this time choose
Multiply from the list:
Change the "grain" layer's blend mode from "Normal" to "Multiply"
As soon as we change the blend mode to Multiply, the image becomes
visible once again through the grain, giving us our final effect:
Setting the blend mode of the "grain" layer to "Multiply" gives us our final infrared effect.
If you find you've added too much grain to the image, simply lower the opacity of the grain layer to reduce the amount.
There's one more thing we could do here with our image, and that's
to bring back some of the original color. You can of course leave it as
is if you want, but if you want to bring back some color, here's how.
Step 11: Duplicate The Background Layer Once Again
Click on the Background layer in the Layers palette to select it, then once again use the keyboard shortcut
Ctrl+J (Win) /
Command+J (Mac) to duplicate it. Since you should always be in the habit of naming your layers, I'll rename this layer to "colorize":
With the Background layer selected, press "Ctrl+J" (Win) /
"Command+J" (Mac) to duplicate the Background layer once again, then
rename it to "colorize".
Step 12: Drag The "Colorize" Layer Up Between The Channel Mixer and Grain Layers
Next, click on the "colorize" layer and drag it up between the
Channel Mixer adjustment layer and the "grain" layer. You'll see the
line dividing the two layers highlight as you get close to it. Release
your mouse at that point to drop the layer into place:
Click and drag the "colorize" layer between the Channel Mixer adjustment layer and the "grain" layer.
Step 13: Change The Blend Mode To "Overlay" And Lower The Opacity To 50%
Finally, change the blend mode of the "colorize" layer from Normal to
Overlay and then lower the opacity of the layer to 50%:
Set the "colorize" layer's blend mode to "Overlay" and lower the opacity to 50%.
And we're done! We've brought some of the original color back into the effect.
Here's the image as it was back before we started:
The original image once again for comparison.
And here's the final result:
The final result.
