# Image Basics

## RODS AND CONES ARE COLOR

![](https://lh5.googleusercontent.com/2p8yiZZNCc1NXa_tXFF_mky1D_Wlhg_U1VixkVesMnBVEM2pNY9i4XE6SIlzD8ayryZ9POZouCd5-ALdxPb3Qgg3ljZ5zNNlwvQHDS9P0zkHtnzEv604s08jeWIf2Z1OLVIxJfqAj88)

## COLOR MATCHING

![](https://lh3.googleusercontent.com/8uNFg1Hr1vugS6vB8935tOa52dqVkQvLwmKRMfk57Ib_c6RAX_V5up_zbeYxoZVLkZNCH8Qw5UukR4C-OASciJOIzqNfFdXhZsuASlZwskSpZydyTKAfmvBlpA04Yp9qp02EFTx79us)

![](https://lh5.googleusercontent.com/QXyZIAv-NKDMg5Jypx4-WyZqE6vz8N0PrQcYlpKYDOwzpWKwqRVqbWa1w4ZoZ7anm7mTTqqAhlE-DFmDOiVKfIt3ibEz5Oz7sLTePWrRkSA2zoY1fusE6WonXHkIVwxzeXEqPsilZ3o)

## **Color image: 3d tensor in colorspace**

![](https://lh5.googleusercontent.com/QVgJTjkprTkoP28McyKFlpF6pLghOAKUi5MSj3YRiocdxaN8lnYOkrtgQ-dKRbQdrb1-8vZhNypo9nYAD589hKTm7GzM3w1CnvKwZhtL-2TKW5_XcXXwtDKjJ1JGSI8c0Va-U0Eb0PU)

![](https://lh4.googleusercontent.com/1ps5Rj4Nv22zN8xQtBIRY0qdPtQJdHBJNG_fu2w3AwHvSkLMTqjrtnpPpOZThvsnjMA6fQL6hk6DSwHJ05jvjmIWhxNn-a69xSHFrZadOIOQtJsLGzJtsUcXettnxNXL9w18sb6_aTY)

**Hue** ![](https://lh4.googleusercontent.com/Mf-krg8ap-dFRXlBg1EWb02fjahAV62FRrFCFEv5EXUFFiHf4fZjWp_2zjVfng2yKYFkI2EtOuak7u_Uerj-_IqPC2gyhLhZF6kdLASu7yCD2kCm8sKILTmdV9q8XlKRI9uiuZR-7vk)\*\*\*\*

**Value** ![](https://lh5.googleusercontent.com/pqeirRkZhcSeGMu2gzHtcJnBdi1Z1WGuvtTm_H3jz_zzXCWmfHwrYdgW8rjrJ_h2T1Xh1bCOLic2X1LiRfv-d9GCqhlQjlm4TuRyHxLu0rrjjBSol6PmzTzCFquLOo492pPWqWr1Zmg) *\*\**

**Saturation** ![](https://lh3.googleusercontent.com/RapD7jmX54pDsLAHSBba22cl619nelqcbKB3uNInduNXe6CwCbf42AXMJQhBfm7oZP3FxBfqT5YNPFQoeSMMZwyKVAU12wcaDoMBebSvjIEvZxScLbPE1UuA1q1GERWGkPMGTjtg3uw)

## INTERPOLATION

### TRIANGLE INTERPOLATION

![Q = V1\*A1 + V2\*A2 + V3\*A3](https://lh4.googleusercontent.com/cRwDkdeMr4D3f-N1WWhGfJVrkSFjuwo3F-V9Fda2I9o9Z51sQQzUZ0mJEMFRHEIQXx6bsxKsPaxpQ1S1xNsykrpHHdl6ilEqYwaZDdZbG0V2pJlFC6lILFGlcAIM7n5_rtJxadi-zR4)

### BILINEAR INTERPOLATION

![Q = V1\*A1 + V2\*A2 + V3\*A3 + V4\*A4](https://lh5.googleusercontent.com/NY5XajXYdEeHdWS5R81n4UEbX8P08jtI2fChv2ScG-Wkbw3tHHzvVJd8RHClmugkiV_RPk8pEMJG08iDkGhZTnygeuiZDi2SCKO5row0_RV-aGVrkhfH4K-o4ZV9nTZTUa9V8Vn7rFc)

### **BICUBIC: more complex, maybe better?**

![](https://lh6.googleusercontent.com/J42_B5jH3WOY2VzPzMuLc57gFSfZoVWjLsxJzOpE01Q6JWdFa0hM3_MQRX-s4N2j9eSX04drSpsqCHgqSCgsHbZIClEOfGtrw_GEXfiYlw_dgYwG0heo_jE1vGXVGGR4QVAeNFD9fhM)
