Blur for Picasso (Android)

• Simple Transformation class to blur an image for Picasso
• Blur time: 1-3 ms*

Usage

Step 1 (Add BlurTransform class to your project)

Step 2 (Add to Picasso)

Picasso.get().load(YOUR_URL).transform(BlurTransform(scale = 0.1f,radius = 1)).into(YOUR_IMAGE_VIEW)

Docs & Performace & Sample Screenshots

Docs

BlurTransform takes 2 parameters

• scale
• radius

Scale - scales your bitmap using this formula

val width = Math.round(sentBitmap.width * scale)
val height = Math.round(sentBitmap.height * scale)

It is recommened not to pass a number higher then 1 (your origial bitmap size), as it will requere extra time to prosses & huge memory allocations

Additional notes: You can't pass 0, as this will thow an exeption.

Radius - radius to blur out pixels

Higher the number - more blur Very high numbers will increase prossesing time It is recomened to keep your number between 1 and 50 You can not pass 0, as this will thow an exeption.

Screenhots

Scale	Radius	Output
0.1	1	Add image
0.1	10	Add image
0.5	5	Add image

Performace

*Time is milliseconds *Big bitmaps were used for performnce test (width = 5000px, height = 3000px)

Normal usage (down-scale bitmap) Recommended

Scale	0.1	0.1	0.1	0.1	0.1
Radius	1	10	20	50	100
Time	3	6	15	16	35

It is recommened to use scale between 0.1 and 1

The Best Performace Between 0.1 And 0.5

No scale, x1

Scale	1	1	1	1	1
Radius	1	10	20	50	100
Time	48	52	57	82	117

Crazy usage, bitmap scaled x5 (not recommened), just for comparisin

Scale	5	5	5	5	5
Radius	1	10	20	50	100
Time	766	886	1054	1443	1581

Test device: Huawei P9 Android OS: 7.0