{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# ipythonblocks.ImageGrid"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"To learn more about `ipythonblocks` visit the homepage at [https://github.com/jiffyclub/ipythonblocks](https://github.com/jiffyclub/ipythonblocks).\n",
"\n",
"`ImageGrid` is a class that imitates image manipulation libraries like [PIL](http://www.pythonware.com/products/pil/).\n",
"Key differences from `BlockGrid` are:\n",
"\n",
"* Only 2D indexing is supported\n",
"* Indices are [column, row]\n",
"* Grid units are `Pixel` objects, which have `.x` (column) and `.y` (row) attributes\n",
"* Grid origin defaults to the lower-left corner, but can be set to the upper-left"
]
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {},
"outputs": [],
"source": [
"from ipythonblocks import ImageGrid"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
""
],
"text/plain": [
""
]
},
"execution_count": 2,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"grid = ImageGrid(10, 10, fill=(124, 124, 124), block_size=15)\n",
"grid"
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
""
],
"text/plain": [
""
]
},
"execution_count": 4,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"for pixel in grid:\n",
" if pixel.x < 5:\n",
" pixel.green = 255\n",
" elif pixel.x > 5 and pixel.y >= 5:\n",
" pixel.blue = 255\n",
"grid"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
""
],
"text/plain": [
""
]
},
"execution_count": 5,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"grid[:3, :3] = (255, 124, 124)\n",
"grid"
]
},
{
"cell_type": "code",
"execution_count": 6,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
""
],
"text/plain": [
""
]
},
"execution_count": 6,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"grid[::4, ::4] = (0, 0, 0)\n",
"grid"
]
},
{
"cell_type": "code",
"execution_count": 7,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
""
],
"text/plain": [
""
]
},
"execution_count": 7,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"grid[6, :] = (255, 0, 255)\n",
"grid"
]
},
{
"cell_type": "code",
"execution_count": 8,
"metadata": {},
"outputs": [
{
"data": {
"text/html": [
""
],
"text/plain": [
""
]
},
"execution_count": 8,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"grid[:, 6] = (255, 255, 0)\n",
"grid"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.6.1"
},
"varInspector": {
"cols": {
"lenName": 16,
"lenType": 16,
"lenVar": 40
},
"kernels_config": {
"python": {
"delete_cmd_postfix": "",
"delete_cmd_prefix": "del ",
"library": "var_list.py",
"varRefreshCmd": "print(var_dic_list())"
},
"r": {
"delete_cmd_postfix": ") ",
"delete_cmd_prefix": "rm(",
"library": "var_list.r",
"varRefreshCmd": "cat(var_dic_list()) "
}
},
"types_to_exclude": [
"module",
"function",
"builtin_function_or_method",
"instance",
"_Feature"
],
"window_display": false
}
},
"nbformat": 4,
"nbformat_minor": 1
}